WO2022012440A1 - 物理下行控制信道pdcch监测方法、装置及终端 - Google Patents

物理下行控制信道pdcch监测方法、装置及终端 Download PDF

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Publication number
WO2022012440A1
WO2022012440A1 PCT/CN2021/105573 CN2021105573W WO2022012440A1 WO 2022012440 A1 WO2022012440 A1 WO 2022012440A1 CN 2021105573 W CN2021105573 W CN 2021105573W WO 2022012440 A1 WO2022012440 A1 WO 2022012440A1
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WIPO (PCT)
Prior art keywords
search space
monitoring
space group
terminal
pdcch
Prior art date
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Ceased
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PCT/CN2021/105573
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English (en)
French (fr)
Inventor
薛祎凡
薛丽霞
张战战
铁晓磊
徐海博
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP21841308.6A priority Critical patent/EP4171144B1/en
Priority to EP24212541.7A priority patent/EP4529293A3/en
Publication of WO2022012440A1 publication Critical patent/WO2022012440A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/231—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0838—Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the field of communications technologies, and in particular, to a method, apparatus, and terminal for monitoring a physical downlink control channel PDCCH.
  • the base station sends downlink control information (DCI) to the terminal through a physical downlink control channel (physical downlink control channel, PDCCH).
  • DCI contains downlink data scheduling information, which is used to indicate what time-frequency resource location the terminal is at, and what configuration parameters are used to receive and demodulate data.
  • the terminal When the terminal receives DCI, it needs to perform blind detection (blind detect, BD) in multiple PDCCH candidate positions (PDCCH candidates) in the downlink control region.
  • a set of PDCCH candidate positions that the terminal needs to blindly detect form a search space set group (SSSG).
  • the terminal may monitor one or more search space groups to find out whether a base station sends its own PDCCH.
  • the terminal can switch the search space group when monitoring the PDCCH.
  • the base station configures two search space groups (search space group 0 and search space group 1) for the terminal, and the monitoring periods of search space group 0 and search space group 1 are different.
  • search space group 0 search space group 1
  • the terminal monitors the PDCCH according to the search space group 0; when the base station preempts the channel, the terminal monitors the PDCCH according to the search space group 1.
  • the terminal can monitor the PDCCH by using a more suitable monitoring period under different conditions, so as to achieve the purpose of energy saving and the like.
  • the terminal is not suitable for switching the search space group in the above manner.
  • Embodiments of the present application provide a method, device, and terminal for monitoring a physical downlink control channel PDCCH, which solve the problem in the prior art that the terminal is not suitable for switching search space groups according to whether the base station preempts the channel for licensed spectrum.
  • a first aspect provides a physical downlink control channel PDCCH monitoring method, the method is applied to a terminal, and the method includes: the terminal receives search space information configured by a network device, and the search space information includes a first search space group and a second search space group. space group information; when the terminal monitors the PDCCH according to the second search space group, if the terminal receives downlink control information DCI for data scheduling, the terminal stops monitoring the PDCCH according to the second search space group, and starts monitoring according to the first search space group PDCCH.
  • the terminal can switch the search space group according to the type of the received information.
  • the terminal switches to the first search space group to monitor the PDCCH, which helps to quickly complete the data transmission, reducing the data transmission delay.
  • the terminal selects a search space group with a suitable monitoring period to monitor the PDCCH according to whether scheduling data is required.
  • the terminal can monitor the PDCCH according to the second search space group with a relatively large monitoring period to reduce the power consumption of the terminal. Extend the standby time of the terminal.
  • the first search space group has a first configuration parameter
  • the second search space group has a second configuration parameter
  • the parameters related to time domain monitoring in the second configuration parameters are the first configuration parameters and A subset of parameters related to time domain monitoring
  • the parameters related to frequency domain monitoring in the second configuration parameters are a subset of parameters related to frequency domain monitoring in the first configuration parameters.
  • the terminal and the network device By configuring the first configuration parameter of the first search space group and the second configuration parameter of the second search space group to have a nested relationship, it can be avoided that the terminal and the network device lose scheduling in the case of misalignment. In this way, when the two sides of the time slot of the network device and the terminal are not aligned due to some error conditions, the scheduling information sent by the network device can also be received by the terminal.
  • a second aspect provides a physical downlink control channel PDCCH monitoring method, the method is applied to a terminal, the method includes: the terminal receives search space information configured by a network device, the search space information includes a first search space group and a second search space group space group information; when the terminal monitors the PDCCH according to the second search space group, if the terminal sends the first signal to the network device, after sending the first signal, the terminal stops monitoring the PDCCH according to the second search space group, and starts searching according to the first search space group.
  • the space group monitors the PDCCH, where the first signal includes at least one of the following signals or channels: random access preamble, scheduling request SR, hybrid automatic repeat request negative acknowledgement NACK, and/or physical uplink shared channel PUSCH .
  • the terminal can determine whether to switch the search space group according to the type of the first signal sent to the network device, so that the terminal has uplink data that needs to be scheduled, or when the terminal is in an abnormal state, by initiating random access
  • the terminal can switch to the first search space group with a relatively short monitoring period, and monitor the PDCCH according to the first search space group, which can reduce PDCCH monitoring, reduce terminal power consumption, and reduce signaling overhead.
  • a communication device may be a terminal or a chip or a system-on-chip in the terminal, the communication device includes: a processor and a memory, the memory stores an instruction, and when the instruction is executed by the processor, the communication
  • the apparatus performs the following steps: receiving the search space information configured by the network equipment, the search space information includes the information of the first search space group and the second search space group; when monitoring the PDCCH according to the second search space group, if the information for data scheduling is received If the downlink control information is DCI, the monitoring of the PDCCH according to the second search space group is stopped, and the monitoring of the PDCCH according to the first search space group is started.
  • a communication device may be a terminal or a chip or a system-on-chip in the terminal, the communication device includes: a processor and a memory, the memory stores an instruction, and when the instruction is executed by the processor, the communication
  • the apparatus performs the following steps: receiving the search space information configured by the network equipment, the search space information includes the information of the first search space group and the second search space group; when monitoring the PDCCH according to the second search space group, if sending the first search space group to the network equipment signal, after sending the first signal, stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the first search space group, wherein the first signal includes at least one of the following signals or channels: random access preamble preamble code, scheduling request SR, hybrid automatic repeat request negative acknowledgement NACK, and/or physical uplink shared channel PUSCH.
  • a communication device comprising: a communication module and a processing module.
  • the communication module is configured to receive search space information configured by a network device, where the search space information includes information of a first search space group and a second search space group.
  • the processing module is configured to stop monitoring the PDCCH according to the second search space group and start monitoring the PDCCH according to the first search space group if receiving downlink control information DCI for data scheduling when monitoring the PDCCH according to the second search space group.
  • a communication device comprising: a communication module and a processing module.
  • the communication module is configured to receive search space information configured by a network device, where the search space information includes information of a first search space group and a second search space group.
  • the processing module is configured to, when monitoring the PDCCH according to the second search space group, if the first signal is sent to the network device, after sending the first signal, stop monitoring the PDCCH according to the second search space group, and start monitoring according to the first search space group PDCCH, wherein the first signal includes at least one of the following signals or channels: random access preamble code, scheduling request SR, hybrid automatic repeat request negative acknowledgement NACK, and/or physical uplink shared channel PUSCH.
  • a computer-readable storage medium where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a terminal, the terminal can be made to execute any one of the design procedures in the first aspect to the second aspect. methods involved.
  • a computer program product containing instructions which, when executed on a terminal, enables the terminal to execute the method involved in any one of the designs of the first aspect to the second aspect.
  • a chip in a ninth aspect, includes a processor, and when the processor executes an instruction, the processor is configured to execute the method involved in any one of the designs of the first aspect to the second aspect.
  • the instruction can come from memory inside the chip or from memory outside the chip.
  • the chip further includes an input and output circuit.
  • a communication system including a network device and a terminal.
  • the terminal is configured to execute the PDCCH monitoring method involved in any design of the first aspect or the second aspect.
  • the PDCCH monitoring method, device, and terminal provided by the embodiments of the present application have the following advantages:
  • the terminal receives the information of one or more search space groups configured by the base station. Since the monitoring period of the search space in each search space group may be different, when the terminal monitors the PDCCH according to the second search space group, if the terminal receives If the data is scheduled for DCI, the terminal can switch the search space group and start monitoring the PDCCH according to the first search space group.
  • the terminal switches to the first search space group with a relatively small monitoring period to monitor the PDCCH, It is helpful to complete data transmission quickly and reduce the delay of data transmission; the terminal selects a search space group with a suitable monitoring period to monitor the PDCCH according to whether it needs to schedule data.
  • the search space group monitors the PDCCH, reduces the power consumption of the terminal, and prolongs the standby time of the terminal.
  • FIG. 1 is a schematic diagram of a scenario of a PDCCH monitoring method provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of a data transmission process according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of steps of a PDCCH monitoring method provided by an embodiment of the present application.
  • 5(a) is a schematic interface diagram of a terminal during video buffering provided by an embodiment of the present application.
  • 5(b) is a schematic interface diagram of a terminal during a video playback process provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of steps of another PDCCH monitoring method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a time relationship of a terminal switching search space groups according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a non-contention-based random access process according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a random access process based on contention resolution according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a starting process of a random access contention resolution timer according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a process of starting a downlink retransmission timer for discontinuous reception provided by an embodiment of the present application;
  • FIG. 12 is a schematic diagram of a start process of another DRX downlink retransmission timer provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a process of starting or restarting a first search space group timer according to an embodiment of the present application
  • FIG. 14 is a schematic diagram of another start or restart process of a first search space group timer provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a chip provided by an embodiment of the present application.
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect.
  • the first search space group and the second search space group are only for distinguishing different search space groups, and the number and execution order thereof are not limited.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application.
  • the evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And/or”, which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an "or” relationship.
  • At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • at least one item (a) of a, b, or c may represent: a, b, c, ab, ac, bc, or abc, where a, b, and c may be single or multiple .
  • configuration refers to configuration through radio resource control (radio resource control, RRC) signaling, or configuration through MAC control element (MAC control element, MAC CE), or through DCI configuration, or through other signaling
  • RRC radio resource control
  • MAC control element MAC control element
  • DCI configuration or through other signaling
  • the "indication” in this embodiment of the present application may be indicated by RRC signaling, or indicated by MAC CE, or indicated by DCI, or indicated by other signaling.
  • FIG. 1 it is a schematic diagram of a scenario of a PDCCH monitoring method provided by an embodiment of the present application.
  • a network device 101 and a terminal 102 are included.
  • the data transmission between the network device and the terminal is carried out according to the following process: the network device sends DCI to the terminal, the DCI contains downlink data scheduling information, and the network device tells the terminal what time-frequency resource location through the downlink data scheduling information. , with what configuration parameters (such as modulation and coding scheme (modulation and coding scheme, MCS), redundancy version (redundancy version, RV), etc.) to receive and demodulate downlink data.
  • MCS modulation and coding scheme
  • RV redundancy version
  • the network device sends the corresponding downlink data at the time-frequency resource location indicated in the DCI using the configuration parameters indicated in the DCI, and the terminal receives the corresponding parameters at the corresponding location.
  • the DCI contains uplink data scheduling information
  • the terminal sends the corresponding uplink data with the configuration parameters indicated in the DCI at the time-frequency resource position indicated in the DCI
  • the network device receives the corresponding parameters at the corresponding position.
  • the above process can be referred to as shown in FIG. 2 .
  • the PDCCH carries DCI
  • the physical downlink shared channel (PDSCH) carries downlink data
  • the physical uplink shared channel (PUSCH) carries uplink data.
  • the network device 101 shown in FIG. 1 may be a base station or a base station controller for wireless communication.
  • the base station may include various types of base stations, such as a micro base station (also referred to as a small cell), a macro base station, a relay station, an access point, etc., which are not specifically limited in this embodiment of the present application.
  • the base station may be a global system for mobile communication (GSM), a base station (base transceiver station, BTS) in a code division multiple access (code division multiple access, CDMA), a broadband Base station (node B) in code division multiple access (WCDMA), evolved base station (evolutional node B, eNB or e-NodeB) in long term evolution (LTE), Internet of Things (eNB in internet of things (IoT) or narrowband Internet of things (NB-IoT), base station in future 5G mobile communication network or future evolved public land mobile network (PLMN) , the embodiments of the present application do not impose any limitation on this.
  • the apparatus for implementing the function of the network device may be the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system.
  • the technical solutions provided by the embodiments of the present application are described by taking the apparatus for implementing the functions of the network equipment as the network equipment as an example.
  • the network device described in the embodiments of the present application such as a base station, generally includes a baseband unit (baseband unit, BBU), a remote radio unit (remote radio unit, RRU), an antenna, and a feeder for connecting the RRU and the antenna.
  • BBU baseband unit
  • RRU remote radio unit
  • the BBU is used for signal modulation.
  • the RRU is responsible for radio frequency processing.
  • the antenna is responsible for the conversion between the guided traveling waves on the cable and the space waves in the air.
  • the distributed base station greatly shortens the length of the feeder between the RRU and the antenna, which can reduce the signal loss and the cost of the feeder.
  • the RRU plus antenna is relatively small and can be installed anywhere, making network planning more flexible.
  • all BBUs can be centralized and placed in the central office (CO). This centralized method can greatly reduce the number of base station computer rooms and reduce supporting equipment, especially air conditioners. Energy consumption can reduce a lot of carbon emissions.
  • the scattered BBUs after the scattered BBUs are integrated into a BBU baseband pool, they can be managed and scheduled in a unified manner, and resource allocation is more flexible. In this mode, all physical base stations have evolved into virtual base stations. All virtual base stations share the user's data transmission and reception, channel quality and other information in the BBU baseband pool, and cooperate with each other to realize joint scheduling.
  • the base station may include centralized units (CUs) and distributed units
  • the base station may also include an active antenna unit (AAU).
  • the CU implements some functions of the base station, and the DU implements some functions of the base station.
  • the CU is responsible for processing non-real-time protocols and services, and implementing functions of radio resource control (RRC) and packet data convergence protocol (PDCP) layers.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing physical layer protocols and real-time services, and implementing functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers.
  • RLC radio link control
  • MAC media access control
  • PHY physical layers.
  • AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas.
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in the RAN, and the CU can also be divided into network devices in the core network (core network, CN), which is not limited here.
  • the terminal 102 shown in FIG. 1 is a device with wireless transceiving function.
  • Terminals can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal equipment may be user equipment (user equipment, UE).
  • the UE includes a handheld device, a vehicle, an in-vehicle device, a wearable device or a computing device with a wireless communication function.
  • the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • the terminal device may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, intelligent Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the device for implementing the function of the terminal may be a terminal, or may be a device capable of supporting the terminal to implement the function, such as a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the functions of the terminal as the terminal as an example.
  • FIG. 3 shows a schematic structural diagram of a terminal.
  • the terminal includes: at least one processor 301 , a communication line 302 , a memory 303 and at least one communication interface 304 .
  • the processor 301 can be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors for controlling the execution of the programs of the present application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication line 302 may include a path to communicate information between the aforementioned components.
  • the communication interface 304 using any transceiver-like device, is used to communicate with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (WLAN), and the like.
  • devices or communication networks such as Ethernet, RAN, wireless local area networks (WLAN), and the like.
  • Memory 303 may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, CD-ROM storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of being executed by a computer Access any other medium without limitation.
  • the memory may exist independently and be connected to the processor through communication line 302 .
  • the memory can also be integrated with the processor.
  • the memory provided by the embodiments of the present application may generally be non-volatile.
  • the memory 303 is used for storing computer-executed instructions for executing the solution of the present application, and the execution is controlled by the processor 301 .
  • the processor 301 is configured to execute the computer-executed instructions stored in the memory 303, thereby implementing the methods provided by the following embodiments of the present application.
  • the computer-executed instructions in the embodiment of the present application may also be referred to as application code, which is not specifically limited in the embodiment of the present application.
  • the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3 .
  • the terminal may include multiple processors, for example, the processor 301 and the processor 307 in FIG. 3 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • the terminal may further include an output device 305 and an input device 306 .
  • the output device 305 is in communication with the processor 301 and can display information in a variety of ways.
  • the output device 305 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT), a display device, or a projector (projector). )Wait.
  • Input device 306 is in communication with processor 301 and can receive user input in a variety of ways.
  • the input device 306 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.
  • FIG. 4 it is a schematic flowchart of steps of a PDCCH monitoring method provided by an embodiment of the present application.
  • the method may be applied to the terminal 102 shown in FIG. 1 , and the terminal 102 may be a terminal having the structure shown in FIG. 3 .
  • the PDCCH monitoring method provided in this embodiment of the present application is described below by taking the terminal 102 as a mobile phone.
  • the method may include the following steps:
  • the terminal receives search space information configured by a network device, where the search space information includes information of a first search space group and a second search space group.
  • the network device may be the base station 101 shown in FIG. 1 .
  • the base station configures one or more search space groups (search space set groups, SSSG) for the terminal.
  • the terminal needs to monitor one or more search space groups to find out whether there is a PDCCH sent by the base station to itself.
  • each PDCCH consists of one or more control channel elements (CCEs).
  • CCEs control channel elements
  • the number of CCEs contained in a PDCCH is called an aggregation level (AL).
  • A aggregation level
  • the aggregation level of the PDCCH is 1; when a PDCCH consists of 2 CCEs, the aggregation level of the PDCCH is 2, and so on.
  • the possible aggregation levels can include several, such as 1, 2, 4, 8 and 16, for a total of 5.
  • the time-frequency range can be called a search space.
  • the search space usually occurs periodically in time.
  • a search space group may include one or more search spaces, that is, it can be understood that a whole composed of one or more search spaces is called a search space group.
  • the relevant configuration information elements may include:
  • searchSpacesToAddModList Add search space configurations to the list, which lists one or more search spaces configured by the base station to the terminal.
  • searchSpacesToReleaseList Remove search spaces from the list.
  • search space may be called differently in different documents.
  • a search space might also be called a search space set.
  • the configuration items of each search space may include a monitoring period and an offset value when monitoring the search space, symbols to be monitored in a time slot, the number of blind detections required for each aggregation level, and so on.
  • the relevant configuration for IE looks like this:
  • controlResourceSetId Represents the index value of the control resource set (CORESET) associated with the search space. According to the configuration of the associated CORESET, the frequency domain resources occupied by the search space, the duration of the symbol length to be monitored, the mapping method of the control channel element (CCE) to the resource element group (REG), Precoding granularity, Transmission Configuration Indicator (TCI) state configuration, etc.
  • monitoringSlotPeriodicityAndOffset represents the monitoring period and offset value of the time slot to be monitored in the search space.
  • slx is used to represent the size of the period.
  • sl1 means that the monitoring period is 1 timeslot, which means that the terminal monitors the PDCCH every 1 timeslot
  • sl8 means that the monitoring period is 8 timeslots, which means that the terminal can monitor the PDCCH every 8 timeslots .
  • After selecting a period value it is also necessary to indicate the monitoring offset value. For example, after the network device is configured with sl8 (that is, the monitoring period is 8 timeslots), it also needs to configure the number of timeslots in a period to start monitoring the search space. each time slot.
  • duration represents the time domain length that the search space lasts for each time it occurs, in units of time slots, that is, the number of time slots that need to be monitored in one cycle.
  • monitoringSymbolsWithinSlot represents the start symbol to be monitored in the search space in the time slot to be monitored, and its value is a bit sequence with a length of 14, indicating whether the 14 symbols in a time slot are the start to be monitored. symbol. For example, if its value is 10000001000000, the starting symbols to be monitored in one time slot are symbol 0 and symbol 7. If the duration of the CORESET associated with the search space is 3 at this time, all symbols to be monitored are symbol 0, symbol 1, symbol 2, symbol 7, symbol 8, and symbol 9.
  • nrofCandidates Represents the number of PDCCH candidates that need to be blindly checked for each aggregation level in the search space.
  • aggregationLevelx Represents the number of times that the PDCCH candidate with aggregation level x needs to be blindly checked. For example, the value of aggregationLevel1 is n6, which means that the PDCCH candidate with aggregation level of 1 needs to be blindly checked 6 times.
  • searchSpaceType Represents the type of the search space. When the value of searchSpaceType is common, it indicates that the search space is a common search space. At this time, the parameters that can be configured are: dci-Format0-0-AndFormat1-0, dci-Format2-0, dci-Format2-1, dci-Format2-2, dci-Format2-3. When any one of the above parameters is configured, it indicates that the terminal needs to monitor the DCI of the corresponding format in the search space.
  • dci-Format0-0-AndFormat1-0 it means that the terminal needs to monitor DCI format 0_0 and DCI format 1_0 in the search space; when dci-Format0-0-AndFormat1-0 is not configured, it means that the terminal does not need to monitor DCI format 0_0 and DCI format 1_0 in the search space.
  • DCI format 0_0 and DCI format 1_0 are monitored in this search space.
  • searchSpaceType is UE-specific, it indicates that the search space is a user equipment specific search space.
  • the parameters that can be configured are: formats0-0-And-1-0 or formats0-1-And-1-1. When any one of the above parameters is configured, it indicates that the terminal needs to monitor the DCI of the corresponding format in the search space.
  • the search space group configured by the base station for the terminal may include a first search space group and a second search space group.
  • the terminal may acquire the configuration information of the first search space group and the second search space group by receiving the DCI sent by the base station.
  • the monitoring period of the search space included in the first search space group is less than or equal to the monitoring period of the search space included in the second search space group.
  • the terminal monitors the PDCCH according to the second search space group
  • the terminal receives downlink control information DCI for data scheduling
  • the terminal stops monitoring the PDCCH according to the second search space group, and starts to monitor the PDCCH according to the second search space group.
  • the first search space group monitors the PDCCH.
  • the terminal may switch the monitored search space group according to the specific requirements of data scheduling.
  • each search space group includes multiple search spaces, and the monitoring period of each search space is independently configured.
  • the base station may configure the monitoring period of each search space in each search space group to be the same size, or may be configured to have different sizes.
  • the monitoring period of each search space included in the first search space group is smaller than the monitoring period of each search space included in the second search space group.
  • the first search space group includes a first search space and a second search space
  • the second search space group includes a third search space and a fourth search space.
  • the monitoring periods of the first search space and the second search space may be 3 time slots and 4 time slots, respectively.
  • the monitoring periods of the third search space and the fourth search space may be 6 time slots and 8 time slots, respectively.
  • the monitoring period of each search space in the first search space group is smaller than the monitoring period of each search space in the second search space group.
  • the monitoring period of some search spaces is smaller than the monitoring period of each search space in the second search space group.
  • the monitoring periods of the first search space and the second search space may be 3 time slots and 10 time slots, respectively.
  • the monitoring periods of the third search space and the fourth search space may be 6 time slots and 8 time slots, respectively.
  • the monitoring period of the partial search spaces in the first search space group is smaller than the monitoring period of the search spaces in the second search space group.
  • the monitoring period of each search space in the first search space group and the monitoring period of each search space in the second search space group can be configured to be any size, and the size of the monitoring period of each search space is not limited in this embodiment of the present application.
  • the terminal monitors the PDCCH according to the second search space group with a relatively large monitoring period
  • the terminal receives the DCI for data scheduling, it means that there may be data that needs to be transmitted currently between the base station and the terminal.
  • the terminal continues to monitor the PDCCH by using the second search space group with a relatively large monitoring period, the data transmission time may be prolonged, resulting in an excessively large data transmission delay.
  • the terminal can stop monitoring the PDCCH according to the second search space group and start monitoring the PDCCH according to the first search space group with a relatively short monitoring period, which helps to complete data transmission quickly and reduce data transmission delay.
  • the DCI used for data scheduling may belong to the DCI scrambled using any of the following radio network temporary identity (RNTI):
  • RNTI radio network temporary identity
  • the cell radio network temporary identifier C-RNTI, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI is not limited to, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI.
  • the terminal when the terminal monitors the PDCCH according to the second search space group, if DCI for data scheduling is received, when the terminal starts monitoring the PDCCH according to the first search space group, the terminal also monitors the PDCCH according to the first search space group.
  • the monitoring of the PDCCH according to the second search space group may not be stopped, but the PDCCH may be monitored according to the first search space group and the second search space group simultaneously.
  • the terminal when the terminal monitors the PDCCH according to the first search space group, if DCI for data scheduling is received, the terminal may continue to monitor the PDCCH according to the first search space group without The search space group needs to be switched.
  • the terminal may be configured with a timer, and the time for using different search space groups is limited by the timer. For example, when the timer is started, the terminal switches from the second search space group to the first search space group. When the timer times out, the terminal can switch from the first search space group back to the second search space group.
  • the terminal receives information of one or more search space groups configured by the base station. Since the monitoring periods of the search spaces included in different search space groups may be different, when the terminal monitors the PDCCH according to the second search space group , if the terminal receives the DCI for data scheduling, the terminal can start monitoring the PDCCH according to the first search space group.
  • the terminal When the monitoring period of each search space in the first search space group is relatively small, for example, the monitoring period of all or part of the search spaces in the first search space group is smaller than the monitoring period of each search space in the second search space group, the terminal will When receiving the DCI for data scheduling, switching from the second search space group with a relatively large monitoring period to the first search space group with a relatively small monitoring period helps to quickly complete data transmission and reduce data transmission delay ;
  • the terminal selects a search space group with a suitable monitoring period to monitor the PDCCH according to whether scheduling data is required. When there is no data transmission, it can monitor the PDCCH according to the second search space group with a relatively large monitoring period, reducing the power consumption of the terminal and extending the The standby time of the terminal.
  • the terminal when data arrives, the terminal can switch the search space group. For example, switching from the second search space group to the first search space group. If the monitoring period of each search space in the second search space group is relatively large, the terminal can quickly schedule data after switching to the first search space group with a relatively small monitoring period.
  • one of the identifiers of data arrival is that the terminal receives a preset DCI (scheduling DCI, that is, the DCI of the scheduling data).
  • the scheduling DCI includes the use of C-RNTI, MCS-C-RNTI or CS-RNTI. scrambled DCI.
  • the terminal can monitor the DCI scrambled using the above-mentioned C-RNTI, MCS-C-RNTI or CS-RNTI in the UESS. Therefore, in a possible implementation manner of the embodiment of the present application, the DCI used for data scheduling may be the DCI scrambled using C-RNTI, MCS-C-RNTI or CS-RNTI within the UESS.
  • the terminal needs to always monitor the PDCCH in the CSS.
  • the first search space group and the second search space group are only for the user equipment specific search space UESS, and the common search space CSS does not belong to any search space group, The terminal needs to always monitor the PDCCH in the CSS.
  • the common search space CSS can be divided into the following categories:
  • Type 0 CSS used to transmit and schedule DCI of SIB1, configured through MIB, or configured through PDCCH-ConfigCommon, wherein the monitored DCI is scrambled with SI-RNTI;
  • Type 0A CSS used to transmit the DCI of the scheduling OSI (that is, other SIBs other than SIB1, such as SIB2/SIB3, etc.), configured through PDCCH-ConfigCommon, wherein the monitored DCI is scrambled with SI-RNTI;
  • Type 1 CSS used to transmit the DCI related to the random access process, configured through PDCCH-ConfigCommon, where the monitored DCI is scrambled with RA-RNTI, MsgB-RNTI or TC-RNTI;
  • Type 2 CSS used to transmit DCI for paging, configured through PDCCH-ConfigCommon, wherein the monitored DCI is scrambled with P-RNTI;
  • Type 3 CSS used to transmit other types of DCI except the above types, configured through PDCCH-Config, where the monitored DCI can be scrambled with any of the following RNTIs: INT-RNTI, SFI-RNTI, TPC-PUSCH - RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI, CI-RNTI, PS-RNTI, C-RNTI, MCS-C-RNTI or CS-RNTI(s).
  • the DCI used for data scheduling may also be the use of C-RNTI, MCS-C-RNTI or CS-RNTI in the third type of common search space CSS type 3 scrambled DCI.
  • the first search space group and the second search space group are only for user equipment specific search spaces UESS and Type 3 CSS, while other types of CSS do not belong to any search space group, and the terminal needs to always be in other types of CSS (such as PDCCH is monitored in Type 0 CSS, Type 0A CSS, Type 1 CSS and Type 2 CSS).
  • the terminal may determine whether a downlink service arrives currently by judging whether the received DCI belongs to the DCI used for data scheduling. If a downlink service arrives, the terminal can switch the search space group and start monitoring the PDCCH according to the first search space group. If the monitoring period of all or part of the search spaces in the first search space group is smaller than the monitoring period of each search space in the second search space group before handover, when the terminal monitors the PDCCH according to the first search space group with the relatively small monitoring period, Downlink data can be quickly scheduled to reduce user waiting time.
  • the first search space group and the second search space group include any type of search space, for example, in the first search space group and the second search space group Can include UESS and CSS.
  • a user may use the terminal in FIG. 1 to watch a video.
  • the terminal needs to buffer data for a period of time in advance.
  • Figure 5(a) it is a schematic diagram of the interface of the terminal during video buffering.
  • the terminal since a large amount of data needs to be transmitted, it is better for the terminal to use the first search space group with a relatively short monitoring period to monitor the PDCCH, so that the data transmission can be completed quickly and the waiting time of data buffering can be reduced.
  • the terminal After the video buffering is completed, for example, during the video playback shown in Figure 5(b), there is no data transmission temporarily. At this time, it is better for the terminal to use the second search space group with a relatively large monitoring period to monitor the PDCCH, so as to avoid Power consumption is wasted.
  • the terminal enters the "start data buffering" state from the "unbuffered data" state, that is, when the terminal needs to switch from the second search space group with a relatively large monitoring period to the first search space group with a relatively small monitoring period, it can According to the method provided by the embodiment of the present application, the switching of the search space group is realized by judging whether the terminal has received the DCI used for data scheduling.
  • FIG. 6 it is a schematic flowchart of steps of another PDCCH monitoring method provided by an embodiment of the present application.
  • the method may be applied to the terminal 102 shown in FIG. 1 , and the terminal 102 may be a terminal having the structure shown in FIG. 3 .
  • the method may include the following steps:
  • the terminal receives search space information configured by a network device, where the search space information includes information of a first search space group and a second search space group.
  • the terminal monitors the PDCCH according to the second search space group, if the terminal sends a first signal to the network device, after sending the first signal, the terminal stops according to the second search space group.
  • the search space group monitors the PDCCH, and starts to monitor the PDCCH according to the first search space group.
  • the first signal includes at least one of the following signals or channels: random access preamble code, scheduling request SR, hybrid automatic repeat Request negative acknowledgement NACK, and/or physical uplink shared channel PUSCH.
  • the network device may be a base station; the first signal may be a signal sent by the terminal to the base station. It should be noted that the first signal is only a proxy for a specific type of signal for the convenience of description, and the first signal may include one or more signals that satisfy corresponding conditions. After the terminal sends the first signal, it can switch the search space group currently monitoring the PDCCH.
  • the first signal may be a random access preamble code.
  • the terminal when the terminal is in an abnormal state, such as radio link failure, beam failure, or uplink out-of-sync, the terminal will initiate a random access procedure to restore the terminal to a normal state. At this time, in order to return to normal as quickly as possible, the terminal may switch the search space group monitoring the PDCCH.
  • an abnormal state such as radio link failure, beam failure, or uplink out-of-sync
  • the terminal needs to send a preamble code or a physical random access channel (physical random access channel, PRACH) code to the base station first when performing a recovery to normal operation. Therefore, whether the terminal sends the preamble code or the PRACH code to the base station can be used as a judgment condition. After the terminal sends the preamble code or the PRACH code to the base station, the terminal can stop monitoring the PDCCH according to the second search space group and start monitoring according to the first search space group. PDCCH.
  • PRACH physical random access channel
  • the terminal may not stop monitoring the PDCCH according to the second search space group, but simultaneously monitor the PDCCH according to the first search space group and the second search space group.
  • the terminal can also continue to monitor the PDCCH according to the first search space group.
  • the monitoring period of each search space in the first search space group may be relatively smaller than the monitoring period of each search space in the second search space group.
  • the monitoring period of all or part of the search spaces in the first search space group is smaller than the monitoring period of each search space in the second search space group. Therefore, after the terminal switches from the second search space group with a relatively large monitoring period to the first search space group with a relatively small monitoring period, and starts monitoring the PDCCH according to the first search space group, it is helpful for the terminal to quickly recover to a normal state .
  • the monitoring period of each search space in the first search space group may be relatively larger than the monitoring period of each search space in the second search space group.
  • the monitoring period of each search space in the first search space group may be the same as the monitoring period of each search space in the second search space group.
  • the embodiment of the present application does not limit the specific period of the monitoring period of each search space in the first search space group and the monitoring period of each search space in the second search space group. It will be appreciated that these periods may be configured by the base station.
  • the terminal after the terminal sends the preamble code or PRACH code to the base station, it starts to monitor the specific time of the PDCCH according to the first search space group, which may mean that the terminal is sending the preamble code or PRACH code.
  • the preset number of time slots after the code may be pre-configured according to actual needs, and the specific number of the preset number of time slots is not limited in this embodiment of the present application.
  • the above-mentioned preset number may be one. That is, in the next time slot after sending the preamble code or the PRACH code, the terminal stops monitoring the PDCCH according to the second search space group, and starts monitoring the PDCCH according to the first search space group.
  • FIG. 7 it is a schematic diagram of a time relationship of a terminal switching a search space group according to an embodiment of the present application.
  • the abscissa t represents the time sequence relationship between the time slots, wherein the time slot next to the time slot T is the time slot T+1. If the terminal sends the preamble code to the base station in the time slot T, the terminal can start monitoring the PDCCH according to the first search space group in the time slot T+1.
  • the terminal after the terminal sends the preamble code or PRACH code to the base station, the terminal starts to monitor the specific time of the PDCCH according to the first search space group.
  • the access wireless network temporarily identifies the RA-RNTI scrambled DCI, and the DCI is used for non-contention access.
  • the terminal will receive a random access response (RAR) sent by the base station, and the RAR is scheduled using DCI scrambled by RA-RNTI. Therefore, in the case of non-contention access, after the terminal receives the DCI scrambled by the RA-RNTI, it means that the terminal has successfully accessed. After this, the terminal usually starts data scheduling.
  • RAR random access response
  • the terminal when the terminal receives the DCI scrambled with RA-RNTI, if the DCI scrambled with RA-RNTI is used for non-contention access, the terminal can stop monitoring the PDCCH according to the second search space group and start monitoring the PDCCH according to the first search space The group monitors PDCCH.
  • the terminal when the terminal starts monitoring the PDCCH according to the first search space group, it may not stop monitoring the PDCCH according to the second search space group. That is, the terminal can monitor the PDCCH using the first search space group and the second search space group simultaneously.
  • the terminal when the terminal is in an abnormal state, the terminal may initiate a random access procedure to make the terminal return to normal as soon as possible. At this time, by judging whether the terminal sends the preamble code or the PRACH code, the terminal starts to monitor the PDCCH according to the first search space group with a relatively small monitoring period in the next time slot when the preamble code or the PRACH code is sent, which is helpful for the terminal Get back to normal quickly.
  • the terminal receiving the DCI scrambled by RA-RNTI sent by the base station may not indicate that the random access channel (RACH) process is connected. Enter successfully.
  • RACH random access channel
  • the terminal receiving the DCI scrambled by RA-RNTI sent by the base station may not indicate that the random access channel (RACH) process is connected. Enter successfully.
  • the PDSCH scheduled by the RA-RNTI may carry the RARs of multiple terminals
  • the PDSCH scheduled by the PDCCH currently received by the terminal may not include the RARs of the terminal.
  • the RAR is actually failed to receive, and the RACH is also unsuccessful.
  • the terminal may The switching of the search space group starts after the PDSCH scheduled by DCI). Considering the analysis time of the RAR, the terminal may start switching the search space group after a preset number of time units after receiving the RAR. For example, if the terminal currently monitors the PDCCH according to the second search space group, after the terminal sends a preamble code to the base station and receives a preset number of time units after the RAR sent by the base station, the terminal switches the search space group, and starts according to The first search space group monitors the PDCCH.
  • the monitoring period of some or all of the search spaces in the second search space group is greater than the monitoring period of some or all of the search spaces in the first search space group.
  • the specific number of the above-mentioned time units may be preset according to actual needs, and the embodiment of the present application does not limit the number of time units.
  • the above-mentioned time unit may include orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols, time slots, milliseconds, and the like.
  • the terminal starts to switch the search space group after receiving a preset number of time units after receiving the RAR, which may refer to a preset number of time units after receiving the RAR In the first time slot after the number of time units, the terminal starts monitoring the PDCCH according to the first search space group.
  • FIG. 8 it is a schematic diagram of a non-contention-based random access process provided by an embodiment of the present application.
  • the terminal when the terminal initiates the random access procedure, it sends a first signal to the base station, and the first signal may be a preamble code or a PRACH code.
  • the base station After receiving the above-mentioned first signal, the base station returns an RAR to the terminal.
  • the terminal may switch the search space group after N time units after receiving the RAR. For example, switch from the second search space group to the first search space group, and start monitoring the PDCCH according to the first search space group. Within the above N time units, the terminal may parse the received RAR to ensure that the search space group is switched after the RAR is accurately received.
  • the base station cannot temporarily distinguish which terminal sent the received preamble code. If the terminal switches the search space group after sending the preamble code, since the base station cannot distinguish the terminal sending the preamble code, the base station will not switch the search space group synchronously at this time, which is easy to cause the switching timing between the terminal and the base station. mismatch. When the terminal starts to monitor the PDCCH according to the switched search space group, unnecessary waste of power consumption will be caused.
  • FIG. 9 it is a schematic diagram of a random access process based on contention resolution provided by an embodiment of the present application.
  • the terminal sends a first signal to the base station, and the first signal may be a preamble code or a PRACH code.
  • the base station After receiving the above-mentioned first signal, the base station returns an RAR to the terminal. Then, the terminal sends the second signal to the base station. After receiving the second signal sent by the terminal, the base station will start a random access contention resolution timer (ra-ContentionResolutionTimer).
  • the terminal will monitor the PDCCH scrambled with the C-RNTI during the running of the random access contention resolution timer. If the terminal receives the PDCCH scrambled with the C-RNTI, it means that the contention resolution of the terminal is successful. At this point, the corresponding RACH process is successfully completed.
  • the terminal may send a message to the base station that includes: After the second signal of the C-RNTI MAC CE, the search space group is switched. For example, switch from the second search space group to the first search space group, and start monitoring the PDCCH according to the first search space group.
  • CRBA contention-based random access
  • FIG. 10 it is a schematic diagram of a starting process of a random access contention resolution timer provided by an embodiment of the present application.
  • the terminal is sending the second signal to the base station, and the terminal and the base station will maintain a random access contention resolution timer respectively. Therefore, when the random access contention resolution timer is started, the terminal can switch the search space group from the second search space group to the first search space group. During the running of the random access contention resolution timer, the terminal monitors the PDCCH according to the first search space group.
  • the terminal may switch the search space group only after sending the second signal including the C-RNTI MAC CE, because at this time the base station can already identify which terminal initiates the random connection.
  • the base station and the terminal can complete the switching of the search space group synchronously, so as to ensure that the switching timing of the two is consistent, which helps to reduce the power consumption of the terminal.
  • the terminal when the terminal receives the DCI representing the arrival of the downlink service, the terminal may start monitoring the PDCCH according to the first search space group with a relatively short monitoring period. Similarly, when the uplink service arrives, there is also data to be transmitted between the terminal and the base station.
  • the first signal may also be a scheduling request SR.
  • the terminal may first send an SR to the base station. After receiving the SR, the base station will send DCI to the terminal to schedule PUSCH transmission. At this time, in order to ensure that the uplink data can be transmitted as soon as possible, after sending the SR, the terminal may monitor the PDCCH according to the first search space group with a relatively short monitoring period. Specifically, if the terminal is monitoring the PDCCH according to the second search space group when sending the SR, the terminal may stop monitoring the PDCCH according to the second search space group and start monitoring the PDCCH according to the first search space group after sending the SR.
  • the terminal may start monitoring the PDCCH according to the first search space group and the second search space group. If the terminal is monitoring the PDCCH according to the first search space group when sending the SR, the terminal may also continue to monitor the PDCCH according to the first search space group after sending the SR.
  • the terminal when the terminal sends a signal such as a preamble code or SR to the base station, it may indicate that the terminal currently needs to quickly access the base station to restore the normal state or that the terminal has uplink data arriving. Therefore, after sending the preamble code or SR, the terminal can start monitoring the PDCCH according to the first search space group with a relatively small monitoring period, so as to realize fast service recovery or fast scheduling of the above-mentioned data.
  • a semi-persistent scheduling scenario such as downlink semi-persistent scheduling (DL SPS), or a configured uplink grant (configured UL grant), such as configured type 1 or type 2
  • DL SPS downlink semi-persistent scheduling
  • UL grant configured uplink grant
  • the terminal can receive PDSCH or send PUSCH according to a certain period.
  • relevant parameters can be configured through RRC signaling.
  • the terminal can start to periodically receive PDSCH for DL SPS or periodically send PUSCH. It can be seen that after the base station sends the activated DCI (the activated DCI indicates the time-frequency resource of the first PDSCH/PUSCH), it no longer needs to send new scheduling DCI, and the terminal can send and receive data on the semi-statically configured resources.
  • the base station can release semi-static resources of DL SPS or configured UL grant Type 2 by sending DCI.
  • the terminal may stop receiving PDSCH for DL SPS or stop sending semi-static PUSCH.
  • the terminal may stop receiving PDSCH for DL SPS or stop sending semi-static PUSCH.
  • activation or release of semi-static PUSCH resources is configured through RRC signaling.
  • the terminal may not be able to monitor DCI in a certain search space group with a relatively small monitoring period for a period of time, thus switching to Another search space group with a relatively large monitoring period monitors the PDCCH. For example, if the terminal cannot monitor the DCI for a period of time, the InactivityTimer will not be restarted, and after the InactivityTimer times out, the terminal will switch from the first search space group to the second search space group.
  • the discontinuous reception (DRX) retransmission timer may be triggered.
  • the DRX retransmission timer is running, there may be retransmission data, and the terminal needs to monitor the use of CS-RNTI plus scrambled PDCCH.
  • FIG. 11 it is a schematic diagram of a starting process of a discontinuous reception downlink retransmission timer (drx-RetransmissionTimerDL) provided by an embodiment of the present application.
  • HARQ hybrid automatic repeat request
  • NACK hybrid automatic repeat request
  • the terminal will start drx-RetransmissionTimerDL.
  • the terminal may listen to the PDCCH in anticipation of receiving retransmission data.
  • FIG. 12 it is a schematic diagram of a process of starting another uplink retransmission timer for discontinuous reception provided by an embodiment of the present application.
  • the terminal After the terminal sends the PUSCH, it will start drx-HARQ-RTT-TimerUL. Whenever the drx-HARQ-RTT-TimerUL times out, the terminal starts the drx-RetransmissionTimerUL. During the operation of drx-RetransmissionTimerUL, the terminal will monitor possible uplink retransmission scheduling.
  • the terminal monitors a search space group with a relatively large monitoring period, such as The second search space group may increase the retransmission scheduling delay of the terminal.
  • the terminal when the retransmission timer for discontinuous reception is running, the terminal can monitor the PDCCH according to the first search space group with a relatively small monitoring period to reduce retransmission delay and data delay.
  • the above-mentioned retransmission timer for discontinuous reception includes a downlink retransmission timer for discontinuous reception (drx-RetransmissionTimerDL) or an uplink retransmission timer for discontinuous reception (drx-RetransmissionTimerUL).
  • the terminal can The search space group is switched from a first search space group with a relatively small monitoring period to a second search space group with a relatively large monitoring period, and the PDCCH is monitored according to the second search space group to save power consumption of the terminal.
  • the base station may introduce a timer (InactivityTimer) when configuring the search space group for the terminal.
  • the terminal may monitor the PDCCH according to a search space group with a relatively small monitoring period, such as the first search space group.
  • the terminal may switch to a search space group with a relatively large monitoring period, such as the second search space group.
  • the above timer may be referred to as a first search space group timer.
  • a possible condition for triggering or restarting the first search space group timer is: the terminal monitors any DCI format in the search space of the first search space group or the search space of the second search space group.
  • the terminal may start or restart the first search space group timer when any of the following conditions are met:
  • the discontinuous reception uplink retransmission timer (drx-RetransmissionTimerUL) as an example, as shown in FIG. 13 , it is the start or restart of the first search space group timer provided by the embodiment of the present application.
  • the terminal monitors the PDCCH according to the first search space group.
  • the discontinuous reception uplink retransmission timer is started, the first search space group timer is restarted, and the terminal continues to monitor the PDCCH according to the first search space group.
  • the terminal After the uplink retransmission timer for discontinuous reception expires, if the first search space group timer is still running, the terminal will continue to monitor the PDCCH according to the first search space group until the first search space group timer expires , the terminal starts monitoring the PDCCH according to the second search space group.
  • the first search space group timer may run according to a set startup or restart mechanism. However, when any of the following conditions are met, after the timer of the first search space group expires, the terminal delays switching to the first search space group. That is, when any of the following conditions are met, after the timer of the first search space group expires, the terminal still monitors the PDCCH according to the first search space group without switching to the second search space group:
  • the terminal monitors the PDCCH according to the first search space group regardless of whether the first search space group timer expires. If the terminal does not receive the PDCCH scrambled by C-RNTI during the operation of ra-ContentionResolutionTimer, the terminal switches to the second search space group after the ra-ContentionResolutionTimer expires; otherwise, the terminal will monitor the PDCCH scrambled by C-RNTI start or restart the first search space group timer.
  • Condition 2 When the retransmission timer for discontinuous reception is running, the first search space group timer times out.
  • the terminal monitors the PDCCH according to the first search space group regardless of whether the timer of the first search space group expires. If the terminal does not receive the PDCCH for which the scheduled retransmission data is received during the running of the retransmission timer of the discontinuous reception, and does not monitor any other DCI format in each search space of the first search space group, the After the received retransmission timer times out, the terminal switches to the second search space group; otherwise, the terminal monitors the PDCCH scheduling retransmission data in each search space of the first search space group (or monitors any DCI format time) start or restart the first search space group timer.
  • FIG. 14 Exemplarily, taking the discontinuous reception uplink retransmission timer (drx-RetransmissionTimerUL) as an example, as shown in FIG. Schematic diagram of the restart process.
  • the terminal monitors the PDCCH according to the first search space group.
  • the terminal continues to monitor the PDCCH according to the first search space group.
  • the terminal will continue to monitor the PDCCH according to the first search space group.
  • the terminal starts to start according to the second search space group until the uplink retransmission timer of discontinuous reception expires. Monitor PDCCH.
  • Condition 3 After the terminal successfully receives the RAR sent by the base station, but before the newly transmitted data is received, the timer of the first search space group times out.
  • the terminal does not perform search space group switching, and still monitors the PDCCH according to the first search space group. After receiving the PDCCH indicating newly transmitted data, the terminal starts or restarts the first search space group timer.
  • the configurations of the first search space group and the second search space group in S401 and S601 have a nested relationship.
  • the base station when configuring the first configuration parameter of the first search space group and the second configuration parameter of the second search space group for the terminal, may limit the values of the first configuration parameter and the second configuration parameter, whereby, the parameter related to time domain monitoring in the second configuration parameter is a subset of the parameter related to time domain monitoring in the first configuration parameter; and/or, the parameter related to frequency domain monitoring in the second configuration parameter is the first configuration parameter. A subset of configuration parameters that are related to frequency domain monitoring.
  • the base station can limit the values of the first configuration parameter and the second configuration parameter, so that the time domain monitoring positions of the second search space group are a subset of the time domain monitoring positions of the first search space group; and /or, the frequency domain monitoring positions of the second search space group are a subset of the frequency domain monitoring positions of the first search space group.
  • the parameters related to time domain monitoring in the first configuration parameters include the monitoring period of the first search space group
  • the parameters related to time domain monitoring in the second configuration parameters include the first 2.
  • the monitoring period of the search space group. Therefore, the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, which may refer to: the monitoring period of the second search space group is the same as that of the first search space group. Integer multiple of the monitoring period.
  • the monitoring period of the second search space group is an integer multiple of the monitoring period of the first search space group, which can be understood as the monitoring period of a search space included in the second search space group is a search space included in the first search space group. An integer multiple of the monitoring period.
  • the monitoring period of each search space included in the second search space group is an integer multiple of the monitoring period of a certain search space included in the first search space group.
  • the first search space group includes a first search space and a second search space
  • the second search space group includes a third search space, a fourth search space, and a fifth search space.
  • the monitoring periods of the first search space and the second search space may be 3 time slots and 4 time slots, respectively.
  • the monitoring periods of the third search space, the fourth search space and the fifth search space may be 6 time slots, 9 time slots and 12 time slots, respectively.
  • the monitoring period of each search space (the third search space, the fourth search space and the fifth search space) in the second search space group is a certain search space (the third search space) in the first search space group an integer multiple of the monitoring period of a search space).
  • the monitoring period of some search spaces is an integer of the monitoring period of a certain search space in the first search space group times.
  • the first search space group includes a first search space and a second search space
  • the second search space group includes a third search space, a fourth search space, and a fifth search space.
  • the monitoring periods of the first search space and the second search space may be 3 time slots and 4 time slots, respectively.
  • the monitoring periods of the third search space, the fourth search space and the fifth search space may be 6 time slots, 9 time slots and 10 time slots, respectively.
  • the monitoring period of part of the search spaces (the third search space and the fourth search space) in the second search space group is the monitoring period of a certain search space (the first search space) in the first search space group integer multiples of .
  • the monitoring period of the search space included in the second search space group can be configured as 5 time slots (slots), and the first search space group
  • the monitoring period of the search space included in the search space is configured as 1 slot; or, the monitoring period of the search space included in the second search space group is configured as 6 slots, and the monitoring period of the search space included in the first search space group is configured as 6 slots. Configured as 2 slots.
  • the monitoring time slot set obtained by the terminal according to the monitoring period of the first search space group belongs to A subset of the set of monitoring time slots obtained according to the monitoring period of the second search space group.
  • the terminal when the time slots of the base station and the terminal are not aligned due to some error conditions (for example, in the aforementioned embodiment S502, after sending the SR, the terminal starts to monitor the PDCCH according to the first search space group, but the base station may fail to After receiving the SR sent by the terminal, the base station may consider that the terminal is still using the second search space group to monitor the PDCCH), and the scheduling information sent by the base station may be received by the terminal.
  • some error conditions for example, in the aforementioned embodiment S502
  • the base station may fail to After receiving the SR sent by the terminal, the base station may consider that the terminal is still using the second search space group to monitor the PDCCH), and the scheduling information sent by the base station may be received by the terminal.
  • the parameters related to time domain monitoring in the first configuration parameter include a monitoring symbol set of the first search space group, and the parameters related to time domain monitoring in the second configuration parameter A set of monitoring symbols including a second search space group. Therefore, the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, which may refer to: the monitoring symbol set of the second search space group is the first search space group A subset of the monitoring symbols collection.
  • the monitoring symbol set of the second search space group is a subset of the monitoring symbol set of the first search space group, which can be understood as the monitoring symbol set of a search space included in the second search space group is the first search space group.
  • the monitoring symbol set of each search space may be determined according to the duration and monitoringSymbolsWithinSlot of the CORESET associated with the search space. Therefore, when configuring parameters for the first search space group and the second search space group, the base station may configure the monitoring period of the search space included in the second search space group to be an integer multiple of the monitoring period of the first search space group.
  • the set of symbols to be monitored determined according to the duration of CORESET and monitoringSymbolsWithinSlot in the search space included in the second search space group is configured to be monitored according to the duration of CORESET and monitoringSymbolsWithinSlot in the search space included in the first search space group. A subset of the symbol collection.
  • the parameters related to frequency domain monitoring in the first configuration parameters include a set of frequency domain monitoring positions in the first search space group, and the parameters related to frequency domain monitoring in the second configuration parameters
  • the parameters include a set of frequency domain monitoring locations for the second search space group. Therefore, the parameters related to frequency domain monitoring in the second configuration parameters are a subset of the parameters related to frequency domain monitoring in the first configuration parameters, which may refer to: the set of frequency domain monitoring positions in the second search space group is the first search space group. A subset of the set of frequency domain monitoring locations for the spatial group.
  • the frequency domain monitoring position set of the second search space group is a subset of the frequency domain monitoring position set of the first search space group, which can be understood as the frequency domain monitoring position set of a search space included in the second search space group.
  • a search space group contains a subset of a search space's set of frequency domain monitoring locations.
  • the frequency domain monitoring location set of each search space group may refer to the number of PDCCH candidate locations (nrofCandidates) that need to be blindly detected for each aggregation level, that is, the value of aggregationLevelx.
  • the number of blindly detected PDCCH candidate positions can achieve the following purpose: the frequency domain monitoring position set obtained by the terminal according to the second search space group belongs to a subset of the frequency domain monitoring position set obtained according to the first search space group.
  • the CORESET associated with the second search space group may be constrained to be the same as the CORESET associated with the first search space group. Alternatively, it can be expressed that the CORESET associated with one search space included in the second search space group is the same as the CORESET associated with one search space included in the first search space group.
  • the monitoring positions of the second search space group can all belong to the first The monitoring position of the search space group can be avoided to avoid scheduling loss when the time slots of the base station and the terminal are not aligned, ensure that the scheduling information sent by the base station or the terminal can be successfully received by the other party, and improve the success rate of scheduling information transmission.
  • the base station may pre-configure two search space groups for the terminal: group 0 and group 1; where group 0 may be the first search space group in the foregoing embodiments, and group 1 may be the first search space group in the foregoing embodiments
  • the monitoring period of group 0 is smaller than the monitoring period of group 1.
  • the search spaces included in group 0 and group 1 belong to the user equipment specific search space UESS, and the terminal also needs to monitor the PDCCH in the common search space CSS.
  • the terminal monitors the PDCCH according to group 1, if the target DCI is received, the terminal switches from group 1 to group 0, and starts to monitor the PDCCH according to group 0; wherein, the target DCI needs to meet at least one of the following conditions:
  • the target DCI is a DCI scrambled with C-RNTI, MCS-C-RNTI, or CS-RNTI; or,
  • the target DCI is the DCI scrambled using C-RNTI, MCS-C-RNTI or CS-RNTI in UESS; or,
  • the target DCI is the DCI scrambled using C-RNTI, MCS-C-RNTI or CS-RNTI in UESS or CSS type 3.
  • scheduling DCI corresponds to DCI scrambled using C-RNTI, MCS-C-RNTI or CS-RNTI.
  • the terminal can monitor DCI scrambled with C-RNTI, MCS-C-RNTI or CS-RNTI in UESS and CSS type 3. Therefore, the above-mentioned DCI scrambled with C-RNTI, MCS-C-RNTI or CS-RNTI may be the DCI monitored in UESS or CSS type 3.
  • the terminal Since the terminal will always monitor CSS except for UESS. Therefore, it is also possible to judge the search space where the DCI scrambled by the above-mentioned C-RNTI, MCS-C-RNTI or CS-RNTI is monitored. For example, the terminal switches from search space group 1 to search space group 0 only when DCI scrambled with C-RNTI, MCS-C-RNTI or CS-RNTI is monitored in the UESS. When DCI scrambled with C-RNTI, MCS-C-RNTI or CS-RNTI is detected in the CSS, the terminal does not switch search space groups. In this way, the size of the data volume can be adapted more flexibly.
  • the terminal when a terminal has a large amount of data arriving, the terminal is scheduled in the UESS, and then the terminal switches from search space group 1 to search space group 0, so as to quickly perform data scheduling. If the terminal only has a small amount of data arriving, the terminal can be scheduled in the CSS. After the terminal completes data transmission, it can still monitor the PDCCH according to search space group 1 (with a larger monitoring period), thereby reducing terminal power consumption and signaling overhead. It can be understood that the embodiments of the present application do not limit the monitoring periods of the search space group 1 and the search space group 0, and the relationship between them.
  • the terminal monitors the PDCCH according to the search space group 1, if the terminal sends the PRACH, the terminal can switch from the search space group 1 to the search space group 0.
  • a possible reason for switching from search space group 1 to search space group 0 is that when some abnormal states occur on the terminal, The terminal should switch to a smaller monitoring period to monitor the PDCCH for quick recovery.
  • Abnormal states may include: radio link failure, beam failure, or uplink out-of-sync.
  • the terminal will initiate a random access procedure to return to normal.
  • the priority of restoring to normal state should be higher than energy saving. Therefore, the terminal should switch back to search space group 0.
  • the first step of the above abnormal state recovery is that the terminal sends a PRACH to the base station. Therefore, PRACH can be used as a possible judgment condition, and the terminal switches back to search space group 0 under this condition.
  • the specific time at which the terminal starts monitoring the PDCCH according to search space group 0 can be further refined.
  • the terminal After the terminal has sent the PRACH, it will receive the RAR sent by the base station, and the RAR is scheduled using the DCI scrambled by the RA-RNTI.
  • the terminal In the case of non-contention access, after the terminal receives the DCI scrambled by the RA-RNTI, it indicates that the terminal has successfully accessed. After that, the terminal generally starts data scheduling.
  • the DCI scrambled by RA-RNTI is not affected by the switching of search space group 0 or search space group 1 in CSS type 1. Therefore, the terminal may switch back to search space group 0 after receiving the RA-RNTI scrambled DCI. It can be understood that the embodiments of the present application do not limit the monitoring periods of the search space group 1 and the search space group 0, and the relationship between them.
  • the terminal may switch the search space group and start monitoring the PDCCH according to search space group 0 after N time units after receiving the RAR; or, the terminal may be after N time units after receiving the RAR Switch the search space group in the first time slot of , and start monitoring the PDCCH according to the search space group 0. It can be understood that the embodiments of the present application do not limit the monitoring periods of the search space group 1 and the search space group 0, and the relationship between them.
  • the terminal switches from the search space group 1 to the search space group 0 after sending the PRACH (the first signal).
  • the terminal for the RACH process based on contention resolution in the RRC connected state, on the basis of the second example, another condition for triggering the terminal to switch the search space group is added. That is, after sending the second signal to the base station, the terminal switches from search space group 1 to search space group 0.
  • the process in which the terminal sends the second signal to the base station may refer to the process in which the terminal sends the signal to the base station after the terminal sends the first signal to the base station and receives the RAR returned by the base station for the first signal.
  • the terminal when the terminal initiates a contention resolution-based RACH procedure (CBRA, that is, the second signal includes the C-RNTI MAC CE) in the RRC connected state, it may be that a beam failure has occurred, and the terminal requests beam failure recovery (BFR). ), or the terminal requests uplink resource scheduling, or the terminal receives a PDCCH order (PDCCH order) from the base station.
  • CBRA contention resolution-based RACH procedure
  • BFR beam failure recovery
  • PDCCH order PDCCH order
  • the terminal sends the second signal Afterwards, it is possible to switch to the search space group 0 with a relatively small monitoring period to monitor the PDCCH.
  • the terminal may switch to search space group 0 to monitor the PDCCH. It can be understood that the embodiments of the present application do not limit the monitoring periods of the search space group 1 and the search space group 0, and the relationship between them.
  • the terminal monitors the PDCCH according to search space group 1, if the terminal sends PRACH or SR, the terminal can switch from search space group 1 to search space group 0.
  • the specific time at which the terminal starts monitoring the PDCCH according to search space group 0 can be further refined. For example, monitoring of PDCCH according to search space group 0 starts at the next time slot when the terminal transmits PRACH or SR.
  • Example 1 is aimed at the situation where downlink data arrives.
  • the terminal should also switch from a search space group with a large monitoring period to a search space group with a small monitoring period, so as to quickly perform data scheduling.
  • the methods for the terminal to request uplink resources may include the following two methods: the terminal sends an SR; or, the terminal sends a PRACH. Therefore, in this example, both can be used as conditions for the terminal to switch from search space group 1 back to search space group 0. It can be understood that the embodiments of the present application do not limit the monitoring periods of the search space group 1 and the search space group 0, and the relationship between them.
  • the base station When the base station configures the search space group for the terminal, it can configure a timer SSSG0-InactivityTimer for the search space group 0.
  • the terminal monitors the PDCCH according to the search space group 0; when the timer expires, the terminal switches to Search space group 1 uses a search space group with a relatively large monitoring period to monitor the PDCCH.
  • the start of the DRX retransmission timer may be triggered.
  • the DRX retransmission timer is running, there may be retransmission data, and the terminal needs to monitor and use CS-RNTI. scrambled PDCCH.
  • the corresponding retransmission timer is running, if the terminal monitors the PDCCH according to the search space group 1 with a relatively large monitoring period, the retransmission scheduling delay may be increased.
  • the terminal when the retransmission timer is running, the terminal can switch to the search space group 0 with a relatively small monitoring period to monitor the PDCCH, so as to reduce the data delay; If no DCI is detected in space group 0, after the above retransmission timer expires, the terminal can switch the search space group from search space group 0 with a relatively small monitoring period to a search space with a relatively large monitoring period Group 1, monitor the PDCCH according to the search space group 1, so as to save the power consumption of the terminal. It can be understood that the embodiments of the present application do not limit the monitoring periods of the search space group 1 and the search space group 0, and the relationship between them.
  • the base station when configuring the search space group for the terminal, may also limit the value of the configuration parameters of the search space group, so that the configuration parameters of the search space group 0 and the search space group 1 have a nested relationship , so that the monitoring positions of search space group 1 all belong to the monitoring positions of search space group 0. That is, the monitoring positions of search space group 1 are a subset of the monitoring positions of search space group 0 .
  • the scheduling information sent by the base station can also be received by the terminal.
  • the monitoring period of the search space in group 1 can be configured as 5 time slots (slot), and the monitoring period of the search space in group 0 can be configured as 1 slot;
  • the monitoring period of the search space in group 0 is configured as 6 slots, and the monitoring period of the search space in group 0 is configured as 2 slots.
  • the monitoring period of the search space in group 1 is an integer multiple of the monitoring period of the search space in group 0, so that the monitoring time slot set obtained by the terminal according to the monitoring period of group 1 belongs to the monitoring period obtained according to the monitoring period of group 0 A subset of the set of time slots.
  • the set of symbols to be monitored in group 1 may also be configured as a subset of the set of symbols to be monitored in group 0.
  • the CORESETs associated with the search spaces included in group 0 and group 1 can be configured to be the same, and at the same time, the PDCCHs that require blind detection for each aggregation level of the search space in group 1 with a relatively large monitoring period can be configured.
  • the number of candidate locations is configured to be greater than or equal to the number of PDCCH candidate locations for which blind detection is required for each aggregation level of the search space in group 0 with a relatively small monitoring period.
  • the frequency domain monitoring position set obtained by the terminal according to group 1 belongs to a subset of the frequency domain monitoring position set obtained according to group 0 .
  • each network element such as a terminal and a network device, in order to implement the above functions, it includes a corresponding hardware structure or software module for performing each function, or a combination of the two.
  • the present application can be implemented in hardware, or in the form of a combination of hardware and computer software, in conjunction with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • the terminal can be divided into functional modules according to the foregoing method examples.
  • each functional module can be divided corresponding to each function, or one or more functions can be integrated into one functional module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.
  • the following is an example of integrating one or more functions into one function module:
  • FIG. 15 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application.
  • the communication device includes a communication module 1501 and a processing module 1502 .
  • the communication device can implement at least one of the following solutions:
  • the communication module 1501 is configured to receive search space information configured by a network device, where the search space information includes information of a first search space group and a second search space group.
  • the processing module 1502 is configured to, when the terminal monitors the PDCCH according to the second search space group, if the terminal receives downlink control information DCI for data scheduling, stop monitoring the PDCCH according to the second search space group, and start to monitor the PDCCH according to the first search space group Monitor PDCCH.
  • the downlink control information DCI used for data scheduling includes DCI scrambled using any one of the following RNTIs:
  • the cell radio network temporary identifier C-RNTI, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI is not limited to, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI.
  • the downlink control information DCI used for data scheduling is the DCI in the user equipment specific search space UESS or the DCI in the third type common search space CSS type 3.
  • the first search space group has a first configuration parameter
  • the second search space group has a second configuration parameter
  • the parameters related to the time domain monitoring in the second configuration parameter are the time and time in the first configuration parameter.
  • a subset of parameters related to domain monitoring; and/or, the parameters related to frequency domain monitoring in the second configuration parameters are a subset of parameters related to frequency domain monitoring in the first configuration parameters.
  • the parameters related to time domain monitoring in the first configuration parameter include the monitoring period of the first search space group
  • the parameters related to time domain monitoring in the second configuration parameter include the monitoring of the second search space group. period; correspondingly, the parameter related to time domain monitoring in the second configuration parameter is a subset of the parameter related to time domain monitoring in the first configuration parameter, which may be: the monitoring period of the second search space group is the first search space Integer multiple of the monitoring period of the group.
  • the parameters related to time domain monitoring in the first configuration parameter include the monitoring symbol set of the first search space group
  • the parameters related to time domain monitoring in the second configuration parameter include the parameters of the second search space group.
  • a set of monitoring symbols correspondingly, the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, which may be: the set of monitoring symbols in the second search space group is the first A subset of the set of monitoring symbols for a search space group.
  • the parameters related to frequency domain monitoring in the first configuration parameters include a set of frequency domain monitoring positions in the first search space group
  • the parameters related to frequency domain monitoring in the second configuration parameters include the second search space.
  • the parameters related to frequency domain monitoring in the second configuration parameter are a subset of the parameters related to frequency domain monitoring in the first configuration parameter, which may be: the frequency domain of the second search space group
  • the set of domain monitoring positions is a subset of the set of frequency domain monitoring positions of the first search space group.
  • the related information of the downlink control information DCI, the first configuration parameter, and the second configuration parameter used for data scheduling may refer to the embodiment shown in FIG. 4 , which will not be repeated here.
  • the communication module 1501 is configured to receive the search space information configured by the network device, and the search space information includes the information of the first search space group and the second search space group;
  • the processing module 1502 is configured to, when the terminal monitors the PDCCH according to the second search space group, if the terminal sends the first signal to the network device, after sending the first signal, stop monitoring the PDCCH according to the second search space group, and start searching according to the first search space group.
  • the space group monitors the PDCCH, and the first signal includes at least one of the following signals or channels: random access preamble, scheduling request SR, hybrid automatic repeat request negative acknowledgement NACK, and/or physical uplink shared channel PUSCH.
  • the processing module 1502 is configured to stop monitoring the PDCCH according to the second search space group and start monitoring the PDCCH according to the first search space group in the next time slot after the terminal sends the preamble code.
  • the processing module 1502 is configured to receive the DCI scrambled using the random access wireless network temporary identifier RA-RNTI at the terminal; if the preamble code is used for non-contention access, stop searching according to the second The space group monitors the PDCCH, and starts monitoring the PDCCH according to the first search space group.
  • the processing module 1502 is configured to receive the random access response RAR returned by the network device for the first signal at the terminal; Monitor the PDCCH, and start monitoring the PDCCH according to the first search space group.
  • the processing module 1502 is configured to, after the terminal receives a preset number of time units after the DCI scrambled by using the RA-RNTI, or, after the terminal receives the network device returns a response to the first signal. After a preset number of time units after the random access response RAR, the monitoring of the PDCCH according to the second search space group is stopped, and the monitoring of the PDCCH according to the first search space group is started.
  • time unit includes any one of the following:
  • the processing module 1502 is used for the first time slot after the terminal receives a preset number of time units after the DCI scrambled by the RA-RNTI, or, when the terminal receives the network
  • the device stops monitoring the PDCCH according to the second search space group, and starts monitoring the PDCCH according to the first search space group.
  • the processing module 1502 is configured to send the second signal to the network device after the terminal receives the random access response RAR returned by the network device for the first signal; if the preamble code is used for competing access , and the second signal includes the C-RNTI MAC control element, after the terminal sends the second signal, it stops monitoring the PDCCH according to the second search space group, and starts monitoring the PDCCH according to the first search space group.
  • the processing module 1502 is configured to stop monitoring the PDCCH according to the second search space group when the random access contention resolution timer is running after the terminal sends the second signal, and start to monitor the PDCCH according to the first search space group. Monitor PDCCH.
  • the processing module 1502 is configured to stop monitoring the PDCCH according to the second search space group and start monitoring the PDCCH according to the first search space group when the retransmission timer is running; Downlink retransmission timer for continuous reception or uplink retransmission timer for discontinuous reception.
  • the first search space group has a first configuration parameter
  • the second search space group has a second configuration parameter
  • the parameters related to the time domain monitoring in the second configuration parameter are the time and time in the first configuration parameter.
  • a subset of parameters related to domain monitoring; and/or, the parameters related to frequency domain monitoring in the second configuration parameters are a subset of parameters related to frequency domain monitoring in the first configuration parameters.
  • the parameters related to time domain monitoring in the first configuration parameter include the monitoring period of the first search space group
  • the parameters related to time domain monitoring in the second configuration parameter include the monitoring of the second search space group. period; correspondingly, the parameter related to time domain monitoring in the second configuration parameter is a subset of the parameter related to time domain monitoring in the first configuration parameter, which may be: the monitoring period of the second search space group is the first search space Integer multiple of the monitoring period of the group.
  • the parameters related to time domain monitoring in the first configuration parameter include the monitoring symbol set of the first search space group
  • the parameters related to time domain monitoring in the second configuration parameter include the parameters of the second search space group.
  • a set of monitoring symbols correspondingly, the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, which may be: the set of monitoring symbols in the second search space group is the first A subset of the set of monitoring symbols for a search space group.
  • the parameters related to frequency domain monitoring in the first configuration parameters include a set of frequency domain monitoring positions in the first search space group
  • the parameters related to frequency domain monitoring in the second configuration parameters include the second search space.
  • the parameters related to frequency domain monitoring in the second configuration parameter are a subset of the parameters related to frequency domain monitoring in the first configuration parameter, which may be: the frequency domain of the second search space group
  • the set of domain monitoring positions is a subset of the set of frequency domain monitoring positions of the first search space group.
  • the first signal the second signal, the first configuration parameter, and the related information of the second configuration parameter
  • the communication module 1501 in FIG. 15 may be implemented by the communication interface 304 in FIG. 3
  • the processing module 1502 in FIG. 15 may be implemented by the processor 301 in FIG. 3
  • This embodiment of the present application does not make any limitation on this.
  • Embodiments of the present application further provide a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium; when the computer-readable storage medium runs on a communication device, the communication device is made to execute as shown in FIG. 4 . Or the method shown in Figure 6.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.).
  • wire eg, coaxial cable, optical fiber, digital subscriber line, DSL
  • wireless eg, infrared, wireless, microwave, etc.
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or data storage devices including one or more servers, data centers, etc. that can be integrated with the medium.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media, or semiconductor media (eg, solid state disks (SSDs)), and the like.
  • Embodiments of the present application also provide a computer program product containing computer instructions, which, when running on a terminal, enables the terminal to execute the method shown in FIG. 4 or FIG. 6 .
  • An embodiment of the present application further provides a communication system, where the communication system includes a network device and a terminal, where the terminal is configured to execute the method shown in FIG. 4 or FIG. 6 .
  • FIG. 16 is a schematic structural diagram of a chip provided by an embodiment of the present application.
  • the chip shown in FIG. 16 may be a general-purpose processor or a special-purpose processor.
  • the chip includes a processor 1601 .
  • the processor 1601 is configured to support the communication device to execute the method shown in FIG. 4 or FIG. 6 .
  • the chip further includes a transceiver 1602, and the transceiver 1602 is configured to accept the control of the processor 1601, and is configured to support the communication apparatus to execute the method shown in FIG. 4 or FIG. 6 .
  • the chip shown in FIG. 16 may further include: a storage medium 1603 .
  • the chip shown in FIG. 16 can be implemented by using the following circuits or devices: one or more field programmable gate arrays (FPGA), programmable logic device (PLD) , controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.
  • FPGA field programmable gate arrays
  • PLD programmable logic device
  • controllers state machines
  • gate logic discrete hardware components
  • discrete hardware components any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.
  • the terminals, network devices, computer storage media, computer program products, and chips provided by the above embodiments of the present application are all used to execute the methods provided above. Therefore, the beneficial effects that can be achieved may refer to the corresponding methods provided above. The beneficial effects will not be repeated here.
  • Embodiment 1 a physical downlink control channel PDCCH monitoring method, wherein the method is applied to a terminal, and the method includes:
  • the terminal receives search space information configured by the network device, where the search space information includes information of a first search space group and a second search space group;
  • the terminal monitors the PDCCH according to the second search space group, if the terminal receives downlink control information DCI for data scheduling, the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group.
  • Embodiment 2 The method according to Embodiment 1, wherein the downlink control information DCI used for data scheduling includes DCI scrambled by using any one of the following wireless network temporary identifiers RNTI:
  • the cell radio network temporary identifier C-RNTI, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI is not limited to, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI.
  • Embodiment 3 The method according to Embodiment 2, wherein the downlink control information DCI used for data scheduling is the DCI in the user equipment specific search space UESS or the DCI in the third type common search space CSS type 3.
  • Embodiment 4 The method according to any one of Embodiment 1 to Embodiment 3, wherein the first search space group has a first configuration parameter, and the second search space group has a second configuration parameter;
  • the parameters related to the time domain monitoring are a subset of the parameters related to the time domain monitoring in the first configuration parameter; and/or, the parameters related to the frequency domain monitoring in the second configuration parameter are the first configuration parameters related to the frequency domain monitoring.
  • Embodiment 5 The method according to Embodiment 4, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring period of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters include The monitoring period of the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring period of the second search space group is the monitoring period of the first search space group an integer multiple of the period.
  • Embodiment 6 The method according to Embodiment 4, wherein the parameters related to time domain monitoring in the first configuration parameter include a monitoring symbol set of the first search space group, and the parameters related to time domain monitoring in the second configuration parameter A set of monitoring symbols including a second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring symbol set of the second search space group is a set of monitoring symbols of the first search space group. Monitors a subset of the symbol set.
  • Embodiment 7 The method according to Embodiment 4, wherein the parameters related to frequency domain monitoring in the first configuration parameters include a set of frequency domain monitoring positions of the first search space group, and the second configuration parameters are related to frequency domain monitoring.
  • the parameters of include a set of frequency-domain monitoring locations for the second search space group.
  • the parameter related to frequency domain monitoring in the second configuration parameter is a subset of the parameter related to frequency domain monitoring in the first configuration parameter, including: the set of frequency domain monitoring positions of the second search space group is the first search space A subset of the set of frequency domain monitoring locations for the group.
  • Embodiment 8 A communication device, wherein the communication device may be a terminal or a chip or a system-on-chip in the terminal, the communication device includes: a processor and a memory, and the memory stores an instruction, and when the instruction is executed by the processor, the The communication apparatus performs the following steps: receiving the search space information configured by the network equipment, the search space information includes the information of the first search space group and the second search space group; when the terminal monitors the PDCCH according to the second search space group, if the terminal receives the According to the downlink control information DCI of the data scheduling, the monitoring of the PDCCH according to the second search space group is stopped, and the monitoring of the PDCCH according to the first search space group is started.
  • Embodiment 9 The communication device according to Embodiment 8, wherein the downlink control information DCI used for data scheduling includes DCI scrambled by using any one of the following wireless network temporary identifiers RNTI:
  • the cell radio network temporary identifier C-RNTI, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI is not limited to, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI.
  • Embodiment 10 The communication apparatus according to Embodiment 9, wherein the downlink control information DCI used for data scheduling is the DCI in the user equipment specific search space UESS or the DCI in the third type common search space CSS type 3.
  • Embodiment 11 The communication device according to any one of Embodiments 8 to 10, wherein the first search space group has a first configuration parameter, the second search space group has a second configuration parameter; the second configuration parameter
  • the parameters related to time domain monitoring in the first configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameter; and/or, the parameters related to frequency domain monitoring in the second configuration parameters are the first configuration parameters related to frequency domain monitoring. Monitor a subset of relevant parameters.
  • Embodiment 12 The communication device according to Embodiment 11, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring period of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters Include the monitoring period of the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring period of the second search space group is the monitoring period of the first search space group an integer multiple of the period.
  • Embodiment 13 The communication device according to Embodiment 11, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring symbol set of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters The parameters include the set of monitoring symbols for the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring symbol set of the second search space group is a set of monitoring symbols of the first search space group. Monitors a subset of the symbol set.
  • Embodiment 14 The communication device according to Embodiment 11, wherein the parameters related to frequency domain monitoring in the first configuration parameter include a frequency domain monitoring location set of the first search space group, and the second configuration parameter is related to frequency domain monitoring. Relevant parameters include a set of frequency domain monitoring locations for the second search space group.
  • the parameter related to frequency domain monitoring in the second configuration parameter is a subset of the parameter related to frequency domain monitoring in the first configuration parameter, including: the set of frequency domain monitoring positions of the second search space group is the first search space A subset of the set of frequency domain monitoring locations for the group.
  • Embodiment 15 A communication device, wherein the communication device comprises: a communication module and a processing module.
  • the communication module is configured to receive search space information configured by a network device, where the search space information includes information of a first search space group and a second search space group.
  • the processing module is configured to stop monitoring the PDCCH according to the second search space group and start monitoring according to the first search space group if the terminal receives downlink control information DCI for data scheduling when the terminal monitors the PDCCH according to the second search space group PDCCH.
  • Embodiment 16 The communication apparatus according to Embodiment 15, wherein the downlink control information DCI used for data scheduling includes DCI scrambled by using any one of the following wireless network temporary identifiers RNTI:
  • the cell radio network temporary identifier C-RNTI, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI is not limited to, the modulation and coding strategy radio network temporary identifier MCS-C-RNTI, or the configuration scheduling radio network temporary identifier CS-RNTI.
  • Embodiment 17 The communication apparatus according to Embodiment 16, wherein the downlink control information DCI used for data scheduling is the DCI in the user equipment specific search space UESS or the DCI in the third type common search space CSS type 3.
  • Embodiment 18 The communication device according to any one of Embodiment 15 to Embodiment 17, wherein the first search space group has a first configuration parameter, the second search space group has a second configuration parameter; the second configuration parameter
  • the parameters related to time domain monitoring in the first configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameter; and/or, the parameters related to frequency domain monitoring in the second configuration parameters are the first configuration parameters related to frequency domain monitoring. Monitor a subset of relevant parameters.
  • Embodiment 19 The communication device according to Embodiment 18, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring period of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters Include the monitoring period of the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring period of the second search space group is the monitoring period of the first search space group an integer multiple of the period.
  • Embodiment 20 The communication device according to Embodiment 18, wherein the parameters related to time domain monitoring in the first configuration parameter include a monitoring symbol set of the first search space group, and the parameters related to time domain monitoring in the second configuration parameter The parameters include the set of monitoring symbols for the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring symbol set of the second search space group is a set of monitoring symbols of the first search space group. Monitors a subset of the symbol set.
  • Embodiment 21 The communication device according to Embodiment 18, wherein the parameters related to frequency domain monitoring in the first configuration parameter include a frequency domain monitoring location set of the first search space group, and the second configuration parameter is related to frequency domain monitoring. Relevant parameters include a set of frequency domain monitoring locations for the second search space group.
  • the parameter related to frequency domain monitoring in the second configuration parameter is a subset of the parameter related to frequency domain monitoring in the first configuration parameter, including: the set of frequency domain monitoring positions of the second search space group is the first search space A subset of the set of frequency domain monitoring locations for the group.
  • Embodiment 22 a method for monitoring a physical downlink control channel PDCCH, wherein the method is applied to a terminal, and the method includes:
  • the terminal receives search space information configured by the network device, where the search space information includes information of a first search space group and a second search space group;
  • the terminal monitors the PDCCH according to the second search space group, if the terminal sends the first signal to the network device, after sending the first signal, the terminal stops monitoring the PDCCH according to the second search space group, and starts monitoring the PDCCH according to the first search space group,
  • the first signal includes at least one of the following signals or channels: random access preamble, scheduling request SR, hybrid automatic repeat request negative acknowledgement NACK, and/or physical uplink shared channel PUSCH.
  • Embodiment 23 The method according to Embodiment 22, wherein after sending the first signal, the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group, including:
  • the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group.
  • Embodiment 24 The method according to Embodiment 22, wherein after sending the first signal, the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group, including:
  • the terminal receives the DCI scrambled using the random access wireless network temporary identity RA-RNTI;
  • the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group.
  • Embodiment 25 The method according to Embodiment 22, wherein after sending the first signal, the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group, including:
  • the terminal receives the random access response RAR returned by the network device for the first signal
  • the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group.
  • Embodiment 26 The method according to Embodiment 24 or Embodiment 25, wherein the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group, including:
  • the terminal After the terminal receives a preset number of time units after the DCI scrambled with the RA-RNTI, or, after the terminal receives a preset number of time units after the random access response RAR returned by the network device for the first signal
  • the terminal stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the first search space group.
  • Embodiment 27 The method according to Embodiment 26, wherein the time unit includes any one of the following: an orthogonal frequency division multiplexing OFDM symbol, a time slot, or a millisecond.
  • Embodiment 28 The method according to Embodiment 26, wherein after the terminal receives a preset number of time units after the DCI scrambled by using the RA-RNTI, or, after the terminal receives the network device for the first signal After a preset number of time units after the returned random access response RAR, stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the first search space group, including:
  • the first time slot after the terminal receives a preset number of time units after the DCI scrambled by using the RA-RNTI, or the first time slot after the terminal receives the random access response RAR returned by the network device for the first signal.
  • the monitoring of the PDCCH according to the second search space group is stopped, and the monitoring of the PDCCH according to the first search space group is started.
  • Embodiment 29 The method according to Embodiment 22, wherein after sending the first signal, the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group, including:
  • the terminal After receiving the random access response RAR returned by the network device for the first signal, the terminal sends the second signal to the network device;
  • the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group.
  • Embodiment 30 The method according to Embodiment 29, wherein if the preamble code is used for contention access and the second signal includes a C-RNTI MAC control element, after sending the second signal, the terminal stops searching according to the second signal.
  • the space group monitors the PDCCH, and starts monitoring the PDCCH according to the first search space group, including:
  • the terminal After sending the second signal, when the random access contention resolution timer is running, the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group.
  • Embodiment 31 The method according to Embodiment 22, wherein the terminal is configured with a retransmission timer, and after sending the first signal, the terminal stops monitoring the PDCCH according to the second search space group, and starts monitoring the PDCCH according to the first search space group ,include:
  • the terminal stops monitoring the PDCCH according to the second search space group, and starts monitoring the PDCCH according to the first search space group; wherein the retransmission timer includes the downlink retransmission timer of discontinuous reception or discontinuous reception. Received uplink retransmission timer.
  • Embodiment 32 The method according to any one of Embodiment 22 to Embodiment 25 or Embodiment 27 to Embodiment 31, wherein the first search space group has a first configuration parameter, and the second search space group has a second configuration parameters; the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters; and/or, the parameters related to frequency domain monitoring in the second configuration parameters are the A subset of configuration parameters that are related to frequency domain monitoring.
  • Embodiment 33 The method according to Embodiment 32, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring period of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters include The monitoring period of the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring period of the second search space group is the monitoring period of the first search space group an integer multiple of the period.
  • Embodiment 34 The method according to Embodiment 22, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring symbol set of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters A set of monitoring symbols including a second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring symbol set of the second search space group is a set of monitoring symbols of the first search space group. Monitors a subset of the symbol set.
  • Embodiment 35 The method according to Embodiment 34, wherein the parameters related to frequency domain monitoring in the first configuration parameters include a frequency domain monitoring location set of the first search space group, and the second configuration parameters are related to frequency domain monitoring.
  • the parameters of include a set of frequency-domain monitoring locations for the second search space group.
  • the parameter related to frequency domain monitoring in the second configuration parameter is a subset of the parameter related to frequency domain monitoring in the first configuration parameter, including: the set of frequency domain monitoring positions of the second search space group is the first search space A subset of the set of frequency domain monitoring locations for the group.
  • Embodiment 36 a communication device, wherein the communication device may be a terminal or a chip or a system-on-chip in the terminal, the communication device includes: a processor and a memory, and the memory stores an instruction, and when the instruction is executed by the processor, the instruction is executed.
  • the communication apparatus performs the following steps: receiving the search space information configured by the network equipment, the search space information includes the information of the first search space group and the second search space group; when the terminal monitors the PDCCH according to the second search space group, if the terminal sends the network equipment Send the first signal, after the terminal sends the first signal, it stops monitoring the PDCCH according to the second search space group, and starts monitoring the PDCCH according to the first search space group, and the first signal includes at least one of the following signals or channels: input preamble code, scheduling request SR, hybrid automatic repeat request negative acknowledgement NACK, and/or physical uplink shared channel PUSCH.
  • Embodiment 37 The communication device according to Embodiment 36, wherein when the instruction is executed by the processor, the communication device is caused to further perform the following step: in the next time slot after the terminal sends the preamble code, stop according to the second search space.
  • the group monitors the PDCCH, and starts monitoring the PDCCH according to the first search space group.
  • Embodiment 38 The communication apparatus according to Embodiment 36, wherein when the instruction is executed by the processor, the communication apparatus is caused to further perform the following step: the terminal receives the DCI scrambled using the random access wireless network temporary identifier RA-RNTI ; If the preamble code is used for non-contention access, stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the first search space group.
  • the terminal receives the DCI scrambled using the random access wireless network temporary identifier RA-RNTI ; If the preamble code is used for non-contention access, stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the first search space group.
  • Embodiment 39 The communication apparatus according to Embodiment 36, wherein when the instruction is executed by the processor, the communication apparatus is caused to further perform the following steps: the terminal receives a random access response RAR returned by the network device for the first signal; If the preamble code is used for non-contention access, the monitoring of the PDCCH according to the second search space group is stopped, and the monitoring of the PDCCH according to the first search space group is started.
  • Embodiment 40 The communication apparatus according to Embodiment 38 or Embodiment 39, wherein when the instruction is executed by the processor, the communication apparatus is caused to further perform the following step: after the terminal receives the DCI scrambled with the RA-RNTI After a preset number of time units, or after receiving a preset number of time units after the random access response RAR returned by the network device for the first signal, the terminal stops monitoring the PDCCH according to the second search space group, and starts The PDCCH is monitored according to the first search space group.
  • Embodiment 41 The communication apparatus according to Embodiment 40, wherein the time unit includes any one of the following: an orthogonal frequency division multiplexing OFDM symbol, a time slot, or a millisecond.
  • Embodiment 42 The communication apparatus according to Embodiment 40, wherein when the instruction is executed by the processor, the communication apparatus is caused to further perform the following step: after the terminal receives a preset number of DCIs scrambled by using the RA-RNTI The first time slot after the time unit, or the first time slot after the terminal receives a preset number of time units after the random access response RAR returned by the network device for the first signal, stops according to the first time slot.
  • the second search space group monitors the PDCCH, and starts to monitor the PDCCH according to the first search space group.
  • Embodiment 43 The communication apparatus according to Embodiment 36, wherein when the instruction is executed by the processor, the communication apparatus is caused to further perform the following step: after the terminal receives the random access response RAR returned by the network device for the first signal , send the second signal to the network device; if the preamble code is used for contention access, and the second signal includes the C-RNTI MAC control element, after sending the second signal, stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the second search space group.
  • the first search space group monitors the PDCCH.
  • Embodiment 44 The communication apparatus according to Embodiment 43, wherein, when the instruction is executed by the processor, the communication apparatus is caused to further perform the following step: after the terminal sends the second signal, when the random access contention resolution timer runs , stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the first search space group.
  • Embodiment 45 The communication apparatus according to Embodiment 36, wherein the terminal is configured with a retransmission timer, and when the instruction is executed by the processor, the communication apparatus is caused to further perform the following steps: when the retransmission timer is running, stop the retransmission timer.
  • the second search space group monitors the PDCCH, and starts to monitor the PDCCH according to the first search space group; wherein the retransmission timer includes a downlink retransmission timer for discontinuous reception or an uplink retransmission timer for discontinuous reception.
  • Embodiment 46 The communication apparatus according to any one of Embodiment 36 to Embodiment 39 or Embodiment 41 to Embodiment 45, wherein the first search space group has the first configuration parameter, and the second search space group has the first configuration parameter.
  • Two configuration parameters; the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters; and/or, the parameters related to frequency domain monitoring in the second configuration parameters are A subset of the first configuration parameters related to frequency domain monitoring.
  • Embodiment 47 The communication device according to Embodiment 46, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring period of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters Include the monitoring period of the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring period of the second search space group is the monitoring period of the first search space group an integer multiple of the period.
  • Embodiment 48 The communication device according to Embodiment 36, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring symbol set of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters The parameters include the set of monitoring symbols for the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring symbol set of the second search space group is a set of monitoring symbols of the first search space group. Monitors a subset of the symbol set.
  • Embodiment 49 The communication device according to Embodiment 48, wherein the parameters related to frequency domain monitoring in the first configuration parameter include a frequency domain monitoring location set of the first search space group, and the second configuration parameter is related to frequency domain monitoring. Relevant parameters include a set of frequency domain monitoring locations for the second search space group.
  • the parameter related to frequency domain monitoring in the second configuration parameter is a subset of the parameter related to frequency domain monitoring in the first configuration parameter, including: the set of frequency domain monitoring positions of the second search space group is the first search space A subset of the set of frequency domain monitoring locations for the group.
  • Embodiment 50 A communication device, wherein the communication device comprises: a communication module and a processing module.
  • the communication module is configured to receive search space information configured by a network device, where the search space information includes information of a first search space group and a second search space group.
  • the processing module is configured to, when the terminal monitors the PDCCH according to the second search space group, if the terminal sends the first signal to the network device, after sending the first signal, stop monitoring the PDCCH according to the second search space group, and start to monitor the PDCCH according to the first search space group
  • the group monitors the PDCCH, and the first signal includes at least one of the following signals or channels: random access preamble, scheduling request SR, hybrid automatic repeat request negative acknowledgement NACK, and/or physical uplink shared channel PUSCH.
  • Embodiment 51 The communication device according to Embodiment 50, wherein the processing module is further configured to stop monitoring the PDCCH according to the second search space group in the next time slot after the terminal sends the preamble code, and start monitoring the PDCCH according to the first search space group.
  • the group monitors PDCCH.
  • Embodiment 52 The communication device according to Embodiment 50, wherein the processing module is further configured to receive the DCI scrambled by using the random access wireless network temporary identifier RA-RNTI at the terminal; if the preamble code is used for non-contention access Enter, stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the first search space group.
  • the processing module is further configured to receive the DCI scrambled by using the random access wireless network temporary identifier RA-RNTI at the terminal; if the preamble code is used for non-contention access Enter, stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the first search space group.
  • Embodiment 53 The communication apparatus according to Embodiment 50, wherein the processing module is further configured to receive, at the terminal, a random access response RAR returned by the network device for the first signal; if the preamble code is used for non-contention access, Then, the monitoring of the PDCCH according to the second search space group is stopped, and the monitoring of the PDCCH according to the first search space group is started.
  • the processing module is further configured to receive, at the terminal, a random access response RAR returned by the network device for the first signal; if the preamble code is used for non-contention access, Then, the monitoring of the PDCCH according to the second search space group is stopped, and the monitoring of the PDCCH according to the first search space group is started.
  • Embodiment 54 The communication apparatus according to Embodiment 52 or Embodiment 53, wherein the processing module is further configured to, after the terminal receives a preset number of time units after the DCI scrambled by using the RA-RNTI, Or, after receiving a preset number of time units after the random access response RAR returned by the network device for the first signal, the terminal stops monitoring the PDCCH according to the second search space group and starts monitoring the PDCCH according to the first search space group.
  • Embodiment 55 The communication apparatus according to Embodiment 54, wherein the time unit includes any one of the following: an orthogonal frequency division multiplexing OFDM symbol, a time slot, or a millisecond.
  • Embodiment 56 The communication apparatus according to Embodiment 54, wherein the processing module is further configured to, when the terminal receives a preset number of time units after the DCI scrambled by using the RA-RNTI, at the first time slot, or, in the first time slot after a preset number of time units after receiving the random access response RAR returned by the network device for the first signal, the terminal stops monitoring the PDCCH according to the second search space group, and starts to monitor the PDCCH according to the second search space group.
  • the first search space group monitors the PDCCH.
  • Embodiment 57 The communication apparatus according to Embodiment 50, wherein the processing module is further configured to send the second signal to the network device after the terminal receives the random access response RAR returned by the network device for the first signal; if The preamble code is used for contention access, and the second signal includes the C-RNTI MAC control element, after sending the second signal, stop monitoring the PDCCH according to the second search space group, and start monitoring the PDCCH according to the first search space group.
  • Embodiment 58 The communication apparatus according to Embodiment 57, wherein the processing module is further configured to stop monitoring the PDCCH according to the second search space group when the random access contention resolution timer runs after the terminal sends the second signal , start monitoring the PDCCH according to the first search space group.
  • Embodiment 59 The communication apparatus according to Embodiment 50, wherein the terminal is configured with a retransmission timer, and the processing module is further configured to stop monitoring the PDCCH according to the second search space group when the retransmission timer is running, and start to monitor the PDCCH according to the second search space group.
  • the first search space group monitors the PDCCH; wherein the retransmission timer includes a downlink retransmission timer for discontinuous reception or an uplink retransmission timer for discontinuous reception.
  • Embodiment 60 The communication apparatus according to any one of Embodiment 50 to Embodiment 53 or Embodiment 55 to Embodiment 59, wherein the first search space group has the first configuration parameter, and the second search space group has the first configuration parameter.
  • Two configuration parameters; the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters; and/or, the parameters related to frequency domain monitoring in the second configuration parameters are A subset of the first configuration parameters related to frequency domain monitoring.
  • Embodiment 61 The communication device according to Embodiment 60, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring period of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters Include the monitoring period of the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring period of the second search space group is the monitoring period of the first search space group an integer multiple of the period.
  • Embodiment 62 The communication device according to Embodiment 50, wherein the parameters related to time domain monitoring in the first configuration parameters include a monitoring symbol set of the first search space group, and the parameters related to time domain monitoring in the second configuration parameters.
  • the parameters include the set of monitoring symbols for the second search space group.
  • the parameters related to time domain monitoring in the second configuration parameters are a subset of the parameters related to time domain monitoring in the first configuration parameters, including: the monitoring symbol set of the second search space group is a set of monitoring symbols of the first search space group. Monitors a subset of the symbol set.
  • Embodiment 63 The communication device according to Embodiment 62, wherein the parameters related to frequency domain monitoring in the first configuration parameter include a frequency domain monitoring location set of the first search space group, and the second configuration parameter is related to frequency domain monitoring. Relevant parameters include a set of frequency domain monitoring locations for the second search space group.
  • the parameter related to frequency domain monitoring in the second configuration parameter is a subset of the parameter related to frequency domain monitoring in the first configuration parameter, including: the set of frequency domain monitoring positions of the second search space group is the first search space A subset of the set of frequency domain monitoring locations for the group.
  • Embodiment 64 A terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein, when the processor executes the computer program, the implementation is as in Embodiment 1 - The physical downlink control channel PDCCH monitoring method described in any one of Embodiment 7, Embodiment 22 to Embodiment 35.
  • Embodiment 65 A computer program product, when running on a computer, enables the computer to execute the physical downlink control channel PDCCH described in any of the foregoing Embodiments 1 to 7 and 22 to 35 monitoring method.
  • Embodiment 66 A computer-readable storage medium, where instructions are stored in the computer-readable storage medium, when the computer-readable storage medium runs on a computer, the computer can execute the above-mentioned Embodiment 1-Embodiment 7 and Embodiment 22-Example 35.
  • the physical downlink control channel PDCCH monitoring method according to any one of the embodiments.
  • Embodiment 67 A chip includes a processor, and when the processor executes an instruction, the processor is configured to execute the physical device described in any of the foregoing Embodiments 1 to 7, and 22 to 35.
  • the instruction can come from memory inside the chip or from memory outside the chip.
  • the chip further includes an input and output circuit.
  • Embodiment 68 a communication system, comprising a network device, and the terminal according to Embodiment 64.

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Abstract

本申请实施例适用于通信技术领域，提供了一种物理下行控制信道PDCCH监测方法、装置及终端，该方法包括：终端接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；在终端根据第二搜索空间组监测PDCCH时，若接收到用于数据调度的下行控制信息DCI，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。采用上述方法，可以根据终端接收到的信息的类型对搜索空间组进行切换。当第二搜索空间组中各搜索空间的监测周期相对较大，第一搜索空间组中各搜索空间的监测周期相对较小时，终端切换至第一搜索空间组监测PDCCH，有助于快速完成数据传输，减少数据传输时延。

Description

物理下行控制信道PDCCH监测方法、装置及终端
本申请要求于2020年07月17日提交国家知识产权局、申请号为202010689787.2、申请名称为“物理下行控制信道PDCCH监测方法、装置及终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及一种物理下行控制信道PDCCH监测方法、装置及终端。
背景技术
基站通过物理下行控制信道(physical downlink control channel，PDCCH)向终端发送下行控制信息(downlink control information，DCI)。DCI中含有下行数据调度信息，用于指示终端在什么样的时频资源位置，以什么样的配置参数去接收并解调数据。
终端在接收DCI时，需要在下行控制区域的多个PDCCH候选位置(PDCCH candidate)中进行盲检(blind detect，BD)。终端需要盲检的一组PDCCH候选位置组成一个搜索空间组(search space set group，SSSG)。根据基站的配置，终端可能会监测一个或多个搜索空间组，从中找出是否有基站发送给自己的PDCCH。
现有技术中，针对非授权频谱，终端在监测PDCCH时可以对搜索空间组进行切换。例如，基站为终端配置了两个搜索空间组(搜索空间组0和搜索空间组1)，搜索空间组0和搜索空间组1的监测周期不同。在基站没有抢占到信道的时候，终端根据搜索空间组0监测PDCCH；在基站抢占到信道的时候，终端根据搜索空间组1监测PDCCH。终端通过在不同条件下使用更合适的监测周期监测PDCCH，可以达到节能等目的。但是，针对授权频谱，由于基站始终都占有信道，终端不适合按照上述方式进行搜索空间组的切换。
发明内容
本申请实施例提供一种物理下行控制信道PDCCH监测方法、装置及终端，解决了现有技术中针对授权频谱，终端不适合根据基站是否抢占到信道进行搜索空间组的切换的问题。
为达到上述目的，本申请采用如下技术方案：
第一方面，提供一种物理下行控制信道PDCCH监测方法，所述方法应用于终端，所述方法包括：终端接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；在终端根据第二搜索空间组监测PDCCH时，若终端接收到用于数据调度的下行控制信息DCI，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
基于上述技术方案，终端可以根据接收到的信息的类型，对搜索空间组进行切换。当第二搜索空间组中各搜索空间的监测周期相对较大，第一搜索空间组中各搜索空间的监测周期相对较小时，终端切换至第一搜索空间组监测PDCCH，有助于快速完成数据传输，减少数据传输时延。此外，终端通过是否需要调度数据来选择具有合适的监测周期的搜索空间组监测PDCCH，可以在没有数据传输时，根据监测周期相对较大的第二搜索 空间组监测PDCCH，减少终端的功耗，延长终端的待机时间。
在一种可能的实现方式中，第一搜索空间组具有第一配置参数，第二搜索空间组具有第二配置参数；第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。
通过将第一搜索空间组的第一配置参数和第二搜索空间组的第二配置参数配置为具有嵌套关系，可以避免终端和网络设备在未对齐的情况下丢失调度。这样，当由于某些错误情况导致网络设备和终端的时隙两侧没有对齐时，网络设备发送的调度信息也能够被终端接收到。
第二方面，提供一种物理下行控制信道PDCCH监测方法，所述方法应用于终端，所述方法包括：终端接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；在终端根据第二搜索空间组监测PDCCH时，若终端向网络设备发送第一信号，在发送第一信号后，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，其中，第一信号至少包括如下信号或信道中的其中一种：随机接入前导preamble码、调度请求SR、混合自动重传请求否定应答NACK，和/或物理上行共享信道PUSCH。
基于上述技术方案，终端可以根据向网络设备发送的第一信号的类型，来确定是否对搜索空间组进行切换，使得终端存在上行数据需要被调度，或终端处于异常状态下，通过发起随机接入流程请求恢复正常时，终端可以切换至监测周期相对较小的第一搜索空间组，根据第一搜索空间组监测PDCCH，可以减少PDCCH监测，降低终端功耗，降低信令开销。
第三方面，提供一种通信装置，该通信装置可以为终端或者终端中的芯片或者片上系统，该通信装置包括：处理器和存储器，存储器存储有指令，当指令被处理器执行时，使得通信装置执行以下步骤：接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；在根据第二搜索空间组监测PDCCH时，若接收到用于数据调度的下行控制信息DCI，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
第四方面，提供一种通信装置，该通信装置可以为终端或者终端中的芯片或者片上系统，该通信装置包括：处理器和存储器，存储器存储有指令，当指令被处理器执行时，使得通信装置执行以下步骤：接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；在根据第二搜索空间组监测PDCCH时，若向网络设备发送第一信号，在发送第一信号后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，其中，第一信号至少包括如下信号或信道中的其中一种：随机接入前导preamble码、调度请求SR、混合自动重传请求否定应答NACK，和/或物理上行共享信道PUSCH。
第五方面，提供一种通信装置，该通信装置包括：通信模块和处理模块。通信模块，用于接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息。处理模块，用于在根据第二搜索空间组监测PDCCH时，若接收到用于数据调度的下行控制信息DCI，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
第六方面，提供一种通信装置，该通信装置包括：通信模块和处理模块。通信模块，用于接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息。处理模块，用于在根据第二搜索空间组监测PDCCH时，若向网络设备发送第一信号，在发送第一信号后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，其中，第一信号至少包括如下信号或信道中的其中一种：随机接入前导preamble码、调度请求SR、混合自动重传请求否定应答NACK，和/或物理上行共享信道PUSCH。
第七方面，提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在终端上运行时，可以使得终端执行上述第一方面至第二方面中任一种设计所涉及的方法。
第八方面，提供一种包含指令的计算机程序产品，当其在终端上运行时，使得终端可以执行上述第一方面至第二方面中任一种设计所涉及的方法。
第九方面，提供一种芯片，该芯片包括处理器，当该处理器执行指令时，处理器用于执行上述第一方面至第二方面中任一种设计所涉及的方法。该指令可以来自芯片内部的存储器，也可以来自芯片外部的存储器。可选的，该芯片还包括输入输出电路。
第十方面，提供一种通信系统，包括网络设备和终端。其中，终端用于执行上述第一方面或者第二方面中任一种设计所涉及的PDCCH监测方法。
本申请实施例提供的PDCCH监测方法、装置及终端，具有如下优点：
终端通过接收基站配置的一个或多个搜索空间组的信息，由于每个搜索空间组中的搜索空间的监测周期可能不同，终端在根据第二搜索空间组监测PDCCH时，若终端接收到用于数据调度的DCI，则终端可以对搜索空间组进行切换，开始根据第一搜索空间组监测PDCCH。当第二搜索空间组中各个搜索空间的监测周期相对较大，第一搜索空间组中各个搜索空间的监测周期相对较小时，终端切换至监测周期相对较小的第一搜索空间组监测PDCCH，有助于快速完成数据传输，减少数据传输时延；终端通过是否需要调度数据来选择具有合适的监测周期的搜索空间组监测PDCCH，可以在没有数据传输时，根据监测周期相对较大的第二搜索空间组监测PDCCH，减少终端的功耗，延长终端的待机时间。
附图说明
图1为本申请实施例提供的一种PDCCH监测方法的场景示意图；
图2为本申请实施例提供的一种数据传输过程的示意图；
图3是本申请实施例提供的一种终端的结构示意图；
图4为本申请实施例提供的一种PDCCH监测方法的步骤流程示意图；
图5(a)是本申请实施例提供的一种视频缓冲时终端的界面示意图；
图5(b)是本申请实施例提供的一种视频播放过程中终端的界面示意图；
图6为本申请实施例提供的另一种PDCCH监测方法的步骤流程示意图；
图7为本申请实施例提供的一种终端切换搜索空间组的时间关系示意图；
图8为本申请实施例提供的一种基于非竞争的随机接入流程示意图；
图9为本申请实施例提供的一种基于竞争解决的随机接入流程示意图；
图10为本申请实施例提供的一种随机接入竞争解决定时器的启动过程示意图；
图11为本申请实施例提供的一种非连续接收的下行链路重传定时器的启动过程示 意图；
图12为本申请实施例提供的另一种非连续接收的下行链路重传定时器的启动过程示意图；
图13为本申请实施例提供的一种第一搜索空间组定时器的启动或重启过程示意图；
图14为本申请实施例提供的另一种第一搜索空间组定时器的启动或重启过程示意图；
图15为本申请实施例提供的一种通信装置的结构示意图；
图16为本申请实施例提供的一种芯片的结构示意图。
具体实施方式
为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。例如，第一搜索空间组和第二搜索空间组仅仅是为了区分不同的搜索空间组，并不对其数量和执行次序进行限定。
需要说明的是，本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请实施例中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
本申请实施例中，“配置”是指通过无线资源控制(radio resource control，RRC)信令配置，或者通过MAC控制元素(MAC control element，MAC CE)配置，或者通过DCI配置，或者通过其他信令配置；相应地，本申请实施例中的“指示”，可以是通过RRC信令指示，或者通过MAC CE指示，或者通过DCI指示，或者通过其他信令指示。
本申请实施例中提供的一种PDCCH监测方法中所涉及到的步骤仅仅作为示例，并非所有的步骤均是必须执行的步骤，或者并非各个信息或消息中的内容均是必选的，在使用过程中可以根据需要酌情增加或减少。
本申请实施例中同一个步骤或者具有相同功能的步骤或者消息在不同实施例之间可以互相参考借鉴。
如图1所示，是本申请实施例提供的一种PDCCH监测方法的场景示意图。在图1的场景中，包括网络设备101和终端102。通常，网络设备与终端之间的数据传输是按照这样的流程来进行的：网络设备向终端发送DCI，DCI中含有下行数据调度信息，网 络设备通过下行数据调度信息告诉终端在什么时频资源位置，以什么样的配置参数(如调制与编码策略(modulation and coding scheme，MCS)、冗余版本(redundancy version，RV)等等)去接收并解调下行数据。然后，网络设备在DCI中指示的时频资源位置，以DCI中指示的配置参数发送对应的下行数据，终端在对应位置以相应参数进行接收。或者，DCI中含有上行数据调度信息，终端在DCI中指示的时频资源位置，以DCI中指示的配置参数发送对应的上行数据，网络设备在对应位置以相应参数进行接收。
上述过程可以参见图2所示。其中，PDCCH携带DCI，物理下行共享信道(physical downlink shared channel，PDSCH)携带下行数据，物理上行共享信道(physical uplink shared channel，PUSCH)携带上行数据。
在本申请实施例中，图1中所示的网络设备101可以是无线通信的基站或基站控制器等。例如，所述基站可以包括各种类型的基站，例如：微基站(也称为小站)，宏基站，中继站，接入点等，本申请实施例对此不作具体限定。在本申请实施例中，所述基站可以是全球移动通信系统(global system for mobile communication，GSM)，码分多址(code division multiple access，CDMA)中的基站(base transceiver station，BTS)，宽带码分多址(wideband code division multiple access，WCDMA)中的基站(node B)，长期演进(long term evolution，LTE)中的演进型基站(evolutional node B，eNB或e-NodeB)，物联网(internet of things，IoT)或者窄带物联网(narrow band-internet of things，NB-IoT)中的eNB，未来5G移动通信网络或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的基站，本申请实施例对此不作任何限制。本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统。在本申请实施例中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
本申请实施例所述的网络设备，例如基站，通常包括基带单元(baseband unit，BBU)、射频拉远单元(remote radio unit，RRU)、天线、以及用于连接RRU和天线的馈线。其中，BBU用于负责信号调制。RRU用于负责射频处理。天线用于负责线缆上导行波和空气中空间波之间的转换。一方面，分布式基站大大缩短了RRU和天线之间馈线的长度，可以减少信号损耗，也可以降低馈线的成本。另一方面，RRU加天线比较小，可以随地安装，让网络规划更加灵活。除了RRU拉远之外，还可以把BBU全部都集中起来放置在中心机房(central office，CO)，通过这种集中化的方式，可以极大减少基站机房数量，减少配套设备，特别是空调的能耗，可以减少大量的碳排放。此外，分散的BBU集中起来变成BBU基带池之后，可以统一管理和调度，资源调配更加灵活。这种模式下，所有的实体基站演变成了虚拟基站。所有的虚拟基站在BBU基带池中共享用户的数据收发、信道质量等信息，相互协作，使得联合调度得以实现。
在一些部署中，基站可以包括集中式单元(centralized unit，CU)和分布式单元
(Distributed Unit，DU)。基站还可以包括有源天线单元(active antenna unit，AAU)。CU实现基站的部分功能，DU实现基站的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)、媒体接入控制(media access control，MAC)和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天 线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令或PDCP层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，网络设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，CU可以划分为RAN中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，在此不做限制。
图1中所示的终端102是一种具有无线收发功能的设备。终端可以被部署在陆地上，包括室内或室外、手持或车载；也可以被部署在水面上(如轮船等)；还可以被部署在空中(例如飞机、气球和卫星上等)。终端设备可以是用户设备(user equipment，UE)。其中，UE包括具有无线通信功能的手持式设备、车辆、车载设备、可穿戴设备或计算设备。示例性地，UE可以是手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端设备还可以是虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请实施例中，用于实现终端的功能的装置可以是终端，也可以是能够支持终端实现该功能的装置，例如芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。本申请实施例中，以用于实现终端的功能的装置是终端为例，描述本申请实施例提供的技术方案。
示例性的，图3示出了一种终端的结构示意图。如图3所示，该终端包括：至少一个处理器301，通信线路302，存储器303以及至少一个通信接口304。
处理器301可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信线路302可包括一通路，在上述组件之间传送信息。
通信接口304，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，RAN，无线局域网(wireless local area networks，WLAN)等。
存储器303可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路302与处理器相连接。存储器也可以和处理器集成在一起。本申请实施例提供的存储器通常可以具有非易失性。其中，存储器303用于存储执行本申请方案的计算机执行指令，并由处理器301来控制执行。处理器301用于执行存储器303中存储的计算机执行指令，从而实现本申请下述实施例提供的方法。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器301可以包括一个或多个CPU，例如图3中的CPU0和CPU1。
在具体实现中，作为一种实施例，终端可以包括多个处理器，例如图3中的处理器301和处理器307。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
在具体实现中，作为一种实施例，终端还可以包括输出设备305和输入设备306。输出设备305和处理器301通信，可以以多种方式来显示信息。例如，输出设备305可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)，显示设备，或投影仪(projector)等。输入设备306和处理器301通信，可以以多种方式接收用户的输入。例如，输入设备306可以是鼠标、键盘、触摸屏设备或传感设备等。
下面结合说明书附图，对本申请实施例所提供的技术方案进行具体介绍。
如图4所示，是本申请实施例提供的一种PDCCH监测方法的步骤流程示意图。该方法可以应用于图1所示的终端102中，终端102可以是具有图3所示的结构的终端。为了便于理解，后文以终端102为手机来对本申请实施例提供的PDCCH监测方法进行介绍。该方法可以包括如下步骤：
S401、终端接收网络设备配置的搜索空间信息，所述搜索空间信息包括第一搜索空间组和第二搜索空间组的信息。
在本申请实施例中，网络设备可以是图1中所示的基站101。
在本申请实施例中，基站会为终端配置出一个或多个搜索空间组(search space set group，SSSG)。终端需要监测一个或多个搜索空间组，从中找出是否有基站发送给自己的PDCCH。
通常，每个PDCCH由一个或多个控制信道元素(control channel element，CCE)组成。一个PDCCH含有的CCE的个数被称为聚合等级(aggregation level，AL)。当一个PDCCH由1个CCE组成时，该PDCCH的聚合等级为1；当一个PDCCH由2个CCE组成时，该PDCCH的聚合等级为2，以此类推。可能的聚合等级可以包括多种，如1、2、4、8和16，共5种。终端在一定的时频范围内盲检PDCCH时，该时频范围即可以被称为一个搜索空间。搜索空间在时间上通常是周期性出现的。进一步地，一个搜索空间组可以包括一个或多个搜索空间，即可以理解为，一个或多个搜索空间组成的一个整体被称为一个搜索空间组。
基站在配置一个或多个搜索空间组时，相关的配置信息元素(information element，IE)可以包括：
searchSpacesToAddModList：向列表中添加搜索空间配置，该列表列举了基站配置给终端的一个或多个搜索空间。
searchSpacesToReleaseList：从列表中删除搜索空间。
需要说明的是，在不同的文档中，对于搜索空间的称呼可能不同。例如，在其他一些文档中，搜索空间(search space)也可能被称为搜索空间集合(search space set)。
在本申请实施例中，每个搜索空间的配置项可以包括监测该搜索空间时的监测周期和偏移值、一个时隙内需要监测的符号，每种聚合等级需要盲检的次数，等等。相关的 配置IE如下所示：
controlResourceSetId：代表了该搜索空间关联的控制资源集合(control resource set，CORESET)的索引值。根据关联的CORESET的配置，可以确定该搜索空间占用的频域资源、需要监测的符号长度duration、控制信道元素(control channel element，CCE)到资源单元组(resource element group，REG)的映射方式、预编码粒度、传输配置指示(Transmission Configuration Indicator，TCI)状态配置等。
monitoringSlotPeriodicityAndOffset：代表了该搜索空间需要监测的时隙的监测周期以及偏移值。其中，采用slx表示周期的大小。例如，sl1代表监测周期为1个时隙，表示终端每隔1个时隙对PDCCH进行一次监测；sl8代表监测周期为8个时隙，表示终端可以每隔8个时隙对PDCCH进行一次监测。在选定一个周期值后，还需要指示监测偏移值。例如，网络设备配置sl8(即监测周期为8个时隙)后，还需要配置在一个周期中的第几个时隙开始监测该搜索空间，可选值为0～7，分别对应一个周期中的各个时隙。
duration：代表了该搜索空间每次出现时持续的时域长度，单位为时隙，即在一个周期内需要监测的时隙个数。
monitoringSymbolsWithinSlot：代表了该搜索空间在需要监测的时隙内要监测的起始符号，其值是一个长度为14的比特序列，分别指示一个时隙内的14个符号是否是需要被监测的起始符号。例如，其取值为10000001000000，则在一个时隙内需要监测的起始符号为符号0和符号7。如果此时该搜索空间关联的CORESET的duration取值为3，则所有需要监测的符号为符号0，符号1，符号2，符号7，符号8，以及符号9。
nrofCandidates：代表了该搜索空间内，各个聚合等级需要盲检的PDCCH candidate个数。
aggregationLevelx：代表了聚合等级为x的PDCCH candidate需要盲检的次数。例如，aggregationLevel1取值为n6，表示聚合等级为1的PDCCH candidate需要盲检6次。
searchSpaceType：代表了该搜索空间的类型。searchSpaceType取值为common时，表示该搜索空间为公共搜索空间。此时其中可以选择配置的参数有：dci-Format0-0-AndFormat1-0、dci-Format2-0、dci-Format2-1、dci-Format2-2、dci-Format2-3。当上述参数中任意一个参数被配置时，表明终端需要在该搜索空间内监测相应格式的DCI。例如，若配置了dci-Format0-0-AndFormat1-0，说明终端需要在该搜索空间内监测DCI format 0_0以及DCI format 1_0；当未配置dci-Format0-0-AndFormat1-0时，说明终端不需要在该搜索空间内监测DCI format 0_0以及DCI format 1_0。searchSpaceType取值为UE-specific时，表示该搜索空间为用户设备特定搜索空间。此时其中可以选择配置的参数有：formats0-0-And-1-0或formats0-1-And-1-1。当上述参数中任意一个参数被配置时，表明终端需要在该搜索空间内监测相应格式的DCI。
在本申请实施例的一种可能的实现方式中，基站为终端配置的搜索空间组可以包括第一搜索空间组和第二搜索空间组。终端可以通过接收基站发送的DCI获取到第一搜索空间组和第二搜索空间组的配置信息。其中，第一搜索空间组包括的搜索空间的监测周期小于或等于第二搜索空间组包括的搜索空间的监测周期。
S402、在终端根据所述第二搜索空间组监测PDCCH时，若所述终端接收到用于数据调度的下行控制信息DCI，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH。
在本申请实施例中，终端可以根据数据调度的具体需求，对监测的搜索空间组进行切换。
在本申请实施例中，每一个搜索空间组包括多个搜索空间，每个搜索空间的监测周期都是独立配置的。基站可以将每个搜索空间组中的各个搜索空间的监测周期配置为相同大小，也可以配置为不同大小。
在本申请实施例的一种可能的实现方式中，第一搜索空间组包括的每一个搜索空间的监测周期都小于第二搜索空间组包括的每一个搜索空间的监测周期。
示例性的，第一搜索空间组包括第一搜索空间和第二搜索空间，第二搜索空间组包括第三搜索空间和第四搜索空间。其中，第一搜索空间和第二搜索空间的监测周期可以分别是3个时隙和4个时隙。对应地，第三搜索空间和第四搜索空间的监测周期可以分别是6个时隙和8个时隙。在此情况下，第一搜索空间组中的每一个搜索空间的监测周期都小于第二搜索空间组中的每一个搜索空间的监测周期。
在本申请实施例的另一种可能的实现方式中，第一搜索空间组包括的多个搜索空间中，部分搜索空间的监测周期小于第二搜索空间组中每一个搜索空间的监测周期。
示例性的，第一搜索空间和第二搜索空间的监测周期可以分别是3个时隙和10个时隙。对应地，第三搜索空间和第四搜索空间的监测周期可以分别是6个时隙和8个时隙。在此情况下，第一搜索空间组中的部分搜索空间的监测周期小于第二搜索空间组中的搜索空间的监测周期。
第一搜索空间组中的各个搜索空间的监测周期，以及第二搜索空间组中的各个搜索空间的监测周期可以配置为任意大小，本申请实施例对各个搜索空间的监测周期的大小不作限定。
因此，在终端根据监测周期相对较大的第二搜索空间组监测PDCCH时，若终端接收到用于数据调度的DCI，则表示当前在基站和终端之间可能存在数据需要传输。如果终端继续使用监测周期相对较大的第二搜索空间组监测PDCCH，则可能延长数据传输时间，从而导致数据传输时延过大。此时，终端可以停止根据第二搜索空间组监测PDCCH，开始根据监测周期相对较小的第一搜索空间组监测PDCCH，有助于快速完成数据传输，减小数据传输时延。
在本申请实施例中，用于数据调度的DCI可以属于使用如下任意一种无线网络临时标识(radio network tempory identity，RNTI)加扰的DCI：
小区无线网络临时标识C-RNTI、调制与编码策略无线网络临时标识MCS-C-RNTI，或配置调度无线网络临时标识CS-RNTI。
在本申请实施例的另一种可能的实现方式中，终端根据第二搜索空间组监测PDCCH时，如果接收到用于数据调度的DCI，终端在开始根据第一搜索空间组监测PDCCH时，也可以不停止根据第二搜索空间组监测PDCCH，而是同时根据第一搜索空间组和第二搜索空间组监测PDCCH。
在本申请实施例的一种可能的实现方式中，当终端根据第一搜索空间组监测PDCCH时，如果接收到用于数据调度的DCI，终端可以继续根据第一搜索空间组监测PDCCH，而不需要切换搜索空间组。
在本申请实施例的一种可能的实现方式中，终端可以配置有一个计时器timer，通过该timer来限制使用不同的搜索空间组的时间。例如，当该timer启动时，终端由第二搜 索空间组切换至第一搜索空间组。当该timer超时后，终端可以由第一搜索空间组切换回第二搜索空间组。
在本申请实施例中，终端通过接收基站配置的一个或多个搜索空间组的信息，由于不同的搜索空间组中包括的搜索空间的监测周期可能不同，终端根据第二搜索空间组监测PDCCH时，若终端接收到用于数据调度的DCI，则终端可以开始根据第一搜索空间组监测PDCCH。当上述第一搜索空间组中各个搜索空间的监测周期相对较小时，例如，第一搜索空间组中全部或者部分搜索空间的监测周期小于第二搜索空间组中各个搜索空间的监测周期，终端在接收到用于数据调度的DCI时，通过由监测周期相对较大的第二搜索空间组切换至监测周期相对较小的第一搜索空间组，有助于快速完成数据传输，减少数据传输时延；终端通过是否需要调度数据来选择具有合适的监测周期的搜索空间组监测PDCCH，可以在没有数据传输时，根据监测周期相对较大的第二搜索空间组监测PDCCH，减少终端的功耗，延长终端的待机时间。
在本申请实施例中，当数据到达时，终端可以对搜索空间组进行切换。例如，由第二搜索空间组切换至第一搜索空间组。若第二搜索空间组中各个搜索空间的监测周期相对较大，则终端在切换到监测周期相对较小的第一搜索空间组后，可以实现快速地对数据进行调度。
在本申请实施例中，数据到达的标识之一就是终端接收到预设的DCI(scheduling DCI，即调度数据的DCI)，scheduling DCI即包括使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI。
通常，终端可以在UESS中监测使用上述C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI。因此，在本申请实施例的一种可能的实现方式中，用于数据调度的DCI可以是UESS内使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI。
由于公共搜索空间CSS不属于任何一个搜索空间组，终端需要始终在CSS中监测PDCCH。
因此，在本申请实施例的另一种可能的实现方式中，第一搜索空间组和第二搜索空间组仅针对用户设备特定搜索空间UESS，而公共搜索空间CSS不属于任何一个搜索空间组，终端需要始终在CSS中监测PDCCH。
在本申请实施例中，公共搜索空间CSS可以分为如下几类：
(1)Type 0 CSS，用于传输调度SIB1的DCI，通过MIB配置，或通过PDCCH-ConfigCommon配置，其中监测的DCI是用SI-RNTI加扰的；
(2)Type 0A CSS，用于传输调度OSI(即除了SIB1之外的其他SIB，例如SIB2/SIB3等)的DCI，通过PDCCH-ConfigCommon配置，其中监测的DCI是用SI-RNTI加扰的；
(3)Type 1 CSS，用于传输随机接入流程相关的DCI，通过PDCCH-ConfigCommon配置，其中监测的DCI是用RA-RNTI、MsgB-RNTI或TC-RNTI加扰的；
(4)Type 2 CSS，用于传输寻呼(paging)的DCI，通过PDCCH-ConfigCommon配置，其中监测的DCI是用P-RNTI加扰的；
(5)Type 3 CSS，用于传输除了上述类型外其他类型的DCI，通过PDCCH-Config配置，其中监测的DCI可以用如下任意一种RNTI加扰：INT-RNTI、SFI-RNTI、TPC-PUSCH-RNTI、TPC-PUCCH-RNTI、TPC-SRS-RNTI、CI-RNTI、PS-RNTI、C-RNTI、MCS-C-RNTI或CS-RNTI(s)。
因此，在本申请实施例的另一种可能的实现方式中，用于数据调度的DCI还可以是第三类型公共搜索空间CSS type 3内使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI。此时，第一搜索空间组和第二搜索空间组仅针对用户设备特定搜索空间UESS和Type 3 CSS，而其他类型的CSS不属于任何一个搜索空间组，终端需要始终在其他类型的CSS(如Type 0 CSS、Type 0A CSS、Type 1 CSS和Type 2 CSS)中监测PDCCH。
在本申请实施例中，终端通过判断接收到的DCI是否属于用于数据调度的DCI，可以确定当前是否有下行业务到达。若有下行业务到达，则终端可以对搜索空间组进行切换，开始根据第一搜索空间组监测PDCCH。若第一搜索空间组中全部或者部分搜索空间的监测周期小于切换前第二搜索空间组中各个搜索空间的监测周期，则终端在根据监测周期相对较小的第一搜索空间组监测PDCCH时，可以快速地对下行数据进行调度，减少用户等待时间。
又或者，在本申请实施例的另一种可能的实现方式中，第一搜索空间组和第二搜索空间组包括任意类型的搜索空间，例如，第一搜索空间组和第二搜索空间组中可以包括UESS和CSS。此时终端根据第一搜索空间组监测PDCCH时，即使是公共控制信息也可以以较大的周期进行检测，可以进一步减少功耗。
作为本申请实施例的一种示例，在图1所示的场景中，用户可以使用图1中的终端看视频。通常，视频在播放前，为了保证视频播放的流畅性，终端需要预先缓冲一段时间的数据。如图5(a)所示，是视频缓冲时终端的界面示意图。在缓冲的时候，由于有大量的数据需要传输，此时终端使用监测周期相对较小的第一搜索空间组来监测PDCCH较优，从而可以快速地完成数据传输，减少数据缓冲的等待时间。当视频缓冲完成后，例如在图5(b)所示的视频播放过程中，暂时无数据传输，此时终端使用监测周期相对较大的第二搜索空间组来监测PDCCH较优，从而可以避免功耗浪费。当终端从“未缓冲数据”状态，进入“开始进行数据缓冲”时，即终端需要从监测周期相对较大的第二搜索空间组切换到监测周期相对较小的第一搜索空间组时，可以按照本申请实施例提供的方法，通过判断终端是否接收到用于数据调度的DCI来实现搜索空间组的切换。
如图6所示，是本申请实施例提供的另一种PDCCH监测方法的步骤流程示意图。该方法可以应用于图1所示的终端102中，终端102可以是具有图3所示的结构的终端。该方法可以包括如下步骤：
S601、终端接收网络设备配置的搜索空间信息，所述搜索空间信息包括第一搜索空间组和第二搜索空间组的信息。
由于S601与前述实施例中S401类似，可以相互参阅，在此不再赘述。
S602、在所述终端根据所述第二搜索空间组监测PDCCH时，若所述终端向所述网络设备发送第一信号，在发送所述第一信号后，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，所述第一信号至少包括如下信号或信道中的其中一种：随机接入前导preamble码、调度请求SR、混合自动重传请求否定应答NACK，和/或物理上行共享信道PUSCH。
在本申请实施例中，网络设备可以是基站；第一信号可以是由终端发送给基站的信号。需要说明的是，第一信号仅是为了描述方便而对特定类型的信号的一个代称，第一信号可以包括一种或多种满足相应条件的信号。当终端发送第一信号后，可以对当前监测PDCCH的搜索空间组进行切换。
在本申请实施例的一种可能的实现方式中，第一信号可以是随机接入前导preamble码。
通常，当终端出现异常状态时，例如终端出现无线链路失败(radio link failure)、波束失败(beam failure)或上行失步等状态时，终端会发起随机接入流程以使终端恢复正常状态。此时，为了尽可能快速地恢复正常，终端可以对监测PDCCH的搜索空间组进行切换。
由于终端在执行恢复正常的操作时，首先需要向基站发送preamble码或物理随机接入信道(physical random access channel，PRACH)码。因此，可以将终端是否向基站发送preamble码或PRACH码作为判断条件，在终端向基站发送preamble码或PRACH码后，终端可以停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
当然，终端在开始根据第一搜索空间组监测PDCCH后，也可以不停止根据第二搜索空间组监测PDCCH，而是同时根据第一搜索空间组和第二搜索空间组监测PDCCH。
或者，如果终端向基站发送preamble码或PRACH码时，正在根据第一搜索空间组监测PDCCH，则在终端向基站发送preamble码或PRACH码后，终端也可以继续根据第一搜索空间组监测PDCCH。
在本申请实施例的一种可能的实现方式中，第一搜索空间组中各个搜索空间的监测周期，较第二搜索空间组中各个搜索空间的监测周期，可以是相对更小的。例如，第一搜索空间组中全部或者部分搜索空间的监测周期小于第二搜索空间组中各个搜索空间的监测周期。因此，终端在由监测周期相对较大的第二搜索空间组切换至监测周期相对较小的第一搜索空间组，开始根据第一搜索空间组监测PDCCH后，有助于终端快速恢复至正常状态。
在本申请实施例的一种可能的实现方式中，第一搜索空间组中各个搜索空间的监测周期，较第二搜索空间组中各个搜索空间的监测周期，可以是相对更大的。在另一种可能的实现方式中，第一搜索空间组中各个搜索空间的监测周期，较第二搜索空间组中各个搜索空间的监测周期，可以是相同的。本申请实施例对第一搜索空间组中各个搜索空间的监测周期，与第二搜索空间组中各个搜索空间的监测周期的具体周期不做限定。可以理解的是，这些周期可以由基站配置。在本申请实施例的一种可能的实现方式中，终端在向基站发送preamble码或PRACH码后，开始根据第一搜索空间组监测PDCCH的具体时间，可以是指，终端在发送preamble码或PRACH码后的预设个数的时隙。上述预设个数的时隙可以根据实际需要预先配置，本申请实施例对预设个数的时隙的具体个数不作限定。
示例性的，上述预设个数可以是一个。即，在发送preamble码或PRACH码后的下一个时隙，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
如图7所示，是本申请实施例提供的一种终端切换搜索空间组的时间关系示意图。在图7中，横坐标t表示各个时隙之间的时间先后关系，其中时隙T的下一个时隙为时隙T+1。若终端在时隙T向基站发送preamble码，则终端可以在时隙T+1开始根据第一搜索空间组监测PDCCH。
在本申请实施例的另一种可能的实现方式中，终端在向基站发送preamble码或PRACH码后，开始根据第一搜索空间组监测PDCCH的具体时间，还可以是指，终端接 收到使用随机接入无线网络临时标识RA-RNTI加扰的DCI，且该DCI用于非竞争接入。
通常，终端在向基站发送preamble码或PRACH码后，终端会接收到基站发送的随机接入响应(random access response，RAR)，RAR是使用RA-RNTI加扰的DCI调度的。因此，在非竞争接入的情况下，在终端接收到RA-RNTI加扰的DCI之后，就表示终端已经接入成功。在此之后，终端通常就会开始数据调度。因此，当终端接收到使用RA-RNTI加扰的DCI，若使用RA-RNTI加扰的DCI用于非竞争接入，则终端可以停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。在本申请实施例的一种可能的实现方式中，终端在开始根据第一搜索空间组监测PDCCH时，也可以不停止根据第二搜索空间组监测PDCCH。即，终端可以同时使用第一搜索空间组和第二搜索空间组监测PDCCH。
在本申请实施例中，在终端出现异常状态时，终端可以通过发起随机接入流程以使终端尽快恢复正常。此时，可以通过判断终端是否发送preamble码或PRACH码，从而在发送preamble码或PRACH码的下一个时隙，终端开始根据监测周期相对较小的第一搜索空间组监测PDCCH，有助于终端快速恢复正常。
考虑到传输RA-RNTI加扰的DCI的搜索空间是公共搜索空间，终端接收到基站发送的使用RA-RNTI加扰的DCI，可能并不表示随机接入信道(random access channel，RACH)流程接入成功。例如，由于RA-RNTI调度的PDSCH可能携带多个终端的RAR，当前终端接收到的PDCCH调度的PDSCH可能并不包含该终端的RAR。此时，对于终端而言，RAR其实是接收失败的，RACH也未成功。
因此，在本申请实施例的一种可能的实现方式中，针对RRC连接态发起的基于非竞争(contention-free based)的RACH流程，终端可以在接收到RAR(由用RA-RNTI加扰的DCI调度的PDSCH承载)之后开始进行搜索空间组的切换。考虑到RAR的解析时间，终端可以在接收到RAR之后的预设个数的时间单元后开始进行搜索空间组的切换。例如，若终端当前根据第二搜索空间组监听PDCCH，则在终端向基站发送preamble码并接收到基站发送的RAR之后的预设个数的时间单元后，终端对搜索空间组进行切换，开始根据第一搜索空间组监听PDCCH。其中，第二搜索空间组中部分或全部搜索空间的监测周期大于第一搜索空间组中部分或全部搜索空间的监测周期。上述时间单元的具体个数可以根据实际需要预先设置，本申请实施例对时间单元的个数不作限定。上述时间单元可以包括正交频分复用(orthogonal frequency division multiplexing，OFDM)符号，时隙，毫秒等。
在本申请实施例的另一种可能的实现方式中，终端在接收到RAR之后的预设个数的时间单元后开始进行搜索空间组的切换，可以是指在接收到RAR之后的预设个数的时间单元后的第一个时隙，终端开始根据第一搜索空间组监测PDCCH。
如图8所示，是本申请实施例提供的一种基于非竞争的随机接入流程示意图。在图8中，终端发起随机接入流程时，向基站发送第一信号，第一信号可以是preamble码或PRACH码。基站在接收到上述第一信号后，向终端返回RAR。然后，终端可以在接收到RAR之后的N个时间单元后，切换搜索空间组。例如，由第二搜索空间组切换至第一搜索空间组，开始根据第一搜索空间组监测PDCCH。在上述N个时间单元内，终端可以对接收到的RAR进行解析，以确保是在准确地接收到RAR后，对搜索空间组进行切换。
通常，基于竞争解决(contention based)的RACH流程，终端在向基站发送preamble码后，基站暂时无法区分接收到的preamble码是由哪个终端发送的。如果终端在发送preamble码后，便对搜索空间组进行切换，由于基站无法区分发送preamble码的终端，基站此时将不会同步地进行搜索空间组的切换，容易造成终端和基站之间切换时机的不匹配。在终端开始根据切换后的搜索空间组监测PDCCH时，将会导致不必要的功耗浪费。
如图9所示，是本申请实施例提供的一种基于竞争解决的随机接入流程示意图。在基于竞争的RACH流程中，终端向基站发送第一信号，第一信号可以是preamble码或PRACH码。基站在接收到上述第一信号后，向终端返回RAR。然后，终端向基站发送第二信号。基站接收到终端发送的第二信号后，将会启动随机接入竞争解决定时器(ra-ContentionResolutionTimer)。如果终端发送的第二信号中包括了C-RNTI MAC CE，则终端在随机接入竞争解决定时器运行期间将会监听使用C-RNTI加扰的PDCCH。如果终端接收到使用C-RNTI加扰的PDCCH，则表示该终端的竞争解决成功。此时，相应的RACH流程也就成功完成。
由于使用C-RNTI加扰的PDCCH是在类型为USS或Type3CSS的搜索空间中监听的，而USS和Type3CSS是进行分组的，如第一搜索空间组或第二搜索空间组。因此，在本申请实施例的另一种可能的实现方式中，针对RRC连接态发起的基于竞争的随机接入访问过程(contention-based random access，CRBA)中，终端可以在向基站发送包括有C-RNTI MAC CE的第二信号后，对搜索空间组进行切换。例如，由第二搜索空间组切换至第一搜索空间组，并开始根据第一搜索空间组监听PDCCH。
在图9的基础上，参见图10所示，是本申请实施例提供的一种随机接入竞争解决定时器的启动过程示意图。终端在向基站发送第二信号，终端和基站将会分别维护一个随机接入竞争解决定时器。因此，当随机接入竞争解决定时器启动时，终端可以对搜索空间组进行切换，由第二搜索空间组切换至第一搜索空间组。在随机接入竞争解决定时器运行期间，终端根据第一搜索空间组监听PDCCH。
由于在基于竞争的随机接入过程中，基站无法区分preamble码是由哪一个终端发送的，因此基站在接收到preamble码后，并不会马上对搜索空间组进行切换，如果终端过早地对搜索空间组进行切换，将会造成终端和基站之间的切换时机的不匹配，带来不必要的PDCCH监听，增加终端的功耗。因此，在本申请实施例中，终端可以在发送包括有C-RNTI MAC CE的第二信号后，才对搜索空间组进行切换，由于此时基站已经能够识别当前是哪一个终端发起的随机接入流程，基站可以与终端同步地完成搜索空间组的切换，保证之间二者的切换时机相吻合，有助于降低终端的功耗。
在前述实施例S401-S402中，当终端接收到表征下行业务到达的DCI时，终端可以开始根据监测周期相对较小的第一搜索空间组监测PDCCH。类似地，当上行业务到达时，终端与基站之间也存在需要传输的数据。
因此，在本申请实施例的另一种可能的实现方式中，第一信号也可以是调度请求SR。
通常，当终端有数据需要传输至基站时，即终端存在上行数据待传输时，终端可以首先向基站发送SR。基站收到SR后，会给终端发送DCI调度PUSCH传输。此时，为了保证上行数据能够尽快传输完毕，终端在发送SR后，可以根据监测周期相对较小的第一搜索空间组监测PDCCH。具体的，如果终端发送SR时，正在根据第二搜索空间组监 测PDCCH，则终端在发送SR后，可以停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。或者终端在发送SR后，可以开始根据第一搜索空间组和第二搜索空间组监测PDCCH。如果终端发送SR时，正在根据第一搜索空间组监测PDCCH，则终端在发送SR后，也可以继续根据第一搜索空间组监测PDCCH。
在本申请实施例中，当终端向基站发送preamble码或SR等信号时，可以表示终端当前需要快速接入基站以恢复正常状态或者终端有上行数据到达。因此，终端可以在发送preamble码或SR后，开始根据监测周期相对较小的第一搜索空间组监测PDCCH，以实现业务的快速恢复或上述数据的快速调度。
在本申请实施例中，针对半静态调度的场景，例如下行半静态调度(downlink semi-persistent scheduling，DL SPS)，或配置的上行授权(configured UL grant)，如配置的类型1或类型2的上行授权(configured UL grant Type 1or Type 2)，一旦配置或激活后，不需要动态的调度授权，终端就可以按照一定的周期去接收PDSCH，或发送PUSCH。例如，针对DL SPS或configured UL grant Type 2，通过RRC信令可以配置好相关参数。如果终端接收到一个DCI(该DCI由使用CS-RNTI加扰的PDCCH传输)激活了DL SPS或configured UL grant Type 2，则终端可以开始周期性地接收DL SPS的PDSCH或周期性地发送PUSCH。可见，基站在发送激活DCI(该激活DCI指示了第一个PDSCH/PUSCH的时频资源)之后，不再需要发送新的调度DCI，终端就可以在半静态配置的资源上收发数据。基站可以通过发送DCI释放DL SPS或configured UL grant Type 2的半静态资源。在接收到释放DCI(该DCI也是由使用CS-RNTI加扰的PDCCH传输)之后，终端可以停止接收DL SPS的PDSCH或停止发送半静态的PUSCH。而对于configured UL grant Type 1，激活或释放半静态PUSCH资源都是通过RRC信令配置的。
在半静态调度期间，由于基站针对半静态PDSCH/PUSCH资源不需要发送动态的调度DCI，终端可能会在一段时间内在监测周期相对较小的某一搜索空间组内监听不到DCI，从而切换到监测周期相对较大的另一搜索空间组去监听PDCCH。例如，如果终端在一段时间内监听不到DCI，则InactivityTimer就不会重启，在该InactivityTimer超时后，终端将会由第一搜索空间组切换到第二搜索空间组。
但是，在半静态调度期间，可能会触发非连续接收(discontinuous reception，DRX)重传定时器的启动，在DRX重传定时器运行时，可能有重传数据，终端需要监听使用CS-RNTI加扰的PDCCH。如图11所示，是本申请实施例提供的一种非连续接收的下行链路重传定时器(drx-RetransmissionTimerDL)的启动过程示意图。在图11中，针对DL SPS，如果终端在一次混合自动重传请求(hybrid automatic repeat request，HARQ)反馈中反馈了混合自动重传请求否定应答NACK，表示该终端没有正确地对PDSCH进行译码。那么，在对应的非连续接收下行链路HARQ往返时间定时器(drx-HARQ-RTT-TimerDL)超时后，终端将会启动drx-RetransmissionTimerDL。在drx-RetransmissionTimerDL运行期间，终端可以监听PDCCH以期待收到重传数据。
如图12所示，是本申请实施例提供的另一种非连续接收的上行链路重传定时器的启动过程示意图。在图12所示的上行数据传输过程中，终端发送PUSCH之后，将会启动drx-HARQ-RTT-TimerUL。每当drx-HARQ-RTT-TimerUL超时，终端就启动drx-RetransmissionTimerUL。终端在drx-RetransmissionTimerUL运行期间，将会监听可能的上行重传调度。
那么，在相应的重传定时器，例如drx-RetransmissionTimerDL或者非连续接收的上行链路重传定时器(drx-RetransmissionTimerUL)运行时，如果终端监听的是监测周期相对较大的搜索空间组，如第二搜索空间组，则可能会增加终端的重传调度时延。
因此，在本申请实施例中，当非连续接收的重传定时器运行时，终端可以根据监测周期相对较小的第一搜索空间组监听PDCCH，以减少重传时延，减少数据时延。需要说明的是，上述非连续接收的重传定时器包括非连续接收的下行链路重传定时器(drx-RetransmissionTimerDL)或非连续接收的上行链路重传定时器(drx-RetransmissionTimerUL)。
在本申请实施例中，若终端在非连续接收的重传定时器运行期间，在第一搜索空间组内未监听到任何DCI，则在上述非连续接收的重传定时器超时后，终端可以对搜索空间组进行切换，由监测周期相对较小的第一搜索空间组切换至监测周期相对较大的第二搜索空间组，根据第二搜索空间组监听PDCCH，以节省终端的功耗。
在本申请实施例的一种可能的实现方式中，基站在为终端配置搜索空间组时，可以引入一个定时器(InactivityTimer)。当该定时器运行时，终端可以根据监测周期相对较小的搜索空间组，例如第一搜索空间组监听PDCCH。当该定时器超时后，终端可以切换到监测周期相对较大的搜索空间组，例如第二搜索空间组。上述定时器可以被称为第一搜索空间组定时器。
一种触发启动或重启第一搜索空间组定时器的可能的条件是：终端在第一搜索空间组或第二搜索空间组的搜索空间内监听到任意一个DCI format。
在本申请实施例的一种可能的实现方式中，终端可以在满足如下任一条件时，启动或重启第一搜索空间组定时器：
ra-ContentionResolutionTimer启动时、终端成功接收到基站发送的RAR后，或者，非连续接收的重传定时器启动时。
示例性的，以非连续接收的上行链路重传定时器(drx-RetransmissionTimerUL)为例，如图13所示，是本申请实施例提供的一种第一搜索空间组定时器的启动或重启过程示意图。在图13中，当第一搜索空间组定时器启动时，终端根据第一搜索空间组监测PDCCH。在第一搜索空间组定时器运行过程中，当非连续接收的上行链路重传定时器启动时，第一搜索空间组定时器重启，终端继续根据第一搜索空间组监测PDCCH。在非连续接收的上行链路重传定时器超时后，若第一搜索空间组定时器仍在运行中，终端将继续根据第一搜索空间组监测PDCCH，直到第一搜索空间组定时器超时后，终端开始根据第二搜索空间组监测PDCCH。
在本申请实施例的另一种可能的实现方式中，第一搜索空间组定时器可以按照设定的启动或重启机制运行。但在满足如下任一条件时，第一搜索空间组定时器超时后，终端延后对第一搜索空间组进行切换。即，在满足如下任一条件时，第一搜索空间组定时器超时后，终端仍然根据第一搜索空间组监测PDCCH，而不切换至第二搜索空间组：
条件1、在ra-ContentionResolutionTimer运行时，第一搜索空间组定时器超时。
终端在ra-ContentionResolutionTimer运行期间，不管第一搜索空间组定时器是否超时，终端都根据第一搜索空间组监测PDCCH。如果终端在ra-ContentionResolutionTimer运行期间没有收到C-RNTI加扰的PDCCH，则在ra-ContentionResolutionTimer超时后，终端切换至第二搜索空间组；否则，终端会在监听到C-RNTI加扰的PDCCH时启动或重 启第一搜索空间组定时器。
条件2、在非连续接收的重传定时器运行时，第一搜索空间组定时器超时。
终端在非连续接收的重传定时器运行期间，不管第一搜索空间组定时器是否超时，终端都根据第一搜索空间组监测PDCCH。如果终端在非连续接收的重传定时器运行期间没有接收收到调度重传数据的PDCCH，且在第一搜索空间组的各个搜索空间内也没有监听到其他任意的DCI format，则在非连续接收的重传定时器超时后，终端切换至第二搜索空间组；否则，终端会在第一搜索空间组的各个搜索空间内监听到调度重传数据的PDCCH时(或监听到任意一个DCI format时)启动或重启第一搜索空间组定时器。
示例性的，以非连续接收的上行链路重传定时器(drx-RetransmissionTimerUL)为例，如图14所示，是本申请实施例提供的另一种第一搜索空间组定时器的启动或重启过程示意图。在图14中，当第一搜索空间组定时器启动时，终端根据第一搜索空间组监测PDCCH。在第一搜索空间组定时器运行过程中，当非连续接收的上行链路重传定时器启动时，终端继续根据第一搜索空间组监测PDCCH。在第一搜索空间组定时器超时后，若非连续接收的上行链路重传定时器仍在运行中，终端将继续根据第一搜索空间组监测PDCCH。如果在非连续接收的上行链路重传定时器运行期间，第一搜索空间组定时器没有重启，则直到非连续接收的上行链路重传定时器超时后，终端开始根据第二搜索空间组监测PDCCH。
条件3、终端成功接收到基站发送的RAR之后，在还未接收到新传的数据之前，第一搜索空间组定时器超时。
在这种情况下，第一搜索空间组定时器超时后，终端不执行搜索空间组的切换，仍然根据第一搜索空间组监测PDCCH。终端在接收到指示新传数据的PDCCH之后，启动或重启第一搜索空间组定时器。
在本申请实施例的一种可能的实现方式中，S401、S601中的第一搜索空间组和第二搜索空间组的配置具有嵌套关系。
在具体实现中，基站在为终端配置第一搜索空间组的第一配置参数和第二搜索空间组的第二配置参数时，可以对第一配置参数和第二配置参数的取值进行限制，从而使得第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，使得第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。或者可以描述为，基站可以对第一配置参数和第二配置参数的取值进行限制，从而使得第二搜索空间组的时域监测位置为第一搜索空间组时域监测位置的子集；和/或，第二搜索空间组的频域监测位置为第一搜索空间组频域监测位置的子集。
在本申请实施例的一种可能的实现方式中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测周期，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测周期。因此，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，可以是指：第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍。
其中，第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍，可以理解为第二搜索空间组包含的一个搜索空间的监测周期为第一搜索空间组包含的一个搜索空间的监测周期的整数倍。
在本申请实施例的一种可能的实现方式中，第二搜索空间组包含的每一个搜索空间 的监测周期都为第一搜索空间组包括的某一个搜索空间的监测周期的整数倍。
示例性的，第一搜索空间组包含第一搜索空间和第二搜索空间，第二搜索空间组包含第三搜索空间、第四搜索空间和第五搜索空间。其中，第一搜索空间和第二搜索空间的监测周期可以分别是3个时隙和4个时隙。对应地，第三搜索空间、第四搜索空间和第五搜索空间的监测周期可以分别是6个时隙、9个时隙和12个时隙。在此情况下，第二搜索空间组中的每一个搜索空间(第三搜索空间、第四搜索空间和第五搜索空间)的监测周期都为第一搜索空间组中的某一个搜索空间(第一搜索空间)的监测周期的整数倍。
在本申请实施例的另一种可能的实现方式中，第二搜索空间组包含的多个搜索空间中，部分搜索空间的监测周期为第一搜索空间组中某一个搜索空间的监测周期的整数倍。
示例性的，第一搜索空间组包含第一搜索空间和第二搜索空间，第二搜索空间组包含第三搜索空间、第四搜索空间和第五搜索空间。其中，第一搜索空间和第二搜索空间的监测周期可以分别是3个时隙和4个时隙。对应地，第三搜索空间、第四搜索空间和第五搜索空间的监测周期可以分别是6个时隙、9个时隙和10个时隙。在此情况下，第二搜索空间组中的部分搜索空间(第三搜索空间和第四搜索空间)的监测周期为第一搜索空间组中的某一个搜索空间(第一搜索空间)的监测周期的整数倍。以需要监测的时隙的监测周期以及偏移值(monitoringSlotPeriodicityAndOffset)为例，可以将第二搜索空间组中包括的搜索空间的监测周期配置为5个时隙(slot)，将第一搜索空间组中包括的搜索空间的监测周期配置为1个slot；或者，将第二搜索空间组中包括的搜索空间的监测周期配置为6个slot，将第一搜索空间组中包括的搜索空间的监测周期配置为2个slot。这样，通过将第二搜索空间组的监测周期配置为第一搜索空间组的监测周期的整数倍，可以达到这样的目的：终端根据第一搜索空间组的监测周期得到的监测时隙集合，属于根据第二搜索空间组的监测周期得到的监测时隙集合的子集。
这样，在由于某些错误情况导致基站和终端的时隙没有对齐时(例如在前述实施例S502中，终端在发送SR后，开始根据第一搜索空间组监测PDCCH，但由于基站可能没能成功接收到终端发送的SR，基站可能认为终端仍然在使用第二搜索空间组监测PDCCH)，基站发送的调度信息可以被终端接收到。
在本申请实施例的另一种可能的实现方式中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测符号集合，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测符号集合。因此，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，可以是指：第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集合的子集。
其中，第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集合的子集，可以理解为第二搜索空间组包含的一个搜索空间的监测符号集合为第一搜索空间组包含的一个搜索空间的监测符号集合的子集。
在本申请实施例中，每个搜索空间的监测符号集合可以是根据该搜索空间关联的CORESET的duration和monitoringSymbolsWithinSlot确定的。因此，基站在为第一搜索空间组和第二搜索空间组配置参数时，可以在将第二搜索空间组中包括的搜索空间的监测周期配置为第一搜索空间组的监测周期的整数倍的基础上，将第二搜索空间组包括的搜索空间中根据CORESET的duration和monitoringSymbolsWithinSlot确定的需要监测的 符号集合，配置为第一搜索空间组包括的搜索空间中根据CORESET的duration和monitoringSymbolsWithinSlot确定的需要监测的符号集合的子集。
在本申请实施例的一种可能的实现方式中，第一配置参数中与频域监测相关的参数包括第一搜索空间组的频域监测位置集合，第二配置参数中与频域监测相关的参数包括第二搜索空间组的频域监测位置集合。因此，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集，可以是指：第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监测位置集合的子集。
其中，第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监测位置集合的子集，可以理解为第二搜索空间组包含的一个搜索空间的频域监测位置集合为第一搜索空间组包含的一个搜索空间的频域监测位置集合的子集。
在本申请实施例中，每个搜索空间组的频域监测位置集合可以是指各个聚合等级需要盲检的PDCCH候选位置的个数(nrofCandidates)，即aggregationLevelx的取值。
若第二搜索空间组中aggregationLevelx的取值被配置为{aggregationLevel1＝n8,aggregationLevel2＝n4,aggregationLevel4＝n4,aggregationLevel8＝n2,aggregationLevel16＝n0}，则第一搜索空间组中aggregationLevelx的取值可以被配置为{aggregationLevel1＝n8,aggregationLevel2＝n6,aggregationLevel4＝n6,aggregationLevel8＝n4,aggregationLevel16＝n2}。
即，通过将监测周期相对较大的第二搜索空间组中各个聚合等级需要盲检的PDCCH候选位置的个数配置为大于或等于监测周期相对较小的第一搜索空间组中各个聚合等级需要盲检的PDCCH候选位置的个数，可以达到这样的目的：终端根据第二搜索空间组得到的频域监测位置集合，属于根据第一搜索空间组得到的频域监测位置集合的子集。
在上述实施例中，可选的，为了保证各个聚合等级需要盲检的PDCCH候选位置的个数呈嵌套关系，可以约束第二搜索空间组关联的CORESET与第一搜索空间组关联的CORESET相同。或者，可以表述为第二搜索空间组包含的一个搜索空间关联的CORESET与第一搜索空间组包含的一个搜索空间关联的CORESET相同。
在本申请实施例中，通过对第一搜索空间组的第一配置参数和第二搜索空间组的第二配置参数的取值进行限制，可以使得第二搜索空间组的监测位置都属于第一搜索空间组的监测位置，从而可以避免在基站和终端的时隙未对齐的情况下，丢失调度，保证基站或终端发送的调度信息可以成功地被对方接收到，提高调度信息发送的成功率。
为了便于理解，下面分别以几个具体的示例，对本申请实施例提供的PDCCH监测方法进行介绍。
在如下的各个示例中，基站可以预先为终端配置两个搜索空间组：组0和组1；其中，组0可以是前述各个实施例中的第一搜索空间组，组1可以是前述各个实施例中的第二搜索空间组，组0的监测周期小于组1的监测周期。组0和组1包含的搜索空间都属于用户设备特定搜索空间UESS，终端还需要在公共搜索空间CSS中监测PDCCH。
示例一：
当终端根据组1监测PDCCH时，如果接收到目标DCI，则终端从组1切换至组0，开始根据组0监测PDCCH；其中，目标DCI至少需要满足如下条件之一：
目标DCI为使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI；或者，
目标DCI为在UESS中使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI；或者，
目标DCI为在UESS或CSS type 3中使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI。
在本示例中，从搜索空间组1切换为搜索空间组0(即从大监测周期的搜索空间组切换为小监测周期的搜索空间组)的一个可能的原因是终端的数据到达后，从大监测周期变为小监测周期，从而有助于快速进行数据调度。而“数据到达”的标志之一就是终端接收到scheduling DCI。在当前标准中，scheduling DCI对应的是使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI。
当前标准中，终端可以在UESS和CSS type 3中监测使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI。因此，上述使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI可以是在UESS或CSS type 3中监测到的DCI。
由于除UESS外，终端始终会监测CSS。因此，还可以对监测到上述使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI所在的搜索空间进行判断。例如，仅在UESS中监测到使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI时，终端才从搜索空间组1切换为搜索空间组0。在CSS中监测到使用C-RNTI、MCS-C-RNTI或CS-RNTI加扰的DCI时，终端不切换搜索空间组。这样，可以更灵活地适配数据量的大小。例如，当终端有大量数据到达时，在UESS中调度终端，然后终端从搜索空间组1切换为搜索空间组0，从而快速进行数据调度。如果终端只有少量数据到达，可以在CSS中调度终端，终端在完成数据传输后，仍然可以根据搜索空间组1(以较大的监测周期)监测PDCCH，从而减少终端功耗，降低信令开销。可以理解的是，本申请实施例对搜索空间组1和搜索空间组0的监测周期，及两者之间的关系不做限定。
示例二：
当终端根据搜索空间组1监测PDCCH时，如果终端发送了PRACH，则终端可以从搜索空间组1切换为搜索空间组0。
在本示例中，从搜索空间组1切换为搜索空间组0(即从大监测周期的搜索空间组切换为小监测周期的搜索空间组)的一个可能的原因是在终端出现一些异常状态时，终端应该切换为较小的监测周期来监测PDCCH，以便快速恢复。异常状态可能包括：radio link failure、beam failure或上行失步等。在这些情况下，终端会发起随机接入流程以恢复正常。此时恢复正常状态的优先级应该大于节能。因此，终端应当切换回搜索空间组0。而上述异常状态恢复的第一步都是终端向基站发送PRACH。因此，可以将PRACH作为一个可能的判断条件，在该条件下终端切换回搜索空间组0。
在本示例中，终端开始根据搜索空间组0监测PDCCH的具体时间可以进一步细化。
例如：在终端发送PRACH的下一个时隙开始根据搜索空间组0监测PDCCH，比较简单易行；或者，终端接收到了RA-RNTI加扰的DCI，且该DCI对应非竞争接入，在该DCI之后(例如该DCI的下一个时隙)开始根据搜索空间组0监测PDCCH。可以理解的是，本申请实施例对搜索空间组1和搜索空间组0的监测周期，及两者之间的关系不做限定。
终端发送完PRACH之后，会接收基站发送的RAR，RAR是使用RA-RNTI加扰的DCI调度的。在非竞争接入的情况下，在终端接收到RA-RNTI加扰的DCI之后，就表示终端已经接入成功。在此之后，终端一般就会开始数据调度。而RA-RNTI加扰的DCI在CSS type 1中，是不受搜索空间组0或搜索空间组1切换影响的。因此，可以在终端 接收到RA-RNTI加扰的DCI之后，切换回搜索空间组0。可以理解的是，本申请实施例对搜索空间组1和搜索空间组0的监测周期，及两者之间的关系不做限定。
示例三：
在上述示例二中，针对基于非竞争解决的RACH(contention-free based RACH，CFRA)流程，终端在接收到使用RA-RNTI加扰的PDCCH后，由搜索空间组1切换为搜索空间组0。考虑到终端对RAR的解析时间，会有一个生效时延(在接收到RAR之后多久开始切换到搜索空间组0)。终端在接收到使用RA-RNTI加扰的PDCCH，并不代表RACH成功。因为该PDCCH调度的PDSCH可能并不包含该终端的RAR。此时，RAR其实是接收失败的，RACH也未成功。(RA-RNTI调度的PDSCH可能携带多个终端的RAR)。
因此，在本示例中，终端可以在接收到RAR之后的N个时间单元之后，切换搜索空间组，开始根据搜索空间组0监听PDCCH；或者，终端可以在接收到RAR之后的N个时间单元之后的第一个时隙切换搜索空间组，开始根据搜索空间组0监听PDCCH。可以理解的是，本申请实施例对搜索空间组1和搜索空间组0的监测周期，及两者之间的关系不做限定。
示例四：
在上述示例二中，终端在发送了PRACH(第一信号)后，由搜索空间组1切换为搜索空间组0。本示例针对RRC连接态的基于竞争解决的RACH流程，在示例二的基础上，增加了另一个触发终端切换搜索空间组的条件。即，终端在向基站发送第二信号后，由搜索空间组1切换为搜索空间组0。其中，终端向基站发送第二信号的过程，可以是指终端在向基站发送第一信号并接收到基站针对第一信号返回的RAR后，终端向基站发送信号的过程。
在本示例中，终端在RRC连接态发起基于竞争解决的RACH流程(CBRA，即：第二信号中包括C-RNTI MAC CE)可能是发生了波束失败，终端请求波束恢复(beam failure recovery,BFR)，或者终端请求上行资源调度，或者是终端收到了基站的PDCCH指令(PDCCH order)。
在本示例中，针对基于竞争解决的RACH流程，如果第二信号中包括C-RNTI MAC CE，若终端当前是根据监测周期相对较大的搜索空间组1监测PDCCH，则在终端发送第二信号后，可以切换至监测周期相对较小的搜索空间组0监测PDCCH。
或者，当ra-ContentionResolutionTimer运行时，终端可以切换至搜索空间组0监测PDCCH。可以理解的是，本申请实施例对搜索空间组1和搜索空间组0的监测周期，及两者之间的关系不做限定。
示例五：
当终端根据搜索空间组1监测PDCCH时，如果终端发送了PRACH或SR，则终端可以从搜索空间组1切换为搜索空间组0。
在本示例中，终端开始根据搜索空间组0监测PDCCH的具体时间可以进一步细化。例如，在终端发送PRACH或SR的下一个时隙开始根据搜索空间组0监测PDCCH。
示例一中针对的是下行数据到达的情况。当上行数据到达后，终端也应该从大监测周期的搜索空间组切换为小监测周期的搜索空间组，从而快速进行数据调度。由于上行数据到达后，终端请求上行资源的方法可以包括如下两种：终端发送SR；或者，终端发送PRACH。因此，在本示例中，可以将这二者都作为终端从搜索空间组1切换回搜索空 间组0的条件。可以理解的是，本申请实施例对搜索空间组1和搜索空间组0的监测周期，及两者之间的关系不做限定。
示例六：
基站在为终端配置搜索空间组时，可以针对搜索空间组0配置一定时器SSSG0-InactivityTimer，当该定时器运行时，终端根据搜索空间组0监测PDCCH；当该定时器超时后，终端切换至搜索空间组1，使用监测周期相对较大的搜索空间组监测PDCCH。
另一方面，针对半静态调度的场景，在半静态调度期间，可能会触发DRX重传定时器的启动，在DRX重传定时器运行时，可能存在重传数据，终端需要监听使用CS-RNTI加扰的PDCCH。那么，在相应的重传定时器运行时，如果终端根据监测周期相对较大的搜索空间组1监测PDCCH，可能会增加重传调度时延。
因此，在本示例中，当重传定时器运行时，终端可以切换至监测周期相对较小的搜索空间组0监听PDCCH，以减少数据时延；若终端在重传定时器运行期间，在搜索空间组0内未监听到任何DCI，则在上述重传定时器超时后，终端可以对搜索空间组进行切换，由监测周期相对较小的搜索空间组0切换至监测周期相对较大的搜索空间组1，根据搜索空间组1监听PDCCH，以节省终端的功耗。可以理解的是，本申请实施例对搜索空间组1和搜索空间组0的监测周期，及两者之间的关系不做限定。
示例七：
在上述示例一至示例六中，基站在为终端配置搜索空间组时，还可以对搜索空间组的配置参数的取值进行限制，使得搜索空间组0和搜索空间组1的配置参数具有嵌套关系，使得搜索空间组1的监测位置都属于搜索空间组0的监测位置。即，搜索空间组1的监测位置为搜索空间组0的监测位置的子集。
这样，当由于某些错误情况导致基站和终端的时隙两侧没有对齐时，基站发送的调度信息也能够被终端接收到。
例如，在时间维度上，可以将组1中的搜索空间的监测周期配置为5个时隙(slot)，将组0中的搜索空间的监测周期配置为1个slot；或者，将组1中的搜索空间的监测周期配置为6个slot，将组0中的搜索空间的监测周期配置为2个slot。这样，组1中的搜索空间的监测周期为组0中的搜索空间的监测周期的整数倍，从而终端根据组1的监测周期得到的监测时隙集合，属于根据组0的监测周期得到的监测时隙集合的子集。
在上述监测周期配置的基础上，还可以将组1中需要监测的符号集合，配置为组0中需要监测的符号集合的子集。
又例如，在频率维度上，可以将组0和组1包括的搜索空间关联的CORESET配置为相同，同时再将监测周期相对较大的组1中的搜索空间的各个聚合等级需要盲检的PDCCH候选位置的个数配置为大于或等于监测周期相对较小的组0中的搜索空间的各个聚合等级需要盲检的PDCCH候选位置的个数。这样，终端根据组1得到的频域监测位置集合，属于根据组0得到的频域监测位置集合的子集。
可以理解的是，本申请实施例对搜索空间组1和搜索空间组0的监测周期，及两者之间的关系不做限定。
上述主要从每一个网元之间交互的角度对本申请实施例提供的方法进行了介绍。可以理解的是，每一个网元，例如终端和网络设备，为了实现上述功能，其包含了执行每 一个功能相应的硬件结构或软件模块，或两者的结合。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件，或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对终端进行功能模块的划分，例如，可以对应每一个功能划分每一个功能模块，也可以将一个或多个的功能集成在一个功能模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。下面以将一个或多个的功能集成在一个功能模块为例进行说明：
图15为本申请实施例提供的一种通信装置的结构示意图。如图15所示，该通信装置包括通信模块1501和处理模块1502。
可选地，该通信装置至少可以执行以下方案之一：
方案一、通信模块1501，用于接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息。
处理模块1502，用于在终端根据第二搜索空间组监测PDCCH时，若终端接收到用于数据调度的下行控制信息DCI，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
一种可能的实现方式中，用于数据调度的下行控制信息DCI包括使用如下任意一种RNTI加扰的DCI：
小区无线网络临时标识C-RNTI、调制与编码策略无线网络临时标识MCS-C-RNTI，或配置调度无线网络临时标识CS-RNTI。
一种可能的实现方式中，用于数据调度的下行控制信息DCI为用户设备特定搜索空间UESS内的DCI或第三类型公共搜索空间CSS type 3内的DCI。
一种可能的实现方式中，第一搜索空间组具有第一配置参数，第二搜索空间组具有第二配置参数；第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。
一种可能的实现方式中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测周期，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测周期；相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，可以为：第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍。
一种可能的实现方式中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测符号集合，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测符号集合；相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，可以为：第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集合的子集。
一种可能的实现方式中，第一配置参数中与频域监测相关的参数包括第一搜索空间 组的频域监测位置集合，第二配置参数中与频域监测相关的参数包括第二搜索空间组的频域监测位置集合；相应的，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集，可以为：第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监测位置集合的子集。
其中，用于数据调度的下行控制信息DCI、第一配置参数，以及第二配置参数的相关信息可以参见图4所示的实施例，在此不再赘述。
方案二、通信模块1501，用于接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；
处理模块1502，用于在终端根据第二搜索空间组监测PDCCH时，若终端向网络设备发送第一信号，在发送第一信号后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，第一信号至少包括如下信号或信道中的其中一种：随机接入前导preamble码、调度请求SR、混合自动重传请求否定应答NACK，和/或物理上行共享信道PUSCH。
一种可能的实现方式中，处理模块1502，用于在终端发送preamble码后的下一个时隙，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
一种可能的实现方式中，处理模块1502，用于在终端接收到使用随机接入无线网络临时标识RA-RNTI加扰的DCI；若preamble码用于非竞争接入，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
一种可能的实现方式中，处理模块1502，用于在终端接收到网络设备针对第一信号返回的随机接入响应RAR；若preamble码用于非竞争接入，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
一种可能的实现方式中，处理模块1502，用于在终端接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后，或，在终端接收到网络设备针对第一信号返回的随机接入响应RAR之后的预设个数的时间单元后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
其中，时间单元包括如下的任意一种：
正交频分复用OFDM符号、时隙，或者，毫秒。
一种可能的实现方式中，处理模块1502，用于在终端接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后的第一个时隙，或，在终端接收到网络设备针对第一信号返回的随机接入响应RAR之后的预设个数的时间单元后的第一个时隙，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
一种可能的实现方式中，处理模块1502，用于在终端接收到网络设备针对第一信号返回的随机接入响应RAR后，终端向网络设备发送第二信号；若preamble码用于竞争接入，且第二信号包括C-RNTI MAC控制元素，则在终端发送第二信号后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
一种可能的实现方式中，处理模块1502，用于在终端发送第二信号后，当随机接入竞争解决定时器运行时，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
一种可能的实现方式中，处理模块1502，用于在重传定时器运行时，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH；其中，重传定时器包 括非连续接收的下行链路重传定时器或非连续接收的上行链路重传定时器。
一种可能的实现方式中，第一搜索空间组具有第一配置参数，第二搜索空间组具有第二配置参数；第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。
一种可能的实现方式中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测周期，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测周期；相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，可以为：第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍。
一种可能的实现方式中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测符号集合，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测符号集合；相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，可以为：第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集合的子集。
一种可能的实现方式中，第一配置参数中与频域监测相关的参数包括第一搜索空间组的频域监测位置集合，第二配置参数中与频域监测相关的参数包括第二搜索空间组的频域监测位置集合；相应的，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集，可以为：第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监测位置集合的子集。
其中，第一信号、第二信号、第一配置参数，以及第二配置参数的相关信息可以参见图6所示的实施例，在此不再赘述。
作为一个示例，结合图3所示的终端，图15中的通信模块1501可以由图3中的通信接口304来实现，图15中的处理模块1502可以由图3中的处理器301来实现，本申请实施例对此不作任何限定。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机指令；当所述计算机可读存储介质在通信装置上运行时，使得该通信装置执行如图4或者图6所示的方法。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
本申请实施例还提供了一种包含计算机指令的计算机程序产品，当其在终端上运行时，使得终端可以执行图4或者图6所示的方法。
本申请实施例还提供一种通信系统，该通信系统包括网络设备和终端，该终端用于执行图4或者图6所示的方法。
图16为本申请实施例提供的一种芯片的结构示意图。图16所示的芯片可以为通用处理器，也可以为专用处理器。该芯片包括处理器1601。其中，处理器1601用于支持 通信装置执行图4或者图6所示的方法。
可选的，该芯片还包括收发器1602，收发器1602用于接受处理器1601的控制，用于支持通信装置执行图4或者图6所示的方法。
可选的，图16所示的芯片还可以包括：存储介质1603。
需要说明的是，图16所示的芯片可以使用下述电路或者器件来实现：一个或多个现场可编程门阵列(field programmable gate array，FPGA)、可编程逻辑器件(programmable logic device，PLD)、控制器、状态机、门逻辑、分立硬件部件、任何其他适合的电路、或者能够执行本申请通篇所描述的各种功能的电路的任意组合。
上述本申请实施例提供的终端、网络设备、计算机存储介质、计算机程序产品、芯片均用于执行上文所提供的方法，因此，其所能达到的有益效果可参考上文所提供的方法对应的有益效果，在此不再赘述。
结合以上，本申请提供如下实施例：
实施例1、一种物理下行控制信道PDCCH监测方法，其中，所述方法应用于终端，所述方法包括：
终端接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；
在终端根据第二搜索空间组监测PDCCH时，若终端接收到用于数据调度的下行控制信息DCI，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例2、根据实施例1所述的方法，其中，用于数据调度的下行控制信息DCI包括使用如下任意一种无线网络临时标识RNTI加扰的DCI：
小区无线网络临时标识C-RNTI、调制与编码策略无线网络临时标识MCS-C-RNTI，或配置调度无线网络临时标识CS-RNTI。
实施例3、根据实施例2所述的方法，其中，用于数据调度的下行控制信息DCI为用户设备特定搜索空间UESS内的DCI或第三类型公共搜索空间CSS type 3内的DCI。
实施例4、根据实施例1-实施例3任一实施例所述的方法，其中，第一搜索空间组具有第一配置参数，第二搜索空间组具有第二配置参数；第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。
实施例5、根据实施例4所述的方法，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测周期，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测周期。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍。
实施例6、根据实施例4所述的方法，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测符号集合，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测符号集合。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集 合的子集。
实施例7、根据实施例4所述的方法，其中，第一配置参数中与频域监测相关的参数包括第一搜索空间组的频域监测位置集合，第二配置参数中与频域监测相关的参数包括第二搜索空间组的频域监测位置集合。
相应的，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集，包括：第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监测位置集合的子集。
实施例8、一种通信装置，其中，该通信装置可以为终端或者终端中的芯片或者片上系统，该通信装置包括：处理器和存储器，存储器存储有指令，当指令被处理器执行时，使得通信装置执行以下步骤：接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；在终端根据第二搜索空间组监测PDCCH时，若终端接收到用于数据调度的下行控制信息DCI，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例9、根据实施例8所述的通信装置，其中，用于数据调度的下行控制信息DCI包括使用如下任意一种无线网络临时标识RNTI加扰的DCI：
小区无线网络临时标识C-RNTI、调制与编码策略无线网络临时标识MCS-C-RNTI，或配置调度无线网络临时标识CS-RNTI。
实施例10、根据实施例9所述的通信装置，其中，用于数据调度的下行控制信息DCI为用户设备特定搜索空间UESS内的DCI或第三类型公共搜索空间CSS type 3内的DCI。
实施例11、根据实施例8-实施例10任一实施例所述的通信装置，其中，第一搜索空间组具有第一配置参数，第二搜索空间组具有第二配置参数；第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。
实施例12、根据实施例11所述的通信装置，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测周期，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测周期。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍。
实施例13、根据实施例11所述的通信装置，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测符号集合，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测符号集合。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集合的子集。
实施例14、根据实施例11所述的通信装置，其中，第一配置参数中与频域监测相关的参数包括第一搜索空间组的频域监测位置集合，第二配置参数中与频域监测相关的参数包括第二搜索空间组的频域监测位置集合。
相应的，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集，包括：第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监 测位置集合的子集。
实施例15、一种通信装置，其中，该通信装置包括：通信模块和处理模块。通信模块，用于接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息。处理模块，用于在终端根据第二搜索空间组监测PDCCH时，若终端接收到用于数据调度的下行控制信息DCI，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例16、根据实施例15所述的通信装置，其中，用于数据调度的下行控制信息DCI包括使用如下任意一种无线网络临时标识RNTI加扰的DCI：
小区无线网络临时标识C-RNTI、调制与编码策略无线网络临时标识MCS-C-RNTI，或配置调度无线网络临时标识CS-RNTI。
实施例17、根据实施例16所述的通信装置，其中，用于数据调度的下行控制信息DCI为用户设备特定搜索空间UESS内的DCI或第三类型公共搜索空间CSS type 3内的DCI。
实施例18、根据实施例15-实施例17任一实施例所述的通信装置，其中，第一搜索空间组具有第一配置参数，第二搜索空间组具有第二配置参数；第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。
实施例19、根据实施例18所述的通信装置，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测周期，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测周期。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍。
实施例20、根据实施例18所述的通信装置，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测符号集合，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测符号集合。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集合的子集。
实施例21、根据实施例18所述的通信装置，其中，第一配置参数中与频域监测相关的参数包括第一搜索空间组的频域监测位置集合，第二配置参数中与频域监测相关的参数包括第二搜索空间组的频域监测位置集合。
相应的，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集，包括：第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监测位置集合的子集。
实施例22、一种物理下行控制信道PDCCH监测方法，其中，所述方法应用于终端，所述方法包括：
终端接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；
在终端根据第二搜索空间组监测PDCCH时，若终端向网络设备发送第一信号，在 发送第一信号后，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，第一信号至少包括如下信号或信道中的其中一种：随机接入前导preamble码、调度请求SR、混合自动重传请求否定应答NACK，和/或物理上行共享信道PUSCH。
实施例23、根据实施例22所述的方法，其中，在发送第一信号后，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，包括：
在发送preamble码后的下一个时隙，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例24、根据实施例22所述的方法，其中，在发送第一信号后，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，包括：
终端接收到使用随机接入无线网络临时标识RA-RNTI加扰的DCI；
若preamble码用于非竞争接入，则终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例25、根据实施例22所述的方法，其中，在发送第一信号后，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，包括：
终端接收到网络设备针对第一信号返回的随机接入响应RAR；
若preamble码用于非竞争接入，则终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例26、根据实施例24或实施例25所述的方法，其中，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，包括：
终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后，或，终端在接收到网络设备针对第一信号返回的随机接入响应RAR之后的预设个数的时间单元后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例27、根据实施例26所述的方法，其中，时间单元包括如下的任意一种：正交频分复用OFDM符号、时隙，或者，毫秒。
实施例28、根据实施例26所述的方法，其中，终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后，或，终端在接收到网络设备针对第一信号返回的随机接入响应RAR之后的预设个数的时间单元后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，包括：
终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后的第一个时隙，或，终端在接收到网络设备针对第一信号返回的随机接入响应RAR之后的预设个数的时间单元后的第一个时隙，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例29、根据实施例22所述的方法，其中，在发送第一信号后，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，包括：
在接收到网络设备针对第一信号返回的随机接入响应RAR后，终端向网络设备发送第二信号；
若preamble码用于竞争接入，且第二信号包括C-RNTI MAC控制元素，则在发送第二信号后，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例30、根据实施例29所述的方法，其中，若preamble码用于竞争接入，且第 二信号包括C-RNTI MAC控制元素，则在发送第二信号后，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，包括：
在发送第二信号后，当随机接入竞争解决定时器运行时，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例31、根据实施例22所述的方法，其中，终端配置有重传定时器，在发送第一信号后，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，包括：
当重传定时器运行时，终端停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH；其中，重传定时器包括非连续接收的下行链路重传定时器或非连续接收的上行链路重传定时器。
实施例32、根据实施例22-实施例25或实施例27-实施例31任一实施例所述的方法，其中，第一搜索空间组具有第一配置参数，第二搜索空间组具有第二配置参数；第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。
实施例33、根据实施例32所述的方法，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测周期，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测周期。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍。
实施例34、根据实施例22所述的方法，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测符号集合，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测符号集合。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集合的子集。
实施例35、根据实施例34所述的方法，其中，第一配置参数中与频域监测相关的参数包括第一搜索空间组的频域监测位置集合，第二配置参数中与频域监测相关的参数包括第二搜索空间组的频域监测位置集合。
相应的，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集，包括：第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监测位置集合的子集。
实施例36、一种通信装置，其中，该通信装置可以为终端或者终端中的芯片或者片上系统，该通信装置包括：处理器和存储器，存储器存储有指令，当指令被处理器执行时，使得通信装置执行以下步骤：接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；在终端根据第二搜索空间组监测PDCCH时，若终端向网络设备发送第一信号，在终端发送第一信号后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，第一信号至少包括如下信号或信道中的其中一种：随机接入前导preamble码、调度请求SR、混合自动重传请求否定应答NACK，和/或物理上行共享信道PUSCH。
实施例37、根据实施例36所述的通信装置，其中，当指令被处理器执行时，使得通信装置还执行以下步骤：在终端发送preamble码后的下一个时隙，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例38、根据实施例36所述的通信装置，其中，当指令被处理器执行时，使得通信装置还执行以下步骤：终端接收到使用随机接入无线网络临时标识RA-RNTI加扰的DCI；若preamble码用于非竞争接入，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例39、根据实施例36所述的通信装置，其中，当指令被处理器执行时，使得通信装置还执行以下步骤：终端接收到网络设备针对第一信号返回的随机接入响应RAR；若preamble码用于非竞争接入，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例40、根据实施例38或实施例39所述的通信装置，其中，当指令被处理器执行时，使得通信装置还执行以下步骤：终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后，或，终端在接收到网络设备针对第一信号返回的随机接入响应RAR之后的预设个数的时间单元后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例41、根据实施例40所述的通信装置，其中，时间单元包括如下的任意一种：正交频分复用OFDM符号、时隙，或者，毫秒。
实施例42、根据实施例40所述的通信装置，其中，当指令被处理器执行时，使得通信装置还执行以下步骤：终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后的第一个时隙，或，终端在接收到网络设备针对第一信号返回的随机接入响应RAR之后的预设个数的时间单元后的第一个时隙，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例43、根据实施例36所述的通信装置，其中，当指令被处理器执行时，使得通信装置还执行以下步骤：在终端接收到网络设备针对第一信号返回的随机接入响应RAR后，向网络设备发送第二信号；若preamble码用于竞争接入，且第二信号包括C-RNTI MAC控制元素，则在发送第二信号后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例44、根据实施例43所述的通信装置，其中，当指令被处理器执行时，使得通信装置还执行以下步骤：在终端发送第二信号后，当随机接入竞争解决定时器运行时，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例45、根据实施例36所述的通信装置，其中，终端配置有重传定时器，当指令被处理器执行时，使得通信装置还执行以下步骤：当重传定时器运行时，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH；其中，重传定时器包括非连续接收的下行链路重传定时器或非连续接收的上行链路重传定时器。
实施例46、根据实施例36-实施例39或实施例41-实施例45任一实施例所述的通信装置，其中，第一搜索空间组具有第一配置参数，第二搜索空间组具有第二配置参数；第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。
实施例47、根据实施例46所述的通信装置，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测周期，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测周期。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍。
实施例48、根据实施例36所述的通信装置，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测符号集合，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测符号集合。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集合的子集。
实施例49、根据实施例48所述的通信装置，其中，第一配置参数中与频域监测相关的参数包括第一搜索空间组的频域监测位置集合，第二配置参数中与频域监测相关的参数包括第二搜索空间组的频域监测位置集合。
相应的，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集，包括：第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监测位置集合的子集。
实施例50、一种通信装置，其中，该通信装置包括：通信模块和处理模块。通信模块，用于接收网络设备配置的搜索空间信息，搜索空间信息包括第一搜索空间组和第二搜索空间组的信息。处理模块，用于在终端根据第二搜索空间组监测PDCCH时，若终端向网络设备发送第一信号，在发送第一信号后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH，第一信号至少包括如下信号或信道中的其中一种：随机接入前导preamble码、调度请求SR、混合自动重传请求否定应答NACK，和/或物理上行共享信道PUSCH。
实施例51、根据实施例50所述的通信装置，其中，处理模块，还用于在终端发送preamble码后的下一个时隙，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例52、根据实施例50所述的通信装置，其中，处理模块，还用于在终端接收到使用随机接入无线网络临时标识RA-RNTI加扰的DCI；若preamble码用于非竞争接入，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例53、根据实施例50所述的通信装置，其中，处理模块，还用于在终端接收到网络设备针对第一信号返回的随机接入响应RAR；若preamble码用于非竞争接入，则停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例54、根据实施例52或实施例53所述的通信装置，其中，处理模块，还用于在终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后，或，终端在接收到网络设备针对第一信号返回的随机接入响应RAR之后的预设个数的时间单元后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例55、根据实施例54所述的通信装置，其中，时间单元包括如下的任意一种：正交频分复用OFDM符号、时隙，或者，毫秒。
实施例56、根据实施例54所述的通信装置，其中，处理模块，还用于在终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后的第一个时隙，或，终端在接收到网络设备针对第一信号返回的随机接入响应RAR之后的预设个数的时间单元后的第一个时隙，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例57、根据实施例50所述的通信装置，其中，处理模块，还用于在终端接收到网络设备针对第一信号返回的随机接入响应RAR后，向网络设备发送第二信号；若preamble码用于竞争接入，且第二信号包括C-RNTI MAC控制元素，则在发送第二信号后，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例58、根据实施例57所述的通信装置，其中，处理模块，还用于在终端发送第二信号后，当随机接入竞争解决定时器运行时，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH。
实施例59、根据实施例50所述的通信装置，其中，终端配置有重传定时器，处理模块，还用于在重传定时器运行时，停止根据第二搜索空间组监测PDCCH，开始根据第一搜索空间组监测PDCCH；其中，重传定时器包括非连续接收的下行链路重传定时器或非连续接收的上行链路重传定时器。
实施例60、根据实施例50-实施例53或实施例55-实施例59任一实施例所述的通信装置，其中，第一搜索空间组具有第一配置参数，第二搜索空间组具有第二配置参数；第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集；和/或，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集。
实施例61、根据实施例60所述的通信装置，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测周期，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测周期。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测周期为第一搜索空间组的监测周期的整数倍。
实施例62、根据实施例50所述的通信装置，其中，第一配置参数中与时域监测相关的参数包括第一搜索空间组的监测符号集合，第二配置参数中与时域监测相关的参数包括第二搜索空间组的监测符号集合。
相应的，第二配置参数中与时域监测相关的参数为第一配置参数中与时域监测相关的参数的子集，包括：第二搜索空间组的监测符号集合为第一搜索空间组的监测符号集合的子集。
实施例63、根据实施例62所述的通信装置，其中，第一配置参数中与频域监测相关的参数包括第一搜索空间组的频域监测位置集合，第二配置参数中与频域监测相关的参数包括第二搜索空间组的频域监测位置集合。
相应的，第二配置参数中与频域监测相关的参数为第一配置参数中与频域监测相关的参数的子集，包括：第二搜索空间组的频域监测位置集合为第一搜索空间组的频域监测位置集合的子集。
实施例64、一种终端，包括存储器、处理器以及存储在所述存储器中并可在所述处 理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现如实施例1-实施例7、实施例22-实施例35任一实施例所述的物理下行控制信道PDCCH监测方法。
实施例65、一种计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述实施例1-实施例7、实施例22-实施例35任一实施例所述的物理下行控制信道PDCCH监测方法。
实施例66、一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机可以执行上述实施例1-实施例7、实施例22-实施例35任一实施例所述的物理下行控制信道PDCCH监测方法。
实施例67、一种芯片，该芯片包括处理器，当该处理器执行指令时，处理器用于执行上述实施例1-实施例7、实施例22-实施例35任一实施例所述的物理下行控制信道PDCCH监测方法。该指令可以来自芯片内部的存储器，也可以来自芯片外部的存储器。可选的，该芯片还包括输入输出电路。
实施例68、一种通信系统，其中，包括网络设备，以及如实施例64所述的终端。
最后应说明的是：以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (26)

  1. 一种物理下行控制信道PDCCH监测方法，其特征在于，所述方法应用于终端，所述方法包括：
    所述终端接收网络设备配置的搜索空间信息，所述搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；
    在所述终端根据所述第二搜索空间组监测PDCCH时，若所述终端接收到用于数据调度的下行控制信息DCI，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH。
  2. 根据权利要求1所述的方法，其特征在于，所述用于数据调度的下行控制信息DCI包括使用如下任意一种无线网络临时标识RNTI加扰的DCI：
    小区无线网络临时标识C-RNTI、调制与编码策略无线网络临时标识MCS-C-RNTI，或配置调度无线网络临时标识CS-RNTI。
  3. 根据权利要求2所述的方法，其特征在于，所述用于数据调度的下行控制信息DCI为用户设备特定搜索空间UESS内的DCI或第三类型公共搜索空间CSS type 3内的DCI。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述第一搜索空间组具有第一配置参数，所述第二搜索空间组具有第二配置参数；
    所述第二配置参数中与时域监测相关的参数为所述第一配置参数中与时域监测相关的参数的子集；和/或，
    所述第二配置参数中与频域监测相关的参数为所述第一配置参数中与频域监测相关的参数的子集。
  5. 根据权利要求4所述的方法，其特征在于，所述第一配置参数中与时域监测相关的参数包括所述第一搜索空间组的监测周期，所述第二配置参数中与时域监测相关的参数包括所述第二搜索空间组的监测周期；
    相应的，所述第二配置参数中与时域监测相关的参数为所述第一配置参数中与时域监测相关的参数的子集，包括：
    所述第二搜索空间组的监测周期为所述第一搜索空间组的监测周期的整数倍。
  6. 根据权利要求4所述的方法，其特征在于，所述第一配置参数中与时域监测相关的参数包括所述第一搜索空间组的监测符号集合，所述第二配置参数中与时域监测相关的参数包括所述第二搜索空间组的监测符号集合；
    相应的，所述第二配置参数中与时域监测相关的参数为所述第一配置参数中与时域监测相关的参数的子集，包括：
    所述第二搜索空间组的监测符号集合为所述第一搜索空间组的监测符号集合的子集。
  7. 根据权利要求4所述的方法，其特征在于，所述第一配置参数中与频域监测相关的参数包括所述第一搜索空间组的频域监测位置集合，所述第二配置参数中与频域监测相关的参数包括所述第二搜索空间组的频域监测位置集合；
    相应的，所述第二配置参数中与频域监测相关的参数为所述第一配置参数中与频域监测相关的参数的子集，包括：
    所述第二搜索空间组的频域监测位置集合为所述第一搜索空间组的频域监测位置集合的子集。
  8. 一种物理下行控制信道PDCCH监测方法，其特征在于，所述方法应用于终端，所述方法包括：
    所述终端接收网络设备配置的搜索空间信息，所述搜索空间信息包括第一搜索空间组和第二搜索空间组的信息；
    在所述终端根据所述第二搜索空间组监测PDCCH时，若所述终端向所述网络设备发送第一信号，在发送所述第一信号后，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，所述第一信号至少包括如下信号或信道中的其中一种：随机接入前导preamble码、调度请求SR、混合自动重传请求否定应答NACK，和/或物理上行共享信道PUSCH。
  9. 根据权利要求8所述的方法，其特征在于，在发送所述第一信号后，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，包括：
    在发送所述preamble码后的下一个时隙，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH。
  10. 根据权利要求8所述的方法，其特征在于，在发送所述第一信号后，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，包括：
    所述终端接收到使用随机接入无线网络临时标识RA-RNTI加扰的DCI；
    若所述preamble码用于非竞争接入，则所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH。
  11. 根据权利要求8所述的方法，其特征在于，在发送所述第一信号后，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，包括：
    所述终端接收到所述网络设备针对所述第一信号返回的随机接入响应RAR；
    若所述preamble码用于非竞争接入，则所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH。
  12. 根据权利要求10或11所述的方法，其特征在于，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，包括：
    所述终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后，或，所述终端在接收到所述网络设备针对所述第一信号返回的随机接入响应RAR之后的预设个数的时间单元后，停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH。
  13. 根据权利要求12所述的方法，其特征在于，所述时间单元包括如下的任意一种：
    正交频分复用OFDM符号、时隙，或者，毫秒。
  14. 根据权利要求12所述的方法，其特征在于，所述终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后，或，所述终端在接收到所述网络设备针对 所述第一信号返回的随机接入响应RAR之后的预设个数的时间单元后，停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，包括：
    所述终端在接收到使用RA-RNTI加扰的DCI之后的预设个数的时间单元后的第一个时隙，或，所述终端在接收到所述网络设备针对所述第一信号返回的随机接入响应RAR之后的预设个数的时间单元后的第一个时隙，停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH。
  15. 根据权利要求8所述的方法，其特征在于，在发送所述第一信号后，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，包括：
    在接收到所述网络设备针对所述第一信号返回的随机接入响应RAR后，所述终端向所述网络设备发送第二信号；
    若所述preamble码用于竞争接入，且所述第二信号包括C-RNTI MAC控制元素，则在发送所述第二信号后，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH。
  16. 根据权利要求15所述的方法，其特征在于，若所述preamble码用于竞争接入，且所述第二信号包括C-RNTI MAC控制元素，则在发送所述第二信号后，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，包括：
    在发送所述第二信号后，当随机接入竞争解决定时器运行时，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH。
  17. 根据权利要求8所述的方法，其特征在于，所述终端配置有重传定时器，在发送所述第一信号后，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH，包括：
    当所述重传定时器运行时，所述终端停止根据所述第二搜索空间组监测PDCCH，开始根据所述第一搜索空间组监测PDCCH；其中，所述重传定时器包括非连续接收的下行链路重传定时器或非连续接收的上行链路重传定时器。
  18. 根据权利要求8-11或13-17任一项所述的方法，其特征在于，所述第一搜索空间组具有第一配置参数，所述第二搜索空间组具有第二配置参数；
    所述第二配置参数中与时域监测相关的参数为所述第一配置参数中与时域监测相关的参数的子集；和/或，
    所述第二配置参数中与频域监测相关的参数为所述第一配置参数中与频域监测相关的参数的子集。
  19. 根据权利要求18所述的方法，其特征在于，所述第一配置参数中与时域监测相关的参数包括所述第一搜索空间组的监测周期，所述第二配置参数中与时域监测相关的参数包括所述第二搜索空间组的监测周期；
    相应的，所述第二配置参数中与时域监测相关的参数为所述第一配置参数中与时域监测相关的参数的子集，包括：
    所述第二搜索空间组的监测周期为所述第一搜索空间组的监测周期的整数倍。
  20. 根据权利要求18所述的方法，其特征在于，所述第一配置参数中与时域监测 相关的参数包括所述第一搜索空间组的监测符号集合，所述第二配置参数中与时域监测相关的参数包括所述第二搜索空间组的监测符号集合；
    相应的，所述第二配置参数中与时域监测相关的参数为所述第一配置参数中与时域监测相关的参数的子集，包括：
    所述第二搜索空间组的监测符号集合为所述第一搜索空间组的监测符号集合的子集。
  21. 根据权利要求20所述的方法，其特征在于，所述第一配置参数中与频域监测相关的参数包括所述第一搜索空间组的频域监测位置集合，所述第二配置参数中与频域监测相关的参数包括所述第二搜索空间组的频域监测位置集合；
    相应的，所述第二配置参数中与频域监测相关的参数为所述第一配置参数中与频域监测相关的参数的子集，包括：
    所述第二搜索空间组的频域监测位置集合为所述第一搜索空间组的频域监测位置集合的子集。
  22. 一种终端，包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序，其特征在于，所述处理器执行所述计算机程序时实现如权利要求1-21任一项所述的物理下行控制信道PDCCH监测方法。
  23. 一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，其特征在于，所述计算机程序被处理器执行时实现如权利要求1-21任一项所述的物理下行控制信道PDCCH监测方法。
  24. 一种计算机程序产品，其特征在于，当所述计算机程序产品在计算机上运行时，使得所述计算机执行如权利要求1-21任一项所述的物理下行控制信道PDCCH监测方法。
  25. 一种芯片，其特征在于，所述芯片包括处理器，所述处理器与存储器耦合，所述处理器执行所述存储器中存储的计算机程序，以实现如权利要求1-21任一项所述的物理下行控制信道PDCCH监测方法。
  26. 一种通信系统，其特征在于，包括网络设备，以及如权利要求22所述的终端。
PCT/CN2021/105573 2020-07-17 2021-07-09 物理下行控制信道pdcch监测方法、装置及终端 Ceased WO2022012440A1 (zh)

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EP4529293A3 (en) 2025-04-02
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