WO2023000334A1 - Pdcch监听方法、装置、设备及存储介质 - Google Patents

Pdcch监听方法、装置、设备及存储介质 Download PDF

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Publication number
WO2023000334A1
WO2023000334A1 PCT/CN2021/108259 CN2021108259W WO2023000334A1 WO 2023000334 A1 WO2023000334 A1 WO 2023000334A1 CN 2021108259 W CN2021108259 W CN 2021108259W WO 2023000334 A1 WO2023000334 A1 WO 2023000334A1
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WO
WIPO (PCT)
Prior art keywords
cell
bwp
terminal device
pdcch
information
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PCT/CN2021/108259
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English (en)
French (fr)
Inventor
李海涛
尤心
石聪
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to EP21950583.1A priority Critical patent/EP4344114A4/en
Priority to PCT/CN2021/108259 priority patent/WO2023000334A1/zh
Priority to CN202180098050.6A priority patent/CN117296280A/zh
Publication of WO2023000334A1 publication Critical patent/WO2023000334A1/zh
Priority to US18/396,465 priority patent/US20240137827A1/en

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    • 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 signaling, 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • the embodiment of the present application relates to the field of communication technologies, and in particular to a PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) monitoring method, device, device, and storage medium.
  • PDCCH Physical Downlink Control Channel
  • Physical Downlink Control Channel Physical Downlink Control Channel
  • the terminal device monitors the PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) of the target cell, waits for the target cell to schedule uplink transmission, and uses the scheduled uplink resources to send a handover completion message.
  • PDCCH Physical Downlink Control Channel
  • Physical Downlink Control Channel Physical Downlink Control Channel
  • the monitoring method for the PDCCH needs further research.
  • Embodiments of the present application provide a PDCCH monitoring method, device, device, and storage medium. Described technical scheme is as follows:
  • a PDCCH monitoring method is provided, the method is performed by a terminal device, and the method includes:
  • the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device;
  • a PDCCH monitoring method is provided, the method is performed by a first network device, and the method includes:
  • the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device;
  • the terminal device monitors the PDCCH sent by the second network device based on the CORESET associated with the target BWP of the second cell.
  • a PDCCH monitoring method is provided, the method is performed by a second network device, and the method includes:
  • the PDCCH is sent at the target BWP, wherein the terminal device monitors the PDCCH based on the CORESET associated with the target BWP.
  • a PDCCH monitoring device includes:
  • a receiving module configured to receive a switching command sent by the first network device, the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device ;
  • a monitoring module configured to monitor the PDCCH sent by the second network device based on the CORESET associated with the target BWP of the second cell.
  • a PDCCH monitoring device includes:
  • a sending module configured to send a switching command to the terminal device, where the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device;
  • the terminal device monitors the PDCCH sent by the second network device based on the CORESET associated with the target BWP of the second cell.
  • a PDCCH monitoring device includes:
  • a sending module configured to send a switching command to the first network device, where the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device;
  • the sending module is further configured to send a PDCCH at the target BWP, wherein the terminal device monitors the PDCCH based on the CORESET associated with the target BWP.
  • a PDCCH monitoring device includes:
  • a sending module configured to send a switching command to the first network device, where the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device;
  • the sending module is further configured to send a PDCCH in a target bandwidth part BWP, wherein the terminal device monitors the PDCCH based on a control resource set CORESET associated with the target BWP.
  • a terminal device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program to realize the above-mentioned terminal device side The PDCCH monitoring method.
  • a network device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program to implement the above-mentioned first network A PDCCH monitoring method on the device side, or implement the above-mentioned PDCCH monitoring method on the second network device side.
  • a computer-readable storage medium where a computer program is stored in the storage medium, and the computer program is used to be executed by a processor, so as to implement the above PDCCH monitoring method.
  • a chip includes a programmable logic circuit and/or program instructions, and is used to implement the above PDCCH monitoring method when the chip is running.
  • a computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads from the The computer-readable storage medium reads and executes the computer instructions, so as to realize the above PDCCH monitoring method.
  • the terminal device After receiving the handover command, the terminal device monitors the PDCCH sent by the target cell based on the CORESET associated with the target BWP of the target cell, so that the terminal device can accurately monitor the PDCCH, thereby obtaining available uplink resources from the PDCCH to send the handover completion messages to improve the handover success rate.
  • FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • Fig. 2 exemplarily shows a schematic diagram of a switching relationship between RRC states in an NR system
  • Fig. 3 exemplarily shows a schematic diagram of a cell handover process in an NR system
  • Fig. 4 exemplarily shows a schematic diagram of an adaptive change process of bandwidth in an NR system
  • Fig. 5 exemplarily shows a schematic diagram of a MAC CE format for indicating a corresponding TCI state of a PDCCH
  • FIG. 6 is a flowchart of a PDCCH monitoring method according to an embodiment of the present application.
  • FIG. 7 is a flowchart of a PDCCH monitoring method according to another embodiment of the present application.
  • FIG. 8 is a flowchart of a PDCCH monitoring method according to another embodiment of the present application.
  • FIG. 9 is a flowchart of a PDCCH monitoring method according to another embodiment of the present application.
  • FIG. 10 is a flowchart of a PDCCH monitoring method according to another embodiment of the present application.
  • FIG. 11 is a block diagram of a PDCCH monitoring device provided by an embodiment of the present application.
  • FIG. 12 is a block diagram of a PDCCH monitoring device provided in another embodiment of the present application.
  • FIG. 13 is a block diagram of a PDCCH monitoring device provided in another embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • Fig. 15 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.
  • the evolution of the technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.
  • FIG. 1 shows a schematic diagram of a network architecture provided by an embodiment of the present application.
  • the network architecture may include: a terminal device 10 , an access network device 20 and a core network device 30 .
  • the terminal device 10 may refer to a UE (User Equipment, user equipment), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent or a user device.
  • UE User Equipment
  • an access terminal a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent or a user device.
  • the terminal device 10 can also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol, session initiation protocol) phone, a WLL (Wireless Local Loop, wireless local loop) station, a PDA (Personal Digital Assistant, personal digital processing) , handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5GS (5th Generation System, fifth-generation mobile communication system) or future evolution of PLMN (Public Land Mobile Network, public land mobile communication network) terminal equipment, etc., this embodiment of the present application is not limited to this.
  • the devices mentioned above are collectively referred to as terminal devices.
  • the number of terminal devices 10 is generally multiple, and one or more terminal devices 10 may be distributed in a cell managed by each access network device 20 .
  • the access network device 20 is a device deployed in an access network to provide a wireless communication function for the terminal device 10 .
  • the access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and so on.
  • the names of devices with access network device functions may be different.
  • they are called gNodeB or gNB.
  • the name "access network equipment” may change.
  • access network devices For the convenience of description, in the embodiment of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 10 are collectively referred to as access network devices.
  • a communication relationship may be established between the terminal device 10 and the core network device 30 through the access network device 20 .
  • the access network device 20 may be one or more eNodeBs in EUTRAN (Evolved Universal Terrestrial Radio Access Network, Evolved Universal Terrestrial Radio Network) or EUTRAN;
  • EUTRAN Evolved Universal Terrestrial Radio Access Network
  • EUTRAN Evolved Universal Terrestrial Radio Network
  • the access network device 20 may be a RAN (Radio Access Network, radio access network) or one or more gNBs in the RAN.
  • the network device refers to the access network device 20 unless otherwise specified.
  • the functions of the core network device 30 are mainly to provide user connections, manage users, and carry out services, and provide an interface to external networks as a bearer network.
  • the core network equipment in the 5G NR system can include AMF (Access and Mobility Management Function, access and mobility management function) entity, UPF (User Plane Function, user plane function) entity and SMF (Session Management Function, session management function) entity and other equipment.
  • AMF Access and Mobility Management Function, access and mobility management function
  • UPF User Plane Function, user plane function
  • SMF Session Management Function, session management function
  • the access network device 20 and the core network device 30 communicate with each other through a certain air interface technology, such as an NG interface in a 5G NR (New Radio, new air interface) system.
  • the access network device 20 and the terminal 10 communicate with each other through a certain air interface technology, such as a Uu interface.
  • the "5G NR system" in the embodiment of the present application may also be called a 5G system or an NR system, but those skilled in the art can understand its meaning.
  • the technical solutions described in the embodiments of this application can be applied to the 5G NR system, and can also be applied to the subsequent evolution system of the 5G NR system.
  • the UE and the terminal device express the same meaning, and the two can replace each other; the network device and the access network device express the same meaning, and the two can replace each other.
  • the communication system usually supports the switching process of the terminal equipment in the connected state.
  • a user who is using network services moves from one cell to another, or due to reasons such as wireless transmission business load adjustment, activation operation maintenance, equipment failure, etc., in order to ensure the continuity of communication and the quality of service, the system will The communication link with the original cell is transferred to the new cell, that is, the handover process is performed.
  • a terminal device can be handed over from the cell of the first network device to the cell of the second network device.
  • the first network device may be called a source network device, a source access network device or a source base station
  • the second network device may be called a target network device, a target access network device or a target base station.
  • the functions of the RRC protocol include: broadcasting system information, RRC connection control, inter-RAT (Radio Access Type, wireless access type) transfer, measurement configuration and reporting, general protocol error handling, self-configuration and self-optimization, etc.
  • RRC connection control The functions of the RRC protocol include: broadcasting system information, RRC connection control, inter-RAT (Radio Access Type, wireless access type) transfer, measurement configuration and reporting, general protocol error handling, self-configuration and self-optimization, etc.
  • inter-RAT Radio Access Type, wireless access type
  • the RRC state includes RRC_CONNECTED (connected) state, RRC_IDLE (idle) state and RRC_INACTIVE (inactive) state, where:
  • the RRC_IDLE state is used to control wireless resources and wireless channels when the terminal device configures a connection establishment request with its own high layer.
  • the operations supported by the RRC IDLE state include: cell reselection, paging of mobile termination data initiated by 5GC (5G Core Network, 5G core network), paging and broadcasting system messages of mobile termination data areas managed by 5GC, PLMN ( Public Land Mobile Network, public land mobile (communication) network), etc.
  • the paging is initiated by the CN (Core Network, core network), and the paging area is configured by the CN.
  • a terminal device in the RRC_IDLE state is characterized in that the terminal device does not retain the RRC context (RRC Context), and the terminal device does not establish an RRC connection with the network device.
  • the RRC context includes parameters in the interface message of the terminal device, etc., and the specific content of the RRC context is determined by the behavior of the terminal device and the network device.
  • a terminal device in the RRC_IDLE state has no data to be transmitted, and will enter a sleep state by itself, and turn off the transceiver unit to reduce power consumption.
  • a terminal device in RRC_IDLE state only wakes up periodically to receive possible paging messages, ie discontinuous reception.
  • the RRC_CONNECTED state is used for the terminal device to establish an RRC connection with the network device and perform data transmission.
  • the operations supported by the RRC_CONNECTED state include storing the AS context of the terminal device in the terminal device and the network device, and starting unicast data transmission from the terminal device.
  • the terminal device in the RRC_CONNECTED state has established an RRC context, and all the parameters necessary for establishing communication between the terminal device and the network device have been known to both communication parties, and the network device has assigned a C-RNTI (Cell- Radio Network Temporary Identifier, cell wireless network temporary identifier), the terminal device and the network device are in the CM_CONNECTED (Connection Management, connection management) state together.
  • C-RNTI Cell- Radio Network Temporary Identifier, cell wireless network temporary identifier
  • the terminal device is in a continuous receiving state. Until the data transmission is completed, when the terminal device enters the waiting state, it switches to the DRX (Discontinuous Reception, discontinuous reception) connection state to save power consumption. When there is data to be transmitted in the terminal device, switch back to the continuous receiving state.
  • DRX discontinuous Reception, discontinuous reception
  • RRC_INACTIVE is a new RRC state defined for the purpose of reducing air interface signaling overhead, quickly restoring wireless connections, and quickly restoring data services in the 5G NR network environment.
  • the RRC context is reserved between the terminal device and a network device.
  • a network device refers to any one of all network devices that establish a connection with the terminal device, and the terminal device and the core network are in the CM_CONNECTED state. At this time, the process of switching the terminal device and the network device to the connection state for data reception is relatively fast, and at the same time, no additional signaling overhead will be generated, and the terminal device in the RRC_INACTIVE state will enter the sleep state to reduce power consumption.
  • FIG. 2 shows a schematic diagram of switching relationships between RRC states in an NR system.
  • the RRC_IDLE state is switched to the RRC_CONNECTED state by establishing a new connection
  • the RRC_CONNECTED state is switched to the RRC_IDLE state by releasing the resources of the terminal device.
  • the RRC_INACTIVE state is switched to the RRC_CONNECTED state by establishing a connection
  • the RRC_CONNECTED state is switched to the RRC_INACTIVE state by deactivation.
  • the RRC_INACTIVE state can be switched to RRC_IDLE State, the specific process is in FFS (For Further Study, for further study) state.
  • the difference between the RRC_IDLE state, the RRC_CONNECTED state and the RRC_INACTIVE state lies in the aspect of mobility management.
  • the mobility in the RRC_IDLE state or the RRC_INACTIVE state is realized based on the cell reselection of the terminal equipment, and the mobility in the RRC_CONNECTED state is realized by the network side based on measurement.
  • FIG. 3 shows a schematic diagram of a terminal handover process in an NR system.
  • the terminal device When the terminal device is in a moving state, the signal quality of the serving cell may deteriorate.
  • the terminal device connects to a cell with better signal quality through the handover process to ensure that the terminal device has continuous and uninterrupted communication services.
  • the whole switching process is divided into the following three stages.
  • the AMF provides mobility control information to the base station, and measurement control and reporting are performed between the terminal equipment and the source base station.
  • the source base station After the source base station makes a handover decision according to the measurement report of the terminal equipment, it sends a handover request (Handover Request) to the target base station.
  • the target base station performs admission control, and when it is determined that the handover of the terminal equipment is allowed, the target base station sends a handover request response (Handover Request Acknowledge) to the source base station.
  • the RAN Radio Access Network, radio access network
  • the source base station sends an SN (Serial Number, serial number) status transfer (SN Status Transfer) to the target base station.
  • the source base station obtains the buffered data and new data from the UPF, and then the RAN sends the user data to the target base station.
  • the target base station caches user data from the source base station. So far, the RAN handover is completed.
  • the target base station sends a path switch request (Path Switch Request) to the AMF, AMF and UPF perform path switching, and then the UPF sends an end indication message (End Marker) to the source base station, and the source base station forwards the end indication information to the target base station .
  • the AMF sends a Path Switch Request Acknowledge to the target base station, and the target base station instructs the source base station to release the context information of the terminal device.
  • the source base station can initiate handover preparation/request messages for multiple target cells at the same time or successively according to the measurement report on the terminal equipment side (including the measurement results of multiple cells). Based on the directly connected X2/Xn interface, or through the S1/N2 interface with the MME (Mobility Management Entity, mobility management entity)/AMF).
  • MME Mobility Management Entity, mobility management entity
  • Each target cell performs access control according to its own RRM (Radio Resource Management, radio resource management) algorithm after receiving the handover preparation/request message, and sends a handover request response to the base station where the source cell is located under the premise of passing the access control
  • the message (response handover request failure message if the access control fails), which carries the handover command generated by the target cell.
  • the source base station selects one of the multiple target cells that return the handover response according to its own RRM algorithm as the final handover target cell, and passes the handover command corresponding to the target cell through an RRC (Radio Resource Control, radio resource control) reconfiguration message Send it to the terminal device, and then realize the complete control of the network over the switching process.
  • RRC Radio Resource Control, radio resource control
  • the handover process of terminal equipment can be divided into two types: soft handover and hard handover.
  • hard handover is a handover in which the terminal equipment first disconnects from the source cell and then establishes a connection with the target cell under the condition that the carrier frequency of the source cell and the target cell are different.
  • Soft handover is a handover process in which the terminal device first establishes a stable connection with the target cell and then disconnects from the source cell under the condition that the carrier frequency of the source cell and the target cell are the same. Soft handover can reduce the occurrence of dropped calls and improve user service quality.
  • the following describes the BWP in the NR system.
  • the minimum bandwidth is 5MHz and the maximum bandwidth is 400MHz.
  • the maximum bandwidth is also called wideband carrier (Wideband Carrier).
  • Terminal equipment working on a wideband carrier will generate greater power consumption, and terminal equipment working on a broadband carrier needs to have higher performance, which will increase The cost of terminal equipment.
  • the concept of BWP is introduced into the NR system.
  • the BWP is a set of continuous common resource blocks (CRB) for subcarrier spacing in a part of the bandwidth of a carrier.
  • Each BWP has its own different bandwidth and frequency point, and its SCS (Sub-Carrier Space, sub-carrier spacing) and SSB (Synchronization Signal and PBCH Block, synchronization signal block) period can also be configured differently.
  • the network device can allocate different BWPs to the terminal device according to the needs of the terminal device at different times.
  • BWP is also called bandwidth adaptive change.
  • FIG. 4 exemplarily shows the adaptive change process of the bandwidth in the NR system.
  • the NR system configures BWP 1 with a large bandwidth for the terminal equipment; at the second moment, the traffic volume of the terminal equipment is small, and the system configures a small BWP for the terminal equipment 2.
  • BWP 2 can meet the communication needs of terminal equipment at this time.
  • the system detects that there is selective fading of a wide range of frequencies within the bandwidth of BWP 1, or that resources in the frequency range of BWP 1 are relatively scarce , the system configures a new bandwidth BWP 3 for the terminal device.
  • the BWP of the terminal device is divided into UL BWP (Uplink BWP, uplink BWP) and DL BWP (Downlink BWP, downlink BWP) according to the transmission direction.
  • the network configures up to 4 UL BWPs and 4 DL BWPs for terminal devices in the RRC_CONNECTED state.
  • a terminal device in the RRC_CONNECTED state has at most one active UL BWP and one active DL BWP at a time.
  • a frequency-division duplex system also known as a full-duplex system
  • two independent channels are required for communication between terminal equipment and network equipment, one channel is used to transmit messages downward, and the other channel is used to transmit messages upward.
  • the two channels do not affect each other, so there is no explicit association between UL BWP and DL BWP.
  • UL BWP and DL BWP if one party changes, the other party will not be affected.
  • the network configures four UL BWPs with indexes 0, 1, 2, and 3 for the terminal device; and four DL BWPs with indexes 0, 1, 2, and 3 respectively.
  • the index of the activated UL BWP is 0, the index of the activated DL BWP is 1, and the DL BWP is switched through the DCI (Downlink Control Information) command. After switching, the index of the DL BWP becomes 2, and the UL The index of BWP is 0 and remains unchanged.
  • PDCCH Physical Downlink Control Channel
  • Physical Downlink Control Channel Physical Downlink Control Channel
  • PDCCH mainly carries DCI information of PUSCH (Physical Uplink Control Channel, physical uplink control channel) and PUSCH (Physical Uplink Share Channel, physical uplink shared channel).
  • the PDCCH can be divided into common control information (common search space) and dedicated control information (dedicated search space).
  • the public control information and the dedicated control information define the starting position of the blind detection of the terminal equipment and the search mode of the channel.
  • the terminal equipment monitors the PDCCH at a predetermined position on the search space, and performs blind detection. Different terminal devices distinguish their respective PDCCHs through RNTI (Radio Network Temporary Identity, wireless network temporary identity) information.
  • RNTI Radio Network Temporary Identity, wireless network temporary identity
  • the terminal device monitors the PDCCH on the PDCCH search space configured by the network.
  • Each DL BWP of the UE is configured with a maximum of 10 PDCCH search spaces, and each PDCCH search space is associated with a CORESET.
  • the network can configure up to 3 CORESETs for each DL BWP of the terminal device, and configure a set of TCI states for each CORESET. At a certain moment, only one active TCI state can exist in a group of TCI states.
  • the terminal device receives the PDCCH using the activated TCI state of the CORESET corresponding to the search space.
  • FIG. 5 shows the format of a terminal-specific MAC CE (MAC Control Element, media access layer control unit) for indicating the TCI state corresponding to the PDCCH.
  • MAC Control Element media access layer control unit
  • the NR system introduces a beam management mechanism to support multi-beam operation.
  • Beam management mechanisms include beam scanning, beam measurement, beam determination, and beam reporting.
  • Beam scanning refers to that within a specific period or time period, beams are sent and/or received in a preset manner to cover a specific spatial area.
  • Beam measurement refers to a process in which a terminal device or network device measures the quality and characteristics of a received shaped signal. During beam management, a terminal device or network device identifies the best beam through correlation measurements.
  • Beam determination it means that the terminal device or network device selects the beam resource with the best signal quality.
  • 5G adopts beam management mechanism, which can be used for initial access, control channel and data channel.
  • the target cell can configure RACH-skip information in the handover command, that is, the handover process can be RACH-less HO.
  • the RACH-skip information may include the uplink resource for the terminal device to access the target cell, for the terminal device to send a handover completion message. If no uplink resource is configured in the handover command, the terminal device needs to monitor the PDCCH of the target cell, wait for the target cell to schedule uplink transmission, and use the scheduled uplink resource to transmit a handover completion message.
  • the terminal device since there is no beamforming, the terminal device performs the RACH-less handover process, and the behavior of monitoring the PDCCH of the target cell is relatively simple.
  • the reception of PDCCH needs to refer to a specific SSB or CSI-RS (Channel State Information-Reference Signal, Channel State Information-Reference Signal), that is, the terminal device uses the activated TCI (Transmission Configuration Indicator, transmission configuration indication) state to receive PDCCH.
  • TCI Transmission Configuration Indicator, transmission configuration indication
  • the terminal device cannot determine which TCI state to use to receive the PDCCH based on the handover command, which may make the terminal device unable to obtain available uplink resources after the handover, and unable to send a handover completion message, resulting in handover failure.
  • FIG. 6 shows a flowchart of a PDCCH monitoring method provided by an embodiment of the present application. This method can be applied to the network architecture shown in Figure 1.
  • the method may include the following steps (610-620):
  • Step 610 the first network device sends a switching command to the terminal device, the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device.
  • the terminal device receives the switching command sent by the first network device.
  • the terminal device may be any terminal device.
  • the terminal device may be any device capable of monitoring the PDCCH in the NR system.
  • the technical solution of the present application is not limited to the application in the NR system, and can also be applied in the LTE system or other subsequent evolved communication systems.
  • the first network device is a network device that establishes a connection with the terminal device.
  • the first network device is also called a source network device or a source base station.
  • the first cell is centered on the first network device, and a signal coverage area is a physical area divided based on carrier frequency, scrambling code and other information, and the terminal device establishes a connection with the first network device in the first cell.
  • the first network device may have at least one cell, and the first cell may be one of the above at least one cell, and the first cell is also called a source cell or a serving cell.
  • the second network device is a network device to which a connection will be established after the terminal device performs a handover process, and is also called a target network device or a target base station.
  • the second cell is a physical area that is centered on the second network device and covered by a signal based on information such as carrier frequency and scrambling code.
  • the second network device may have at least one cell, and the second cell may be one of the above at least one cell, and the second cell is also called a target cell.
  • the first network device and the second network device are two different network devices, or the first network device and the second network device may also be the same network device.
  • the first network device and the second network device are the same network device.
  • the reasons why the terminal device switches from the first cell of the first network device to the second cell of the second network device include but are not limited to: the service signal quality of the first cell is too low, the first Failure of network equipment, etc., is not limited in this application.
  • the handover command is a RACH-less handover command
  • the RACH-less handover command is used to instruct the terminal device to perform a RACH-less handover process.
  • the first network device sends an RRC message to the terminal device, and the terminal device receives the RRC message sent by the first network device, where the RRC message includes information used to instruct the terminal device to perform a RACH-less handover process.
  • the above RRC message is an RRC reconfiguration message, which includes ReconfigurationWithSync, representing a handover command.
  • the switching command may be generated by the second network device and forwarded by the first network device.
  • the information used to instruct the terminal device to perform the RACH-less handover process may be an RACH-less handover identifier or RACH-skip information.
  • the terminal device can learn to execute the RACH-less handover process.
  • step 620 the terminal device monitors the PDCCH sent by the second network device based on the CORESET associated with the target BWP of the second cell.
  • the terminal device After receiving the handover command, the terminal device determines the CORESET associated with the target BWP of the second cell according to the handover command.
  • the target BWP of the second cell may be an initial BWP or an activated BWP or a BWP in other states.
  • the terminal device uses the TCI state corresponding to the CORESET associated with the target BWP to monitor the PDCCH sent by the second network device.
  • the first network device sends a switching command generated by the second network device
  • the terminal device receives the switching command sent by the first network device
  • the terminal device determines the target BWP and its associated CORESET and/or or other information, and determine a target receiving beam through the information
  • the terminal device uses the determined target receiving beam to monitor the PDCCH sent by the second network device.
  • the terminal device listens to the PDCCH scrambled with its own C-RNTI, obtains uplink grant (UL grant) information from it, determines the corresponding uplink resource based on the uplink grant information, and uses the determined uplink resource sending a handover completion message to the second network device.
  • the handover complete message may be an RRC reconfiguration complete message.
  • the terminal device after receiving the handover command, the terminal device monitors the PDCCH sent by the target cell based on the CORESET associated with the target BWP of the target cell, so that the terminal device can accurately monitor the PDCCH , so as to obtain available uplink resources from the PDCCH to send a handover completion message, thereby improving the handover success rate.
  • FIG. 7 shows a flowchart of a PDCCH monitoring method provided by another embodiment of the present application. This method can be applied to the network architecture shown in FIG. 1 .
  • the method may include the following steps (710-720):
  • Step 710 the first network device sends a switching command to the terminal device, the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device.
  • the terminal device receives the switching command sent by the first network device.
  • the handover command is sent in the form of an RRC message
  • the first network device sends an RRC message (such as an RRC reconfiguration message) to the terminal device, and the RRC message includes the handover command (such as ReconfigurationWithSync).
  • RRC message such as an RRC reconfiguration message
  • the handover command such as ReconfigurationWithSync
  • the handover command also includes information for instructing the terminal device to execute the RACH-less handover process, such as RACH-less handover identifier or RACH-skip information.
  • the handover command also includes configuration information of activated BWP (active BWP) of the second cell, wherein the configuration information of activated BWP is used to indicate activated BWP, at least one CORESET associated with activated BWP, and at least one CORESET Each CORESET corresponds to a set of configured TCI status and other information.
  • activated BWP active BWP
  • the handover command also includes configuration information of an initial BWP (initial BWP) of the second cell, where the configuration information of the initial BWP is used to indicate information such as the initial BWP and the CORESET associated with the initial BWP.
  • initial BWP initial BWP
  • Step 720 based on the CORESET associated with the initial BWP of the second cell, the terminal device monitors the PDCCH sent by the second network device.
  • the target BWP is the initial BWP of the second cell.
  • the CORESET associated with the initial BWP is denoted as CORESET#0.
  • the terminal device determines the initial BWP of the second cell according to the handover command.
  • the terminal device determines the initial BWP of the second cell according to the configuration information of the initial BWP of the second cell.
  • the terminal device determines the initial BWP of the first cell as the initial BWP of the second cell.
  • configuration information such as CORESET associated with the initial BWP of the second cell follows the incremental (Delta) configuration principle, that is, for the updated configuration information of the second cell, the second cell uses signaling to configure;
  • the updated configuration information (the same configuration information of the first cell and the second cell) is configured without signaling.
  • the first network device sends a handover request to the second network device, and the second network device receives the handover request, and determines the configuration information of the first cell of the first network device based on the handover request (such as the CORESET associated with the initial BWP of the first cell, etc.
  • the second network device compares the configuration information of the second cell with the configuration information of the first cell determined above, if there is different configuration information, then configure the different configuration information through signaling, if there is no difference configuration information, it is not necessary to use signaling for configuration.
  • the terminal device determines configuration information such as CORESET associated with the BWP of the second cell based on the handover command, and uses relevant configuration information of the first cell if the terminal device has not received part of the configuration information of the second cell. If the terminal device receives the updated configuration information of the second cell, it updates the corresponding configuration information according to the signaling.
  • the incremental configuration principle can reduce signaling consumption and ensure that the terminal device can determine information such as the CORESET associated with the initial BWP.
  • the terminal device uses the beam scanning method.
  • the PDCCH sent by the second network device is received on all receiving beams of the device.
  • the above receiving beam is also referred to as an SSB beam, and refers to a beam used for receiving SSB.
  • the terminal device determines at least one target receiving beam from all receiving beams of the terminal device according to the beam measurement result, Use the target receiving beam to receive the PDCCH sent by the second network device.
  • the terminal device obtains beam measurement results through beam scanning and measurement processes, selects one or more target receiving beams through the beam measurement results, and uses the selected target receiving beams to monitor the PDCCH sent by the second network device.
  • the terminal device may determine a target receiving beam for monitoring the PDCCH sent by the second network device from the beam measurement results through some selection criteria.
  • the standard for the terminal device to select target receiving beams based on beam measurement results is to select the first n beams with the best signal quality as target receiving beams, where n is a positive integer.
  • the criterion for the terminal device to select the target receiving beam based on the beam measurement result is to set a signal quality threshold X, and the terminal device determines all beams whose signal quality exceeds X in the beam measurement result as the target receiving beam.
  • the specific process of beam scanning and beam measurement please refer to the above introduction, and will not repeat them here.
  • the first network device forwards the handover command generated by the second network device
  • the terminal device receives the handover command and determines the CORESET associated with the initial BWP of the second cell based on the handover command, and the terminal device selects a signal quality
  • the best receiving beam is used as a target receiving beam, and the terminal device uses the target receiving beam to monitor the PDCCH sent by the second network device.
  • the first network device forwards the handover command generated by the second network device
  • the terminal device receives the handover command and determines the CORESET associated with the initial BWP of the second cell based on the handover command, and the terminal device selects several CORESETs based on the beam measurement results. Beams whose signal quality is higher than a certain threshold are used as target receiving beams, and the terminal device uses these target receiving beams to monitor the PDCCH sent by the second network device.
  • the terminal device monitors the PDCCH based on the CORESET associated with the initial BWP of the target cell, which can reduce the modification of the RRC message.
  • the terminal device determines the target receiving beam according to the beam measurement result and uses the determined target receiving beam to monitor the PDCCH sent by the second network device. Compared with the terminal device using all the receiving beams to monitor the PDCCH, it helps to reduce the monitoring process of the terminal device. Energy consumption, to achieve the purpose of terminal power saving.
  • the terminal device monitors the PDCCH sent by the second network device based on the CORESET associated with the initial BWP of the second cell.
  • the terminal device monitors the CORESET associated with the activated BWP of the second cell, Monitor the PDCCH sent by the second network device.
  • this will be described in conjunction with the two embodiments of FIG. 8 and FIG. 9 .
  • FIG. 8 shows a flowchart of a PDCCH monitoring method provided by another embodiment of the present application.
  • the method can be applied to the network architecture shown in Figure 1, and the method can include the following steps (810-820):
  • Step 810 the first network device sends a switching command to the terminal device, the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device.
  • the terminal device receives the switching command sent by the first network device.
  • the handover command is sent in the form of an RRC message
  • the first network device sends an RRC message (such as an RRC reconfiguration message) to the terminal device, and the RRC message includes the handover command (such as ReconfigurationWithSync).
  • RRC message such as an RRC reconfiguration message
  • the handover command such as ReconfigurationWithSync
  • the handover command also includes information for instructing the terminal device to execute the RACH-less handover process, such as RACH-less handover identifier or RACH-skip information.
  • the handover command also includes configuration information of activated BWP (active BWP) of the second cell, wherein the configuration information of activated BWP is used to indicate activated BWP, at least one CORESET associated with activated BWP, and at least one CORESET Each CORESET corresponds to a set of configured TCI status and other information.
  • activated BWP active BWP
  • the handover command also includes configuration information of an initial BWP (initial BWP) of the second cell, where the configuration information of the initial BWP is used to indicate information such as the initial BWP and the CORESET associated with the initial BWP.
  • initial BWP initial BWP
  • Step 820 the terminal device monitors the PDCCH sent by the second network device by using the TCI state set configured corresponding to at least one CORESET associated with the activated BWP of the second cell.
  • the target BWP is the activated BWP of the second cell.
  • the terminal device determines the activated BWP of the second cell based on the handover command. For example, based on the configuration information of the activated BWP of the second cell included in the handover command, the terminal device determines the activated BWP, at least one CORESET associated with the activated BWP, and a set of TCI states corresponding to each CORESET in the at least one CORESET and other information.
  • the behavior of the terminal device monitoring the PDCCH by using the above configured TCI state set is stipulated by the protocol. For example, if the handover command includes the configuration information of the activated BWP of the second cell, the terminal device uses the configured TCI state set to monitor the PDCCH. Conversely, if the handover command does not include the configuration information of the activated BWP of the second cell, the terminal device cannot use the configured TCI state set to monitor the PDCCH.
  • the behavior of the terminal device monitoring the PDCCH by using the above configured TCI state set is configured by the network.
  • the handover command further includes first information, and the first information is used to instruct the terminal device to use or not use the configured TCI state set to monitor the PDCCH. If the first information in the handover command indicates that the terminal device uses the configured TCI state set to monitor the PDCCH, then the terminal device uses the configured TCI state set to monitor the PDCCH. If the first information in the handover command indicates that the terminal device does not use the configured TCI state set to monitor the PDCCH, the terminal device does not use the configured TCI state set to monitor the PDCCH.
  • the first information above can be represented by 1 bit, for example, 1 means use, 0 means not use, or 1 means not use, 0 means use.
  • the number of CORESETs associated with the activated BWP of the second cell may be one or more.
  • the terminal device uses the TCI state set corresponding to the configuration of this one CORESET to monitor the PDCCH sent by the second network device.
  • the terminal device can monitor the second network device using the TCI state set corresponding to all n CORESET configurations
  • the transmitted PDCCH may also monitor the PDCCH transmitted by the second network device by using the TCI state set correspondingly configured by some of the n CORESETs.
  • the method of determining part of the CORESETs from the n CORESETs may depend on the implementation of the terminal device, or may be instructed by the network device , for example, the indication information corresponding to the part of the CORESET is included in the handover command.
  • the terminal device may carry the beam measurement results of the second cell in the measurement report sent to the first cell, and the first cell may use these beam measurement results when requesting a handover The results are forwarded to the second cell, so that the second cell can be assisted in configuring an appropriate TCI state set, for example, several beams with better beam measurement results are selected as the configured TCI states.
  • the terminal device uses the TCI state set corresponding to at least one CORESET associated with the activated BWP of the target cell to monitor the PDCCH sent by the target cell, which can prevent the terminal device from being on all receiving beams. Monitor the PDCCH to achieve the purpose of power saving for terminal equipment.
  • the solution of this embodiment is equivalent to that the TCI state configuration configured in the handover command is activated, so if the network device subsequently wants to use other TCI states, it needs to be added through the RRC reconfiguration message.
  • FIG. 9 shows a flowchart of a PDCCH monitoring method provided by another embodiment of the present application.
  • the method can be applied to the network architecture shown in Figure 1, and the method can include the following steps (910-920):
  • Step 910 the first network device sends a switching command to the terminal device, the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device.
  • the terminal device receives the switching command sent by the first network device.
  • the handover command is sent in the form of an RRC message
  • the first network device sends an RRC message (such as an RRC reconfiguration message) to the terminal device
  • the RRC message includes a handover command (such as ReconfigurationWithSync).
  • the handover command also includes information for instructing the terminal device to execute the RACH-less handover process, such as RACH-less handover identifier or RACH-skip information.
  • the handover command also includes configuration information of activated BWP (active BWP) of the second cell, wherein the configuration information of activated BWP is used to indicate activated BWP, at least one CORESET associated with activated BWP, and at least one CORESET Each CORESET corresponds to a set of configured TCI status and other information.
  • activated BWP active BWP
  • the handover command also includes configuration information of an initial BWP (initial BWP) of the second cell, where the configuration information of the initial BWP is used to indicate information such as the initial BWP and the CORESET associated with the initial BWP.
  • initial BWP initial BWP
  • the terminal device monitors the PDCCH sent by the second network device by using at least one activated TCI state corresponding to at least one CORESET associated with the activated BWP of the second cell.
  • the switching command further includes second information, where the second information is used to indicate the state of at least one activated TCI.
  • the second information includes a bit sequence, and each bit in the bit sequence is used to indicate whether a corresponding TCI state is active or inactive.
  • the bit sequence A 1 includes 4 bits, wherein the value of the bit number 0 indicates that the corresponding TCI state is not activated, and the value of the bit number 1 indicates that the corresponding TCI state is activated. If the content of the A 1 sequence is (0 , 0, 0, 1), then the TCI state whose index is 3 in the bit sequence A 1 is the active state.
  • the bit sequence A 2 includes 5 bits, wherein a bit value of 0 indicates that the corresponding TCI state is activated, and a bit value of 1 indicates that the corresponding TCI state is activated. If the content of the A 2 sequence is ( 1, 0, 1, 1, 1), then the TCI state whose index is 1 in the bit sequence A 2 is the active state. In the above example, the index starts from 0 and is numbered in descending order.
  • each CORESET has independently corresponding second information, or at least two CORESETs share the same second information.
  • the activated BWP of the second cell is associated with two CORESETs (denoted as CORESET#1 and CORESET#2), these two CORESETs share the same second information, and the second information is a bit sequence as For example, assuming that the second information is (1, 0, 0, 0), where 1 indicates activation and 0 indicates inactivation, it indicates activation of the first TCI state in the TCI state set corresponding to CORESET#1, and activation of CORESET# 2 corresponds to the first TCI state in the TCI state set, and the terminal device uses these two activated TCI states to monitor the PDCCH sent by the second network device.
  • the activated BWP of the second cell is associated with two CORESETs (denoted as CORESET#1 and CORESET#2), and these two CORESETs have independently corresponding second information, with the second information as bits Sequence as an example, assuming that the second information corresponding to CORESET#1 is (1, 0, 0, 0), and the second information corresponding to CORESET#2 is (0, 1, 0, 1), where 1 means activation and 0 means If not activated, it means that the first TCI state in the TCI state set corresponding to CORESET#1 is activated, and the second and fourth TCI states in the TCI state set corresponding to CORESET#2 are activated, and the terminal device uses the above three The activated TCI monitors the PDCCH sent by the second network device.
  • bit sequence in the foregoing exemplary embodiments is for the purpose of example only, and does not represent a limitation on the format of the bit sequence.
  • the terminal device can carry the beam measurement results of the second cell in the measurement report sent to the first cell, and the first cell can use these beam measurement results when requesting handover The results are forwarded to the second cell, so that the second cell can be assisted in activating a suitable TCI state set, for example, several beams with better beam measurement results are selected as activated TCI states.
  • the terminal device uses at least one activated TCI state corresponding to at least one CORESET associated with the activated BWP of the target cell to monitor the PDCCH sent by the target network device, which can prevent the terminal device from receiving Monitor the PDCCH on the beam to achieve the purpose of power saving for terminal equipment.
  • this embodiment scheme has an advantage that the TCI state can be configured at one time, and subsequent network devices want to activate other TCI states through MAC CE. TCI status.
  • FIG. 10 shows a flowchart of a PDCCH monitoring method provided by another embodiment of the present application.
  • the method can be applied to the network architecture shown in Figure 1, and the method can include the following steps (1010-1020):
  • Step 1010 the second network device sends a switching command to the first network device, the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device.
  • Step 1020 the second network device sends a PDCCH on the target BWP, wherein the terminal device monitors the PDCCH based on the CORESET associated with the target BWP.
  • the target BWP is the initial BWP of the second cell.
  • the terminal device monitoring the PDCCH based on the CORESET associated with the initial BWP of the second cell reference may be made to the foregoing embodiments, and details are not repeated here.
  • the target BWP is the activated BWP of the second cell.
  • the target BWP may be determined by the second network device. That is, it is determined by the second network device whether the target BWP is the initial BWP or the activation BWP.
  • the second network device determines that the target BWP is the initial BWP of the second cell or the activated BWP of the second cell according to the reference information; wherein the reference information includes at least one of the following: service requirements, BWP load, and terminal type.
  • the second network device can determine the target BWP according to business requirements. Since the bandwidth corresponding to the initial BWP is relatively small, the amount of traffic that can be carried is relatively small. Therefore, when the business demand is small, the second network device determines the initial BWP as the target BWP. BWP; otherwise, in the case of a large service demand, the second network device determines the activated BWP as the target BWP.
  • the BWP load can be measured to some extent by the number of terminal devices using BWP.
  • the second network device determines the BWP with a smaller load as the target BWP by comparing the load of the initial BWP with the load of the activated BWP. For example, the number of terminal devices using the initial BWP is 3, and the number of terminal devices using the activated BWP is 30. At this time, the load of the initial BWP is small, and the second network device determines the initial BWP as the target BWP.
  • the terminal types are distinguished according to the maximum transmission power of the terminal equipment.
  • terminal equipment can be divided into the first type of terminal equipment (also called low-power terminal equipment, such as RedCap terminal equipment) and the second type of terminal equipment (also called ordinary terminal equipment), the maximum The transmission power is small, the data transmission rate is slow, and the initial BWP with a small bandwidth can meet its needs.
  • the transmission power of low-power terminal equipment is lower than 20dBm; the maximum transmission power of ordinary terminal equipment is relatively large, and the data transmission rate is faster. Therefore, a larger bandwidth is required for data transmission.
  • the second network device determines that the terminal device is a low-power terminal device, it determines the initial BWP as the target BWP; otherwise, when it determines that the terminal device is a common terminal device, it determines the active BWP as the target BWP. For example, the second network device determines that the maximum transmission power of the terminal device is 15 dBm through the handover request sent by the first network device, and the terminal device is a low-power terminal device, and the second network device determines the initial BWP as the target BWP.
  • the handover command includes third information, and the third information is used to instruct the terminal device to monitor the PDCCH based on the CORESET associated with the initial BWP of the second cell, or to monitor the PDCCH based on the CORESET associated with the activated BWP of the second cell.
  • the second network device After the second network device determines the type of the target BWP, it can configure the third information in the handover command to instruct the terminal device to monitor the target BWP of the PDCCH, if the third information in the handover command instructs the terminal device to use the CORESET associated with the initial BWP to monitor PDCCH, the terminal device uses the CORESET associated with the initial BWP to monitor the PDCCH; if the third information in the handover command indicates that the terminal device uses the CORESET associated with the activated BWP to monitor the PDCCH, the terminal device uses the CORESET associated with the activated BWP to monitor the PDCCH.
  • the third information may be represented by 1 bit, for example, 0 indicates that the second network device instructs the terminal device to use the CORESET associated with the initial BWP to monitor the PDCCH, and 1 indicates that the second network device instructs the terminal device to use the CORESET associated with the activated BWP Monitor PDCCH.
  • the number of terminal devices connected to the initial BWP of the second cell is 10, and the number of terminal devices connected to the activated BWP is 2.
  • the second network device determines that the load of the activated BWP is small, and determines the activated BWP as The target BWP, and write the relevant configuration of the activated BWP and the third information in the handover command, where the third information is a bit character with a value of 1, and the third information is used to instruct the terminal device to use the activated BWP of the second cell to associate
  • the CORESET monitors the PDCCH.
  • the configuration information of the activated BWP of the second cell is added to the handover command; or, when the target BWP is determined to be the initial BWP of the second cell , the configuration information of the activated BWP of the second cell is not added to the handover command.
  • the second network device determines that the target BWP is the activated BWP of the second cell, the second network device configures the relevant information of the activated BWP in the handover command, and the relevant information of the activated BWP includes at least one or more information corresponding to the CORESET associated with the activated BWP.
  • the relevant information of activating the BWP may also include the first information and/or the second information introduced above. If the second network device determines that the target BWP is the initial BWP of the second cell, the second network device does not add the configuration information of the activated BWP of the second cell to the handover command.
  • the second network device adds the configuration information of the initial BWP of the second cell to the handover command, and the terminal device based on the initial BWP configuration information in the handover command
  • the BWP configuration information determines the initial BWP of the second cell, and uses the CORESET associated with the initial BWP to monitor the PDCCH sent by the second network device.
  • the second network device does not add the configuration information of the initial BWP of the second cell to the handover command, and after the terminal device receives the handover command, It is found that there is no initial BWP nor activated BWP configuration information in the handover command.
  • the terminal device determines the initial BWP of the first cell as the initial BWP of the second cell, and uses the CORESET associated with the initial BWP to monitor the second cell. 2. The PDCCH sent by the network device.
  • the second network device determines that the maximum transmit power of the terminal device is 31dBm through the handover request sent by the first network device, and the terminal device is an ordinary terminal device.
  • the second network device determines the active BWP as the target BWP, and adds The configuration information of the activated BWP of the second cell, and the terminal device monitors the PDCCH through the CORESET associated with the activated BWP of the second cell.
  • the second network device determines that the service demand is small, determines the initial BWP as the target BWP, and determines that the target BWP is the initial BWP of the second cell, and does not add the configuration information of the activated BWP of the second cell to the handover command , and at the same time do not add the configuration information of the initial BWP in the switching command.
  • the terminal device determines that the handover command does not include the configuration information of the activated BWP and determines that the handover command does not include the configuration information of the initial BWP, and the terminal device uses the initial BWP configuration information of the first cell as the initial BWP configuration information of the second cell.
  • the terminal device uses the CORESET associated with the initial BWP to monitor the PDCCH sent by the second terminal device.
  • reference information such as service requirements, BWP load, terminal type and third information in the above exemplary embodiments is only for the purpose of example, and does not mean to limit the form and content of the above information.
  • the second network device generates a handover command
  • the first network device forwards the handover command
  • the terminal device after receiving the handover command, the terminal device, based on the CORESET associated with the target BWP of the target cell, , monitor the PDCCH sent by the target cell, so that the terminal device can accurately monitor the PDCCH, so as to obtain available uplink resources from the PDCCH to send a handover completion message, and improve the handover success rate.
  • this embodiment provides a method for the second network device to determine the target BWP through reference information.
  • the second network device can flexibly determine the target BWP through the reference information, which is helpful for rational use of BWP resources, and at the same time enables the terminal device to communicate with the handover The target BWP in the command matches.
  • the above-mentioned steps performed by the terminal device can be independently implemented as a PDCCH on the terminal device side.
  • the above-mentioned steps performed by the first network device can be independently implemented as a PDCCH monitoring method on the first network device side
  • the above-mentioned steps performed by the second network device can be independently implemented as a PDCCH monitoring method on the second network device side.
  • FIG. 11 it shows a block diagram of a PDCCH monitoring device provided by an embodiment of the present application.
  • the apparatus has the function of realizing the above-mentioned method example on the terminal device side, and the function may be realized by hardware, or may be realized by executing corresponding software by hardware.
  • the apparatus may be the terminal device described above, or may be set in the terminal device.
  • the apparatus 1100 may include: a receiving module 1110 and a monitoring module 1120 .
  • the receiving module 1110 is configured to receive a switching command sent by the first network device, the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device.
  • the monitoring module 1120 is configured to monitor the PDCCH sent by the second network device based on the control resource set CORESET associated with the target bandwidth part BWP of the second cell.
  • the target BWP is the initial BWP of the second cell.
  • the monitoring module 1120 is configured to receive the PDCCH sent by the second network device on all receiving beams of the terminal device in a beam scanning manner when it is determined that the CORESET associated with the initial BWP of the second cell monitors the PDCCH. PDCCH.
  • the monitoring module 1120 is configured to determine at least one target receiving beam from all receiving beams of the terminal device according to the beam measurement result when it is determined that the CORESET associated with the initial BWP of the second cell monitors the PDCCH, Receive the PDCCH sent by the second network device on the target receiving beam.
  • the apparatus 1100 further includes a determining module (not shown in FIG. 11 ), which is configured to, according to the initial BWP configuration information of the second cell, according to the initial The BWP configuration information determines the initial BWP of the second cell; or, if the handover command does not include the configuration information of the initial BWP of the second cell, determines the initial BWP of the first cell as the initial BWP of the second cell.
  • a determining module (not shown in FIG. 11 ), which is configured to, according to the initial BWP configuration information of the second cell, according to the initial The BWP configuration information determines the initial BWP of the second cell; or, if the handover command does not include the configuration information of the initial BWP of the second cell, determines the initial BWP of the first cell as the initial BWP of the second cell.
  • the target BWP is the activated BWP of the second cell.
  • the handover command includes the configuration information of the activated BWP of the second cell; wherein the activated BWP configuration information is used to indicate the activated BWP, at least one CORESET associated with the activated BWP, and the corresponding configuration of each CORESET in the at least one CORESET A set of TCI states.
  • the monitoring module 1120 is configured to monitor the PDCCH sent by the second network device by using the TCI state set configured corresponding to at least one CORESET associated with the activated BWP of the second cell.
  • the behavior of the terminal device using the configured TCI state set to monitor the PDCCH is stipulated by the protocol.
  • the terminal device uses the configured TCI state set to monitor the PDCCH.
  • the behavior of the terminal device monitoring the PDCCH by using the configured TCI state set is configured by the network.
  • the handover command further includes first information, where the first information is used to instruct the terminal device to use or not use the configured TCI state set to monitor the PDCCH.
  • the monitoring module 1120 is configured to monitor the PDCCH sent by the second network device by using at least one activated TCI state corresponding to at least one CORESET associated with the activated BWP of the second cell.
  • the switching command further includes second information, where the second information is used to indicate the state of at least one activated TCI.
  • the second information includes a bit sequence, and each bit in the bit sequence is used to indicate whether a corresponding TCI state is active or inactive.
  • each CORESET has independently corresponding second information, or at least two CORESETs share the same second information.
  • the handover command is a RACH-less handover command
  • the RACH-less handover command is used to instruct the terminal device to perform a RACH-less handover process.
  • the receiving module 1110 is configured to receive a radio resource control RRC message sent by the first access network device, where the RRC message includes information for instructing the terminal device to perform a RACH-less handover process .
  • the handover command includes third information, and the third information is used to instruct the terminal device to monitor the PDCCH based on the CORESET associated with the initial BWP of the second cell, or to monitor the PDCCH based on the first The CORESET associated with the activated BWP of the second cell monitors the PDCCH.
  • the terminal device monitors the second network based on the CORESET associated with the activated BWP of the second cell.
  • PDCCH sent by the device
  • the terminal device listens to the second network device based on the CORESET associated with the initial BWP of the second cell PDCCH sent.
  • the second network device determines, according to reference information, that the target BWP is the initial BWP of the second cell or the activated BWP of the second cell; wherein the reference information includes at least one of the following: service Demand, BWP load, terminal type.
  • the technical solution provided by this embodiment enables the terminal device to monitor the PDCCH accurately based on the CORESET associated with the target BWP of the target cell after the terminal device receives the handover command. Therefore, available uplink resources are obtained from the PDCCH to send a handover completion message, thereby improving the handover success rate.
  • FIG. 12 it shows a block diagram of a PDCCH monitoring device provided by another embodiment of the present application.
  • the apparatus has the function of implementing the above-mentioned method example on the first network device side, and the function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the apparatus may be the first network device described above, or may be set in the first network device.
  • the apparatus 1200 may include: a sending module 1210 .
  • a sending module 1210 configured to send a switching command to the terminal device, where the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device;
  • the terminal device monitors the PDCCH sent by the second network device based on the control resource set CORESET associated with the target bandwidth part BWP of the second cell.
  • the target BWP is the initial BWP of the second cell.
  • the terminal device receives the PDCCH sent by the second network device on all receiving beams of the terminal device in a beam scanning manner.
  • the terminal device determines at least one target receiving beam from all receiving beams of the terminal device according to the beam measurement result, and receives the PDCCH sent by the second network device on the target receiving beam.
  • the terminal device determines the initial BWP of the second cell according to the configuration information of the initial BWP of the second cell; or, the handover command does not include If the configuration information of the initial BWP of the second cell is included, the terminal device determines the initial BWP of the first cell as the initial BWP of the second cell.
  • the target BWP is the activated BWP of the second cell.
  • the handover command includes the configuration information of the activated BWP of the second cell; wherein the activated BWP configuration information is used to indicate the activated BWP, at least one CORESET associated with the activated BWP, and the corresponding configuration of each CORESET in the at least one CORESET A set of transport configurations indicating the TCI state.
  • the terminal device monitors the PDCCH sent by the second network device by using the TCI state set configured corresponding to at least one CORESET associated with the activated BWP of the second cell.
  • the behavior that the terminal device uses the configured TCI state set to monitor the PDCCH is stipulated by the protocol.
  • the terminal device uses the configured TCI state set to monitor the PDCCH.
  • the behavior that the terminal device uses the configured TCI state set to monitor the PDCCH is configured by the network.
  • the handover command further includes first information, and the first information is used to instruct the terminal device to use or not use the configured TCI state set to monitor the PDCCH.
  • the terminal device monitors the PDCCH sent by the second network device by using at least one activated TCI state corresponding to at least one CORESET associated with the activated BWP of the second cell.
  • the switching command further includes second information, where the second information is used to indicate the state of at least one activated TCI.
  • the second information includes a bit sequence, and each bit in the bit sequence is used to indicate whether a corresponding TCI state is active or inactive.
  • each CORESET has independently corresponding second information, or at least two CORESETs share the same second information.
  • the handover command is a RACH-less handover command
  • the RACH-less handover command is used to instruct the terminal device to perform a RACH-less handover process.
  • the sending module 1210 is configured to send a radio resource control RRC message to the terminal device, where the RRC message includes information used to instruct the terminal device to perform a RACH-less handover process.
  • the terminal device after receiving the handover command, the terminal device monitors the PDCCH sent by the target cell based on the CORESET associated with the target BWP of the target cell, so that the terminal device can accurately monitor the PDCCH , so as to obtain available uplink resources from the PDCCH to send a handover completion message, thereby improving the handover success rate.
  • FIG. 13 it shows a block diagram of a PDCCH monitoring device provided by another embodiment of the present application.
  • the apparatus has the function of realizing the above-mentioned method example on the side of the second network device, and the function may be realized by hardware, or may be realized by executing corresponding software by hardware.
  • the apparatus may be the second network device described above, or may be set in the second network device.
  • the apparatus 1300 may include: a sending module 1310 .
  • a sending module 1310 configured to send a switching command to the first network device, where the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell corresponding to the second network device ;
  • the sending module 1310 is further configured to send a PDCCH in the target bandwidth part BWP, wherein the terminal device monitors the PDCCH based on the control resource set CORESET associated with the target BWP.
  • the target BWP is the initial BWP of the second cell.
  • the handover command includes configuration information of the activated BWP of the second cell; wherein the configuration information of the activated BWP is used to indicate the activated BWP and at least one CORESET associated with the activated BWP, And a set of transmission configurations corresponding to each CORESET in the at least one CORESET indicates a TCI state.
  • the terminal device monitors the PDCCH sent by the second network device by using the TCI state set configured corresponding to at least one CORESET associated with the activated BWP of the second cell.
  • the terminal device uses the configured TCI state set to monitor the PDCCH.
  • the handover command further includes first information, where the first information is used to instruct the terminal device to use or not use the configured TCI state set to monitor the PDCCH.
  • the terminal device monitors the PDCCH sent by the second network device by using at least one activated TCI state corresponding to at least one CORESET associated with the activated BWP of the second cell.
  • the switching command further includes second information, where the second information is used to indicate the state of the at least one activated TCI.
  • the second information includes a bit sequence, and each bit in the bit sequence is used to indicate whether a corresponding TCI state is active or inactive.
  • each CORESET has independently corresponding second information
  • the handover command is a RACH-less handover command
  • the RACH-less handover command is used to instruct the terminal device to perform a RACH-less handover process.
  • the device further includes a determining module (not shown in FIG. 13 ) for:
  • the target BWP is the initial BWP of the second cell or the activated BWP of the second cell according to reference information; wherein the reference information includes at least one of the following: service requirements, BWP load, and terminal type.
  • the handover command includes third information, and the third information is used to instruct the terminal device to monitor the PDCCH based on the CORESET associated with the initial BWP of the second cell, or to monitor the PDCCH based on the first The CORESET associated with the activated BWP of the second cell monitors the PDCCH.
  • the device further includes an adding module (not shown in FIG. 13 ), configured to:
  • configuration information of the activated BWP of the second cell is not added to the handover command.
  • the terminal device after receiving the handover command, the terminal device monitors the PDCCH sent by the target cell based on the CORESET associated with the target BWP of the target cell, so that the terminal device can accurately monitor the PDCCH , so as to obtain available uplink resources from the PDCCH to send a handover completion message, thereby improving the handover success rate.
  • the device provided by the above embodiment realizes its functions, it only uses the division of the above-mentioned functional modules as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • FIG. 14 shows a structural block diagram of a terminal device 140 provided by an embodiment of the present application.
  • the terminal device 140 may be used to execute the above-mentioned PDCCH monitoring method on the terminal device side.
  • the terminal device 140 may include: a processor 141 , a receiver 142 , a transmitter 143 , a memory 144 and a bus 145 .
  • the processor 141 includes one or more processing cores, and the processor 141 executes various functional applications and information processing by running software programs and modules.
  • the receiver 142 and the transmitter 143 can be realized as a transceiver 146, and the transceiver 146 can be a communication chip.
  • the memory 144 is connected to the processor 141 through the bus 145 .
  • the memory 144 may be used to store a computer program, and the processor 141 is used to execute the computer program, so as to implement various steps performed by the terminal device in the foregoing method embodiments.
  • memory 144 can be realized by any type of volatile or nonvolatile storage device or their combination, and volatile or nonvolatile storage device includes but not limited to: RAM (Random-Access Memory, random access memory) And ROM (Read-Only Memory, read-only memory), EPROM (Erasable Programmable Read-Only Memory, erasable programmable read-only memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, electrically erasable programmable read-only memory memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory, CD-ROM), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cartridges, tapes, disks storage or other magnetic storage devices.
  • RAM Random-Access Memory, random access memory
  • ROM Read-Only Memory, read-only memory
  • EPROM Erasable Programmable Read-Only Memory, erasable programmable read-only memory
  • EEPROM Electrically Eras
  • the transceiver 146 is configured to receive a switching command sent by the first network device, and the switching command is used to instruct the terminal device to switch from the first cell corresponding to the first network device to the second cell.
  • the transceiver 146 is further configured to monitor the PDCCH sent by the second network device based on the CORESET associated with the target BWP of the second cell.
  • FIG. 15 shows a structural block diagram of a network device 150 provided by an embodiment of the present application.
  • the network device 150 may be used to implement the above PDCCH monitoring method on the first network device side or the second network device side.
  • the network device 150 may include: a processor 151 , a receiver 152 , a transmitter 153 , a memory 154 and a bus 155 .
  • the processor 151 includes one or more processing cores, and the processor 151 executes various functional applications and information processing by running software programs and modules.
  • the receiver 152 and the transmitter 153 can be realized as a transceiver 156, and the transceiver 156 can be a communication chip.
  • the memory 154 is connected to the processor 151 through the bus 155 .
  • the memory 154 may be used to store a computer program, and the processor 151 is used to execute the computer program, so as to implement various steps performed by the first network device or the second network device in the foregoing method embodiments.
  • memory 154 can be realized by any type of volatile or nonvolatile storage device or their combination, and volatile or nonvolatile storage device includes but not limited to: RAM (Random-Access Memory, random access memory) And ROM (Read-Only Memory, read-only memory), EPROM (Erasable Programmable Read-Only Memory, erasable programmable read-only memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, electrically erasable programmable read-only memory memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory, CD-ROM), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cartridges, tapes, disks storage or other magnetic storage devices.
  • RAM Random-Access Memory, random access memory
  • ROM Read-Only Memory, read-only memory
  • EPROM Erasable Programmable Read-Only Memory, erasable programmable read-only memory
  • EEPROM Electrically Eras
  • the transceiver 156 when the network device 150 is the first network device, the transceiver 156 is configured to send a switching command to the terminal device, and the switching command is used to instruct the terminal device to switch from the The first cell corresponding to the first network device is switched to the second cell corresponding to the second network device;
  • the terminal device monitors the PDCCH sent by the second network device based on the CORESET associated with the target BWP of the second cell.
  • the transceiver 156 is configured to send a switching command, and the switching command is used to instruct the terminal device to switch from the first network device to The corresponding first cell is switched to the second cell corresponding to the second network device;
  • the transceiver 156 is further configured to send a PDCCH in the target bandwidth part BWP, wherein the terminal device monitors the PDCCH based on the control resource set CORESET associated with the target BWP.
  • the processor 151 is configured to determine, according to reference information, that the target BWP is the initial BWP of the second cell or the activated BWP of the second cell; wherein the reference information includes at least one of the following: Business requirements, BWP load, terminal type.
  • the embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is used to be executed by a processor of the device, so as to implement the above PDCCH monitoring method.
  • the computer-readable storage medium may include: ROM (Read-Only Memory, read-only memory), RAM (Random-Access Memory, random access memory), SSD (Solid State Drives, solid state drive) or an optical disc, etc.
  • the random access memory may include ReRAM (Resistance Random Access Memory, resistive random access memory) and DRAM (Dynamic Random Access Memory, dynamic random access memory).
  • the embodiment of the present application also provides a chip, the chip includes a programmable logic circuit and/or program instructions, and when the chip runs on a device, it is used to implement the above PDCCH monitoring method.
  • the embodiment of the present application also provides a computer program product or computer program, the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and the processor of the device can read from the computer The computer instruction is read and executed by reading the storage medium, so as to realize the above PDCCH monitoring method.
  • the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.
  • the "plurality” mentioned herein means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently.
  • the character “/” generally indicates that the contextual objects are an "or” relationship.
  • the numbering of the steps described herein only exemplarily shows a possible sequence of execution among the steps.
  • the above-mentioned steps may not be executed according to the order of the numbers, such as two different numbers
  • the steps are executed at the same time, or two steps with different numbers are executed in the reverse order as shown in the illustration, which is not limited in this embodiment of the present application.
  • the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof.
  • the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

本申请公开了一种PDCCH监听方法、装置、设备及存储介质，涉及通信技术领域。所述方法包括：第一网络设备向终端设备发送切换命令，切换命令用于指示终端设备从第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；终端设备基于第二小区的目标BWP相关联的CORESET，监听第二网络设备发送的PDCCH。本申请通过终端设备在接收到切换命令之后，基于目标小区的目标BWP相关联的CORESET，监听目标小区发送的PDCCH，使得终端设备能够准确地监听PDCCH，从而从PDCCH中获得可用的上行资源来发送切换完成消息，提升切换成功率。

Description

PDCCH监听方法、装置、设备及存储介质 技术领域
本申请实施例涉及通信技术领域，特别涉及一种PDCCH(Physical Downlink Control Channel，物理下行控制信道)监听方法、装置、设备及存储介质。
背景技术
针对终端设备的小区切换场景，在一些切换方式下，终端设备监听目标小区的PDCCH(Physical Downlink Control Channel，物理下行控制信道)，等待目标小区调度上行传输，并用调度的上行资源发送切换完成消息。
目前，针对PDCCH的监听方法，还需进一步研究。
发明内容
本申请实施例提供了一种PDCCH监听方法、装置、设备及存储介质。所述技术方案如下：
根据本申请实施例的一个方面，提供了一种PDCCH监听方法，所述方法由终端设备执行，所述方法包括：
接收第一网络设备发送的切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
基于所述第二小区的目标BWP(Bandwidth Part，带宽部分)相关联的CORESET(Control Resource Set，控制资源集)，监听所述第二网络设备发送的PDCCH。
根据本申请实施例的一个方面，提供了一种PDCCH监听方法，所述方法由第一网络设备执行，所述方法包括：
向终端设备发送切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
其中，所述终端设备基于所述第二小区的目标BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH。
根据本申请实施例的一个方面，提供了一种PDCCH监听方法，所述方法由第二网络设备执行，所述方法包括：
向第一网络设备发送切换命令，所述切换命令用于指示终端设备从所述第一网络设备对应的第一小区，切换至所述第二网络设备对应的第二小区；
在目标BWP发送PDCCH，其中，所述终端设备基于所述目标BWP相关联的CORESET监听所述PDCCH。
根据本申请实施例的一个方面，提供了一种PDCCH监听装置，所述装置包括：
接收模块，用于接收第一网络设备发送的切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
监听模块，用于基于所述第二小区的目标BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH。
根据本申请实施例的一个方面，提供了一种PDCCH监听装置，所述装置包括：
发送模块，用于向终端设备发送切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
其中，所述终端设备基于所述第二小区的目标BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH。
根据本申请实施例的一个方面，提供了一种PDCCH监听装置，所述装置包括：
发送模块，用于向第一网络设备发送切换命令，所述切换命令用于指示终端设备从所述第一网络设备对应的第一小区，切换至所述第二网络设备对应的第二小区；
所述发送模块，还用于在目标BWP发送PDCCH，其中，所述终端设备基于所述目标BWP相关联的CORESET监听所述PDCCH。
根据本申请实施例的一个方面，提供了一种PDCCH监听装置，所述装置包括：
发送模块，用于向第一网络设备发送切换命令，所述切换命令用于指示终端设备从所述第一网络设备对应的第一小区，切换至所述第二网络设备对应的第二小区；
所述发送模块，还用于在目标带宽部分BWP发送PDCCH，其中，所述终端设备基于所述目标BWP相关联的控制资源集CORESET监听所述PDCCH。
根据本申请实施例的一个方面，提供了一种终端设备，所述终端设备包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述计算机程序以实现上述终端设备侧的PDCCH监听方法。
根据本申请实施例的一个方面，提供了一种网络设备，所述网络设备包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述计算机程序以实现上述第一网络设备侧的PDCCH监听方法，或者实现上述第二网络设备侧的PDCCH监听方法。
根据本申请实施例的一个方面，提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被处理器执行，以实现上述PDCCH监听方法。
根据本申请实施例的一个方面，提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片运行时，用于实现上述PDCCH监听方法。
根据本申请实施例的一个方面，提供了一种计算机程序产品或计算机程序，所述计算机程序产品或计算机程序包括计算机指令，所述计算机指令存储在计算机可读存储介质中，处理器从所述计算机可读存储介质读取并执行所述计算机指令，以实现上述PDCCH监听方法。
本申请实施例提供的技术方案可以包括如下有益效果：
通过终端设备在接收到切换命令之后，基于目标小区的目标BWP相关联的CORESET，监听目标小区发送的PDCCH，使得终端设备能够准确地监听PDCCH，从而从PDCCH中获得可用的上行资源来发送切换完成消息，提升切换成功率。
附图说明
图1是本申请一个实施例提供的网络架构的示意图；
图2示例性示出了NR系统中RRC状态间的切换关系的示意图；
图3示例性示出了NR系统中小区切换过程的示意图；
图4示例性示出了NR系统中带宽的自适应变化过程的示意图；
图5示例性示出了用于指示PDCCH相对应TCI状态的MAC CE格式的示意图；
图6是本申请一个实施例的PDCCH监听方法的流程图；
图7是本申请另一个实施例的PDCCH监听方法的流程图；
图8是本申请另一个实施例的PDCCH监听方法的流程图；
图9是本申请另一个实施例的PDCCH监听方法的流程图；
图10是本申请另一个实施例的PDCCH监听方法的流程图；
图11是本申请一个实施例提供的PDCCH监听装置的框图；
图12是本申请另一个实施例提供的PDCCH监听装置的框图；
图13是本申请另一个实施例提供的PDCCH监听装置的框图；
图14是本申请一个实施例提供的终端设备的结构示意图；
图15是本申请一个实施例提供的网络设备的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
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地说明本申请实施例的技术方案，并不构成对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。
请参考图1，其示出了本申请一个实施例提供的网络架构的示意图。该网络架构可以包括：终端设备10、接入网设备20和核心网设备30。
终端设备10可以指UE(User Equipment，用户设备)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、无线通信设备、用户代理或用户装置。可选地，终端设备10还可以是蜂窝电话、无绳电话、SIP(Session Initiation Protocol，会话启动协议)电话、WLL(Wireless Local Loop，无线本地环路)站、PDA(Personal Digita1Assistant，个人数字处理)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，5GS(5th Generation System，第五代移动通信系统)中的终端设备或者未来演进的PLMN(Pub1ic Land Mobi1e Network，公用陆地移动通信网络)中的终端设备等，本申请实施例对此并不限定。为方便描述，上面提到的设备统称为终端设备。终端设备10的数量通常为多个，每一个接入网设备20所管理的小区内可以分布一个或多个终端设备10。
接入网设备20是一种部署在接入网中用以为终端设备10提供无线通信功能的设备。接入网设备20可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备接入网设备功能的设备的名称可能会有所不同，例如在5G NR系统中，称为gNodeB或者gNB。随着通信技术的演进，“接入网设备”这一名称可能会变化。为方便描述，本申请实施例中，上述为终端设备10提供 无线通信功能的装置统称为接入网设备。可选地，通过接入网设备20，终端设备10和核心网设备30之间可以建立通信关系。示例性地，在LTE(Long Term Evolution，长期演进)系统中，接入网设备20可以是EUTRAN(Evolved Universal Terrestrial Radio Access Network，演进的通用陆地无线网)或者EUTRAN中的一个或者多个eNodeB；在NR系统中，接入网设备20可以是RAN(Radio Access Network，无线接入网)或者RAN中的一个或者多个gNB。在本申请实施例中，所述的网络设备除特别说明之外，是指接入网设备20。
核心网设备30的功能主要是提供用户连接、对用户的管理以及对业务完成承载，作为承载网络提供到外部网络的接口。例如，5G NR系统中的核心网设备可以包括AMF(Access and Mobility Management Function，接入和移动性管理功能)实体、UPF(User Plane Function，用户平面功能)实体和SMF(Session Management Function，会话管理功能)实体等设备。
在一个示例中，接入网设备20与核心网设备30之间通过某种空口技术互相通信，例如5G NR(New Radio，新空口)系统中的NG接口。接入网设备20与终端10之间通过某种空口技术互相通信，例如Uu接口。
本申请实施例中的“5G NR系统”也可以称为5G系统或者NR系统，但本领域技术人员可以理解其含义。本申请实施例描述的技术方案可以适用于5G NR系统，也可以适用于5G NR系统后续的演进系统。
本申请实施例中的UE与终端设备表达同一含义，两者可以相互替换；网络设备与接入网设备表达同一含义，两者可以相互替换。
通信系统通常支持连接态终端设备的切换过程。当正在使用网络服务的用户从一个小区移动到另一个小区，或由于无线传输业务负荷量调整、激活操作维护、设备故障等原因，为了保证通信的连续性和服务的质量，系统要将该用户与原小区的通信链路转移到新的小区上，即执行切换过程。因此，终端设备可以从第一网络设备的小区切换到第二网络设备的小区。在这种情况下，第一网络设备可以称为源网络设备、源接入网设备或源基站，第二网络设备可以称为目标网络设备、目标接入网设备或目标基站。
在介绍本申请技术方案之前，先对RRC(Radio Resource Control，无线资源控制)协议进行介绍说明。
RRC协议的功能包括：广播系统信息，RRC连接控制，RAT(Radio Access Type，无线接入类型)间转移，测量配置与报告，通用协议错误处理，自配置与自优化，等等。
在NR系统中，RRC状态包括RRC_CONNECTED(连接)状态、RRC_IDLE(空闲)状态和RRC_INACTIVE(非激活)状态，其中：
RRC_IDLE状态，用于在终端设备与自身高层配置建立连接请求时，进行无线资源和无线信道的控制。RRC IDLE状态支持的操作包括：进行小区重选、由5GC(5G Core Network，5G核心网)启动的移动终止数据的寻呼、由5GC管理的移动终止数据区域的寻呼广播系统消息、PLMN(Public Land Mobile Network，公共陆地移动(通信)网络)等。其中，寻呼由CN(Core Network，核心网)发起，寻呼区域由CN配置。网络设备侧不存在UE AS(Access Stratum，接入层)上下文。处于RRC_IDLE状态的终端设备，其特征是终端设备未保留RRC上下文(RRC Context)，终端设备未与网络设备建立RRC连接。RRC上下文中包括终端设备的接口消息中的参数等，RRC上下文的具体内容由终端设备和网络设备的行为确定。处于RRC_IDLE状态的终端设备不存在待传送的数据，自身将进入休眠状态，关闭收发单元以降低功耗。处于RRC_IDLE状态的终端设备仅周期性地唤醒以接收可能的寻呼消息，即不连续接收。
RRC_CONNECTED状态，用于终端设备与网络设备建立RRC连接并进行数据传输。RRC_CONNECTED状态支持的操作包括，将终端设备的AS上下文存储在终端设备与网络设备中，从终端设备开始进行单播数据传送等。处于RRC_CONNECTED状态的终端设备已建立了RRC上下文，终端设备与网络设备之间建立通信所必需的全部参数均已为通信双方所知，网络设备为接入的终端设备分配了C-RNTI(Cell-Radio Network Temporary Identifier，小区无线网络临时标识)，终端设备与网络设备共同处于CM_CONNECTED(Connection Management，连接管理)状态。此时，若终端设备正在传送数据，则终端设备处于连续接收状态。直至数据传送完成，终端设备进入等待状态时，切换为DRX(Discontinuous Reception，非连续接收)连接态，以节省功耗。当终端设备存在待传送数据时，切换回连续接收状态。
RRC_INACTIVE是在5G NR网络环境中，以降低空口信令开销和快速恢复无线连接，快速恢复数据业务为目的定义的一个新的RRC状态。当终端设备处于RRC_INACTIVE状态时，终端设备和一个网络设备之间保留了RRC上下文，一个网络设备是指与终端设备建立连接的所有网络设备中的任意一个，终端设备与核心网处于CM_CONNECTED状态。此时，终端设备与网络设备切换到连接态以进行数据接收的流程相对较快，同时不会产生额外的信令开销并且处于RRC_INACTIVE状态的终端设备会进入休眠状态，减少功耗。
如图2所示，其示出在NR系统中，RRC状态间的切换关系示意图。
其中，RRC_IDLE状态与RRC_CONNECTED状态之间存在双向切换，RRC_IDLE状态通过建立新连 接切换到RRC_CONNECTED状态，RRC_CONNECTED状态通过释放终端设备的资源切换到RRC_IDLE状态。RRC_INACTIVE状态与RRC_CONNECTED状态之间也存在双向切换，RRC_INACTIVE状态通过建立连接切换成RRC_CONNECTED状态，RRC_CONNECTED状态通过去激活切换成RRC_INACTIVE状态，RRC_IDLE状态与RRC_INACTIVE状态之间不存在双向切换，RRC_INACTIVE状态可以切换到RRC_IDLE状态，具体过程处于FFS(For Further Study，供进一步研究)状态。
此外，RRC_IDLE状态，RRC_CONNECTED状态和RRC_INACTIVE状态间的区别还在于移动性的管理方面。RRC_IDLE状态或RRC_INACTIVE状态的移动性基于终端设备的小区重选实现，RRC_CONNECTED状态的移动性则是由网络侧基于测量实现的。
请参考图3，其示出了NR系统中，终端切换过程示意图。
终端设备处于移动状态时可能会导致服务小区的信号质量变差，终端设备通过切换过程与信号质量更好的小区进行连接，保证终端设备具有连续的、不中断的通信服务。
当正在使用网络服务的用户从一个小区移动到另一个小区，或由于无线传输业务负荷量调整、激活操作维护、设备故障等原因，为了保证通信的连续性和服务的质量，系统要将该终端设备与原小区的通信链路转移到新的小区上，即执行切换过程。
以Xn接口切换过程为例，整个切换过程分为以下三个阶段。
在切换准备阶段，由AMF向基站提供移动性控制信息，终端设备和源基站之间进行测量控制和报告。源基站根据终端设备的测量报告做出切换决定之后，向目标基站发送切换请求(Handover Request)。目标基站执行准入控制，在确定允许终端设备切换的情况下，目标基站向源基站发送切换请求响应(Handover Request Acknowledge)。
在切换执行阶段，RAN(Radio Access Network，无线接入网)切换启动，终端设备从旧小区分离，同步到新小区。源基站向目标基站发送SN(Serial Number，序列号)状态转移(SN Status Transfer)。源基站从UPF获取缓冲数据和新数据，然后RAN将用户数据发送给目标基站。目标基站缓存来自源基站的用户数据。至此，RAN切换完成。
在切换完成阶段，目标基站向AMF发送路径切换请求(Path Switch Request)，AMF与UPF执行路径切换，之后UPF向源基站发送结束指示信息(End Marker)，源基站向目标基站转发该结束指示信息。AMF向目标基站发送路径切换请求响应(Path Switch Request Acknowledge)，目标基站向源基站指示将终端设备的上下文信息进行释放。
对于图3所示的切换流程，在网络实现上，源基站可以根据终端设备侧的测量上报(包含多个小区的测量结果)，针对多个目标小区同时或先后发起切换准备/请求消息(可以基于直连的X2/Xn接口，或者通过和MME(Mobility Management Entity，移动性管理实体)/AMF之间的S1/N2接口)。每个目标小区在收到切换准备/请求消息后根据自己的RRM(Radio Resource Management，无线资源管理)算法进行接入控制，并在通过接入控制的前提下向源小区所在基站发送切换请求应答消息(如接入控制未通过则响应切换请求失败消息)，其中携带目标小区生成的切换命令。源基站根据自己的RRM算法在返回切换应答的多个目标小区中选择一个作为最终的切换目标小区，并将与该目标小区对应的切换命令通过RRC(Radio Resource Control，无线资源控制)重配置消息发送给终端设备，进而实现网络对切换过程的完全控制。
终端设备的切换流程可以分成软切换与硬切换两类，其中，硬切换是源小区与目标小区载波频率不同的条件下，终端设备先与源小区断开连接，再与目标小区建立连接的切换过程。软切换是源小区与目标小区载波频率相同的条件下，终端设备先与目标小区建立稳定连接，再与源小区断开连接的切换过程，软切换能减少掉话现象发生，提高用户服务质量。
下面对NR系统中的BWP进行介绍说明。
在NR系统中，最小带宽5MHz，最大带宽为400MHz。最大带宽又称为宽带载波(Wideband Carrier)，终端设备工作在宽带载波上的终端设备会产生较大的功率消耗，且在宽带载波上工作的终端设备需要具有较高的性能，这将会提高终端设备的成本。NR系统中引入BWP概念，BWP是在一个载波中的部分带宽中，针对子载波间隔下，连续的公共资源块(CRB)集合。每个BWP拥有各自不同的带宽和频点，其SCS(Sub-Carrier Space，子载波间隔)和SSB(Synchronization Signal and PBCH Block，同步信号块)周期也可以差异化配置。网络设备可以根据就终端设备不同时刻的需求为其分配不同的BWP。BWP也称为带宽自适应变化。
请参考图4，其示例性示出了NR系统中，带宽的自适应变化过程。
在第一时刻，终端设备的业务量较大，NR系统为终端设备配置了带宽较大的BWP 1，在第二时刻，终端设备的业务量较小，系统为终端设备配置了较小的BWP 2，BWP 2可以满足终端设备此时的通信需求，在第三时刻，系统侦测到BWP 1所在的带宽内存在较大范围频率的选择性衰落，或BWP 1所在的频率范围内资源比较紧缺，系统为终端设备配置了新的带宽BWP 3。
终端设备的BWP按照传输方向分为UL BWP(Uplink BWP，上行BWP)与DL BWP(Downlink BWP， 下行BWP)，网络为处于RRC_CONNECTED状态的终端设备最多配置4个UL BWP和4个DL BWP，此外处于RRC_CONNECTED状态的终端设备一个时刻最多拥有一个激活的UL BWP和一个激活的DL BWP。
在频分双工系统(也称为全双工系统)中，终端设备与网络设备间进行通信需要两个独立的信道，一个信道用来向下传送消息，另一个信道用来向上传送消息，两个信道之间相互不影响，因此UL BWP与DL BWP之间不存在显式对应(Association)关系。在UL BWP与DL BWP中，一方发生改变，另外一方不会受到影响。例如，网络为终端设备配置了4个UL BWP的index(索引)分别为0，1，2，3；4个DL BWP的index分别为0，1，2，3。在某一时刻，激活的UL BWP的index为0，激活的DL BWP的index为1，通过DCI(Downlink Control Information，下行控制信息)指令切换DL BWP，切换后DL BWP的index变为2，UL BWP的index为0，保持不变。
接下来对NR系统中的PDCCH(Physical Downlink Control Channel，物理下行控制信道)配置进行介绍说明。
PDCCH主要承载PUSCH(Physical Uplink Control Channel，物理上行控制信道)和PUSCH(Physical Uplink Share Channel，物理上行共享信道)的DCI信息。根据作用域不同，PDCCH可以分为公共控制信息(公共搜索空间)与专用控制信息(专用搜索空间)。公共控制信息和专用控制信息定义了终端设备进行盲检的起始位置和信道的搜索方式。终端设备在搜索空间上的预定位置监听PDCCH，进行盲检。不同终端设备通过RNTI(Radio Network Temporary Identity，无线网络临时标识)信息区分各自的PDCCH。
终端设备在网络配置的PDCCH搜索空间上监听PDCCH。UE的每个DL BWP最多配置10个PDCCH搜索空间，每个PDCCH搜索空间关联一个CORESET。网络可以为终端设备的每个DL BWP配置最多3个CORESET，并为每一个CORESET配置一组TCI状态。某一时刻，一组TCI状态中只能存在一个处于激活状态的TCI状态。终端设备使用搜索空间对应的CORESET的激活TCI状态接收PDCCH。特别地，由于不存在与初始BWP的CORESET相对应的TCI状态集合，系统消息广播或切换命令会为初始BWP配置一个CORESET#0，终端设备需要在所有的SSB上监听PDCCH。
请参考图5，其示出了终端专属的用于指示PDCCH相对应的TCI状态的MAC CE(MAC Control Element，媒体接入层控制单元)的格式。
接下来对NR中的波束管理机制进行介绍说明。
NR系统引入波束管理机制支持多波束操作。波束管理机制包括波束扫描、波束测量、波束确定和波束报告。
(1)波束扫描：是指在特定周期或者时间段内，波束采用预先设定的方式进行发送和/或接收，以覆盖特定空间区域。
(2)波束测量：是指终端设备或者网络设备对所接收到的赋形信号的质量和特性进行测量的过程。波束管理过程中，终端设备或网络设备通过相关测量识别最好波束。
(3)波束确定：是指终端设备或网络设备选择信号质量最好的波束资源。
(4)波束报告：是指在确定信号质量最好的波束资源后，终端设备或者网络设备将所选择的波束信息通知给对端。
为了支持多波束操作，5G采用了波束管理机制，可以用于初始接入、控制信道和数据信道。
下面对RACH-less HO进行介绍。
在LTE(Long Term Evolution，长期演进)系统中，针对特定场景，例如在目标小区判断终端设备到源小区的TA(Timing Advance，定时提前量)和到目标小区的TA相同，或终端设备到目标小区的TA为0的场景下，目标小区在切换命令中可配置RACH-skip信息，即切换过程可以是RACH-less HO。RACH-skip信息中可以包含终端设备接入目标小区的上行资源，供终端设备发送切换完成消息。如果切换命令中没有配置上行资源，则终端设备需要监听目标小区的PDCCH，等待目标小区调度上行传输，用调度的上行资源传输切换完成消息。
在LTE系统中，由于不存在波束赋形，终端设备进行RACH-less切换过程，监听目标小区的PDCCH的行为比较简单。
在NR系统中，由于引入了波束赋形，PDCCH的接收需要参考特定的SSB或CSI-RS(Channel State Information-Reference Signal，信道状态信息-参考信号)，即终端设备使用PDCCH的激活TCI(Transmission Configuration Indicator，传输配置指示)状态去接收PDCCH。然而，目前情况下，终端设备无法基于切换命令确定出使用哪些TCI状态去接收PDCCH，进而可能使得终端设备在切换后无法获得可用的上行资源，无法发送切换完成消息，造成切换失败。
下面，将通过几个示例性实施例对本申请技术方案进行介绍说明。
请参考图6，其示出本申请一个实施例提供的PDCCH监听方法的流程图。该方法可应用于图1所示 的网络架构中。该方法可以包括如下几个步骤(610～620)：
步骤610，第一网络设备向终端设备发送切换命令，切换命令用于指示终端设备从第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区。
相应地，终端设备接收第一网络设备发送的切换命令。
终端设备可以是任意一个终端设备，例如在本申请中终端设备可以作为NR系统中任意一个可以监听PDCCH的设备。当然，本申请技术方案并不局限于应用在NR系统，还可应用在LTE系统，或者其他后续演进的通信系统中。
第一网络设备是与终端设备建立连接的网络设备。第一网络设备也称为源网络设备或源基站。第一小区是以第一网络设备为中心，信号覆盖的一片区域基于载频、扰码等信息划分出的物理区域，终端设备在该第一小区内与第一网络设备建立连接。第一网络设备可以有至少一个小区，第一小区可以是上述至少一个小区中的一个，第一小区也称为源小区或服务小区。
第二网络设备是终端设备执行切换过程后即将建立连接的网络设备，也称为目标网络设备或目标基站。第二小区是以第二网络设备为中心，信号覆盖的一片区域基于载频、扰码等信息划分出的物理区域。第二网络设备可以有至少一个小区，第二小区可以是上述至少一个小区中的一个，第二小区也称为目标小区。
可选地，第一网络设备与第二网络设备是两个不同的网络设备，或者第一网络设备与第二网络设备也可以是同一个网络设备。例如在第一小区与第二小区属于同一网络设备的情况下，第一网络设备与第二网络设备是同一个网络设备。
在本实施例中，针对不同的环境，终端设备从第一网络设备的第一小区切换到第二网络设备的第二小区的原因包括但不限于：第一小区服务信号质量过低、第一网络设备发生故障等，本申请对此不作限定。
可选地，切换命令为RACH-less切换命令，RACH-less切换命令用于指示终端设备执行RACH-less切换过程。
可选地，第一网络设备向终端设备发送RRC消息，终端设备接收第一网络设备发送的RRC消息，该RRC消息中包括用于指示终端设备执行RACH-less切换过程的信息。可选地，上述RRC消息为RRC重配置消息，其中包含有ReconfigurationWithSync，代表切换命令。该切换命令可以由第二网络设备生成，由第一网络设备转发。
可选地，上述用于指示终端设备执行RACH-less切换过程的信息可以是RACH-less切换标识或RACH-skip信息。终端设备根据该RACH-less切换标识或RACH-skip信息，即可获知执行RACH-less切换过程。
步骤620，终端设备基于第二小区的目标BWP相关联的CORESET，监听第二网络设备发送的PDCCH。
终端设备在接收到切换命令后，根据该切换命令确定第二小区的目标BWP相关联的CORESET。可选地，第二小区的目标BWP可以是初始BWP或激活BWP或其他状态的BWP。可选地，终端设备使用目标BWP相关联的CORESET所对应的TCI状态监听第二网络设备发送的PDCCH。
在示例性实施例中，第一网络设备发送由第二网络设备生成的切换命令，终端设备接收第一网络设备发送的切换命令，终端设备基于切换命令确定目标BWP及其相关联的CORESET和/或其他信息，并通过这些信息确定目标接收波束，终端设备使用确定出的目标接收波束监听第二网络设备发送的PDCCH。
可选地，如果终端设备监听到使用自身的C-RNTI加扰的PDCCH，从中获取上行授权(UL grant)信息，基于该上行授权信息确定出相应的上行资源，并在该确定出的上行资源上向第二网络设备发送切换完成消息。可选地，在切换命令使用RRC重配置消息发送的情况下，该切换完成消息可以是RRC重配置完成消息。
综上所述，本申请实施例提供的技术方案，通过终端设备在接收到切换命令之后，基于目标小区的目标BWP相关联的CORESET，监听目标小区发送的PDCCH，使得终端设备能够准确地监听PDCCH，从而从PDCCH中获得可用的上行资源来发送切换完成消息，提升切换成功率。
请参考图7，其示出本申请另一个实施例提供的PDCCH监听方法的流程图。该方法可应用于图1所示的网络架构中。该方法可以包括如下几个步骤(710～720)：
步骤710，第一网络设备向终端设备发送切换命令，切换命令用于指示终端设备从第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区。
相应地，终端设备接收第一网络设备发送的切换命令。
可选地，切换命令以RRC消息的形式发送，第一网络设备向终端设备发送RRC消息(如RRC重配置消息)，该RRC消息中包含有切换命令(如ReconfigurationWithSync)。
可选地，切换命令中还包括用于指示终端设备执行RACH-less切换过程的信息，如RACH-less切换标识或RACH-skip信息。
可选地，切换命令中还包括第二小区的激活BWP(active BWP)的配置信息，其中，激活BWP的配置信息用于指示激活BWP、激活BWP相关联的至少一个CORESET，以及至少一个CORESET中每个CORESET对应配置的一组TCI状态等信息。
可选地，切换命令中还包括第二小区的初始BWP(initial BWP)的配置信息，其中，初始BWP的配置信息用于指示初始BWP、初始BWP相关联的CORESET等信息。
步骤720，终端设备基于第二小区的初始BWP相关联的CORESET，监听第二网络设备发送的PDCCH。
在本实施例中，目标BWP为第二小区的初始BWP。可选地，初始BWP相关联的CORESET记为CORESET#0。可选地，终端设备根据切换命令确定第二小区的初始BWP。
可选地，在切换命令中包含第二小区的初始BWP的配置信息的情况下，终端设备根据第二小区的初始BWP的配置信息，确定第二小区的初始BWP。
可选地，在切换命令中不包含第二小区的初始BWP的配置信息的情况下，终端设备将第一小区的初始BWP确定为第二小区的初始BWP。
可选地，第二小区的初始BWP相关联的CORESET等配置信息遵循增量(Delta)配置原则，即对于第二小区更新的配置信息，第二小区使用信令进行配置；对于第二小区未更新的配置信息(第一小区与第二小区相同的配置信息)则不使用信令进行配置。第一网络设备向第二网络设备发送切换请求，第二网络设备接收切换请求，并基于切换请求确定第一网络设备的第一小区的配置信息(如第一小区的初始BWP相关联的CORESET等)，第二网络设备将第二小区的配置信息与上述确定的第一小区的配置信息进行比较，若存在不同的配置信息，则针对不同的配置信息通过信令进行配置，若不存在不相同的配置信息，则可不必使用信令进行配置。终端设备基于切换命令确定第二小区的BWP相关联的CORESET等配置信息，若终端设备未接收到的第二小区的部分配置信息，则使用第一小区的相关配置信息。终端设备若接收到第二小区更新的配置信息，则根据信令将相应的配置信息更新。通过增量配置原则可以减少信令消耗并且保证终端设备能确定出初始BWP相关联的CORESET等信息。
另外，由于初始BWP相关联的CORESET没有对应的TCI状态集合，因此在一个示例中，在确定基于第二小区的初始BWP相关联的CORESET监听PDCCH的情况下，终端设备使用波束扫描方式，在终端设备的所有接收波束上接收第二网络设备发送的PDCCH。上述接收波束也称为SSB波束，是指接收SSB所使用的波束。
由于初始BWP与其相关联的CORESET的带宽比较小，同时网络中低频段和中频段带宽有限，因此，在终端设备使用所有接收波束监听第二网络设备发送的PDCCH时，可能会在网络调度方面存在一些限制。在另一示例性实施例中，在确定基于第二小区的初始BWP相关联的CORESET监听PDCCH的情况下，终端设备根据波束测量结果，从终端设备的所有接收波束中确定至少一个目标接收波束，使用目标接收波束接收第二网络设备发送的PDCCH。
终端设备通过波束扫描、测量过程获得波束测量结果，终端设备通过波束测量结果选择一个或多个目标接收波束，并使用选择的目标接收波束监听第二网络设备发送的PDCCH。
终端设备可以通过一些选择标准在波束测量结果中确定用于监听第二网络设备发送的PDCCH的目标接收波束。可选地，终端设备通过波束测量结果选择目标接收波束的标准是选择信号质量最好的前n个波束作为目标接收波束，其中n为正整数。可选地，终端设备通过波束测量结果选择目标接收波束的标准是设定一个信号质量阈值X，终端设备将波束测量结果中所有信号质量超出X的波束确定为目标接收波束。另外，有关波束扫描、波束测量的具体过程请参考上文介绍说明，此处不再赘述。
在一个实施例中，第一网络设备转发第二网络设备生成的切换命令，终端设备接收切换命令并基于切换命令确定第二小区初始BWP相关联的CORESET，终端设备根据波束测量结果选择一个信号质量最好的接收波束作为目标接收波束，终端设备使用该目标接收波束监听第二网络设备发送的PDCCH。
在另一个实施例中，第一网络设备转发第二网络设备生成的切换命令，终端设备接收切换命令并基于切换命令确定第二小区初始BWP相关联的CORESET，终端设备根据波束测量结果选择若干个信号质量高于一定门限的波束作为目标接收波束，终端设备使用这些目标接收波束监听第二网络设备发送的PDCCH。
综上所述，本实施例提供的技术方案，终端设备基于目标小区的初始BWP相关联的CORESET来监听PDCCH，这样可以减少针对RRC消息的修改。
另外，终端设备通过波束测量结果确定目标接收波束并使用确定的目标接收波束监听第二网络设备发送的PDCCH，相比于终端设备使用所有接收波束监听PDCCH，有助于降低了终端设备监听过程的能耗，达到终端省电的目的。
上文实施例介绍了终端设备基于第二小区的初始BWP相关联的CORESET，监听第二网络设备发送的PDCCH，在一些其他实施例中，终端设备基于第二小区的激活BWP相关联的CORESET，监听第二网络设备发送的PDCCH。下面，结合图8和图9两个实施例对此进行介绍说明。
请参考图8，其示出本申请另一个实施例提供给的PDCCH监听方法的流程图。该方法可应用于图1所示的网络架构中，该方法可以包括如下几个步骤(810～820)：
步骤810，第一网络设备向终端设备发送切换命令，切换命令用于指示终端设备从第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区。
相应地，终端设备接收第一网络设备发送的切换命令。
可选地，切换命令以RRC消息的形式发送，第一网络设备向终端设备发送RRC消息(如RRC重配置消息)，该RRC消息中包含有切换命令(如ReconfigurationWithSync)。
可选地，切换命令中还包括用于指示终端设备执行RACH-less切换过程的信息，如RACH-less切换标识或RACH-skip信息。
可选地，切换命令中还包括第二小区的激活BWP(active BWP)的配置信息，其中，激活BWP的配置信息用于指示激活BWP、激活BWP相关联的至少一个CORESET，以及至少一个CORESET中每个CORESET对应配置的一组TCI状态等信息。
可选地，切换命令中还包括第二小区的初始BWP(initial BWP)的配置信息，其中，初始BWP的配置信息用于指示初始BWP、初始BWP相关联的CORESET等信息。
步骤820，终端设备使用第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听第二网络设备发送的PDCCH。
在本实施例中，目标BWP为第二小区的激活BWP。可选地，终端设备基于切换命令确定第二小区的激活BWP。例如，终端设备基于切换命令中包含的第二小区的激活BWP的配置信息，确定激活BWP、该激活BWP相关联的至少一个CORESET，以及该至少一个CORESET中每个CORESET对应配置的一组TCI状态等信息。
在一个示例中，终端设备使用上述配置的TCI状态集合监听PDCCH的行为是由协议约定的。例如，如果切换命令中包含第二小区的激活BWP的配置信息，则终端设备使用配置的TCI状态集合监听PDCCH。反之，如果切换命令中未包含第二小区的激活BWP的配置信息，则终端设备也就无法使用配置的TCI状态集合监听PDCCH。
在另一个示例中，终端设备使用上述配置的TCI状态集合监听PDCCH的行为是由网络配置的。可选地，切换命令中还包括第一信息，第一信息用于指示终端设备使用或不使用配置的TCI状态集合监听PDCCH。若切换命令中的第一信息指示终端设备使用配置的TCI状态集合监听PDCCH，则终端设备使用配置的TCI状态集合监听PDCCH。若切换命令中的第一信息指示终端设备不使用配置的TCI状态集合监听PDCCH，则终端设备不使用配置的TCI状态集合监听PDCCH。上述第一信息可以用1比特来表示，例如1代表使用，0代表不使用，或者1代表不使用，0代表使用。
另外，由于第二小区的激活BWP相关联的CORESET的数量可以是一个或多个。在激活BWP相关联的CORESET的数量为一个的情况下，终端设备即使用这一个CORESET对应配置的TCI状态集合监听第二网络设备发送的PDCCH。在激活BWP相关联的CORESET的数量为多个(如记为n个，n为大于1的整数)的情况下，终端设备可以使用全部该n个CORESET对应配置的TCI状态集合监听第二网络设备发送的PDCCH，也可以使用该n个CORESET中的部分CORESET对应配置的TCI状态集合监听第二网络设备发送的PDCCH。如果终端设备使用该n个CORESET中的部分CORESET对应配置的TCI状态集合监听第二网络设备发送的PDCCH，从n个CORESET中确定部分CORESET的方式可以取决于终端设备实现，也可以由网络设备指示，例如在切换命令中包括该部分CORESET对应的指示信息。
可选地，为了辅助第二小区配置合适的TCI状态集合，终端设备可以在向第一小区发送的测量报告中携带第二小区的波束测量结果，第一小区在切换请求时可以将这些波束测量结果转发给第二小区，这样就可以辅助第二小区配置合适的TCI状态集合，例如选择波束测量结果较好的几个波束作为配置的TCI状态。
综上所述，本实施例提供的技术方案，终端设备使用目标小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听目标小区发送的PDCCH，可以避免终端设备在所有接收波束上监听PDCCH，达到终端设备省电的目的。
另外，本实施例方案相当于切换命令中配置的TCI状态配置即激活，因此如果网络设备后续想使用其他的TCI状态，则需要再通过RRC重配置消息增加。
请参考图9，其示出本申请另一个实施例提供给的PDCCH监听方法的流程图。该方法可应用于图1所示的网络架构中，该方法可以包括如下几个步骤(910～920)：
步骤910，第一网络设备向终端设备发送切换命令，切换命令用于指示终端设备从第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区。
相应地，终端设备接收第一网络设备发送的切换命令。
可选地，切换命令以RRC消息的形式发送，第一网络设备向终端设备发送RRC消息(如RRC重配 置消息)，该RRC消息中包含有切换命令(如ReconfigurationWithSync)。
可选地，切换命令中还包括用于指示终端设备执行RACH-less切换过程的信息，如RACH-less切换标识或RACH-skip信息。
可选地，切换命令中还包括第二小区的激活BWP(active BWP)的配置信息，其中，激活BWP的配置信息用于指示激活BWP、激活BWP相关联的至少一个CORESET，以及至少一个CORESET中每个CORESET对应配置的一组TCI状态等信息。
可选地，切换命令中还包括第二小区的初始BWP(initial BWP)的配置信息，其中，初始BWP的配置信息用于指示初始BWP、初始BWP相关联的CORESET等信息。
步骤920，终端设备使用第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听第二网络设备发送的PDCCH。
可选地，切换命令中还包括第二信息，第二信息用于指示激活的至少一个TCI状态。
可选地，第二信息包括比特序列，比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。例如，比特序列A 1包含4个比特，其中，比特位数值为0表示对应的是未激活TCI状态，比特位数值为1表示对应的是激活的TCI状态，如果A 1序列的内容为(0，0，0，1)，则比特序列A 1中索引为3的TCI状态为激活状态。再例如，例如比特序列A 2包含5个比特，其中，比特位数值为0表示对应的是激活TCI状态，比特位数值为1表示对应的是为激活TCI状态，如果A 2序列的内容为(1，0，1，1，1)，则比特序列A 2中索引为1的TCI状态为激活状态。上述示例中，索引从0开始依次往下编号。
可选地，每个CORESET具有独立对应的第二信息，或者，存在至少两个CORESET共用同一个第二信息。
在一个示例性实施例中，假设第二小区的激活BWP关联2个CORESET(记为CORESET#1和CORESET#2)，这2个CORESET共用同一个第二信息，以第二信息为比特序列为例，假设第二信息为(1，0，0，0)，其中1表示激活，0表示未激活，则表示激活CORESET#1对应的TCI状态集合中的第1个TCI状态，以及激活CORESET#2对应的TCI状态集合中的第1个TCI状态，终端设备使用这2个激活的TCI状态监听第二网络设备发送的PDCCH。
在另一个示例性实施例中，假设第二小区的激活BWP关联2个CORESET(记为CORESET#1和CORESET#2)，这2个CORESET具有独立对应的第二信息，以第二信息为比特序列为例，假设CORESET#1对应的第二信息为(1，0，0，0)，CORESET#2对应的第二信息为(0，1，0，1)，其中1表示激活，0表示未激活，则表示激活CORESET#1对应的TCI状态集合中的第1个TCI状态，以及激活CORESET#2对应的TCI状态集合中的第2个和第4个TCI状态，终端设备使用上述3个激活的TCI状态监听第二网络设备发送的PDCCH。
上述示例性实施例中对于比特序列的描述仅为举例的目的，不能代表对比特序列格式做出了限定。
可选地，为了辅助第二小区激活合适的TCI状态集合，终端设备可以在向第一小区发送的测量报告中携带第二小区的波束测量结果，第一小区在切换请求时可以将这些波束测量结果转发给第二小区，这样就可以辅助第二小区激活合适的TCI状态集合，例如选择波束测量结果较好的几个波束作为激活的TCI状态。
综上所述，本实施例提供的技术方案，终端设备使用目标小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听目标网络设备发送的PDCCH，可以避免终端设备在所有接收波束上监听PDCCH，达到终端设备省电的目的。
另外，本实施例方案相比图8实施例方案有一个好处是TCI状态可以一次性配置下来，后续网络设备想激活其他的TCI状态可以通过MAC CE来激活，无需再通过RRC重配置消息增加相应的TCI状态。
请参考图10，其示出本申请另一个实施例提供给的PDCCH监听方法的流程图。该方法可应用于图1所示的网络架构中，该方法可以包括如下几个步骤(1010～1020)：
步骤1010，第二网络设备向第一网络设备发送切换命令，切换命令用于指示终端设备从第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区。
步骤1020，第二网络设备在目标BWP发送PDCCH，其中，终端设备基于目标BWP相关联的CORESET监听PDCCH。
在一个示例中，目标BWP为第二小区的初始BWP。有关终端设备基于第二小区的初始BWP相关联的CORESET监听PDCCH的介绍说明，可参见上文实施例，此处不再赘述。
在另一个示例中，目标BWP为第二小区的激活BWP。有关终端设备基于第二小区的激活BWP相关联的CORESET监听PDCCH的介绍说明，可参见上文实施例，此处不再赘述。
在示例性实施例中，目标BWP可以由第二网络设备确定。也即，由第二网络设备确定目标BWP是初始BWP还是激活BWP。
可选地，第二网络设备根据参考信息确定目标BWP为第二小区的初始BWP或第二小区的激活BWP； 其中，参考信息包括以下至少一项：业务需求、BWP负载、终端类型。
第二网络设备可以根据业务需求确定目标BWP，由于初始BWP所对应的带宽较小，能承载的业务量较小，因此，在业务需求小的情况下，第二网络设备将初始BWP确定为目标BWP；反之，在业务需求大的情况下，第二网络设备将激活BWP确定为目标BWP。
BWP负载在一定程度上可以通过使用BWP的终端设备的数量来衡量。可选地，第二网络设备通过比较初始BWP的负载与激活BWP的负载，将负载小的BWP确定为目标BWP。例如，使用初始BWP的终端设备数为3，使用激活BWP的终端设备数为30，此时，初始BWP的负载较小，第二网络设备将初始BWP确定为目标BWP。
示例性地，终端类型是根据终端设备的最大发射功率进行区分的。根据最大发射功率，终端设备可以分为第一类终端设备(也称为低功率终端设备，如RedCap终端设备)和第二类终端设备(也称为普通终端设备)，低功率终端设备的最大发射功率很小，数据传输速率慢，带宽较小的初始BWP可以满足其需求，例如，低功率终端设备的发送功率低于20dBm；普通终端设备的最大发送功率比较大，数据传输速率较快，因此需要较大的带宽进行数据传输。第二网络设备在判断终端设备为低功率终端设备的情况下，将初始BWP确定为目标BWP，反之，在判断终端设备为普通终端设备的情况下，则将激活BWP确定为目标BWP。例如，第二网络设备通过第一网络设备发送的切换请求确定终端设备的最大发送功率为15dBm，终端设备为低功率终端设备，第二网络设备将初始BWP确定为目标BWP。
可选地，切换命令中包括第三信息，第三信息用于向终端设备指示基于第二小区的初始BWP相关联的CORESET监听PDCCH，或者基于第二小区的激活BWP相关联的CORESET监听PDCCH。
第二网络设备确定目标BWP的类型后，可以在切换命令中配置第三信息指示终端设备用于监听PDCCH的目标BWP，若切换命令中的第三信息指示终端设备使用初始BWP相关联的CORESET监听PDCCH，则终端设备使用初始BWP相关联的CORESET监听PDCCH；若切换命令中的第三信息指示终端设备使用激活BWP相关联的CORESET监听PDCCH，则终端设备使用激活BWP相关联的CORESET监听PDCCH。可选地，第三信息可以用1比特来表示，如0表示第二网络设备指示终端设备使用初始BWP相关联的CORESEt监听PDCCH，1表示第二网络设备指示终端设备使用激活BWP相关联的CORESET监听PDCCH。
在一个示例性实施例中，第二小区的初始BWP上连接的终端设备数量为10，激活BWP连接的终端设备数量为2，第二网络设备确定激活BWP的负载较小，将激活BWP确定为目标BWP，并在切换命令中写入激活BWP的相关配置和第三信息，其中，第三信息为数值为1的比特字符，第三信息用于指示终端设备使用第二小区的激活BWP相关联的CORESET监听PDCCH。
可选地，在确定目标BWP为第二小区的激活BWP的情况下，在切换命令中添加第二小区的激活BWP的配置信息；或者，在确定目标BWP为第二小区的初始BWP的情况下，在切换命令中不添加第二小区的激活BWP的配置信息。
若第二网络设备确定目标BWP为第二小区的激活BWP，则第二网络设备在切换命令中配置激活BWP的相关信息，激活BWP的相关信息至少包括激活BWP相关联的CORESET对应的一个或多个TCI状态集合，除此以外，激活BWP的相关信息还可以包括上文介绍的第一信息和/或第二信息。若第二网络设备确定目标BWP为第二小区的初始BWP，则第二网络设备不在切换命令中添加第二小区的激活BWP的配置信息。可选地，在切换命令中不添加第二小区的激活BWP的配置信息的情况下，第二网络设备在切换命令中添加第二小区的初始BWP的配置信息，终端设备基于切换命令中的初始BWP的配置信息，确定第二小区的初始BWP，并使用该初始BWP相关联的CORESET监听第二网络设备发送的PDCCH。可选地，在切换命令中不添加第二小区的激活BWP的配置信息的情况下，第二网络设备也不在切换命令中添加第二小区的初始BWP的配置信息，终端设备接收切换命令后，发现切换命令中没有初始BWP也没有激活BWP的配置信息，根据增量配置原则，终端设备将第一小区的初始BWP确定为第二小区的初始BWP，并使用该初始BWP相关联的CORESET监听第二网络设备发送的PDCCH。
例如，第二网络设备通过第一网络设备发送的切换请求确定终端设备的最大发送功率为31dBm，终端设备为普通终端设备，第二网络设备将激活BWP确定为目标BWP，并在切换命令中添加第二小区的激活BWP的配置信息，终端设备通过第二小区的激活BWP相关联的CORESET监听PDCCH。
又例如，第二网络设备确定业务需求较小，将初始BWP确定为目标BWP，确定目标BWP为第二小区的初始BWP的情况下，在切换命令中不添加第二小区的激活BWP的配置信息，同时在切换命令中不添加初始BWP的配置信息。终端设备接收到切换命令后，确定切换命令中不包含激活BWP的配置信息并确定切换命令中不包含初始BWP的配置信息，终端设备将第一小区的初始BWP的配置信息作为第二小区的初始BWP信息，终端设备使用该初始BWP相关联的CORESET监听第二终端设备发送的PDCCH。
上述实施例中第一网络设备转发切换命令以及终端设备使用目标BWP的配置信息监听PDCCH的具体过程请参考终端设备侧的实施例，在此不进行赘述。
需要说明的是，上述示例性实施例中对于参考信息如业务需求、BWP负载、终端类型以及第三信息的描述仅作为举例目的，不代表对以上信息的形式和内容进行限定。
综上所述，本申请实施例提供的技术方案，通过第二网络设备生成切换命令，第一网络设备转发切换命令，终端设备在接收到切换命令之后，基于目标小区的目标BWP相关联的CORESET，监听目标小区发送的PDCCH，使得终端设备能够准确地监听PDCCH，从而从PDCCH中获得可用的上行资源来发送切换完成消息，提升切换成功率。
另外，本实施例中提供了第二网络设备通过参考信息确定目标BWP的方法，第二网络设备通过参考信息可以灵活地确定目标BWP，有助于合理利用BWP资源，同时使得终端设备能够与切换命令中的目标BWP相匹配。
需要说明的是，上文仅从终端设备、第一网络设备和第二网络设备交互的角度，对本申请技术方案进行了介绍说明，上述有关终端设备执行的步骤可以单独实现成为终端设备侧的PDCCH监听方法，上述有关第一网络设备执行的步骤可以单独实现成为第一网络设备侧的PDCCH监听方法，上述有关第二网络设备执行的步骤可以单独实现成为第二网络设备侧的PDCCH监听方法。
下述为本申请装置实施例，可以用于执行本申请方法实施例。对于本申请装置实施例中未披露的细节，请参照本申请方法实施例。
参考图11，其示出了本申请一个实施例提供的PDCCH监听装置的框图。该装置具有实现上述终端设备侧的方法示例的功能，该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的终端设备，也可以设置于在终端设备中。如图11所示，该装置1100可以包括：接收模块1110和监听模块1120。
接收模块1110，用于接收第一网络设备发送的切换命令，切换命令用于指示终端设备从第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区。
监听模块1120，用于基于第二小区的目标带宽部分BWP相关联的控制资源集CORESET，监听第二网络设备发送的PDCCH。
可选地，目标BWP为第二小区的初始BWP。
可选地，所述监听模块1120用于在确定基于第二小区的初始BWP相关联的CORESET监听PDCCH的情况下，使用波束扫描方式，在终端设备的所有接收波束上接收第二网络设备发送的PDCCH。
可选地，所述监听模块1120用于在确定基于第二小区的初始BWP相关联的CORESET监听PDCCH的情况下，根据波束测量结果，从终端设备的所有接收波束中确定至少一个目标接收波束，在目标接收波束上接收第二网络设备发送的PDCCH。
可选地，所述装置1100还包括确定模块(图11中未示出)，该确定模块用于在切换命令中包含第二小区的初始BWP的配置信息的情况下，根据第二小区的初始BWP的配置信息，确定第二小区的初始BWP；或者，在切换命令中不包含第二小区的初始BWP的配置信息的情况下，将第一小区的初始BWP确定为第二小区的初始BWP。
可选地，目标BWP为第二小区的激活BWP。
可选地，切换命令中包含第二小区的激活BWP的配置信息；其中，激活BWP的配置信息用于指示激活BWP、激活BWP相关联的至少一个CORESET，以及至少一个CORESET中每个CORESET对应配置的一组TCI状态。
可选地，所述监听模块1120用于使用所述第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听所述第二网络设备发送的PDCCH。
可选地，所述终端设备使用配置的TCI状态集合监听PDCCH的行为是由协议约定的。
可选地，如果所述切换命令中包含所述第二小区的激活BWP的配置信息，所述终端设备使用所述配置的TCI状态集合监听PDCCH。
可选地，所述终端设备使用所述配置的TCI状态集合监听PDCCH的行为是由网络配置的。
可选地，所述切换命令中还包括第一信息，所述第一信息用于指示所述终端设备使用或不使用所述配置的TCI状态集合监听PDCCH。
可选地，所述监听模块1120用于使用所述第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听所述第二网络设备发送的PDCCH。
可选地，所述切换命令中还包括第二信息，所述第二信息用于指示激活的至少一个TCI状态。
可选地，第二信息包括比特序列，比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。
可选地，每个CORESET具有独立对应的第二信息，或者，存在至少两个CORESET共用同一个第二 信息。
可选地，所述切换命令为RACH-less切换命令，所述RACH-less切换命令用于指示所述终端设备执行RACH-less切换过程。
可选地，所述接收模块1110，用于接收所述第一接入网设备发送的无线资源控制RRC消息，所述RRC消息中包括用于指示所述终端设备执行RACH-less切换过程的信息。
可选地，所述切换命令中包括第三信息，所述第三信息用于向所述终端设备指示基于所述第二小区的初始BWP相关联的CORESET监听所述PDCCH，或者基于所述第二小区的激活BWP相关联的CORESET监听所述PDCCH。
可选地，在所述切换命令中包含所述第二小区的激活BWP的配置信息的情况下，所述终端设备基于所述第二小区的激活BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH；
或者，在所述切换命令中未包含所述第二小区的激活BWP的配置信息的情况下，所述终端设备基于所述第二小区的初始BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH。
可选地，所述第二网络设备根据参考信息确定所述目标BWP为所述第二小区的初始BWP或所述第二小区的激活BWP；其中，所述参考信息包括以下至少一项：业务需求、BWP负载、终端类型。
综上所述，本实施例提供的技术方案，通过终端设备在接收到切换命令之后，基于目标小区的目标BWP相关联的CORESET，监听目标小区发送的PDCCH，使得终端设备能够准确地监听PDCCH，从而从PDCCH中获得可用的上行资源来发送切换完成消息，提升切换成功率。
参考图12，其示出了本申请另一个实施例提供的PDCCH监听装置的框图。该装置具有实现上述第一网络设备侧的方法示例的功能，该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的第一网络设备，也可以设置于在第一网络设备中。如图12所示，该装置1200可以包括：发送模块1210。
发送模块1210，用于向终端设备发送切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
其中，所述终端设备基于所述第二小区的目标带宽部分BWP相关联的控制资源集CORESET，监听所述第二网络设备发送的PDCCH。
可选地，目标BWP为第二小区的初始BWP。
可选地，终端设备使用波束扫描方式，在终端设备的所有接收波束上接收第二网络设备发送的PDCCH。
可选地，终端设备根据波束测量结果，从终端设备的所有接收波束中确定至少一个目标接收波束，在目标接收波束上接收第二网络设备发送的PDCCH。
可选地，在切换命令中包含第二小区的初始BWP的配置信息的情况下，终端设备根据第二小区的初始BWP的配置信息，确定第二小区的初始BWP；或者，在切换命令中不包含第二小区的初始BWP的配置信息的情况下，终端设备将第一小区的初始BWP确定为第二小区的初始BWP。
可选地，目标BWP为第二小区的激活BWP。
可选地，切换命令中包含第二小区的激活BWP的配置信息；其中，激活BWP的配置信息用于指示激活BWP、激活BWP相关联的至少一个CORESET，以及至少一个CORESET中每个CORESET对应配置的一组传输配置指示TCI状态。
可选地，终端设备使用第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听第二网络设备发送的PDCCH。
可选地，终端设备使用配置的TCI状态集合监听PDCCH的行为是由协议约定的。
可选地，如果切换命令中包含第二小区的激活BWP的配置信息，终端设备使用配置的TCI状态集合监听PDCCH。
可选地，终端设备使用配置的TCI状态集合监听PDCCH的行为是由网络配置的。
可选地，切换命令中还包括第一信息，第一信息用于指示终端设备使用或不使用配置的TCI状态集合监听PDCCH。
可选地，终端设备使用第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听第二网络设备发送的PDCCH。
可选地，切换命令中还包括第二信息，第二信息用于指示激活的至少一个TCI状态。
可选地，第二信息包括比特序列，比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。
可选地，每个CORESET具有独立对应的第二信息，或者，存在至少两个CORESET共用同一个第二信息。
可选地，切换命令为RACH-less切换命令，RACH-less切换命令用于指示终端设备执行RACH-less切换过程。
可选地，所述发送模块1210用于向终端设备发送无线资源控制RRC消息，RRC消息中包括用于指示终端设备执行RACH-less切换过程的信息。
综上所述，本申请实施例提供的技术方案，通过终端设备在接收到切换命令之后，基于目标小区的目标BWP相关联的CORESET，监听目标小区发送的PDCCH，使得终端设备能够准确地监听PDCCH，从而从PDCCH中获得可用的上行资源来发送切换完成消息，提升切换成功率。
参考图13，其示出了本申请另一个实施例提供的PDCCH监听装置的框图。该装置具有实现上述第二网络设备侧的方法示例的功能，该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的第二网络设备，也可以设置于在第二网络设备中。如图13所示，该装置1300可以包括：发送模块1310。
发送模块1310，用于向第一网络设备发送切换命令，所述切换命令用于指示终端设备从所述第一网络设备对应的第一小区，切换至所述第二网络设备对应的第二小区；
发送模块1310，还用于在目标带宽部分BWP发送PDCCH，其中，所述终端设备基于所述目标BWP相关联的控制资源集CORESET监听所述PDCCH。
可选地，所述目标BWP为所述第二小区的初始BWP。
可选地，所述切换命令中包含所述第二小区的激活BWP的配置信息；其中，所述激活BWP的配置信息用于指示所述激活BWP、所述激活BWP相关联的至少一个CORESET，以及所述至少一个CORESET中每个CORESET对应配置的一组传输配置指示TCI状态。
可选地，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听所述第二网络设备发送的PDCCH。
可选地，如果所述切换命令中包含所述第二小区的激活BWP的配置信息，所述终端设备使用所述配置的TCI状态集合监听PDCCH。
可选地，所述切换命令中还包括第一信息，所述第一信息用于指示所述终端设备使用或不使用所述配置的TCI状态集合监听PDCCH。
可选地，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听所述第二网络设备发送的PDCCH。
可选地，所述切换命令中还包括第二信息，所述第二信息用于指示所述激活的至少一个TCI状态。
可选地，所述第二信息包括比特序列，所述比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。
可选地，每个CORESET具有独立对应的所述第二信息；
或者，
存在至少两个CORESET共用同一个所述第二信息。
可选地，所述切换命令为RACH-less切换命令，所述RACH-less切换命令用于指示所述终端设备执行RACH-less切换过程。
可选地，所述装置还包括确定模块(图13中未示出)用于：
根据参考信息确定所述目标BWP为所述第二小区的初始BWP或所述第二小区的激活BWP；其中，所述参考信息包括以下至少一项：业务需求、BWP负载、终端类型。
可选地，所述切换命令中包括第三信息，所述第三信息用于向所述终端设备指示基于所述第二小区的初始BWP相关联的CORESET监听所述PDCCH，或者基于所述第二小区的激活BWP相关联的CORESET监听所述PDCCH。
可选地，所述装置还包括添加模块(图13中未示出)，用于：
在确定所述目标BWP为所述第二小区的激活BWP的情况下，在所述切换命令中添加所述第二小区的激活BWP的配置信息；
或者，
在确定所述目标BWP为所述第二小区的初始BWP的情况下，在所述切换命令中不添加所述第二小区的激活BWP的配置信息。
综上所述，本申请实施例提供的技术方案，通过终端设备在接收到切换命令之后，基于目标小区的目标BWP相关联的CORESET，监听目标小区发送的PDCCH，使得终端设备能够准确地监听PDCCH，从而从PDCCH中获得可用的上行资源来发送切换完成消息，提升切换成功率。
需要说明的一点是，上述实施例提供的装置在实现其功能时，仅以上述各个功能模块的划分进行举例 说明，实际应用中，可以根据实际需要而将上述功能分配由不同的功能模块完成，即将设备的内容结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
请参考图14，其示出了本申请一个实施例提供的终端设备140的结构框图。例如，该终端设备140可用于执行上述终端设备侧的PDCCH监听方法。具体来讲：该终端设备140可以包括：处理器141、接收器142、发射器143、存储器144和总线145。
处理器141包括一个或者一个以上处理核心，处理器141通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器142和发射器143可以实现为一个收发器146，该收发器146可以是一块通信芯片。
存储器144通过总线145与处理器141相连。
存储器144可用于存储计算机程序，处理器141用于执行该计算机程序，以实现上述方法实施例中终端设备执行的各个步骤。
此外，存储器144可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：RAM(Random-Access Memory，随机存储器)和ROM(Read-Only Memory，只读存储器)、EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、EEPROM(Electrically Erasable Programmable Read-Only Memory，电可擦写可编程只读存储器)、闪存或其他固态存储其技术，CD-ROM(Compact Disc Read-Only Memory，只读光盘)、DVD(Digital Video Disc，高密度数字视频光盘)或其他光学存储、磁带盒、磁带、磁盘存储或其他磁性存储设备。
可选地，所述收发器146，用于接收第一网络设备发送的切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区。
所述收发器146，还用于基于所述第二小区的目标BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH。
对于上述实施例中未详细说明的细节，可参见上文方法实施例中的介绍说明，此处不再赘述。
请参考图15，其示出了本申请一个实施例提供的网络设备150的结构框图。例如，该网络设备150可用于执行上述第一网络设备侧或第二网络设备侧的PDCCH监听方法。具体来讲：该网络设备150可以包括：处理器151、接收器152、发射器153、存储器154和总线155。
处理器151包括一个或者一个以上处理核心，处理器151通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器152和发射器153可以实现为一个收发器156，该收发器156可以是一块通信芯片。
存储器154通过总线155与处理器151相连。
存储器154可用于存储计算机程序，处理器151用于执行该计算机程序，以实现上述方法实施例中第一网络设备或第二网络设备执行的各个步骤。
此外，存储器154可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：RAM(Random-Access Memory，随机存储器)和ROM(Read-Only Memory，只读存储器)、EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、EEPROM(Electrically Erasable Programmable Read-Only Memory，电可擦写可编程只读存储器)、闪存或其他固态存储其技术，CD-ROM(Compact Disc Read-Only Memory，只读光盘)、DVD(Digital Video Disc，高密度数字视频光盘)或其他光学存储、磁带盒、磁带、磁盘存储或其他磁性存储设备。
在示例性实施例中，在所述网络设备150为第一网络设备的情况下，所述收发器156，用于向终端设备发送切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
其中，所述终端设备基于所述第二小区的目标BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH。
在示例性实施例中，在所述网络设备150为第二网络设备的情况下，所述收发器156，用于发送切换命令，所述切换命令用于指示终端设备从所述第一网络设备对应的第一小区，切换至所述第二网络设备对应的第二小区；
所述收发器156，还用于在目标带宽部分BWP发送PDCCH，其中，所述终端设备基于所述目标BWP相关联的控制资源集CORESET监听所述PDCCH。
可选地，所述处理器151用于根据参考信息确定所述目标BWP为所述第二小区的初始BWP或所述第二小区的激活BWP；其中，所述参考信息包括以下至少一项：业务需求、BWP负载、终端类型。
对于上述实施例中未详细说明的细节，可参见上文方法实施例中的介绍说明，此处不再赘述。
本申请实施例还提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被设备的处理器执行，以实现上述PDCCH监听方法。
可选地，该计算机可读存储介质可以包括：ROM(Read-Only Memory，只读存储器)、RAM(Random-Access Memory，随机存储器)、SSD(Solid State Drives，固态硬盘)或光盘等。其中，随机存取记忆体可以包括ReRAM(Resistance Random Access Memory，电阻式随机存取记忆体)和DRAM(Dynamic Random Access Memory，动态随机存取存储器)。
本申请实施例还提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在设备上运行时，用于实现上述PDCCH监听方法。
本申请实施例还提供了一种计算机程序产品或计算机程序，所述计算机程序产品或计算机程序包括计算机指令，所述计算机指令存储在计算机可读存储介质中，设备的处理器从所述计算机可读存储介质读取并执行所述计算机指令，以实现上述PDCCH监听方法。
应理解，在本申请的实施例中提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例的描述中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
在本文中提及的“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
另外，本文中描述的步骤编号，仅示例性示出了步骤间的一种可能的执行先后顺序，在一些其它实施例中，上述步骤也可以不按照编号顺序来执行，如两个不同编号的步骤同时执行，或者两个不同编号的步骤按照与图示相反的顺序执行，本申请实施例对此不作限定。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述仅为本申请的示例性实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (99)

  1. 一种物理下行控制信道PDCCH监听方法，其特征在于，所述方法由终端设备执行，所述方法包括：
    接收第一网络设备发送的切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
    基于所述第二小区的目标带宽部分BWP相关联的控制资源集CORESET，监听所述第二网络设备发送的PDCCH。
  2. 根据权利要求1所述的方法，其特征在于，所述目标BWP为所述第二小区的初始BWP。
  3. 根据权利要求2所述的方法，其特征在于，所述基于所述第二小区的目标BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH，包括：
    在确定基于所述第二小区的初始BWP相关联的CORESET监听PDCCH的情况下，使用波束扫描方式，在所述终端设备的所有接收波束上接收所述第二网络设备发送的PDCCH。
  4. 根据权利要求2所述的方法，其特征在于，所述基于所述第二小区的目标BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH，包括：
    在确定基于所述第二小区的初始BWP相关联的CORESET监听PDCCH的情况下，根据波束测量结果，从所述终端设备的所有接收波束中确定至少一个目标接收波束；
    在所述目标接收波束上接收所述第二网络设备发送的PDCCH。
  5. 根据权利要求2至4任一项所述的方法，其特征在于，所述方法还包括：
    在所述切换命令中包含所述第二小区的初始BWP的配置信息的情况下，根据所述第二小区的初始BWP的配置信息，确定所述第二小区的初始BWP；
    或者，
    在所述切换命令中不包含所述第二小区的初始BWP的配置信息的情况下，将所述第一小区的初始BWP确定为所述第二小区的初始BWP。
  6. 根据权利要求1所述的方法，其特征在于，所述目标BWP为所述第二小区的激活BWP。
  7. 根据权利要求6所述的方法，其特征在于，所述切换命令中包含所述第二小区的激活BWP的配置信息；其中，所述激活BWP的配置信息用于指示所述激活BWP、所述激活BWP相关联的至少一个CORESET，以及所述至少一个CORESET中每个CORESET对应配置的一组传输配置指示TCI状态。
  8. 根据权利要求6或7所述的方法，其特征在于，所述基于所述第二小区的目标BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH，包括：
    使用所述第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听所述第二网络设备发送的PDCCH。
  9. 根据权利要求8所述的方法，其特征在于，如果所述切换命令中包含所述第二小区的激活BWP的配置信息，所述终端设备使用所述配置的TCI状态集合监听PDCCH。
  10. 根据权利要求8所述的方法，其特征在于，所述切换命令中还包括第一信息，所述第一信息用于指示所述终端设备使用或不使用所述配置的TCI状态集合监听PDCCH。
  11. 根据权利要求6或7所述的方法，其特征在于，所述基于所述第二小区的目标BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH，包括：
    使用所述第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听所述第二网络设备发送的PDCCH。
  12. 根据权利要求11所述的方法，其特征在于，所述切换命令中还包括第二信息，所述第二信息用于指示所述激活的至少一个TCI状态。
  13. 根据权利要求12所述的方法，其特征在于，所述第二信息包括比特序列，所述比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。
  14. 根据权利要求12或13所述的方法，其特征在于，
    每个CORESET具有独立对应的所述第二信息；
    或者，
    存在至少两个CORESET共用同一个所述第二信息。
  15. 根据权利要求1至14任一项所述的方法，其特征在于，所述切换命令为RACH-less切换命令，所述RACH-less切换命令用于指示所述终端设备执行RACH-less切换过程。
  16. 根据权利要求15所述的方法，其特征在于，所述接收第一网络设备发送的切换命令，包括：
    接收所述第一接入网设备发送的无线资源控制RRC消息，所述RRC消息中包括用于指示所述终端设 备执行RACH-less切换过程的信息。
  17. 根据权利要求1至16任一项所述的方法，其特征在于，所述切换命令中包括第三信息，所述第三信息用于向所述终端设备指示基于所述第二小区的初始BWP相关联的CORESET监听所述PDCCH，或者基于所述第二小区的激活BWP相关联的CORESET监听所述PDCCH。
  18. 根据权利要求1至16任一项所述的方法，其特征在于，
    在所述切换命令中包含所述第二小区的激活BWP的配置信息的情况下，所述终端设备基于所述第二小区的激活BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH；
    或者，
    在所述切换命令中未包含所述第二小区的激活BWP的配置信息的情况下，所述终端设备基于所述第二小区的初始BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH。
  19. 根据权利要求1至18任一项所述的方法，其特征在于，所述第二网络设备根据参考信息确定所述目标BWP为所述第二小区的初始BWP或所述第二小区的激活BWP；其中，所述参考信息包括以下至少一项：业务需求、BWP负载、终端类型。
  20. 一种物理下行控制信道PDCCH监听方法，其特征在于，所述方法由第一网络设备执行，所述方法包括：
    向终端设备发送切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
    其中，所述终端设备基于所述第二小区的目标带宽部分BWP相关联的控制资源集CORESET，监听所述第二网络设备发送的PDCCH。
  21. 根据权利要求20所述的方法，其特征在于，所述目标BWP为所述第二小区的初始BWP。
  22. 根据权利要求20所述的方法，其特征在于，所述目标BWP为所述第二小区的激活BWP。
  23. 根据权利要求22所述的方法，其特征在于，所述切换命令中包含所述第二小区的激活BWP的配置信息；其中，所述激活BWP的配置信息用于指示所述激活BWP、所述激活BWP相关联的至少一个CORESET，以及所述至少一个CORESET中每个CORESET对应配置的一组传输配置指示TCI状态。
  24. 根据权利要求22或23所述的方法，其特征在于，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听所述第二网络设备发送的PDCCH。
  25. 根据权利要求24所述的方法，其特征在于，如果所述切换命令中包含所述第二小区的激活BWP的配置信息，所述终端设备使用所述配置的TCI状态集合监听PDCCH。
  26. 根据权利要求24所述的方法，其特征在于，所述切换命令中还包括第一信息，所述第一信息用于指示所述终端设备使用或不使用所述配置的TCI状态集合监听PDCCH。
  27. 根据权利要求22或23所述的方法，其特征在于，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听所述第二网络设备发送的PDCCH。
  28. 根据权利要求27所述的方法，其特征在于，所述切换命令中还包括第二信息，所述第二信息用于指示所述激活的至少一个TCI状态。
  29. 根据权利要求28所述的方法，其特征在于，所述第二信息包括比特序列，所述比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。
  30. 根据权利要求28或29所述的方法，其特征在于，
    每个CORESET具有独立对应的所述第二信息；
    或者，
    存在至少两个CORESET共用同一个所述第二信息。
  31. 根据权利要求20至30任一项所述的方法，其特征在于，所述切换命令为RACH-less切换命令，所述RACH-less切换命令用于指示所述终端设备执行RACH-less切换过程。
  32. 根据权利要求31所述的方法，其特征在于，所述向终端设备发送切换命令，包括：
    向所述终端设备发送无线资源控制RRC消息，所述RRC消息中包括用于指示所述终端设备执行RACH-less切换过程的信息。
  33. 一种物理下行控制信道PDCCH监听方法，其特征在于，所述方法由第二网络设备执行，所述方法包括：
    向第一网络设备发送切换命令，所述切换命令用于指示终端设备从所述第一网络设备对应的第一小区，切换至所述第二网络设备对应的第二小区；
    在目标带宽部分BWP发送PDCCH，其中，所述终端设备基于所述目标BWP相关联的控制资源集 CORESET监听所述PDCCH。
  34. 根据权利要求33所述的方法，其特征在于，所述目标BWP为所述第二小区的初始BWP。
  35. 根据权利要求33所述的方法，其特征在于，所述目标BWP为所述第二小区的激活BWP。
  36. 根据权利要求35所述的方法，其特征在于，所述切换命令中包含所述第二小区的激活BWP的配置信息；其中，所述激活BWP的配置信息用于指示所述激活BWP、所述激活BWP相关联的至少一个CORESET，以及所述至少一个CORESET中每个CORESET对应配置的一组传输配置指示TCI状态。
  37. 根据权利要求35或36所述的方法，其特征在于，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听所述第二网络设备发送的PDCCH。
  38. 根据权利要求37所述的方法，其特征在于，如果所述切换命令中包含所述第二小区的激活BWP的配置信息，所述终端设备使用所述配置的TCI状态集合监听PDCCH。
  39. 根据权利要求37所述的方法，其特征在于，所述切换命令中还包括第一信息，所述第一信息用于指示所述终端设备使用或不使用所述配置的TCI状态集合监听PDCCH。
  40. 根据权利要求35或36所述的方法，其特征在于，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听所述第二网络设备发送的PDCCH。
  41. 根据权利要求40所述的方法，其特征在于，所述切换命令中还包括第二信息，所述第二信息用于指示所述激活的至少一个TCI状态。
  42. 根据权利要求41所述的方法，其特征在于，所述第二信息包括比特序列，所述比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。
  43. 根据权利要求41或42所述的方法，其特征在于，
    每个CORESET具有独立对应的所述第二信息；
    或者，
    存在至少两个CORESET共用同一个所述第二信息。
  44. 根据权利要求33至43任一项所述的方法，其特征在于，所述切换命令为RACH-less切换命令，所述RACH-less切换命令用于指示所述终端设备执行RACH-less切换过程。
  45. 根据权利要求33至44任一项所述的方法，其特征在于，所述方法还包括：
    根据参考信息确定所述目标BWP为所述第二小区的初始BWP或所述第二小区的激活BWP；其中，所述参考信息包括以下至少一项：业务需求、BWP负载、终端类型。
  46. 根据权利要求45所述的方法，其特征在于，所述切换命令中包括第三信息，所述第三信息用于向所述终端设备指示基于所述第二小区的初始BWP相关联的CORESET监听所述PDCCH，或者基于所述第二小区的激活BWP相关联的CORESET监听所述PDCCH。
  47. 根据权利要求45所述的方法，其特征在于，所述方法还包括：
    在确定所述目标BWP为所述第二小区的激活BWP的情况下，在所述切换命令中添加所述第二小区的激活BWP的配置信息；
    或者，
    在确定所述目标BWP为所述第二小区的初始BWP的情况下，在所述切换命令中不添加所述第二小区的激活BWP的配置信息。
  48. 一种物理下行控制信道PDCCH监听装置，其特征在于，所述装置包括：
    接收模块，用于接收第一网络设备发送的切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
    监听模块，用于基于所述第二小区的目标带宽部分BWP相关联的控制资源集CORESET，监听所述第二网络设备发送的PDCCH。
  49. 根据权利要求48所述的装置，其特征在于，所述目标BWP为所述第二小区的初始BWP。
  50. 根据权利要求49所述的装置，其特征在于，所述监听模块用于：
    在确定基于所述第二小区的初始BWP相关联的CORESET监听PDCCH的情况下，使用波束扫描方式，在所述终端设备的所有接收波束上接收所述第二网络设备发送的PDCCH。
  51. 根据权利要求49所述的装置，其特征在于，所述监听模块用于：
    在确定基于所述第二小区的初始BWP相关联的CORESET监听PDCCH的情况下，根据波束测量结果，从所述终端设备的所有接收波束中确定至少一个目标接收波束；
    在所述目标接收波束上接收所述第二网络设备发送的PDCCH。
  52. 根据权利要求49至51任一项所述的装置，其特征在于，所述装置还包括确定模块，用于：
    在所述切换命令中包含所述第二小区的初始BWP的配置信息的情况下，根据所述第二小区的初始 BWP的配置信息，确定所述第二小区的初始BWP；
    或者，
    在所述切换命令中不包含所述第二小区的初始BWP的配置信息的情况下，将所述第一小区的初始BWP确定为所述第二小区的初始BWP。
  53. 根据权利要求48所述的装置，其特征在于，所述目标BWP为所述第二小区的激活BWP。
  54. 根据权利要求53所述的装置，其特征在于，所述切换命令中包含所述第二小区的激活BWP的配置信息；其中，所述激活BWP的配置信息用于指示所述激活BWP、所述激活BWP相关联的至少一个CORESET，以及所述至少一个CORESET中每个CORESET对应配置的一组传输配置指示TCI状态。
  55. 根据权利要53或54所述的装置，其特征在于，所述监听模块用于：
    使用所述第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听所述第二网络设备发送的PDCCH。
  56. 根据权利要求55所述的装置，其特征在于，如果所述切换命令中包含所述第二小区的激活BWP的配置信息，所述终端设备使用所述配置的TCI状态集合监听PDCCH。
  57. 根据权利要求55所述的装置，其特征在于，所述切换命令中还包括第一信息，所述第一信息用于指示所述终端设备使用或不使用所述配置的TCI状态集合监听PDCCH。
  58. 根据权利要求53或54所述的装置，其特征在于，所述监听模块用于：
    使用所述第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听所述第二网络设备发送的PDCCH。
  59. 根据权利要求58所述的装置，其特征在于，所述切换命令中还包括第二信息，所述第二信息用于指示所述激活的至少一个TCI状态。
  60. 根据权利要求59所述的装置，其特征在于，所述第二信息包括比特序列，所述比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。
  61. 根据权利要求59或60所述的装置，其特征在于，
    每个CORESET具有独立对应的所述第二信息；
    或者，
    存在至少两个CORESET共用同一个所述第二信息。
  62. 根据权利要求48至61任一项所述的装置，其特征在于，所述切换命令为RACH-less切换命令，所述RACH-less切换命令用于指示所述终端设备执行RACH-less切换过程。
  63. 根据权利要求62所述的装置，其特征在于，所述接收第一网络设备发送的切换命令，包括：
    接收所述第一接入网设备发送的无线资源控制RRC消息，所述RRC消息中包括用于指示所述终端设备执行RACH-less切换过程的信息。
  64. 根据权利要求48至63任一项所述的装置，其特征在于，所述切换命令中包括第三信息，所述第三信息用于向所述终端设备指示基于所述第二小区的初始BWP相关联的CORESET监听所述PDCCH，或者基于所述第二小区的激活BWP相关联的CORESET监听所述PDCCH。
  65. 根据权利要求48至63任一项所述的装置，其特征在于，所述监听模块用于：
    在所述切换命令中包含所述第二小区的激活BWP的配置信息的情况下，所述终端设备基于所述第二小区的激活BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH；
    或者，
    在所述切换命令中未包含所述第二小区的激活BWP的配置信息的情况下，所述终端设备基于所述第二小区的初始BWP相关联的CORESET，监听所述第二网络设备发送的PDCCH。
  66. 根据权利要求48至65任一项所述的装置，其特征在于，所述第二网络设备根据参考信息确定所述目标BWP为所述第二小区的初始BWP或所述第二小区的激活BWP；其中，所述参考信息包括以下至少一项：业务需求、BWP负载、终端类型。
  67. 一种物理下行控制信道PDCCH监听装置，其特征在于，所述装置包括：
    发送模块，用于向终端设备发送切换命令，所述切换命令用于指示所述终端设备从所述第一网络设备对应的第一小区，切换至第二网络设备对应的第二小区；
    其中，所述终端设备基于所述第二小区的目标带宽部分BWP相关联的控制资源集CORESET，监听所述第二网络设备发送的PDCCH。
  68. 根据权利要求67所述的装置，其特征在于，所述目标BWP为所述第二小区的初始BWP。
  69. 根据权利要求67所述的装置，其特征在于，所述目标BWP为所述第二小区的激活BWP。
  70. 根据权利要求69所述的装置，其特征在于，所述切换命令中包含所述第二小区的激活BWP的配 置信息；其中，所述激活BWP的配置信息用于指示所述激活BWP、所述激活BWP相关联的至少一个CORESET，以及所述至少一个CORESET中每个CORESET对应配置的一组传输配置指示TCI状态。
  71. 根据权利要求69或70所述的装置，其特征在于，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听所述第二网络设备发送的PDCCH。
  72. 根据权利要求71所述的装置，其特征在于，如果所述切换命令中包含所述第二小区的激活BWP的配置信息，所述终端设备使用所述配置的TCI状态集合监听PDCCH。
  73. 根据权利要求71所述的装置，其特征在于，所述切换命令中还包括第一信息，所述第一信息用于指示所述终端设备使用或不使用所述配置的TCI状态集合监听PDCCH。
  74. 根据权利要求69或70所述的装置，其特征在于，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听所述第二网络设备发送的PDCCH。
  75. 根据权利要求74所述的装置，其特征在于，所述切换命令中还包括第二信息，所述第二信息用于指示所述激活的至少一个TCI状态。
  76. 根据权利要求75所述的装置，其特征在于，所述第二信息包括比特序列，所述比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。
  77. 根据权利要求75或76所述的装置，其特征在于，
    每个CORESET具有独立对应的所述第二信息；
    或者，
    存在至少两个CORESET共用同一个所述第二信息。
  78. 根据权利要求67至77任一项所述的装置，其特征在于，所述切换命令为RACH-less切换命令，所述RACH-less切换命令用于指示所述终端设备执行RACH-less切换过程。
  79. 根据权利要求78所述的装置，其特征在于，
    所述发送模块，用于向所述终端设备发送无线资源控制RRC消息，所述RRC消息中包括用于指示所述终端设备执行RACH-less切换过程的信息。
  80. 一种物理下行控制信道PDCCH监听装置，其特征在于，所述装置包括：
    第一发送模块，用于向第一网络设备发送切换命令，所述切换命令用于指示终端设备从所述第一网络设备对应的第一小区，切换至所述第二网络设备对应的第二小区；
    第二发送模块，用于在目标带宽部分BWP发送PDCCH，其中，所述终端设备基于所述目标BWP相关联的控制资源集CORESET监听所述PDCCH。
  81. 根据权利要求80所述的装置，其特征在于，所述目标BWP为所述第二小区的初始BWP。
  82. 根据权利要求80所述的装置，其特征在于，所述目标BWP为所述第二小区的激活BWP。
  83. 根据权利要求82所述的装置，其特征在于，所述切换命令中包含所述第二小区的激活BWP的配置信息；其中，所述激活BWP的配置信息用于指示所述激活BWP、所述激活BWP相关联的至少一个CORESET，以及所述至少一个CORESET中每个CORESET对应配置的一组传输配置指示TCI状态。
  84. 根据权利要求82或83所述的装置，其特征在于，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应配置的TCI状态集合，监听所述第二网络设备发送的PDCCH。
  85. 根据权利要求84所述的装置，其特征在于，如果所述切换命令中包含所述第二小区的激活BWP的配置信息，所述终端设备使用所述配置的TCI状态集合监听PDCCH。
  86. 根据权利要求84所述的装置，其特征在于，所述切换命令中还包括第一信息，所述第一信息用于指示所述终端设备使用或不使用所述配置的TCI状态集合监听PDCCH。
  87. 根据权利要求82或83所述的装置，其特征在于，所述终端设备使用所述第二小区的激活BWP相关联的至少一个CORESET对应激活的至少一个TCI状态，监听所述第二网络设备发送的PDCCH。
  88. 根据权利要求87所述的装置，其特征在于，所述切换命令中还包括第二信息，所述第二信息用于指示所述激活的至少一个TCI状态。
  89. 根据权利要求88所述的装置，其特征在于，所述第二信息包括比特序列，所述比特序列中的每个比特用于指示其对应的一个TCI状态激活或不激活。
  90. 根据权利要求88或89所述的装置，其特征在于，
    每个CORESET具有独立对应的所述第二信息；
    或者，
    存在至少两个CORESET共用同一个所述第二信息。
  91. 根据权利要求80至90任一项所述的装置，其特征在于，所述切换命令为RACH-less切换命令，所述RACH-less切换命令用于指示所述终端设备执行RACH-less切换过程。
  92. 根据权利要求80至91任一项所述的装置，其特征在于，所述装置还包括确定模块，用于：
    根据参考信息确定所述目标BWP为所述第二小区的初始BWP或所述第二小区的激活BWP；其中，所述参考信息包括以下至少一项：业务需求、BWP负载、终端类型。
  93. 根据权利要求92所述的装置，其特征在于，所述切换命令中包括第三信息，所述第三信息用于向所述终端设备指示基于所述第二小区的初始BWP相关联的CORESET监听所述PDCCH，或者基于所述第二小区的激活BWP相关联的CORESET监听所述PDCCH。
  94. 根据权利要求92所述的装置，其特征在于，所述装置还包括添加模块，用于：
    在确定所述目标BWP为所述第二小区的激活BWP的情况下，在所述切换命令中添加所述第二小区的激活BWP的配置信息；
    或者，
    在确定所述目标BWP为所述第二小区的初始BWP的情况下，在所述切换命令中不添加所述第二小区的激活BWP的配置信息。
  95. 一种终端设备，其特征在于，所述终端设备包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述计算机程序以实现如权利要求1至19任一项所述的方法。
  96. 一种网络设备，其特征在于，所述网络设备包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述计算机程序以实现如权利要求20至32任一项所述的方法，或者实现如权利要求33至47任一项所述的方法。
  97. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序用于被处理器执行，以实现如权利要求1至19任一项所述的方法，或者实现如权利要求20至32任一项所述的方法,或者实现如权利要求33至47任一项所述的方法。
  98. 一种芯片，其特征在于，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片运行时，用于实现如权利要求1至19任一项所述的方法，或者实现如权利要求20至32任一项所述的方法，或者实现如权利要求33至47任一项所述的方法。
  99. 一种计算机程序产品或计算机程序，其特征在于，所述计算机程序产品或计算机程序包括计算机指令，所述计算机指令存储在计算机可读存储介质中，处理器从所述计算机可读存储介质读取并执行所述计算机指令，以实现如权利要求1至19任一项所述的方法，或者实现如权利要求20至32任一项所述的方法,或者实现如权利要求33至47任一项所述的方法。
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