WO2020199003A1 - 一种切换方法及装置、终端、网络设备 - Google Patents

一种切换方法及装置、终端、网络设备 Download PDF

Info

Publication number
WO2020199003A1
WO2020199003A1 PCT/CN2019/080593 CN2019080593W WO2020199003A1 WO 2020199003 A1 WO2020199003 A1 WO 2020199003A1 CN 2019080593 W CN2019080593 W CN 2019080593W WO 2020199003 A1 WO2020199003 A1 WO 2020199003A1
Authority
WO
WIPO (PCT)
Prior art keywords
candidate target
handover
target cell
type
cell
Prior art date
Application number
PCT/CN2019/080593
Other languages
English (en)
French (fr)
Inventor
尤心
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.)
Filing date
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 CN201980064851.3A priority Critical patent/CN112789895B/zh
Priority to PCT/CN2019/080593 priority patent/WO2020199003A1/zh
Publication of WO2020199003A1 publication Critical patent/WO2020199003A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • the embodiments of the present application relate to the field of mobile communication technology, and specifically relate to a handover method and device, terminal, and network equipment.
  • NR-U New Radio Unlicensed
  • LBT Listen Before Talk
  • the NR-U cell is the cell to be accessed. Since the NR-U cell is not within the Maximum Channel Occupy Time (MCOT), the terminal cannot perform the random access process or handover process for the NR-U cell, and must wait until NR -U cell can only perform corresponding operations within MCOT, which will increase the handover delay, in other words, increase the transmission interruption time, and may even cause handover failure.
  • MCOT Maximum Channel Occupy Time
  • the embodiments of the present application provide a handover method and device, terminal, and network equipment.
  • the terminal sends first information to the source base station, where the first information is used to instruct the source base station to reselect the target cell to be handed over.
  • the source base station receives the first information sent by the terminal, where the first information is used to instruct the source base station to reselect the target cell to be handed over.
  • the terminal receives a second handover command sent by the source base station, where the second handover command is used by the terminal to select a target cell to be handed over from multiple candidate target cells based on a handover condition;
  • the second handover command carries first information, and the first information is used to indicate priority information respectively corresponding to the multiple candidate target cells.
  • the source base station sends a second handover command to the terminal, where the second handover command is used by the terminal to select a target cell to be handed over from multiple candidate target cells based on handover conditions;
  • the second handover command carries first information, and the first information is used to indicate priority information respectively corresponding to the multiple candidate target cells.
  • the terminal When the second condition is satisfied, the terminal reselects the target cell to be handed over; wherein, the second condition includes at least one of the following:
  • the currently selected target cell is a second-type candidate target cell, and the second-type candidate target cell refers to a cell on an unlicensed spectrum;
  • the target base station fails to execute LBT
  • the target cell is not in MCOT
  • candidate target cells satisfy the handover condition, and the other candidate target cells refer to candidate target cells other than the currently selected target cell;
  • candidate target cells satisfy the handover condition, and the other candidate target cells refer to the first-type candidate target cells other than the currently selected target cell;
  • the specific refers to at least one of the following: the handover condition is not met, the handover condition has not been judged, and the handover attempt is not performed;
  • the specific refers to at least one of the following: the handover condition is not met, the handover condition has not been judged, and the handover attempt is not performed;
  • the specific candidate target cell there is a specific candidate target cell, and the specific refers to at least one of the following: the handover condition is not met, the handover condition has not been judged, and the handover attempt is not performed.
  • the sending unit is configured to send first information to the source base station, where the first information is used to instruct the source base station to reselect the target cell to be handed over.
  • the receiving unit is configured to receive first information sent by the terminal, where the first information is used to instruct the source base station to reselect a target cell to be handed over.
  • a receiving unit configured to receive a second handover command sent by the source base station, where the second handover command is used by the terminal to select a target cell to be handed over from multiple candidate target cells based on a handover condition;
  • the second handover command carries first information, and the first information is used to indicate priority information respectively corresponding to the multiple candidate target cells.
  • a sending unit configured to send a second handover command to the terminal, where the second handover command is used by the terminal to select a target cell to be handed over from multiple candidate target cells based on a handover condition;
  • the second handover command carries first information, and the first information is used to indicate priority information respectively corresponding to the multiple candidate target cells.
  • the selecting unit is configured to reselect the target cell to be handed over when the second condition is met; wherein, the second condition includes at least one of the following:
  • the currently selected target cell is a second-type candidate target cell, and the second-type candidate target cell refers to a cell on an unlicensed spectrum;
  • the target base station fails to execute LBT
  • the target cell is not in MCOT
  • candidate target cells satisfy the handover condition, and the other candidate target cells refer to candidate target cells other than the currently selected target cell;
  • candidate target cells satisfy the handover condition, and the other candidate target cells refer to the first-type candidate target cells other than the currently selected target cell;
  • the specific refers to at least one of the following: the handover condition is not met, the handover condition has not been judged, and the handover attempt is not performed;
  • the specific refers to at least one of the following: the handover condition is not met, the handover condition has not been judged, and the handover attempt is not performed;
  • the specific candidate target cell there is a specific candidate target cell, and the specific refers to at least one of the following: the handover condition is not met, the handover condition has not been judged, and the handover attempt is not performed.
  • the terminal provided in the embodiment of the present application includes a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the aforementioned switching method.
  • the network device provided by the embodiment of the present application includes a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the aforementioned switching method.
  • the chip provided in the embodiment of the present application is used to implement the aforementioned switching method.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the above-mentioned switching method.
  • the computer-readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program enables a computer to execute the above-mentioned switching method.
  • the computer program product provided by the embodiment of the present application includes computer program instructions, and the computer program instructions cause a computer to execute the aforementioned switching method.
  • the computer program provided by the embodiment of the present application when it runs on a computer, causes the computer to execute the above-mentioned switching method.
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG. 2 is a HO flowchart provided by an embodiment of the present application.
  • Figure 3 is a conditional HO flow chart provided by an embodiment of the application.
  • FIG. 4 is a first flowchart of a handover method provided by an embodiment of this application.
  • FIG. 5 is a second schematic flowchart of the handover method provided by an embodiment of the application.
  • FIG. 6 is a third schematic flowchart of a handover method provided by an embodiment of the application.
  • FIG. 7 is a fourth flowchart of a handover method provided by an embodiment of this application.
  • FIG. 8 is a fifth schematic flowchart of a handover method provided by an embodiment of this application.
  • FIG. 9 is a sixth flowchart of a handover method provided by an embodiment of this application.
  • FIG. 10 is a schematic diagram 1 of the structural composition of a switching device provided by an embodiment of the application.
  • FIG. 11 is a second schematic diagram of the structural composition of the switching device provided by the embodiment of the application.
  • FIG. 12 is a third schematic diagram of the structural composition of the switching device provided by the embodiment of the application.
  • FIG. 13 is a fourth schematic diagram of the structural composition of a switching device provided by an embodiment of the application.
  • FIG. 14 is a schematic diagram 5 of the structural composition of a switching device provided by an embodiment of the application.
  • FIG. 15 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a chip of an embodiment of the present application.
  • FIG. 17 is a schematic block diagram of a communication system provided by an embodiment of the present application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile Communication
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or called a communication terminal or a terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminals located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNB evolved base station
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches
  • the communication system 100 also includes at least one terminal 120 located within the coverage area of the network device 110.
  • the "terminal” used here includes, but is not limited to, connection via wired lines, such as public switched telephone networks (PSTN), digital subscriber lines (Digital Subscriber Line, DSL), digital cables, and direct cable connections; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM-FM Broadcast transmitter; and/or another terminal's device configured to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • a terminal set to communicate through a wireless interface may be called a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellites or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio phone transceivers Electronic device.
  • PCS Personal Communications System
  • GPS Global Positioning System
  • Terminal can refer to access terminal, user equipment (User Equipment, UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user Device.
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5G networks, or terminals in the future evolution of PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • FIG. 1 exemplarily shows one network device and two terminals.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminals. This embodiment of the present application There is no restriction on this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 and a terminal 120 with communication functions, and the network device 110 and the terminal 120 may be the specific devices described above, which will not be repeated here;
  • the device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • NR can work in unlicensed frequency bands, including the following work scenarios:
  • Carrier aggregation scenario Primary cell (Primary Cell, PCell) is a licensed spectrum, and secondary cells (SCell) working on unlicensed spectrum are aggregated through carrier aggregation.
  • Primary Cell Primary Cell, PCell
  • SCell secondary cells
  • PCell is an LTE licensed spectrum
  • primary and secondary cell Primary Secondary cell, PScell
  • PScell Primary Secondary cell
  • NR works as an independent cell in an unlicensed spectrum.
  • NR-U's working frequency band is 5GHz unlicensed spectrum and 6GHz unlicensed spectrum; on unlicensed spectrum, NR-U design should ensure that it is compatible with other systems already working on these unlicensed spectrums. Fairness between the two. The principle of fairness is that the impact of NR-U on systems already deployed on unlicensed spectrum cannot exceed the impact between these systems.
  • the general energy detection mechanism is the LBT mechanism.
  • the basic principle of the mechanism is that the base station or terminal (transmitting end) needs to listen for a period of time according to regulations before transmitting data on the unlicensed spectrum. If the result of the listening indicates that the channel is idle, the transmitting end can transmit data to the receiving end. If the listening result indicates that the channel is in an occupied state, the transmitting end needs to back off for a period of time according to regulations before continuing to listen to the channel, knowing that the channel listening result is in an idle state, before transmitting data to the receiving end.
  • the base station For downlink data transmission, the base station needs to perform LBT on the unlicensed frequency band; in LAA, the priority of channel access is determined by the following Table 1:
  • Mp is related to the listening channel time for channel access.
  • CWmin, p and CWmax, p are related to the random listening channel time during channel access. Specifically, when the base station listens to the channel for Td time and is idle, it needs to listen to the channel again N times, each time being 9 us. Where N is a random number from 0 to CWp, and CW min,p ⁇ CW p ⁇ CW max,p .
  • Tmcot p is the longest time for the base station to occupy the channel after it has seized the channel. It is related to the channel priority adopted by the base station. For example, if the priority is 1, the channel will be occupied for 2ms at most after the channel is successfully monitored.
  • the base station needs to transmit data to the terminal within the MCOT. If the base station does not seize the channel, the terminal outside the MCOT will not receive the scheduling data from the base station to the terminal.
  • FIG. 2 is a handover (HO) flow chart provided by an embodiment of this application. The flow mainly includes the following steps:
  • the source base station delivers the measurement configuration to the terminal.
  • the terminal performs related measurements based on the measurement configuration, and reports the measurement results to the source base station.
  • the source base station makes a handover decision based on the measurement result (Handove Decision).
  • the source base station initiates a handover request (Handover Request) to the target base station.
  • the target base station performs admission control (Admission Control).
  • the target base station sends a handover request-acknowledgement feedback message (Handover Request Ack) to the source base station.
  • Handover Request Ack a handover request-acknowledgement feedback message
  • the source base station sends an RRC connection reconfiguration message to the terminal, where the RRC connection reconfiguration message carries mobility control information (mobilityControlInformation) of the target base station.
  • mobilityControlInformation mobility control information
  • the RRC connection reconfiguration message is carried in the handover command.
  • the source base station forwards the SN status (SN Status Transfer) to the target base station.
  • the terminal synchronizes to the target base station.
  • the target base station performs periodic uplink allocation (Periodic UL allocation) to the terminal.
  • the target base station configures an uplink allocation and tracking area (Tracking Area, TA) for the terminal.
  • Tracking Area Tracking Area
  • the terminal sends an RRC connection reconfiguration complete message to the target base station.
  • the target base station initiates a path switching request to the MME.
  • the MME initiates a bearer modification request to the Serving Gateway.
  • the serving gateway switches the downlink path.
  • the serving gateway sends a modify bearer response message to the MME.
  • the MME sends a path switching request-confirmation feedback message to the target base station.
  • the target base station notifies the source base station to release the terminal context.
  • the source base station releases resources.
  • the handover process in Figure 2 above mainly includes the following processes:
  • the source base station configures the terminal for measurement report, and sends a handover request to the target base station based on the report result of the terminal. After the target base station agrees to the switch request, it will configure the RRC message for the terminal.
  • the RRC message carries mobility control information (mobilityControlInformation), including random access channel (Random Access Channel, RACH) resources, cell radio network temporary identification (Cell- Radio Network Temporary Identifier (C-RNTI), target base station security algorithm, and target base station system information, etc.
  • mobilityControlInformation including random access channel (Random Access Channel, RACH) resources, cell radio network temporary identification (Cell- Radio Network Temporary Identifier (C-RNTI), target base station security algorithm, and target base station system information, etc.
  • the source base station forwards the mobilityControlInformation to the terminal through the handover command. After receiving the handover command, the terminal initiates a random access procedure to the target base station. At the same time, the source base station will forward the serial number status (Serial Number STATUS TRANSFER, SN STATUS TRANSFER) to the target base station to inform the target base station of the uplink Packet Data Convergence Protocol (PDCP) SN reception status and the downlink PDCP SN transmission status.
  • serial number STATUS TRANSFER Serial Number STATUS TRANSFER
  • SN STATUS TRANSFER serial Number STATUS TRANSFER
  • Steps 12-18 in Figure 2 When the terminal successfully accesses the target base station (that is, the random access is successful), the target base station will initiate a path switch request (PATH SWITCH REQUEST) to request the mobility management entity (Mobility Management Entity, MME) switches the downlink path. After the path switching is completed, the target base station will instruct the source base station to release the terminal context, and the switching is complete.
  • PATH SWITCH REQUEST path switch request
  • MME Mobility Management Entity
  • Conditional handover avoids the problem that the handover preparation time is too long, causing the terminal to switch too late, and the handover command is configured for the terminal in advance.
  • the terminal's operating trajectory is specific, so the base station can allocate the target base station to the terminal in advance, and the handover command includes the condition for triggering the terminal to switch (hereinafter referred to as the handover condition).
  • the handover condition When the handover condition is met, the terminal initiates an access request to the target base station.
  • conditional handover mainly includes the following processes:
  • the source base station delivers the measurement configuration to the terminal, and the terminal performs related measurements based on the measurement configuration and reports the measurement result to the source base station.
  • the source base station issues a handover command to the terminal.
  • the handover command carries configuration information and handover conditions of multiple target base stations.
  • the terminal synchronizes to the target base station (that is, the terminal accesses the target base station).
  • multiple target cells and handover conditions can be configured in the handover command in the conditional handover scenario.
  • the terminal judges which target cell to access based on the configured handover condition.
  • the proposed optimization method for reducing the switching time of the interruption including the following two architectures:
  • SN secondary Node
  • MN master node
  • the terminal continues to maintain the connection with the source base station when receiving the handover command, and at the same time initiates random access to the target base station, and does not release the connection of the source base station until the terminal is connected to the target base station.
  • the embodiment of the present application provides a handover method in the NR-U scenario (especially a condition-based handover method), which is used for the terminal or the network to select a more suitable target cell and reduce the handover delay during the handover process.
  • FIG. 4 is a schematic flowchart 1 of the handover method provided by an embodiment of the application. As shown in FIG. 4, the handover method includes the following steps:
  • Step 401 The terminal sends first information to the source base station, where the first information is used to instruct the source base station to reselect the target cell to be handed over.
  • the terminal may be any device capable of communicating with the network, such as a mobile phone, a tablet computer, a notebook, a vehicle-mounted terminal, and a wearable device.
  • the cell in the source base station may be an NR-U cell, or an NR cell, or an LTE cell.
  • the cell in the target base station is called the target cell.
  • the terminal when the first condition is met, sends first information to the source base station, and the source base station receives the first information sent by the terminal, and the first condition includes at least one of the following: the target base station fails to perform LBT , The time when the terminal performs the handover is not within the MCOT of the target base station and is in the handover process. Specifically, during the handover process, if the target base station fails to perform LBT and/or the time when the terminal performs handover is not within the MCOT of the target base station, the terminal sends the first information to the source base station.
  • the first information is used to instruct the source base station to reselect the target cell to be handed over, which can be implemented in at least one of the following ways:
  • the first information includes instruction information for reselecting the target cell to be handed over;
  • the first information includes indication information that the target base station fails to perform LBT, and the indication information may also instruct the source base station to reselect the target cell to be handed over;
  • the first information includes indication information that the target cell is not in the MCOT, and the indication information may also instruct the source base station to reselect the target cell to be handed over.
  • Step 402 The source base station reselects the target cell to be handed over and/or modifies the priority of the candidate target cell based on the first information.
  • the source base station sends a first handover command to the terminal, and the terminal receives the first handover command sent by the source base station, and the first handover command includes a configuration message of a target cell.
  • the source base station sends a second handover command to the terminal, and the terminal receives a second handover command sent by the source base station, and the second handover command includes at least one candidate target cell Configuration messages and switching conditions.
  • the second handover command includes a configuration message of a candidate target cell and handover conditions.
  • the included candidate target cells may include NR-U cells, NR cells, and LTE cells.
  • the terminal when the currently selected target cell is an NR-U cell, due to the LBT failure, the terminal needs to be in a waiting state until the MCOT, which will cause handover delay or even handover failure.
  • the terminal can report the situation to the source base station in time through the first information in this case (provided that there is a connection between the terminal and the source base station), so as to assist the source base station to reselect the appropriate information based on the first information.
  • the target cell will complete the handover as soon as possible.
  • Fig. 5 is a second schematic diagram of the flow of the handover method provided by the embodiment of the application. As shown in Fig. 5, the handover method includes the following steps:
  • Step 501 The source base station selects the target cell to be handed over, and sends a handover request message to the target base station where the target cell is located.
  • Step 502 The target base station makes a HO decision to determine whether the terminal can access the target cell.
  • Step 503 If the terminal can access the target cell, the target base station sends a handover request confirmation message to the source base station.
  • Step 504 The source base station sends a handover command to the terminal.
  • Step 505 The terminal executes the handover process according to the handover command.
  • Step 506 When the terminal determines that the first condition is met, it sends first information to the source base station, where the first information is used to indicate at least one of the following: the target base station fails to perform LBT, the target cell is not in the MCOT, and the target to be handed over is reselected Community.
  • the first condition includes at least one of the following: the target base station fails to perform LBT, the time when the terminal performs handover is not within the MCOT of the target base station, is in the handover process, and the handover/trying handover is being performed.
  • the source base station reselects the target cell to be handed over or modifies the priority of the candidate target cell according to the first information.
  • Fig. 6 is the third schematic flow chart of the handover method provided by the embodiment of the application. As shown in Fig. 6, the handover method includes the following steps:
  • Step 601 The source base station sends a second handover command to the terminal, and the terminal receives the second handover command sent by the source base station.
  • the second handover command is used by the terminal to select the target cell to be handed over from multiple candidate target cells based on handover conditions.
  • Target cell wherein the second handover command carries first information, and the first information is used to indicate priority information corresponding to the multiple candidate target cells respectively.
  • the first information is used to indicate the priority information corresponding to the multiple candidate target cells, which can be implemented in at least one of the following ways:
  • the first information includes priority information
  • the first information includes cell type information, and the cell type information is used to indicate priority information.
  • the cell type information can be divided according to the type of the spectrum where the cell is located.
  • the cell on the licensed spectrum can be the first type of candidate target cell
  • the cell on the unlicensed spectrum can be the second type of candidate target Community.
  • the cell type information can also be divided in other ways, for example, according to cell identification, according to cell priority, and so on.
  • the multiple candidate target cells include a first-type candidate target cell and/or a second-type candidate target cell.
  • the priority of the candidate target cell of the first type is different from the priority of the candidate target cell of the second type
  • the candidate target cell of the first type refers to a cell on the licensed spectrum
  • the candidate target cell of the second type is Refers to the cell on the unlicensed spectrum.
  • the terminal selects the target cell to be handed over.
  • the terminal may select the target cell to be handed over according to the priority of the cell.
  • the terminal performs at least one of the following actions: sorting the multiple candidate target cells based on priority, determining the order of handover condition judgment based on priority, If two candidate target cells meet the handover condition, prioritize multiple candidate target cells that meet the handover condition, and select the target cell to be handed over according to the priority order among the multiple candidate target cells that meet the handover condition.
  • the priority of the cell may be determined based on the cell type or the target cell to be handed over may be selected. For example, the priority of the cell on the licensed spectrum is higher than the priority of the cell on the unlicensed spectrum. Based on this, the terminal may also sort the multiple candidate target cells based on the cell type. The terminal may also determine the sequence of handover condition judgment based on the cell type. The terminal may also determine the priority of the cell among multiple candidate target cells meeting the handover condition based on the cell type or select the target cell to be handed over.
  • the sequence of determining the handover condition judgment based on the priority refers to the judgment of the handover condition after sorting candidate target cells based on the priority.
  • the second handover command includes 2 candidate target cells, cell1 and cell2, where the priority of cell1 is higher than the priority of cell2, then it is judged whether cell1 meets the handover condition first, and then whether cell2 meets the handover condition.
  • the target cell refers to: when multiple candidate target cells meet the handover condition, sort the candidate target cells that meet the handover condition, and select the target cell to be handover from the sorted candidate target cells.
  • the second handover command includes two candidate target cells, cell1 and cell2, where the priority of cell1 is higher than the priority of cell2. If the handover conditions of the two candidate target cells are both satisfied, then cell1 is considered Is the target cell to be handed over.
  • the priority of the candidate target cell of the first type among the plurality of candidate target cells is higher than the priority of the candidate target cell of the second type.
  • the terminal performs at least one of the following actions: among the multiple candidate target cells, the first type of candidate target cell is preferentially selected to perform handover, the first type of candidate target cell is preferentially selected to perform handover condition judgment, and the When the target cell satisfies the handover condition, the first type of candidate target cell that meets the handover condition is preferentially selected to perform handover, and when multiple candidate target cells meet the handover condition, the first candidate target cell that meets the handover condition is preferentially selected.
  • Class candidate target cell performs handover.
  • the technical solutions of the embodiments of this application can be applied to the conditional HO process.
  • the conditional HO process if the candidate target cell contains an NR-U cell, the priority of the NR cell is different from (for example, higher than) that of the NR-U cell. priority.
  • the second handover command further includes cell type information and/or priority information corresponding to the multiple candidate target cells respectively.
  • the terminal may determine the priority of the candidate target cell according to the cell type information and/or priority information corresponding to the candidate target cell.
  • the cell type information of cell1 is NR-U cell
  • the cell type information of cell2 is NR cell
  • the terminal can determine that the priority of cell1 is lower than the priority of cell2 according to the cell type information.
  • the cell type information of cell1 is NR-U cell and the priority indicator is 1, and the cell type information of cell2 is NR cell and the priority indicator is 2, then the terminal can determine according to the cell type information and priority The priority of cell1 is lower than the priority of cell2.
  • a higher priority cell is preferentially selected/used by the terminal or base station during handover.
  • the terminal based on the priority information and/or channel quality of the candidate target cells, from meeting the handover condition Select the target cell to be handed over from all candidate target cells in.
  • the terminal uses the priority of the candidate target cell to select the NR cell with high priority as the target cell to be handed over, thereby avoiding the failure of LBT when the target cell is an NR-U cell Handover delay.
  • FIG. 7 is a schematic flowchart 4 of the handover method provided by an embodiment of the application. As shown in FIG. 7, the handover method includes the following steps:
  • Step 701 The source base station selects a target cell to be handed over, and sends a handover request message to the target base station where the target cell is located.
  • Step 702 The target base station makes a HO decision to determine whether the terminal can access the target cell.
  • Step 704 The source base station sends a handover command to the terminal.
  • the handover command carries configuration messages and handover conditions of multiple candidate target cells.
  • the handover command also carries cell type information and/or priorities corresponding to multiple candidate target cells.
  • the cell type information may be NR cell, or LTE cell, or NR-U cell, and so on.
  • the priority refers to the selection priority or the usage priority for cell handover/selection/reselection.
  • Step 705 The terminal executes the handover process according to the handover condition and the priority of the candidate target cell.
  • the terminal first determines candidate target cells that meet the handover condition; then, among the candidate target cells that meet the handover condition, select the candidate target cell with the highest priority as the target cell to be handed over. Further, if the candidate target cells meeting the handover condition are all NR-U cells, the terminal selects the target cell to be handed over according to the priority and/or channel quality of the candidate target cell.
  • the terminal sorts candidate target cells according to priority; then, according to the order of priority, judges whether the cell meets the handover condition from highest to bottom; if the current cell meets the handover condition, the cell is the target cell to be handed over Execute or try to perform the handover process in the cell. If the current cell does not meet the handover conditions, continue to try or periodically continue to try in a polling manner until the target cell to be handed over is found. Further, if the candidate target cells meeting the handover condition are all NR-U cells, the terminal selects the target cell to be handed over according to the priority and/or channel quality of the candidate target cell.
  • the terminal may also preferentially use the NR-U cell or the NR cell as the target cell to be handed over according to a predefined rule.
  • Fig. 8 is a schematic flow diagram 5 of the handover method provided by an embodiment of the application. As shown in Fig. 8, the handover method includes the following steps:
  • Step 801 The terminal reselects the target cell to be handed over.
  • the terminal when the second condition is met, the terminal does not perform the handover process on the currently selected target cell, or does not continue to perform the handover process, but reselects the target cell to be handed over.
  • the terminal when the terminal reselects the target cell to be handed over, it may select the target cell to be handed over from other candidate target cells that meet the handover condition based on the channel quality and/or priority of the candidate target cell.
  • the terminal when the terminal starts to perform the handover process on the currently selected target cell, if the second condition is met, the terminal does not perform the handover process on the currently selected target cell.
  • the second condition when the terminal starts to perform the handover process on the currently selected target cell, the second condition is not met; while the terminal performs the handover process on the currently selected target cell, if the second condition is met, the terminal is currently The handover process is not continued on the selected target cell.
  • the terminal reselects the target cell to be handed over when the second condition is met, thereby avoiding the handover delay caused by LBT failure when the target cell is an NR-U cell.
  • FIG. 9 is a schematic diagram 6 of the flow of a handover method provided by an embodiment of the application. As shown in FIG. 9, the handover method includes the following steps:
  • Step 901 The source base station selects a target cell to be handed over, and sends a handover request message to the target base station where the target cell is located.
  • Step 902 The target base station makes a HO decision to determine whether the terminal can access the target cell.
  • Step 903 If the terminal can access the target cell, the target base station sends a handover request confirmation message to the source base station.
  • Step 904 The source base station sends a handover command to the terminal.
  • the handover command carries configuration messages and handover conditions of multiple candidate target cells.
  • the handover command also carries cell type information and/or priorities corresponding to multiple candidate target cells.
  • the cell type information may be NR cell, or LTE cell, or NR-U cell, and so on.
  • the priority refers to the selection priority or use priority for cell selection/reselection.
  • Step 905 The terminal executes the switching process according to the switching command.
  • the terminal does not perform or continue to perform the handover process on the currently selected target handover cell, but reselects the target cell to be handover.
  • the second condition includes at least one of the following: the currently selected target cell is an NR-U cell, the base station fails to perform LBT, the target cell is not in the MCOT, and other candidate target cells meet the handover condition.
  • the terminal may select the cell with the best channel quality among other candidate target cells as the target cell to be handed over.
  • FIG. 10 is a schematic diagram 1 of the structural composition of a switching device provided by an embodiment of the application.
  • the switching device is applied to the terminal side.
  • the switching device includes:
  • the sending unit 1001 is configured to send first information to a source base station, where the first information is used to instruct the source base station to reselect a target cell to be handed over.
  • the sending unit 1001 is configured to send first information to the source base station when a first condition is met, and the first condition includes at least one of the following: the target base station fails to perform LBT, and the terminal executes The handover time is not within the MCOT of the target base station and is in the handover process.
  • the device further includes:
  • the receiving unit 1002 is configured to receive a first handover command sent by the source base station, where the first handover command includes a configuration message of a target cell.
  • the device further includes:
  • the receiving unit 1002 is configured to receive a second handover command sent by the source base station, where the second handover command includes a configuration message of at least one candidate target cell and a handover condition.
  • FIG. 11 is a second schematic diagram of the structural composition of the switching device provided by the embodiment of the application.
  • the switching device is applied to the source base station side. As shown in FIG. 11, the switching device includes:
  • the receiving unit 1101 is configured to receive first information sent by a terminal, where the first information is used to instruct the source base station to reselect a target cell to be handed over.
  • the first information is sent by the terminal to the source base station when the first condition is met; wherein, the first condition includes at least one of the following: the target base station fails to perform LBT, The time when the terminal performs the handover is not within the MCOT of the target base station and is in the handover process.
  • the device further includes:
  • the sending unit 1102 is configured to send a first handover command to the terminal, where the first handover command includes a configuration message of a target cell.
  • the device further includes:
  • the sending unit 1102 is configured to send a second handover command to the terminal, where the second handover command includes a configuration message of at least one candidate target cell and a handover condition.
  • FIG. 12 is a schematic diagram of the third structural composition of a switching device provided by an embodiment of the application.
  • the switching device is applied to the terminal side.
  • the switching device includes:
  • the receiving unit 1201 is configured to receive a second handover command sent by the source base station, where the second handover command is used by the terminal to select a target cell to be handed over from multiple candidate target cells based on handover conditions;
  • the second handover command carries first information, and the first information is used to indicate priority information respectively corresponding to the multiple candidate target cells.
  • the first information includes priority information; or,
  • the first information includes cell type information, and the cell type information is used to indicate priority information.
  • the multiple candidate target cells include a first-type candidate target cell and/or a second-type candidate target cell, and the priority of the first-type candidate target cell is different from the second-type candidate target
  • the candidate target cell of the first type refers to a cell on a licensed spectrum
  • the candidate target cell of the second type refers to a cell on an unlicensed spectrum.
  • the sorting unit (not shown in the figure) is configured to perform at least one of the following actions: sort the multiple candidate target cells based on priority, determine the sequence of handover condition judgment based on priority, and satisfy handover in multiple candidate target cells In the case of conditions, prioritize multiple candidate target cells that meet the handover condition, and select the target cell to be handed over in the order of priority among multiple candidate target cells that meet the handover condition.
  • the device further includes:
  • the selecting unit 1202 is configured to perform at least one of the following actions: among the plurality of candidate target cells, a first-type candidate target cell is preferentially selected to perform handover, a first-type candidate target cell is preferentially selected to perform handover condition judgment, and a plurality of candidate target cells are When the target cell satisfies the handover condition, the first type of candidate target cell that meets the handover condition is preferentially selected to perform handover, and when multiple candidate target cells meet the handover condition, the first candidate target cell that meets the handover condition is preferentially selected. Class candidate target cell performs handover.
  • the device further includes:
  • the selecting unit 1202 is configured to, if all the candidate target cells that meet the handover condition are the second-type candidate target cells, based on the priority information and/or channel quality of the candidate target cells, select all candidate target cells that meet the handover condition Select the target cell to be handed over from the target cells.
  • FIG. 13 is a schematic diagram 4 of the structural composition of a handover device provided by an embodiment of the application.
  • the handover device is applied to the source base station side.
  • the handover device includes:
  • the sending unit 1301 is configured to send a second handover command to the terminal, where the second handover command is used by the terminal to select a target cell to be handed over from multiple candidate target cells based on handover conditions;
  • the second handover command carries first information, and the first information is used to indicate priority information respectively corresponding to the multiple candidate target cells.
  • the first information includes priority information; or, the first information includes cell type information, and the cell type information is used to indicate priority information.
  • the multiple candidate target cells include a first-type candidate target cell and/or a second-type candidate target cell, and the priority of the first-type candidate target cell is different from the second-type candidate target
  • the candidate target cell of the first type refers to a cell on a licensed spectrum
  • the candidate target cell of the second type refers to a cell on an unlicensed spectrum.
  • the priority of the candidate target cell of the first type among the plurality of candidate target cells is higher than the priority of the candidate target cell of the second type.
  • Fig. 14 is a schematic diagram 5 of the structural composition of a switching device provided by an embodiment of the application.
  • the switching device is applied to the terminal side.
  • the switching device includes:
  • the selecting unit 1401 is configured to reselect the target cell to be handed over when the second condition is met; wherein the second condition includes at least one of the following:
  • the currently selected target cell is a second-type candidate target cell, and the second-type candidate target cell refers to a cell on an unlicensed spectrum;
  • the target base station fails to execute LBT
  • the target cell is not in MCOT
  • candidate target cells satisfy the handover condition, and the other candidate target cells refer to candidate target cells other than the currently selected target cell;
  • candidate target cells satisfy the handover condition, and the other candidate target cells refer to the first-type candidate target cells other than the currently selected target cell;
  • the specific refers to at least one of the following: the handover condition is not met, the handover condition has not been judged, and the handover attempt is not performed;
  • the specific candidate target cell there is a specific candidate target cell, and the specific refers to at least one of the following: the handover condition is not met, the handover condition has not been judged, and the handover attempt is not performed.
  • the device further includes:
  • the receiving unit 1402 is configured to receive a second handover command sent by the source base station, where the second handover command includes configuration messages and handover conditions of multiple candidate target cells.
  • the selection unit 1401 is configured to select the target cell to be handed over from other candidate target cells that meet the handover condition based on the channel quality and/or priority of the candidate target cell.
  • FIG. 15 is a schematic structural diagram of a communication device 1500 according to an embodiment of the present application.
  • the communication device can be a terminal or a network device (such as a source base station).
  • the communication device 1500 shown in FIG. 15 includes a processor 1510.
  • the processor 1510 can call and run a computer program from a memory to implement the embodiments of the present application. Method in.
  • the communication device 1500 may further include a memory 1520.
  • the processor 1510 may call and run a computer program from the memory 1520 to implement the method in the embodiment of the present application.
  • the memory 1520 may be a separate device independent of the processor 1510, or may be integrated in the processor 1510.
  • the communication device 1500 may further include a transceiver 1530, and the processor 1510 may control the transceiver 1530 to communicate with other devices, specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 1530 may include a transmitter and a receiver.
  • the transceiver 1530 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 1500 may specifically be a network device of an embodiment of the application, and the communication device 1500 may implement the corresponding process implemented by the network device in each method of the embodiment of the application. For brevity, details are not repeated here. .
  • the communication device 1500 may specifically be a mobile terminal/terminal according to an embodiment of the application, and the communication device 1500 may implement the corresponding procedures implemented by the mobile terminal/terminal in each method of the embodiments of the application. For the sake of brevity, This will not be repeated here.
  • the chip 1600 may further include a memory 1620.
  • the processor 1610 may call and run a computer program from the memory 1620 to implement the method in the embodiment of the present application.
  • the memory 1620 may be a separate device independent of the processor 1610, or may be integrated in the processor 1610.
  • the chip 1600 may further include an input interface 1630.
  • the processor 1610 can control the input interface 1630 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the chip 1600 may further include an output interface 1640.
  • the processor 1610 can control the output interface 1640 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application.
  • the chip can be applied to the mobile terminal/terminal in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the mobile terminal/terminal in each method of the embodiment of the present application.
  • it will not be omitted here. Repeat.
  • the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip, etc.
  • FIG. 17 is a schematic block diagram of a communication system 1700 according to an embodiment of the present application. As shown in FIG. 17, the communication system 1700 includes a terminal 1710 and a network device 1720.
  • the terminal 1710 may be used to implement the corresponding functions implemented by the terminal in the foregoing method
  • the network device 1720 may be used to implement the corresponding functions implemented by the network device in the foregoing method.
  • details are not described herein again.
  • the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC application specific integrated circuit
  • FPGA ready-made programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • Synchlink DRAM SLDRAM
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer-readable storage medium may be applied to the mobile terminal/terminal in the embodiments of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the mobile terminal/terminal in the various methods of the embodiments of the present application, for It’s concise and will not be repeated here.
  • the embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program product can be applied to the mobile terminal/terminal in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding procedures implemented by the mobile terminal/terminal in the various methods of the embodiments of the present application, for the sake of brevity , I won’t repeat it here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the computer program can be applied to the mobile terminal/terminal in the embodiments of the present application.
  • the computer program runs on the computer, the computer can execute the corresponding methods implemented by the mobile terminal/terminal in the various methods of the embodiments of the present application. For the sake of brevity, the process will not be repeated here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请实施例提供一种切换方法及装置、终端、网络设备，该方法包括：终端向源基站发送第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。

Description

一种切换方法及装置、终端、网络设备 技术领域
本申请实施例涉及移动通信技术领域，具体涉及一种切换方法及装置、终端、网络设备。
背景技术
在新无线非授权(New Radio Unlicensed，NR-U)中，由于目标基站执行先侦听后传输(Listen Before Talk，LBT)失败，即使NR-U小区被选择为待切换的目标小区或者终端选择NR-U小区作为待接入的小区，由于NR-U小区不在最大信道占用时间(Maximum Channel Occupy Time，MCOT)内，终端无法对NR-U小区执行随机接入过程或者切换过程，必须等到NR-U小区在MCOT内才能执行相应的操作，这将导致切换时延增大，换句话说，增加了传输中断时间，甚至可能造成切换失败。
发明内容
本申请实施例提供一种切换方法及装置、终端、网络设备。
本申请实施例提供的切换方法，包括：
终端向源基站发送第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
本申请实施例提供的切换方法，包括：
源基站接收终端发送的第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
本申请实施例提供的切换方法，包括：
终端接收源基站发送的第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
本申请实施例提供的切换方法，包括：
源基站向终端发送第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
本申请实施例提供的切换方法，包括：
终端在满足第二条件的情况下，重新选择待切换的目标小区；其中，所述第二条件包括以下至少之一：
当前选择的目标小区为第二类候选目标小区，所述第二类候选目标小区是指非授权频谱上的小区；
目标基站执行LBT失败；
目标小区不在MCOT内；
其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的候选目标小区；
其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的第一类候选目标小区；
存在特定第一类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
存在特定第二类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
存在特定候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试。
本申请实施例提供的切换装置，包括：
发送单元，用于向源基站发送第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
本申请实施例提供的切换装置，包括：
接收单元，用于接收终端发送的第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
本申请实施例提供的切换装置，包括：
接收单元，用于接收源基站发送的第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
本申请实施例提供的切换装置，包括：
发送单元，用于向终端发送第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
本申请实施例提供的切换装置，包括：
选择单元，用于在满足第二条件的情况下，重新选择待切换的目标小区；其中，所述第二条件包括以下至少之一：
当前选择的目标小区为第二类候选目标小区，所述第二类候选目标小区是指非授权频谱上的小区；
目标基站执行LBT失败；
目标小区不在MCOT内；
其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的候选目标小区；
其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的第一类候选目标小区；
存在特定第一类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
存在特定第二类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
存在特定候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试。
本申请实施例提供的终端，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述的切换方法。
本申请实施例提供的网络设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述的切换方法。
本申请实施例提供的芯片，用于实现上述的切换方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备执行上述的切换方法。
本申请实施例提供的计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述的切换方法。
本申请实施例提供的计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述的切换方法。
本申请实施例提供的计算机程序，当其在计算机上运行时，使得计算机执行上述的切换方法。
通过上述技术方案，在目标基站执行LBT失败的情况下，和/或终端执行切换的时间不在目标基站的MCOT内的情况下，终端及时将该情况通过第一信息上报给源基站，从而辅助源基站 根据该第一信息重新选择待切换的目标小区，达到尽快完成切换的目的。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是本申请实施例提供的一种通信系统架构的示意性图；
图2是本申请实施例提供的HO流程图；
图3是本申请实施例提供的conditional HO流程图；
图4为本申请实施例提供的切换方法的流程示意图一；
图5为本申请实施例提供的切换方法的流程示意图二；
图6为本申请实施例提供的切换方法的流程示意图三；
图7为本申请实施例提供的切换方法的流程示意图四；
图8为本申请实施例提供的切换方法的流程示意图五；
图9为本申请实施例提供的切换方法的流程示意图六；
图10为本申请实施例提供的切换装置的结构组成示意图一；
图11为本申请实施例提供的切换装置的结构组成示意图二；
图12为本申请实施例提供的切换装置的结构组成示意图三；
图13为本申请实施例提供的切换装置的结构组成示意图四；
图14为本申请实施例提供的切换装置的结构组成示意图五；
图15是本申请实施例提供的一种通信设备示意性结构图；
图16是本申请实施例的芯片的示意性结构图；
图17是本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统或5G系统等。
示例性的，本申请实施例应用的通信系统100如图1所示。该通信系统100可以包括网络设备110，网络设备110可以是与终端120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端进行通信。可选地，该网络设备110可以是GSM系统或CDMA系统中的基站(Base Transceiver Station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者是云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络侧设备或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)中的网络设备等。
该通信系统100还包括位于网络设备110覆盖范围内的至少一个终端120。作为在此使用的“终端”包括但不限于经由有线线路连接，如经由公共交换电话网络(Public Switched Telephone Networks，PSTN)、数字用户线路(Digital Subscriber Line，DSL)、数字电缆、直接电缆连接；和/或另一数据连接/网络；和/或经由无线接口，如，针对蜂窝网络、无线局域网(Wireless Local Area Network，WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器；和/或另一终端的被设置成接收/发送通信信号的装置；和/或物联网(Internet of Things，IoT)设备。被设置成通过无线接口通信 的终端可以被称为“无线通信终端”、“无线终端”或“移动终端”。移动终端的示例包括但不限于卫星或蜂窝电话；可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(Personal Communications System，PCS)终端；可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(Global Positioning System，GPS)接收器的PDA；以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。终端可以指接入终端、用户设备(User Equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、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、5G网络中的终端或者未来演进的PLMN中的终端等。
可选地，终端120之间可以进行终端直连(Device to Device，D2D)通信。
可选地，5G系统或5G网络还可以称为新无线(New Radio，NR)系统或NR网络。
图1示例性地示出了一个网络设备和两个终端，可选地，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端，本申请实施例对此不做限定。
可选地，该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例对此不作限定。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例，通信设备可包括具有通信功能的网络设备110和终端120，网络设备110和终端120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种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。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
为便于理解本申请实施例的技术方案，以下对本申请实施例相关的技术概念进行说明。
NR可以工作在非授权频段，包括如下几种工作场景：
1)载波聚合场景：主小区(Primary Cell，PCell)为授权频谱，通过载波聚合方式聚合工作在非授权频谱上的辅小区(Secondary Cell，SCell)。
2)双连接工作场景：PCell为LTE授权频谱，主辅小区(Primary Secondary cell，PScell)为NR非授权频谱。
3)独立工作场景：NR作为一个独立小区工作在非授权频谱。
一般来说，NR-U的工作频带(Band)为5GHz非授权频谱和6GHz非授权频谱；在非授权频谱上，NR-U的设计应该保证与其他已经工作在这些非授权频谱上的系统之间的公平性。公平性的原则是，NR-U对于已经部署在非授权频谱上的系统的影响不能超过这些系统之间的影响。
为了保证在非授权频谱上各系统之间的公平性共存，能量检测已经被同意作为一个基本的共存机制。一般的能量检测机制为LBT机制，该机制的基本原理为，基站或者终端(传输端)在非授权频谱上传输数据之前，需要先按照规定侦听一段时间。如果侦听的结果表示该信道为空闲状态，则传输端可以给接收端传输数据。如果侦听的结果表示该信道为占用状态，则传输端需要根据规定回退一段时间再继续侦听信道，知道信道侦听结果为空闲状态，才能向接收端传输数据。
对于下行数据传输，在非授权频段上，基站需要执行LBT；在LAA中，信道接入的优先级由如下表1决定：
Figure PCTCN2019080593-appb-000001
表1
其中，Mp与执行信道接入的侦听信道时间有关系。具体的，基站需要先执行Td时间的信道侦听，其中Td＝16us+Mp×9us。
CWmin，p和CWmax，p与信道接入过程中的随机侦听信道时间有关系。具体的，在基站侦听Td时间信道为空闲时，需要再侦听N次信道，每次时长为9us。其中N为一个从0到CWp之间的随机数，而CW min,p≤CW p≤CW max,p。
Tmcot，p为基站抢占到信道之后，占用信道的最长时间，它与基站采用的信道优先级有关系，比如优先级为1，则信道侦听成功之后，最多占用信道2ms。
综上，对于终端侧来讲，基站给终端传输数据需要在MCOT内，如果基站没有抢占到信道，在MCOT以外终端是不会收到基站给终端的调度数据的。
参照图2，图2为本申请实施例提供的切换(Handover，HO)流程图，该流程主要包括如下步骤：
1、源基站给终端下发测量配置。
2、终端基于测量配置进行相关测量，向源基站上报测量结果。
3、源基站基于测量结果做切换决定(Handove decision)。
4、源基站向目标基站发起切换请求(Handover Request)。
5、目标基站做准入控制(Admission Control)。
6、目标基站向源基站发送切换请求-确认反馈消息(Handover Request Ack)。
7、源基站向终端发送RRC连接重配置消息，该RRC连接重配置消息携带目标基站的移动性控制信息(mobilityControlInformation)。
这里，RRC连接重配置消息携带在切换命令中。
8、源基站向目标基站进行SN状态转发(SN Status Transfer)。
9、终端同步至目标基站。
10a、目标基站给终端进行周期的上行分配(Periodic UL allocation)。
10b、目标基站给终端配置上行分配和跟踪区(Tracking Area，TA)。
11、终端向目标基站发送RRC连接重配置完成消息。
12、目标基站向MME发起路径切换请求。
13、MME向服务网关(Serving Gateway)发起修改承载请求。
14、服务网关切换下行路径。
15、服务网关向MME发送修改承载响应消息。
16、MME向目标基站发送路径切换请求-确认反馈消息。
17、目标基站通知源基站释放终端上下文。
18、源基站释放资源。
上述图2中的切换过程主要包括如下流程：
-切换准备(图2中的步骤1-6)：源基站配置终端进行测量上报，并基于终端的上报结果向目标基站发送切换请求。当目标基站同意换请求后，会为终端配置RRC消息，该RRC消息携带移动性控制信息(mobilityControlInformation)，其中包括随机接入信道(Random Access Channel，RACH)资源、小区无线网络临时标识(Cell-Radio Network Temporary Identifier，C-RNTI)、目标基站安全算法以及目标基站的系统消息等。
-切换执行(图2中的步骤7-11)：源基站通过切换命令转发mobilityControlInformation给终 端，终端收到切换命令后，向目标基站发起随机接入流程。同时源基站会向目标基站进行序列号状态转发(Serial Number STATUS TRANSFER，SN STATUS TRANSFER)，告诉目标基站上行分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)SN接收状态以及下行PDCP SN发送状态。
-切换完成(图2中的步骤12-18)：当终端成功接入目标基站后(即随机接入成功)，目标基站会发起路径切换请求(PATH SWITCH REQUEST)，请求移动性管理实体(Mobility Management Entity，MME)切换下行路径，路径切换完成后目标基站会指示源基站释放终端上下文，切换完成。
对于某些特殊场景，比如终端高速移动或者高频条件下，需要频繁的进行切换。基于条件的切换(conditional handover，conditional HO)避免了切换准备时间过长，导致终端要切换的时候已经过晚的问题，为终端提前配置了切换命令。另一方面，对于高铁场景，终端的运行轨迹是特定的，所以基站可以提前把目标基站配给终端，并且在切换命令中包含用于触发终端进行切换的条件(以下简称切换条件)，当目标基站满足切换条件时，终端向该目标基站发起接入请求。
如图3所示，conditional handover主要包括如下流程：
1、终端与源基站之间进行测量配置/上报测量结果。
这里，源基站向终端下发测量配置，终端基于测量配置进行相关测量并向源基站上报测量结果。
2、源基站与目标基站之间进行切换准备流程。
3、源基站向终端下发切换命令，该切换命令携带多个目标基站的配置信息和切换条件。
4、目标基站满足切换条件时，终端同步至目标基站(即终端接入到目标基站)。
进一步，conditional handover场景下的切换命令中可以配置多个目标小区以及切换条件。终端基于所配置的切换条件判断接入哪个目标小区。
在第三代合作伙伴计划(3 rd Generation Partnership Project，3GPP)移动性增强课题中，提出了对于切换时减小中断时间的优化方法，包括以下两种架构：
1)基于双连接的切换(DC based HO)
在切换时，先把目标基站添加为辅节点(Secondary Node，SN)，然后通过角色改变(role change)信令来把SN(目标基站)变为主节点(Master Node，MN)，最后再把源基站释放掉，从而达到切换时候中断时间减小的效果。
2)基于eMBB的切换(eMBB based HO)
基于现有的切换流程，终端在收到切换命令时继续保持和源基站的连接，同时向目标基站发起随机接入，直到终端与目标基站接入完成才释放源基站的连接。
在NR-U中，由于目标基站执行LBT失败，导致NR-U小区不在MCOT内，终端无法直接执行随机接入过程或者切换过程。为此，本申请实施例给出了NR-U场景下的切换方法(特别是基于条件的切换方法)，用以终端或者网络选择更合适的目标小区，减少切换过程中的切换时延。
图4为本申请实施例提供的切换方法的流程示意图一，如图4所示，所述切换方法包括以下步骤：
步骤401：终端向源基站发送第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
本申请实施例中，所述终端可以是手机、平板电脑、笔记本、车载终端、可穿戴式设备等任意能够与网络进行通信的设备。
本申请实施例中，源基站中的小区可以是NR-U小区、或NR小区、或LTE小区。
本申请实施例中，目标基站中的小区称为目标小区。
本申请实施例应用于切换过程，进一步，在一实施方式中，切换过程可以是DC based HO，在另一实施方式中，切换过程可以是eMBB based HO。
在一实施方式中，终端在满足第一条件的情况下，向源基站发送第一信息，源基站接收终端发送的第一信息，所述第一条件包括以下至少之一：目标基站执行LBT失败、终端执行切换的时间不在目标基站的MCOT内、在切换过程中。具体地，在切换过程中，若目标基站执行LBT失败和/或终端执行切换的时间不在目标基站的MCOT内，则终端向源基站发送第一信息。
需要说明的是，所述第一信息用于指示所述源基站重新选择待切换的目标小区，可以通过以下至少一种方式来实现：
1)所述第一信息包括重新选择待切换的目标小区的指示信息；
2)所述第一信息包括目标基站执行LBT失败的指示信息，该指示信息也可以指示源基站重新选择待切换的目标小区；
3)所述第一信息包括目标小区不在MCOT内的指示信息，该指示信息也可以指示源基站重新选择待切换的目标小区。
步骤402：所述源基站基于所述第一信息，重新选择待切换的目标小区和/或修改候选目标小区的优先级。
需要说明的是，本实施例的技术方案可以应用于HO过程，或conditional HO过程。其中，
1)HO过程的情况下，所述源基站向所述终端发送第一切换命令，所终端接收所述源基站发送的第一切换命令，所述第一切换命令包括一个目标小区的配置消息。
2)conditional HO过程的情况下，所述源基站向所述终端发送第二切换命令，所述终端接收所述源基站发送的第二切换命令，所述第二切换命令包括至少一个候选目标小区的配置消息以及切换条件。特别地，所述第二切换命令包括一个候选目标小区的配置消息以及切换条件。在此场景下，包含的候选目标小区可以包含NR-U小区，NR小区，LTE小区。
现有技术的缺点在于当前选择的目标小区为NR-U小区时，由于LBT失败，终端需要一直处于等待的状态，直至等到MCOT，这将造成切换时延甚至切换失败。本申请实施例的技术方案，终端可以在此情况下，及时将该情况通过第一信息上报给源基站(前提是终端和源基站存在连接)，以辅助源基站基于该第一信息重新选择合适的目标小区尽快完成切换。
图5为本申请实施例提供的切换方法的流程示意图二，如图5所示，所述切换方法包括以下步骤：
步骤501：源基站选择待切换的目标小区，向该目标小区所在的目标基站发送切换请求消息。
步骤502：目标基站进行切换判决(HO decision)，确定该终端是否可以接入目标小区。
步骤503：若终端可以接入目标小区，目标基站向源基站发送切换请求确认消息。
步骤504：源基站向终端发送切换命令。
步骤505：终端根据切换命令执行切换过程。
步骤506：终端确定第一条件满足时，向源基站发送第一信息，所述第一信息用于指示以下至少之一：目标基站执行LBT失败、目标小区不在MCOT内、重新选择待切换的目标小区。
其中，所述第一条件包括以下至少之一：目标基站执行LBT失败、终端执行切换的时间不在目标基站的MCOT内、在切换过程中、正在执行切换/尝试切换。
经过上述步骤506之后，源基站根据第一信息重新选择待切换的目标小区或者修改候选目标小区的优先级。
图6为本申请实施例提供的切换方法的流程示意图三，如图6所示，所述切换方法包括以下步骤：
步骤601：源基站向终端发送第二切换命令，终端接收源基站发送的第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
本申请实施例中，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息，可以通过以下至少一种方式来实现：
1)所述第一信息包括优先级信息；
2)所述第一信息包括小区类型信息，所述小区类型信息用于指示优先级信息。
本申请实例中，小区类型信息可以按照小区所在频谱的类型来划分，具体地，对于授权频谱上的小区可以作为第一类候选目标小区，对于非授权频谱上的小区可以作为第二类候选目标小区。
当然，小区类型信息还可以按照其他方式来划分，例如按照小区标识来划分，按照小区优先级来划分等等。
本申请实例中，所述多个候选目标小区中包含第一类候选目标小区和/或第二类候选目标小区。其中，第一类候选目标小区的优先级不同于所述第二类候选目标小区的优先级，所述第一类候选目标小区是指授权频谱上的小区，所述第二类候选目标小区是指非授权频谱上的小区。
本申请实施例中，所述终端选择待切换的目标小区。这里，所述终端可以按照小区的优先级来选择待切换的目标小区。具体地，终端接收源基站发送的第二切换命令后，所述终端执行以下行为至少之一：基于优先级排序所述多个候选目标小区、基于优先级确定切换条件判断的先后顺序、在多个候选目标小区满足切换条件的情况下对满足切换条件的多个候选目标小区进行优先级排序、在满足切换条件的多个候选目标小区中按照优先级顺序选择待切换的目标小区。
在一实施方式中，可以基于小区的类型确定小区的优先级或选择待切换的目标小区，如授权频谱上的小区的优先级高于非授权频谱上的小区的优先级。基于此，终端也可以基于小区类型排序所述多个候选目标小区。终端也可以基于小区类型确定切换条件判断的先后顺序。终端也可以基于小区类型在满足切换条件的多个候选目标小区中确定小区的优先级或选择待切换的目标小区。
需要说明的是，基于优先级确定切换条件判断的先后顺序是指：基于优先级排序候选目标小区后进行切换条件的判断。举个例子：第二切换命令包括2个候选目标小区，分别为cell1和cell2，其中，cell1的优先级高于cell2的优先级，那么，先判断cell1是否满足切换条件，后判断cell2是否满足切换条件。
需要说明的是，在多个候选目标小区满足切换条件的情况下对满足切换条件的多个候选目标小区进行优先级排序，在满足切换条件的多个候选目标小区中按照优先级顺序选择待切换的目标小区指：在多个候选目标小区满足切换条件的情况下对满足切换条件的候选目标小区进行排序，从排序好的候选目标小区中选择待切换的目标小区。举个例子：第二切换命令包括2个候选目标小区，分别为cell1和cell2，其中，cell1的优先级高于cell2的优先级，若两个候选目标小区的切换条件均满足那么，则认为cell1为待切换的目标小区。
在本申请的一种实施方式中，所述多个候选目标小区中的第一类候选目标小区的优先级高于第二类候选目标小区的优先级。基于此，所述终端执行以下行为至少之一：在所述多个候选目标小区中优先选择第一类候选目标小区执行切换、优先选择第一类候选目标小区执行切换条件判断、在多个候选目标小区满足切换条件的情况下优先选择满足切换条件的第一类候选目标小区执行切换、在多个候选目标小区满足切换条件的情况下在满足切换条件的多个候选目标小区中优先选择第一类候选目标小区执行切换。
本申请实施例的技术方案可以应用于conditional HO过程，在conditional HO过程中，若候选目标小区中包含NR-U小区，那么，NR小区的优先级不同于(如高于)NR-U小区的优先级。
本申请实施例中，所述第二切换命令还包括所述多个候选目标小区分别对应的小区类型信息和/或优先级信息。如此，终端可以根据候选目标小区对应的小区类型信息和/或优先级信息，来确定该候选目标小区的优先级。举个例子：cell1的小区类型信息为NR-U小区，cell2的小区类型信息为NR小区，那么，终端根据小区类型信息可以判断出cell1的优先级低于cell2的优先级。另举个例子：cell1的小区类型信息为NR-U小区且优先级指示为1，cell2的小区类型信息为NR小区且优先级指示为2，那么，终端根据小区类型信息和优先级可以判断出cell1的优先级低于cell2的优先级。
需要说明的是，较高优先级的小区在进行切换时被所述终端或基站优先选择/使用。
需要说明的是，较高优先级的小区在进行小区选择/重选时被优先选择/使用。
本申请实施例中，如果满足所述切换条件的全部候选目标小区均为第二类候选目标小区，则所述终端基于候选目标小区的优先级信息和/或信道质量，从满足所述切换条件的全部候选目标小区中选择待切换的目标小区。
本申请实施例的技术方案，终端利用候选目标小区的优先级选择具有高优先级的NR小区作为待切换的目标小区，从而避免了目标小区是NR-U小区的情况下，由于LBT失败导致的切换时延。
图7为本申请实施例提供的切换方法的流程示意图四，如图7所示，所述切换方法包括以下步骤：
步骤701：源基站选择待切换的目标小区，向该目标小区所在的目标基站发送切换请求消息。
步骤702：目标基站进行切换判决(HO decision)，确定该终端是否可以接入目标小区。
步骤703：若终端可以接入目标小区，目标基站向源基站发送切换请求确认消息。
步骤704：源基站向终端发送切换命令，该切换命令携带多个候选目标小区的配置消息和切换条件。
进一步，所述切换命令还携带多个候选目标小区分别对应的小区类型信息和/或优先级。
这里，小区类型信息可以是NR小区、或LTE小区、或NR-U小区等等。
这里，优先级是指用于小区切换/选择/重选的选择优先级或使用优先级。
步骤705：终端根据切换条件和候选目标小区的优先级，执行切换过程。
举个例子：终端首先确定满足切换条件的候选目标小区；然后，在满足切换条件的候选目标小区中，选择优先级最高的候选目标小区作为待切换的目标小区。进一步，若满足切换条件的候选目标小区均为NR-U小区，则终端按照候选目标小区的优先级和/或信道质量选择待切换的目标小区。
举个例子：终端按照优先级对候选目标小区进行排序；然后按照优先级排序的顺序，从高到底 判断小区是否满足切换条件；若当前小区满足切换条件，则在该小区为待切换的目标小区，在该小区执行或尝试执行切换过程，若当前小区不满足切换条件，则按照轮询的方式继续尝试或周期性继续尝试，直至找到待切换的目标小区。进一步，若满足切换条件的候选目标小区均为NR-U小区，则终端按照候选目标小区的优先级和/或信道质量选择待切换的目标小区。
可选的，终端也可以按照预定义的规则优先使用NR-U小区或者NR小区作为待切换的目标小区。
图8为本申请实施例提供的切换方法的流程示意图五，如图8所示，所述切换方法包括以下步骤：
步骤801：终端重新选择待切换的目标小区。
进一步，终端在满足第二条件的情况下，重新选择待切换的目标小区。其中，所述第二条件包括以下至少之一：当前选择的目标小区为第二类候选目标小区，所述第二类候选目标小区是指非授权频谱上的小区；目标基站执行LBT失败；目标小区不在MCOT内；其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的候选目标小区；其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的第一类候选目标小区；存在特定第一类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；存在特定第二类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；存在特定候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试。
本申请实施例中，在满足第二条件时，终端在当前选择的目标小区上不执行切换过程，或者不继续执行切换过程，而是重新选择待切换的目标小区。
这里，终端重新选择待切换的目标小区时，可以基于候选目标小区的信道质量和/或优先级，从满足所述切换条件的其他候选目标小区中选择待切换的目标小区。
在一实施方式中，终端在当前选择的目标小区上开始执行切换过程时，如果第二条件满足，则终端在当前选择的目标小区上不执行切换过程。
在另一实施方式中，终端在当前选择的目标小区上开始执行切换过程时，第二条件不满足；终端在当前选择的目标小区上执行切换过程中，如果第二条件满足，则终端在当前选择的目标小区上不继续执行切换过程。
本申请实施例的技术方案，终端在满足第二条件时重新选择待切换的目标小区，从而避免了目标小区是NR-U小区的情况下，由于LBT失败导致的切换时延。
图9为本申请实施例提供的切换方法的流程示意图六，如图9所示，所述切换方法包括以下步骤：
步骤901：源基站选择待切换的目标小区，向该目标小区所在的目标基站发送切换请求消息。
步骤902：目标基站进行切换判决(HO decision)，确定该终端是否可以接入目标小区。
步骤903：若终端可以接入目标小区，目标基站向源基站发送切换请求确认消息。
步骤904：源基站向终端发送切换命令，该切换命令携带多个候选目标小区的配置消息和切换条件。
进一步，所述切换命令还携带多个候选目标小区分别对应的小区类型信息和/或优先级。
这里，小区类型信息可以是NR小区、或LTE小区、或NR-U小区等等。
这里，优先级是指用于小区选择/重选的选择优先级或使用优先级。
步骤905：终端根据切换命令执行切换过程。在满足第二条件时，终端在当前选择的目标切换小区上不执行或不继续执行切换过程，而是重新选择待切换的目标小区。
所述第二条件包括以下至少之一：当前选择的目标小区为NR-U小区、基站执行LBT失败、目标小区不在MCOT内、其他候选目标小区满足切换条件。
进一步，终端可以选择其他候选目标小区中信道质量最好的小区作为待切换的目标小区。
图10为本申请实施例提供的切换装置的结构组成示意图一，该切换装置应用于终端侧，如图10所示，所述切换装置包括：
发送单元1001，用于向源基站发送第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
在一实施方式中，所述发送单元1001，用于在满足第一条件的情况下，向源基站发送第一信息，所述第一条件包括以下至少之一：目标基站执行LBT失败、终端执行切换的时间不在目标基站的MCOT内、在切换过程中。
在一实施方式中，所述装置还包括：
接收单元1002，用于接收所述源基站发送的第一切换命令，所述第一切换命令包括一个目标小区的配置消息。
在一实施方式中，所述装置还包括：
接收单元1002，用于接收所述源基站发送的第二切换命令，所述第二切换命令包括至少一个候选目标小区的配置消息以及切换条件。
本领域技术人员应当理解，本申请实施例的上述切换装置的相关描述可以参照本申请实施例的切换方法的相关描述进行理解。
图11为本申请实施例提供的切换装置的结构组成示意图二，该切换装置应用于源基站侧，如图11所示，所述切换装置包括：
接收单元1101，用于接收终端发送的第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
在一实施方式中，所述第一信息是在第一条件满足的情况下，由所述终端发送给源基站的；其中，所述第一条件包括以下至少之一：目标基站执行LBT失败、终端执行切换的时间不在目标基站的MCOT内、在切换过程中。
在一实施方式中，所述装置还包括：
发送单元1102，用于向所述终端发送第一切换命令，所述第一切换命令包括一个目标小区的配置消息。
在一实施方式中，所述装置还包括：
发送单元1102，用于向所述终端发送第二切换命令，所述第二切换命令包括至少一个候选目标小区的配置消息以及切换条件。
本领域技术人员应当理解，本申请实施例的上述切换装置的相关描述可以参照本申请实施例的切换方法的相关描述进行理解。
图12为本申请实施例提供的切换装置的结构组成示意图三，该切换装置应用于终端侧，如图12所示，所述切换装置包括：
接收单元1201，用于接收源基站发送的第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
在一实施方式中，所述第一信息包括优先级信息；或者，
所述第一信息包括小区类型信息，所述小区类型信息用于指示优先级信息。
在一实施方式中，所述多个候选目标小区包括第一类候选目标小区和/或第二类候选目标小区，所述第一类候选目标小区的优先级不同于所述第二类候选目标小区的优先级，所述第一类候选目标小区是指授权频谱上的小区，所述第二类候选目标小区是指非授权频谱上的小区。
在一实施方式中，所述装置还包括：
排序单元(图中未示意出)，用于执行以下行为至少之一：基于优先级排序所述多个候选目标小区、基于优先级确定切换条件判断的先后顺序、在多个候选目标小区满足切换条件的情况下对满足切换条件的多个候选目标小区进行优先级排序、在满足切换条件的多个候选目标小区中按照优先级顺序选择待切换的目标小区。
在一实施方式中，所述多个候选目标小区中的第一类候选目标小区的优先级高于第二类候选目标小区的优先级。
在一实施方式中，所述装置还包括：
选择单元1202，用于执行以下行为至少之一：在所述多个候选目标小区中优先选择第一类候选目标小区执行切换、优先选择第一类候选目标小区执行切换条件判断、在多个候选目标小区满足切换条件的情况下优先选择满足切换条件的第一类候选目标小区执行切换、在多个候选目标小区满足切换条件的情况下在满足切换条件的多个候选目标小区中优先选择第一类候选目标小区执行切换。
在一实施方式中，所述装置还包括：
选择单元1202，用于如果满足所述切换条件的全部候选目标小区均为第二类候选目标小区，则基于候选目标小区的优先级信息和/或信道质量，从满足所述切换条件的全部候选目标小区中选择待切换的目标小区。
本领域技术人员应当理解，本申请实施例的上述切换装置的相关描述可以参照本申请实施例的切换方法的相关描述进行理解。
图13为本申请实施例提供的切换装置的结构组成示意图四，该切换装置应用于源基站侧，如图13所示，所述切换装置包括：
发送单元1301，用于向终端发送第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
在一实施方式中，所述第一信息包括优先级信息；或者，所述第一信息包括小区类型信息，所述小区类型信息用于指示优先级信息。
在一实施方式中，所述多个候选目标小区包括第一类候选目标小区和/或第二类候选目标小区，所述第一类候选目标小区的优先级不同于所述第二类候选目标小区的优先级，所述第一类候选目标小区是指授权频谱上的小区，所述第二类候选目标小区是指非授权频谱上的小区。
在一实施方式中，所述多个候选目标小区中的第一类候选目标小区的优先级高于第二类候选目标小区的优先级。
本领域技术人员应当理解，本申请实施例的上述切换装置的相关描述可以参照本申请实施例的切换方法的相关描述进行理解。
图14为本申请实施例提供的切换装置的结构组成示意图五，该切换装置应用于终端侧，如图14所示，所述切换装置包括：
选择单元1401，用于在满足第二条件的情况下，重新选择待切换的目标小区；其中，所述第二条件包括以下至少之一：
当前选择的目标小区为第二类候选目标小区，所述第二类候选目标小区是指非授权频谱上的小区；
目标基站执行LBT失败；
目标小区不在MCOT内；
其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的候选目标小区；
其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的第一类候选目标小区；
存在特定第一类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
存在特定第二类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
存在特定候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试。
在一实施方式中，所述装置还包括：
接收单元1402，用于接收源基站发送的第二切换命令，所述第二切换命令包括多个候选目标小区的配置消息以及切换条件。
在一实施方式中，所述选择单元1401，用于基于候选目标小区的信道质量和/或优先级，从满足所述切换条件的其他候选目标小区中选择待切换的目标小区。
本领域技术人员应当理解，本申请实施例的上述切换装置的相关描述可以参照本申请实施例的切换方法的相关描述进行理解。
图15是本申请实施例提供的一种通信设备1500示意性结构图。该通信设备可以是终端，也可以是网络设备(如源基站)，图15所示的通信设备1500包括处理器1510，处理器1510可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图15所示，通信设备1500还可以包括存储器1520。其中，处理器1510可以从存储器1520中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器1520可以是独立于处理器1510的一个单独的器件，也可以集成在处理器1510中。
可选地，如图15所示，通信设备1500还可以包括收发器1530，处理器1510可以控制该收发器1530与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器1530可以包括发射机和接收机。收发器1530还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备1500具体可为本申请实施例的网络设备，并且该通信设备1500可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该通信设备1500具体可为本申请实施例的移动终端/终端，并且该通信设备1500可以实现本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
图16是本申请实施例的芯片的示意性结构图。图16所示的芯片1600包括处理器1610，处理器1610可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图16所示，芯片1600还可以包括存储器1620。其中，处理器1610可以从存储器1620中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器1620可以是独立于处理器1610的一个单独的器件，也可以集成在处理器1610中。
可选地，该芯片1600还可以包括输入接口1630。其中，处理器1610可以控制该输入接口1630与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片1600还可以包括输出接口1640。其中，处理器1610可以控制该输出接口1640与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的网络设备，并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该芯片可应用于本申请实施例中的移动终端/终端，并且该芯片可以实现本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
图17是本申请实施例提供的一种通信系统1700的示意性框图。如图17所示，该通信系统1700包括终端1710和网络设备1720。
其中，该终端1710可以用于实现上述方法中由终端实现的相应的功能，以及该网络设备1720可以用于实现上述方法中由网络设备实现的相应的功能为了简洁，在此不再赘述。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器 (Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本申请实施例中的网络设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机可读存储介质可应用于本申请实施例中的移动终端/终端，并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本申请实施例中的网络设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序产品可应用于本申请实施例中的移动终端/终端，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本申请实施例中的网络设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序可应用于本申请实施例中的移动终端/终端，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，)ROM、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (54)

  1. 一种切换方法，所述方法包括：
    终端向源基站发送第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
  2. 根据权利要求1所述的方法，其中，所述终端向源基站发送第一信息，包括：
    终端在满足第一条件的情况下，向源基站发送第一信息，所述第一条件包括以下至少之一：目标基站执行先侦听后传输LBT失败、终端执行切换的时间不在目标基站的最大信道占用时间MCOT内、在切换过程中。
  3. 根据权利要求1或2所述的方法，其中，所述方法还包括：
    所述终端接收所述源基站发送的第一切换命令，所述第一切换命令包括一个目标小区的配置消息。
  4. 根据权利要求1或2所述的方法，其中，所述方法还包括：
    所述终端接收所述源基站发送的第二切换命令，所述第二切换命令包括至少一个候选目标小区的配置消息以及切换条件。
  5. 一种切换方法，所述方法包括：
    源基站接收终端发送的第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
  6. 根据权利要求5所述的方法，其中，所述第一信息是在第一条件满足的情况下，由所述终端发送给所述源基站的；其中，所述第一条件包括以下至少之一：目标基站执行LBT失败、终端执行切换的时间不在目标基站的MCOT内、在切换过程中。
  7. 根据权利要求5或6所述的方法，其中，所述方法还包括：
    所述源基站向所述终端发送第一切换命令，所述第一切换命令包括一个目标小区的配置消息。
  8. 根据权利要求5或6所述的方法，其中，所述方法还包括：
    所述源基站向所述终端发送第二切换命令，所述第二切换命令包括至少一个候选目标小区的配置消息以及切换条件。
  9. 一种切换方法，所述方法包括：
    终端接收源基站发送的第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
    其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
  10. 根据权利要求9所述的方法，其中，
    所述第一信息包括优先级信息；或者，
    所述第一信息包括小区类型信息，所述小区类型信息用于指示优先级信息。
  11. 根据权利要求9或10所述的方法，其中，所述多个候选目标小区包括第一类候选目标小区和/或第二类候选目标小区，所述第一类候选目标小区的优先级不同于所述第二类候选目标小区的优先级，所述第一类候选目标小区是指授权频谱上的小区，所述第二类候选目标小区是指非授权频谱上的小区。
  12. 根据权利要求9至11中任一项所述的方法，其中，所述方法还包括：
    所述终端执行以下行为至少之一：基于优先级排序所述多个候选目标小区、基于优先级确定切换条件判断的先后顺序、在多个候选目标小区满足切换条件的情况下对满足切换条件的多个候选目标小区进行优先级排序、在满足切换条件的多个候选目标小区中按照优先级顺序选择待切换的目标小区。
  13. 根据权利要求9至12中任一项所述的方法，其中，所述多个候选目标小区中的第一类候选目标小区的优先级高于第二类候选目标小区的优先级。
  14. 根据权利要求13所述的方法，其中，所述方法还包括：
    所述终端执行以下行为至少之一：在所述多个候选目标小区中优先选择第一类候选目标小区执行切换、优先选择第一类候选目标小区执行切换条件判断、在多个候选目标小区满足切换条件 的情况下优先选择满足切换条件的第一类候选目标小区执行切换、在多个候选目标小区满足切换条件的情况下在满足切换条件的多个候选目标小区中优先选择第一类候选目标小区执行切换。
  15. 根据权利要求13所述的方法，其中，所述方法还包括：
    如果满足所述切换条件的全部候选目标小区均为第二类候选目标小区，则所述终端基于候选目标小区的优先级信息和/或信道质量，从满足所述切换条件的全部候选目标小区中选择待切换的目标小区。
  16. 一种切换方法，所述方法包括：
    源基站向终端发送第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
    其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
  17. 根据权利要求16所述的方法，其中，
    所述第一信息包括优先级信息；或者，
    所述第一信息包括小区类型信息，所述小区类型信息用于指示优先级信息。
  18. 根据权利要求16或17所述的方法，其中，所述多个候选目标小区包括第一类候选目标小区和/或第二类候选目标小区，所述第一类候选目标小区的优先级不同于所述第二类候选目标小区的优先级，所述第一类候选目标小区是指授权频谱上的小区，所述第二类候选目标小区是指非授权频谱上的小区。
  19. 根据权利要求18所述的方法，其中，所述多个候选目标小区中的第一类候选目标小区的优先级高于第二类候选目标小区的优先级。
  20. 一种切换方法，所述方法包括：
    终端在满足第二条件的情况下，重新选择待切换的目标小区；其中，所述第二条件包括以下至少之一：
    当前选择的目标小区为第二类候选目标小区，所述第二类候选目标小区是指非授权频谱上的小区；
    目标基站执行LBT失败；
    目标小区不在MCOT内；
    其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的候选目标小区；
    其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的第一类候选目标小区；
    存在特定第一类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
    存在特定第二类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
    存在特定候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试。
  21. 根据权利要求20所述的方法，其中，所述方法还包括：
    所述终端接收源基站发送的第二切换命令，所述第二切换命令包括多个候选目标小区的配置消息以及切换条件。
  22. 根据权利要求20或21所述的方法，其中，所述重新选择待切换的目标小区，包括：
    所述终端基于候选目标小区的信道质量和/或优先级，从满足所述切换条件的其他候选目标小区中选择待切换的目标小区。
  23. 一种切换装置，所述装置包括：
    发送单元，用于向源基站发送第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
  24. 根据权利要求23所述的装置，其中，所述发送单元，用于在满足第一条件的情况下，向源基站发送第一信息，所述第一条件包括以下至少之一：目标基站执行LBT失败、终端执行切换的时间不在目标基站的MCOT内、在切换过程中。
  25. 根据权利要求23或24所述的装置，其中，所述装置还包括：
    接收单元，用于接收所述源基站发送的第一切换命令，所述第一切换命令包括一个目标小区 的配置消息。
  26. 根据权利要求23或24所述的装置，其中，所述装置还包括：
    接收单元，用于接收所述源基站发送的第二切换命令，所述第二切换命令包括至少一个候选目标小区的配置消息以及切换条件。
  27. 一种切换装置，所述装置包括：
    接收单元，用于接收终端发送的第一信息，所述第一信息用于指示所述源基站重新选择待切换的目标小区。
  28. 根据权利要求27所述的装置，其中，所述第一信息是在第一条件满足的情况下，由所述终端发送给源基站的；其中，所述第一条件包括以下至少之一：目标基站执行LBT失败、终端执行切换的时间不在目标基站的MCOT内、在切换过程中。
  29. 根据权利要求27或28所述的装置，其中，所述装置还包括：
    发送单元，用于向所述终端发送第一切换命令，所述第一切换命令包括一个目标小区的配置消息。
  30. 根据权利要求27或28所述的装置，其中，所述装置还包括：
    发送单元，用于向所述终端发送第二切换命令，所述第二切换命令包括至少一个候选目标小区的配置消息以及切换条件。
  31. 一种切换装置，所述装置包括：
    接收单元，用于接收源基站发送的第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
    其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
  32. 根据权利要求31所述的装置，其中，
    所述第一信息包括优先级信息；或者，
    所述第一信息包括小区类型信息，所述小区类型信息用于指示优先级信息。
  33. 根据权利要求31或32所述的装置，其中，所述多个候选目标小区包括第一类候选目标小区和/或第二类候选目标小区，所述第一类候选目标小区的优先级不同于所述第二类候选目标小区的优先级，所述第一类候选目标小区是指授权频谱上的小区，所述第二类候选目标小区是指非授权频谱上的小区。
  34. 根据权利要求31至33中任一项所述的装置，其中，所述装置还包括：
    排序单元，用于执行以下行为至少之一：基于优先级排序所述多个候选目标小区、基于优先级确定切换条件判断的先后顺序、在多个候选目标小区满足切换条件的情况下对满足切换条件的多个候选目标小区进行优先级排序、在满足切换条件的多个候选目标小区中按照优先级顺序选择待切换的目标小区。
  35. 根据权利要求31至34中任一项所述的装置，其中，所述多个候选目标小区中的第一类候选目标小区的优先级高于第二类候选目标小区的优先级。
  36. 根据权利要求35所述的装置，其中，所述装置还包括：
    选择单元，用于执行以下行为至少之一：在所述多个候选目标小区中优先选择第一类候选目标小区执行切换、优先选择第一类候选目标小区执行切换条件判断、在多个候选目标小区满足切换条件的情况下优先选择满足切换条件的第一类候选目标小区执行切换、在多个候选目标小区满足切换条件的情况下在满足切换条件的多个候选目标小区中优先选择第一类候选目标小区执行切换。
  37. 根据权利要求36所述的装置，其中，所述装置还包括：
    选择单元，用于如果满足所述切换条件的全部候选目标小区均为第二类候选目标小区，则基于候选目标小区的优先级信息和/或信道质量，从满足所述切换条件的全部候选目标小区中选择待切换的目标小区。
  38. 一种切换装置，所述装置包括：
    发送单元，用于向终端发送第二切换命令，所述第二切换命令用于所述终端基于切换条件从多个候选目标小区中选择出待切换的目标小区；
    其中，所述第二切换命令携带第一信息，所述第一信息用于指示所述多个候选目标小区分别对应的优先级信息。
  39. 根据权利要求38所述的装置，其中，
    所述第一信息包括优先级信息；或者，
    所述第一信息包括小区类型信息，所述小区类型信息用于指示优先级信息。
  40. 根据权利要求38或39所述的装置，其中，所述多个候选目标小区包括第一类候选目标小区和/或第二类候选目标小区，所述第一类候选目标小区的优先级不同于所述第二类候选目标小区的优先级，所述第一类候选目标小区是指授权频谱上的小区，所述第二类候选目标小区是指非授权频谱上的小区。
  41. 根据权利要求38至40中任一项所述的装置，其中，所述多个候选目标小区中的第一类候选目标小区的优先级高于第二类候选目标小区的优先级。
  42. 一种切换装置，所述装置包括：
    选择单元，用于在满足第二条件的情况下，重新选择待切换的目标小区；其中，所述第二条件包括以下至少之一：
    当前选择的目标小区为第二类候选目标小区，所述第二类候选目标小区是指非授权频谱上的小区；
    目标基站执行LBT失败；
    目标小区不在MCOT内；
    其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的候选目标小区；
    其他候选目标小区满足切换条件，所述其他候选目标小区是指当前选择的目标小区以外的第一类候选目标小区；
    存在特定第一类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
    存在特定第二类候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试；
    存在特定候选目标小区，所述特定指以下中的至少之一：未满足切换条件，未判断过切换条件，未执行切换尝试。
  43. 根据权利要求42所述的装置，其中，所述装置还包括：
    接收单元，用于接收源基站发送的第二切换命令，所述第二切换命令包括多个候选目标小区的配置消息以及切换条件。
  44. [根据细则26改正25.06.2019]　
    根据权利要求42或43所述的装置，其中，所述选择单元，用于基于候选目标小区的信道质量和/或优先级，从满足所述切换条件的其他候选目标小区中选择待切换的目标小区。
  45. 一种终端，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1至4中任一项所述的方法，或者权利要求9至15中任一项所述的方法，或者权利要求20至22中任一项所述的方法。
  46. 一种网络设备，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求5至8中任一项所述的方法，或者权利要求16至19中任一项所述的方法。
  47. 一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至4中任一项所述的方法，或者权利要求9至15中任一项所述的方法，或者权利要求20至22中任一项所述的方法。
  48. 一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求5至8中任一项所述的方法，或者权利要求16至19中任一项所述的方法。
  49. 一种计算机可读存储介质，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1至4中任一项所述的方法，或者权利要求9至15中任一项所述的方法，或者权利要求20至22中任一项所述的方法。
  50. 一种计算机可读存储介质，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求5至8中任一项所述的方法，或者权利要求16至19中任一项所述的方法。
  51. 一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至4中任一项所述的方法，或者权利要求9至15中任一项所述的方法，或者权利要求20至22中任一项所述的方法。
  52. 一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如权利 要求5至8中任一项所述的方法，或者权利要求16至19中任一项所述的方法。
  53. 一种计算机程序，所述计算机程序使得计算机执行如权利要求1至4中任一项所述的方法，或者权利要求9至15中任一项所述的方法，或者权利要求20至22中任一项所述的方法。
  54. 一种计算机程序，所述计算机程序使得计算机执行如权利要求5至8中任一项所述的方法，或者权利要求16至19中任一项所述的方法。
PCT/CN2019/080593 2019-03-29 2019-03-29 一种切换方法及装置、终端、网络设备 WO2020199003A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980064851.3A CN112789895B (zh) 2019-03-29 2019-03-29 一种切换方法及装置、终端、网络设备
PCT/CN2019/080593 WO2020199003A1 (zh) 2019-03-29 2019-03-29 一种切换方法及装置、终端、网络设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/080593 WO2020199003A1 (zh) 2019-03-29 2019-03-29 一种切换方法及装置、终端、网络设备

Publications (1)

Publication Number Publication Date
WO2020199003A1 true WO2020199003A1 (zh) 2020-10-08

Family

ID=72664801

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/080593 WO2020199003A1 (zh) 2019-03-29 2019-03-29 一种切换方法及装置、终端、网络设备

Country Status (2)

Country Link
CN (1) CN112789895B (zh)
WO (1) WO2020199003A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114727342A (zh) * 2021-01-06 2022-07-08 展讯通信（上海）有限公司 切换处理方法与装置、终端、网络设备和存储介质

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117528664A (zh) * 2022-07-27 2024-02-06 大唐移动通信设备有限公司 候选小区的确定方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101505514A (zh) * 2008-02-04 2009-08-12 华为技术有限公司 切换失败的处理方法、检测切换成功的方法和装置
CN108476532A (zh) * 2016-02-02 2018-08-31 英特尔Ip公司 随机接入过程期间的先听后说(lbt)失败
WO2018184022A1 (en) * 2017-03-31 2018-10-04 Intel IP Corporation Maximum channel occupancy time sharing and co-existence
CN109076373A (zh) * 2016-04-11 2018-12-21 瑞典爱立信有限公司 基于lbt参数控制测量的方法
CN109392031A (zh) * 2017-08-04 2019-02-26 北京佰才邦技术有限公司 一种小区切换方法、终端设备及原基站

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104581845B (zh) * 2015-02-15 2018-03-27 南京邮电大学 一种5g系统中基于成簇的超密集小网络移动性管理办法
GB2550200B (en) * 2016-05-13 2021-08-04 Tcl Communication Ltd Methods and devices for supporting access to unlicensed radio resources in wireless communication systems
WO2019237360A1 (zh) * 2018-06-15 2019-12-19 北京小米移动软件有限公司 确定上下行切换点的方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101505514A (zh) * 2008-02-04 2009-08-12 华为技术有限公司 切换失败的处理方法、检测切换成功的方法和装置
CN108476532A (zh) * 2016-02-02 2018-08-31 英特尔Ip公司 随机接入过程期间的先听后说(lbt)失败
CN109076373A (zh) * 2016-04-11 2018-12-21 瑞典爱立信有限公司 基于lbt参数控制测量的方法
WO2018184022A1 (en) * 2017-03-31 2018-10-04 Intel IP Corporation Maximum channel occupancy time sharing and co-existence
CN109392031A (zh) * 2017-08-04 2019-02-26 北京佰才邦技术有限公司 一种小区切换方法、终端设备及原基站

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114727342A (zh) * 2021-01-06 2022-07-08 展讯通信（上海）有限公司 切换处理方法与装置、终端、网络设备和存储介质

Also Published As

Publication number Publication date
CN112789895B (zh) 2023-12-22
CN112789895A (zh) 2021-05-11

Similar Documents

Publication Publication Date Title
US11184886B2 (en) Method, base station, and user equipment for implementing carrier aggregation
WO2020191769A1 (zh) 传输侧行信道的方法和终端设备
WO2020164016A1 (zh) 小区切换的方法和设备
WO2021134863A1 (zh) 选择资源的方法及设备
WO2021092860A1 (zh) 一种小区配置方法及装置、终端设备、网络设备
WO2020020332A1 (zh) 一种随机接入方法、终端设备及存储介质
WO2019242452A1 (zh) 用于物理随机接入信道传输的信道接入方法、装置和程序
WO2019237763A1 (zh) 一种rlf的处理方法及装置、通信设备
WO2020258331A1 (zh) 一种测量间隔的配置方法及装置、终端、网络设备
WO2019242712A1 (zh) 一种能力交互方法及相关设备
WO2020061931A1 (zh) 一种切换上报的方法、终端设备及网络设备
WO2020155070A1 (zh) 用于切换网络设备的方法和终端设备
WO2019242419A1 (zh) 一种bwp切换方法及装置、终端设备
WO2019237805A1 (zh) 一种随机接入方法及装置、通信设备
WO2021026891A1 (zh) 传输侧行数据的方法、终端设备和网络设备
WO2020232611A1 (zh) 一种小区重选方法及装置、终端
WO2020199003A1 (zh) 一种切换方法及装置、终端、网络设备
WO2020056587A1 (zh) 一种切换处理方法、终端设备及网络设备
WO2020051919A1 (zh) 一种资源确定及配置方法、装置、终端、网络设备
WO2020061962A1 (zh) 一种切换定时方法、终端设备及网络设备
WO2020029086A1 (zh) 一种小区搜索方法及装置、终端
WO2020147049A1 (zh) 处理上行覆盖弱化的方法及装置、终端、网络设备
WO2019242382A1 (zh) 一种指示信道接入类型的方法、终端设备及网络设备
WO2023010441A1 (zh) 通信方法、终端设备、网络设备及通信系统
US11516726B2 (en) Data transmission method, terminal device and network device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19923629

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19923629

Country of ref document: EP

Kind code of ref document: A1