WO2021003619A1 - 一种条件切换指示方法、终端设备、源基站及存储介质 - Google Patents

一种条件切换指示方法、终端设备、源基站及存储介质 Download PDF

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Publication number
WO2021003619A1
WO2021003619A1 PCT/CN2019/094940 CN2019094940W WO2021003619A1 WO 2021003619 A1 WO2021003619 A1 WO 2021003619A1 CN 2019094940 W CN2019094940 W CN 2019094940W WO 2021003619 A1 WO2021003619 A1 WO 2021003619A1
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WIPO (PCT)
Prior art keywords
base station
indication
indication information
source base
rrc message
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PCT/CN2019/094940
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English (en)
French (fr)
Inventor
尤心
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Oppo广东移动通信有限公司
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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 PCT/CN2019/094940 priority Critical patent/WO2021003619A1/zh
Priority to CN201980094812.8A priority patent/CN113647144B/zh
Publication of WO2021003619A1 publication Critical patent/WO2021003619A1/zh

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

Definitions

  • the present invention relates to mobile communication technology, in particular to a conditional switching indication method, terminal equipment, source base station and storage medium.
  • the source base station that provides wireless resources for the terminal device can send the handover condition of the handoverable target cell to the terminal device.
  • the terminal device performs handover to the target base station to which the target cell belongs.
  • how to ensure the normal switching of terminal equipment is a problem to be solved.
  • embodiments of the present invention provide a conditional switching instruction method, terminal equipment, source base station, and storage medium, which can ensure normal switching of terminal equipment.
  • an embodiment of the present invention provides a conditional switching indication method, including:
  • the terminal device receives the radio resource control (Radio Resource Control, RRC) message sent by the source base station;
  • RRC Radio Resource Control
  • the terminal device determines to retain the current configuration information of the source base station or not to retain the current configuration information of the source base station according to the first indication information indicated by the RRC message.
  • an embodiment of the present invention provides a conditional switching indication method, including:
  • An RRC message sent by a source base station to a terminal device the RRC message indicates first indication information, and the first indication information is used by the terminal device to determine whether to retain the current configuration information of the source base station or not to retain the current configuration information of the source base station Configuration information.
  • an embodiment of the present invention provides a terminal device, including:
  • the receiving unit is configured to receive the RRC message sent by the source base station;
  • the determining unit is configured to determine whether to retain the current configuration information of the source base station or not to retain the current configuration information of the source base station according to the first indication information indicated by the RRC message.
  • an embodiment of the present invention provides a source base station, including:
  • the sending unit is configured to send an RRC message to a terminal device; the RRC message indicates first indication information, and the first indication information is used by the terminal device to determine whether to retain the current configuration information of the source base station or not to retain the source Current configuration information of the base station.
  • an embodiment of the present invention provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above-mentioned terminal when the computer program is running. The steps of the method of conditional switching instructions performed by the device.
  • an embodiment of the present invention provides a source base station, including a processor and a memory configured to store a computer program that can run on the processor, where the processor is configured to execute the source The steps of the conditional switching instruction method performed by the base station.
  • an embodiment of the present invention provides a storage medium that stores an executable program, and when the executable program is executed by a processor, it implements the condition switching instruction method executed by the terminal device.
  • an embodiment of the present invention provides a storage medium that stores an executable program, and when the executable program is executed by a processor, it implements the conditional switching instruction method executed by the source base station.
  • the conditional switching indication method provided by the embodiment of the present invention includes: a terminal device receives an RRC message sent by a source base station; the terminal device determines to retain the current configuration information of the source base station according to the first indication information indicated by the RRC message or The current configuration information of the source base station is not retained.
  • the first indication information indicated by the RRC message indicates the behavior of the terminal device, determines whether to retain the current configuration information of the source base station, avoids the occurrence of the situation that the source base station configuration information used for the handover is deleted when the handover condition is met, and guarantees The normal execution of the handover.
  • Fig. 1 is a schematic diagram of an optional processing flow of handover according to the present invention
  • Fig. 2 is a schematic diagram of an optional processing flow of condition switching according to the present invention.
  • FIG. 3 is a schematic diagram of an optional composition structure of a communication system according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an optional processing flow of a handover indication method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an optional processing flow of a handover indication method according to an embodiment of the present invention.
  • Figure 6 is a schematic diagram of an X2 interface and an S1 interface according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an optional processing flow of a handover indication method according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an optional processing flow of a handover indication method according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of an optional processing flow of a handover indication method according to an embodiment of the present invention.
  • FIG. 10 is an optional structural diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of an optional structure of a source base station according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of an optional structure of an electronic device provided by an embodiment of the present invention.
  • the communication link between the terminal equipment and the original cell is transferred to the new cell.
  • the original cell may also be called the source cell
  • the base station to which the source cell belongs is called the source base station
  • the new cell is also called the target cell
  • the base station to which the target cell belongs is called the target base station.
  • Steps 100 to 103 are for the source base station (eNB) to control and evaluate the measurement results of the UE and the base station, and consider the area limitation of the UE to determine whether to initiate a handover.
  • eNB source base station
  • Step 100 The serving gateway provides area restriction information to the source base station.
  • the source eNB obtains roaming restriction information from a mobility management entity (Mobility Management Entity, MME)/Serving Gateway (SGW).
  • MME Mobility Management Entity
  • SGW Serving Gateway
  • Step 101 The source base station sends measurement control to the UE.
  • the source eNB configures the measurement process of the UE according to the roaming restriction information.
  • Step 102 The UE sends a measurement report to the source base station.
  • the UE sends a measurement report (MEASUREMENT REPORT) according to a predetermined rule.
  • Step 103 The source base station makes a handover decision.
  • the source eNB determines whether the UE performs handover according to MEASUREMENT REPORT and Radio Resource Management (Radio Resource Management, RRM) information.
  • RRM Radio Resource Management
  • Step 104 to step 106 are the handover preparation phase, where the handover request is sent and the handover request response is returned, and admission control is performed.
  • Step 104 The source base station sends a handover request to the target base station.
  • the source eNB When the source eNB decides that the UE needs to be handed over, it sends a handover request (HANDOVER REQUEST) message to the target base station (eNB), which contains information necessary for the target eNB to prepare resources for handover, such as the UE’s X2 signaling context reference in the source eNB Information, UE S1 signaling context reference information, Evolved Packet System (EPS) bearer context, target cell identity, etc.
  • the UE X2/UE S1 signaling context allows the target eNB to locate the address of the eNB and the core network ((Evolved Packet Core, EPC).
  • the EPS bearer context includes the radio network layer (RNL) and the transport network layer (Transport). Network Layer (TNL) address information and Quality of Service (QoS) information carried by EPS.
  • RNL radio network layer
  • TNL transport network layer
  • QoS Quality of Service
  • Step 105 The target eNB performs admission control.
  • the target eNB performs admission control according to the received QoS information of the EPS bearer. If the target eNB can allocate the required resources to the UE, the target eNB configures the requested resources and allocates a new cell radio network temporary identifier (Cell Radio Network) to the UE. Network Temporary Identifier, C-RNTI).
  • Cell Radio Network Network Temporary Identifier
  • Step 106 The target base station returns a handover request response to the source base station.
  • the target eNB configures Layer 1/Layer 2 (L1/L2) and sends a handover request response (HANDOVER REQUEST ACKNOWLEDGE) message to the source eNB, which includes the handover command that needs to be sent to the UE and the newly allocated C by the target eNB -RNTI and other possible parameters.
  • This message may also contain the RNL/TNL information of the forwarded data tunnel.
  • Step 107 to step 1011 are the handover execution process, and steps 1012 to step 1018 are the handover completion process. Among them, step 107 to step 1013 are used to provide a mechanism to ensure data lossless during the handover process.
  • Step 107 The source base station issues a handover command to the target base station.
  • the source eNB generates a handover command (HANDOVER COMMAND) and sends it to the UE.
  • the handover command message contains the transparent transmission information unit received from the target eNB, and informs the source eNB of the configuration information of the target eNB in advance to prepare the corresponding resources and functions. .
  • the UE receives the HANDOVER COMMAND of the source base station and performs handover according to the handover command of the source eNB.
  • Step 108 The source base station sends an SNSTATUS TRANSFER message to the target base station.
  • the source eNB sends an SN STATUS TRANSFER message to the target eNB to transmit the uplink packet data convergence protocol sequence number (Packet Data Convergence Protocol, PDCP) SN receiver and downlink PDCP SN transmitter SAE bearer status.
  • PDCP Packet Data Convergence Protocol
  • Step 109 The UE synchronizes with the target base station.
  • the UE After receiving the HANDOVER COMMAND, the UE performs the synchronization process with the target eNB and starts to obtain the uplink timing advance.
  • Step 1010 The target base station responds to synchronization, including uplink allocation and timing advance.
  • Step 1011 After the UE has successfully accessed the target cell, the UE sends a handover confirmation (HANDOVER CONFIRM) message to indicate that the handover process of the UE is completed.
  • the target eNB checks the C-RNTI carried in the message. And from this step, the target eNB can send data to the UE.
  • Step 1012 The target base station sends a path switching request to the MME.
  • the target eNB sends a path switch request (PATH SWITCH REQUEST) message to the MME to confirm that the UE has changed cells.
  • PATH SWITCH REQUEST path switch request
  • Step 1013 The MME sends a user plane update request to the serving gateway.
  • the MME sends a user plane update request (UESR PLANE UPDATE REQUEST) message to the serving gateway to notify the Serving GW that the user plane connection needs to be handed over from the source eNB to the target eNB.
  • UESR PLANE UPDATE REQUEST user plane update request
  • Step 1014 The S-GW switches the downlink path.
  • the user plane switches the downlink path to the target side.
  • the Serving GW sends one or more marked end data packets to the source eNB on the original path, and releases all user plane/TNL resources corresponding to the source eNB.
  • Step 1015 The serving gateway returns a user plane update response (USERSPLANE UPDATE RESPONSE) message to the MME.
  • USERSPLANE UPDATE RESPONSE user plane update response
  • Step 1016 The MME sends a path switching request response message to the target base station.
  • the MME sends an acknowledgement path switch response (ATH SWITCH ACK) message to the target eNB to confirm the path switch (PATH SWITCH) message, and the eNB triggers the release of remote user plane and transport layer resources.
  • ATH SWITCH ACK acknowledgement path switch response
  • PATH SWITCH path switch
  • Step 1017 The target base station sends a UE context release message to the source base station.
  • the target eNB sends a UE context release (UE CONTEXT RELEASE) message to notify the source eNB that the handover process has been successful, and releases the previously occupied resources.
  • UE CONTEXT RELEASE UE context release
  • Step 1018 The source base station releases resources.
  • the source eNB Upon receiving the UE CONTEXT RELEASE message, the source eNB releases the radio control plane resources related to this UE.
  • the messages shown in Figure 1 include Layer 3 (L3) and L1/L2 messages, as shown in Figure 1, which are identified by different lines.
  • the handover method shown in Fig. 1 has a situation where the handover preparation time is too long and the UE is too late to handover.
  • the Conditional Handover shown in FIG. 2 can solve the problem that the handover preparation time shown in FIG. 1 is too long, which causes the UE to switch too late.
  • Step 201 The source eNB and the UE exchange measurement control information and measurement reports.
  • the source eNB configures the UE with measurement control information so that the UE measures the mobility function under the source eNB control connection.
  • the UE sends a measurement report (MEASUREMENT REPORT) according to a predetermined rule.
  • Step 202 The target eNB and the source eNB perform handover preparation.
  • the source eNB determines that there is a possibility of handover in the UE based on the measurement results reported by the UE, it performs handover preparation, sends a request message instructing to obtain the handover condition to the target eNB, and the target base station sends the handover condition of the target base station to the source base station.
  • Step 203 The source eNB sends a handover command carrying handover conditions to the UE.
  • the handover command carries the handover condition sent by the target base station, where the handover condition can be a basis or the like.
  • the handover command may carry the handover conditions of one or more target base stations.
  • Step 204 When the UE meets the handover condition, handover to the target base station.
  • the UE After the UE configures the handover condition of the target base station, it monitors whether the channel quality of the target cell configured in the handover condition meets the corresponding handover condition. If so, the UE switches to the target base station that meets the handover condition and synchronizes with the target base station.
  • the source base station determines the target base station based on the measurement report sent by the UE, and sends a handover request to the target base station. If the target base station replies with a handover request response message, the source base station will generate a handover based on the handover request response message
  • the command (carried on the RRC connection reconfiguration message) is sent to the UE, and the UE synchronizes with the target base station after receiving the handover command.
  • the handover command sent by the source base station contains the handover condition.
  • the UE receives it, it will monitor the channel quality of the configured target cell based on the handover condition.
  • the handover condition of the target base station is met, the UE and the target The base station synchronizes.
  • the source base station configures the handover command for the UE in advance.
  • the UE for the high-speed rail scenario, the UE’s running track is specific.
  • the source base station can allocate the target base station to the UE in advance and include the handover command in the handover command.
  • the UE initiates an access request to the target base station.
  • the terminal device will continuously monitor the channel quality of the configured target cell and determine whether the handover condition is met. During this period, the source base station may send an RRC connection reconfiguration message to the UE. , To update the configuration information of the source base station stored by the UE. Then in this case, when the target cell meets the handover conditions, the configuration information of the target base station in the handover command is issued based on the old configuration information of the source base station, the old configuration information of the source base station is deleted, and the current configuration information is used with The configuration information for the switch is inconsistent, causing the switch to fail.
  • the embodiment of the present invention provides a conditional switching indication method.
  • the conditional switching indication method of the embodiment of the present invention can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, code Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) ) System, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability (Worldwide Interoperability) for Microwave Access, WiMAX) communication system or 5G system, etc.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • Worldwide Interoperability Worldwide Interoperability (Worldwide Interoper
  • the communication system 300 applied in the embodiment of the present invention is shown in FIG. 3.
  • the communication system 300 may include a base station 310, and the base station 310 may be a device that communicates with a terminal device 320 (or called a communication terminal or a terminal).
  • the base station 310 can provide communication coverage for a specific geographic area, and can communicate with terminal devices located in the coverage area.
  • the base station 310 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station ( Evolutional Node B (eNB or eNodeB) may also be a base station (gNB) in an NR/5G system.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • eNB or eNodeB evolved base station
  • gNB base station in an NR/5G system.
  • the communication system 300 may also include: a wireless controller in the Cloud Radio Access Network (CRAN), or a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, and a bridge , Routers, network-side equipment in the 5G network, or network equipment in the future evolution of the Public Land Mobile Network (PLMN), etc.
  • CRAN Cloud Radio Access Network
  • PLMN Public Land Mobile Network
  • the communication system 300 further includes at least one terminal device 320 located within the coverage area of at least one base station 310.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as via 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 device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • PSTN public switched telephone networks
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • a terminal device set to communicate through a wireless interface may be referred to as 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 equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, 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, terminal devices in 5G networks, or terminal devices 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
  • Figure 3 exemplarily shows two base stations and one terminal device.
  • the communication system 300 may include multiple terminal devices and multiple base stations, and the coverage of each base station may include other numbers of terminal devices. This embodiment of the present invention does not limit this.
  • the base station before the switch is called the source base station
  • the base station after the switch is called the target base station, and there may be two or more target base stations.
  • the communication system 300 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 invention.
  • a device with a communication function in the network/system in the embodiment of the present invention may be referred to as a communication device.
  • the communication device may include a base station 310 and a terminal device 320 with communication functions.
  • the base station 310 and the terminal device 320 may be the specific devices described above, which will not be repeated here;
  • the device may also include other devices in the communication system 300, 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 invention.
  • An optional processing procedure of the conditional switching indication method provided by the embodiment of the present invention, as shown in FIG. 4, includes the following steps:
  • Step S401 The source base station sends an RRC message to the terminal device.
  • the RRC message may include a new RRC message, measurement control or handover command.
  • the new RRC message is a user-defined RRC message, and the parameters included in the new RRC message are not subject to any limitation.
  • the source base station and the terminal perform measurement control and measurement report interaction.
  • the source base station determines that the terminal device is likely to be handed over based on the measurement results reported by the terminal device, it executes handover preparation, sends a request message instructing to obtain the handover condition to the target base station, and the target base station sends the handover condition of the target base station to the source base station.
  • the source base station generates a handover command based on the received handover condition.
  • the handover command also carries configuration information of the target base station, and the configuration information of the target base station may include: complete configuration information and differential information configured based on the configuration information of the source base station.
  • the complete configuration information includes all the configuration information
  • the difference information configured based on the configuration information of the source base station is the configuration information of the difference between the full configuration information and the configuration information of the source base station.
  • the configuration information includes: PDCP layer, Radio Link Control (RLC) layer, Media Access Control (MAC) layer, physical layer configuration information, etc.
  • RLC Radio Link Control
  • MAC Media Access Control
  • the source base station sends the new RRC message to the terminal device at a time no later than the source base station sends the handover command to the terminal device.
  • the source base station may indicate the first indication information based on one or more of the measurement control, the new RRC message, and the handover command. Wherein, when the first indication information is indicated through multiple RRC messages, the first indication information received first may be updated based on the first indication information received later.
  • the first indication information indicated by the RRC message is used by the terminal device to determine whether to retain the current configuration information of the source base station or not to retain the current configuration information of the source base station.
  • the first indication information includes reservation and non-reservation. When the first indication information is reserved, the terminal device is instructed to retain the current configuration information of the source base station, and when the first information is not reserved, the terminal device is instructed not to retain the current configuration information of the source base station.
  • the source base station receives a handover condition corresponding to at least one target base station, and the handover command includes a handover condition corresponding to at least one target base station, and the handover condition is used to trigger the terminal device to perform handover to the corresponding target base station.
  • the handover command indicates the first indication information corresponding to different target base stations among the at least two target base stations.
  • the first indication information may be uniformly configured for all target cells, or it may be that different first indication information exists for each target cell.
  • the indication mode for the RRC message to indicate the first indication information includes at least one of the following modes: implicit indication; display indication.
  • the implicit indication indicates that the RRC message does not carry a parameter as the first indication information.
  • the display indication characterizes that the RRC message carries a parameter as the first indication information.
  • the RRC message includes a measurement control or handover command; the measurement control or handover command does not carry a parameter for indicating the first indication information.
  • the implicit indication is explained by taking the RRC message as measurement control as an example.
  • the measurement control carries a parameter indicating the switching type and the indicated type is conditional switching
  • the first indication information can be considered as reserved; when the measurement control carries a parameter indicating the switching type, and the indicated type is non
  • the first indication information is not reserved.
  • the implicit indication is explained by taking the RRC message as a handover command as an example.
  • the first indication information may be considered as reserved, indicating that the configuration information of the source base station is reserved; optionally, when the handover command does not carry the parameter for indicating the first indication information
  • the first indication information may be regarded as not reserved, indicating that the configuration information of the source base station is not to be reserved.
  • the switching command when the switching command carries switching conditions, it means that the current switching is conditional switching, and the first indication information can be regarded as reserved; when the switching command does not carry switching conditions, it means that the current switching is not conditional switching, and it can be regarded as the first indication information. Not reserved.
  • the RRC message when the RRC message indicates the first indication information in a display indication, the RRC message includes a new RRC message, and the new RRC message uses a custom parameter to indicate the first indication information .
  • the custom parameters in the new RRC message may include: source configuration storage parameters, handover type parameters, and so on.
  • the source configuration storage parameter indicates whether to store the configuration information of the source base station.
  • the first indication information indicated is reserved.
  • the switch type parameter indicates whether it is a conditional switch.
  • the switch type parameter indicates that the current switch is a conditional switch
  • the indicated first indication information is reserved.
  • the switch type parameter indicates that the current switch is not a conditional switch, the indicated first indication information is not reserved.
  • the RRC message when the RRC message indicates the first indication information in a display indication, the RRC message includes measurement control; the measurement control uses a custom parameter to indicate the first indication information.
  • User-defined parameters can be reserved parameters or newly added parameters defined in measurement control.
  • the custom parameter indicates whether the first indication information is reserved or not based on different values. For example: when the value of the custom parameter is true (1), the indicated first indication information is reserved, and when the value of the custom parameter is false (0), the indicated first indication information is not reserved.
  • the RRC message when the RRC message indicates the first indication information in a display indication, the RRC message includes a handover command; the handover command uses a custom parameter to indicate the first indication information, Either the handover command uses an execution condition parameter to indicate the first indication information, or the handover command uses a parameter in an RRC connection reconfiguration message to indicate the first indication information.
  • the custom parameter may be a reserved parameter defined in the switching command or a newly added parameter.
  • the custom parameter indicates whether the first indication information is reserved or not based on different values. For example: when the value of the custom parameter is true (1), the indicated first indication information is reserved, and when the value of the custom parameter is false (0), the indicated first indication information is not reserved.
  • the parameters in the RRC connection reconfiguration message indicate that the first indication information is reserved or based on different values. Not Retained. For example: when the value of the parameter in the RRC connection reconfiguration message is true (1), the indicated first indication information is reserved, and when the value of the parameter in the RRC connection reconfiguration message is false (0), the indicated The first instruction information of is not reserved.
  • the parameters in the RRC connection reconfiguration message are full configuration parameters.
  • the full configuration parameter indicates whether the configuration information configured by the target base station is complete configuration information.
  • the first indication information is not reserved.
  • the full configuration parameter indicates that the configuration information configured by the target base station is not complete configuration information
  • the first indication information For reservation.
  • the full configuration parameter indicates whether the first indication information is reserved or not reserved based on different values. For example: when the full configuration parameter is true (1), the indicated first indication information is not reserved; when the full configuration parameter is false (0), the indicated first indication information is reserved.
  • the indication manner of the first indication information indicating the different target base stations in the handover command is the same or different. Take the same indication method of the first indication information indicating different target base stations in the handover command for illustration.
  • the handover command indicates the first indication information corresponding to the target base station 1 and the target base station 2, and the handover command uses custom parameters. Indicate the first indication information of the target base station 1, and indicate the first indication information of the target base station 2 with a custom parameter. Take the different indication modes of the first indication information indicating different target base stations in the handover command as an example for description.
  • the handover command indicates the first indication information corresponding to the target base station 1 and the target base station 2, and the handover command uses custom parameters. Indicate the first indication information of the target base station 1, and indicate the first indication information of the target base station 2 in an implicit indication manner without parameters.
  • the source base station may determine the first indication information based on any one of the following methods, and indicate the first indication information in the RRC message through an implicit indication or a display indication:
  • the source base station sets the first indication information as reserved;
  • the source base station sets the first indication information to not retain
  • the source base station sets the first indication information indicated by the handover command as not reserved;
  • the source base station determines the first indication information according to receiving the second indication information of the target base station.
  • the first indication information is the same as the second indication information
  • the second indication information indicates whether the configuration information sent by the target base station to the source base station is determined based on the current configuration information of the source base station.
  • the second indication information is reserved.
  • the reconfiguration information sent by the target base station to the source base station is not based on the current source base station configuration information Certainly, the second indication information is not to be reserved.
  • Step S402 The terminal device receives the RRC message sent by the source base station.
  • Step S403 The terminal device determines to retain the current configuration information of the source base station or not to retain the current configuration information of the source base station according to the first indication information indicated by the RRC message.
  • the terminal device parses the RRC message received in step S403, and obtains the first indication information according to the RRC message.
  • the first indication information includes: indication to reserve the configuration information of the source base station and non-retention indication to not reserve the configuration information of the source base station.
  • the terminal device determines whether to retain the current configuration information of the source base station or not to retain the current configuration information of the source base station according to the first indication information indicated by the RRC message, including: When an indication information is reserved, the terminal device retains the current configuration information of the source base station; or when the first indication information indicated by the handover command is not reserved, the terminal device does not retain the current configuration information of the source base station Configuration information.
  • the terminal device Taking the RRC message as a handover command, and the handover command uses a custom parameter to indicate the first indication information as an example, if the parameter is true, the terminal device retains the configuration information of the current source base station; otherwise, the terminal device The configuration information of the current source base station is not retained.
  • the handover command uses the full-config parameter (full-config) in the RRC connection reconfiguration message to indicate the first indication information as an example, if the RRC connection reconfiguration message includes full -config, and the full-config is true, then the terminal device does not need to retain the current configuration information of the source base station; otherwise, the terminal device retains the current configuration information of the source base station.
  • full-config full-config parameter
  • that the terminal device retains the current configuration information of the source base station includes: the terminal device saves the current configuration information of the source base station; or the terminal device ignores the received source base station connection via RRC The configuration information sent by the reconfiguration message; or when the terminal device receives the configuration information sent by the source base station through the RRC connection reconfiguration message, it refuses to perform reconfiguration according to the received configuration information.
  • the manner in which the terminal device retains the current configuration information of the source base station may include: saving the current configuration information of the source base station, or not saving the current configuration information of the source base station and maintaining the current configuration information of the source base station unchanged.
  • the current configuration information of the source base station is retained by the terminal device storing the current configuration information of the source base station.
  • the terminal device can execute the RRC connection reconfiguration message after receiving the RRC connection reconfiguration message sent by the source base station in the process of monitoring the channel quality of the configured target cell.
  • the configuration information of the source base station is updated.
  • the terminal device saves the old configuration information of the active base station, and accesses the source base station through the new configuration information of the source base station, and the new configuration information is updated based on the old configuration information.
  • the terminal device ignores the received configuration information sent by the source base station through the RRC connection reconfiguration message to retain the current configuration information of the source base station.
  • the terminal device determines to retain the current configuration information of the source base station and does not save the current configuration information of the source base station, the terminal device receives the RRC connection reconfiguration message sent by the source base station while monitoring the channel quality of the configured target cell After that, the received RRC connection reconfiguration message can be ignored, and the configuration information of the source base station is not updated, so as to maintain the old configuration information of the source base station unchanged.
  • the current configuration information of the source base station is retained by assuming that the terminal device refuses to perform reconfiguration according to the received configuration information.
  • the terminal device determines to retain the current configuration information of the source base station and does not save the current configuration information of the source base station
  • the terminal device receives the RRC connection reconfiguration message sent by the source base station while monitoring the channel quality of the configured target cell Later, the reconfiguration indicated by the RRC connection reconfiguration message may be rejected, and the configuration information of the source base station is not updated, so as to maintain the old configuration information of the source base station unchanged.
  • the reason for rejection may be returned to the source base station.
  • the terminal device after receiving the handover command, performs measurement based on the handover condition of the target cell configured in the handover command. Before at least one target base station meets the corresponding handover condition, the terminal device maintains data transmission and reception with the source base station, including receiving the RRC connection reconfiguration message of the source base station, and reconfiguring the received RRC connection reconfiguration message according to the first indication information To process.
  • the method further includes step S404: the terminal device determines configuration information for performing conditional switching according to the first indication information.
  • the terminal device determines configuration information for performing conditional handover according to the first indication information.
  • the reserved configuration information is used as the configuration information for performing conditional switching; when the first indication information is not reserved, the configuration information carried in the switching command is used as the execution condition Switch configuration information.
  • the terminal device determines according to the first indication information to retain the configuration information of the source base station and the configuration information of the target base station sent based on the handover command to perform handover, or to perform handover based on the configuration information of the target base station sent in the handover command.
  • the configuration information of the target base station sent by the handover command is a check based on the configuration information of the source base station information.
  • conditional handover is configured on the network side
  • the terminal will continue to monitor the channel quality of the configured target cell and determine whether the handover condition is met.
  • the source base station may send an RRC connection reconfiguration message to the terminal device, then
  • the configuration information of the target base station in the handover command is issued based on the configuration information of the old source base station, and the configuration information of the old source base station is deleted, resulting in the current
  • the configuration information of the target base station is inconsistent with the configuration information used for handover.
  • the first indication information indicated by the RRC message indicates the behavior of the terminal device when the handover command is received, and determines whether to retain the current configuration information of the source base station, so as to avoid the situation that the handover condition is met but the user Because the configuration information of the source base station of the handover is deleted, the normal execution of the handover is ensured.
  • the source base station and the target base station in the conditional switching indication method in the embodiment of the present invention can communicate based on the X2 interface or the S1 interface, where the X2 interface and the S1 interface can be as shown in FIG. 6.
  • the X2 interface is a point-to-point interface between two base stations, which realizes the intercommunication between the base stations.
  • the terminal device switches the cell of the target base station from the cell of the source base station, the source base station and the target base station can exchange signaling through the X2 interface to complete the condition switching.
  • the S1 interface is the interface between the core network and the access network, and the access point on the core network side is the MME of the control plane/S-GW of the user plane.
  • the terminal device switches the cell of the target base station from the cell of the source base station, the source base station and the target base station can exchange signaling with the MME through the S1 interface to complete the condition switching.
  • the UE when the communication system is an NR/5G system, the UE can indicate the first indication information through any of the measurement control, new RRC message, and handover command sent by the source base station.
  • Figure 7 is a signaling interaction diagram of the conditional switching indication method in Example 1, including:
  • Step S701 The source gNB and UE exchange measurement control information and measurement reports.
  • step S702 the source gNB makes a conditional switching decision (CHO Decision).
  • Step S703 The source gNB sends a handover request to the target gNB.
  • Step S704 the target gNB executes admission control.
  • Step S705 The target gNB sends a handover request response to the source gNB.
  • Step S706 The source gNB sends a handover command carrying the set indication information to the UE.
  • the handover command is used for conditional handover, and the handover command includes at least one target base station's handover condition and set indication information (ie, custom parameters), where the set indication information is true.
  • set indication information ie, custom parameters
  • Step S707 The UE saves the current configuration information of the source gNB according to the set instruction information.
  • the UE After receiving the handover command, the UE determines whether to save the current configuration information settings of the source gNB based on the newly set indication information in the handover command.
  • the indication information may be a newly added parameter in the reconfiguration message. If the indication information is true, it means that the reconfiguration message sent by the target gNB to the source gNB is determined based on the configuration information of the current UE and the source gNB, and the UE saves the current configuration information of the source gNB.
  • Step S708 the UE monitors the target cell configured by the handover command.
  • the UE If the UE receives the RRC connection reconfiguration message of the source gNB while monitoring the channel quality of the target cell, the UE needs to save the current configuration information of the source gNB, and perform configuration information reconfiguration based on the received RRC connection reconfiguration message.
  • Step S709 When the target base station meets the handover condition, perform handover.
  • the UE continuously monitors the channel quality of the target cell based on the configured handover condition. If a target base station meets the handover condition, the UE will switch with the saved configuration information of the source base station during handover preparation and the reconfiguration message sent by the target base station.
  • Figure 8 is a signaling interaction diagram of the conditional handover indication method in Example 2, including:
  • Step S801 The source gNB and the UE exchange measurement control information and measurement reports.
  • Step S802 the source gNB makes a conditional switching decision (CHO Decision).
  • Step S803 The source gNB sends a handover request to the target gNB.
  • Step S804 the target gNB executes admission control.
  • Step S805 The target gNB sends a handover request response to the source gNB.
  • Step S806 The source gNB sends a handover command carrying full configuration parameters to the UE.
  • the handover command is used for conditional handover, and the handover command includes the handover conditions and full configuration parameters of at least one target base station.
  • the UE determines whether to save the current configuration information of the source gNB based on the indication information in the handover command.
  • the indication information may refer to the full config parameter in the reconfiguration message. If the parameter is configured as true, it indicates that the target gNB sends the reconfiguration information to the source base station.
  • the configuration message is fully configured, so the UE does not need to save the current configuration information of the source gNB when receiving the RRC connection reconfiguration message sent by the source gNB.
  • Step S807 the UE monitors the target cell configured by the handover command.
  • Step S808 the UE receives the RRC connection reconfiguration message of the source gNB.
  • the UE receives the RRC connection reconfiguration message of the source gNB while monitoring the channel quality of the target cell, and performs the reconfiguration of the configuration information based on the received RRC connection reconfiguration message.
  • Step S809 The UE returns an RRC connection reconfiguration complete message to the source gNB.
  • Step S810 When the target base station meets the handover condition, perform handover.
  • the UE continuously monitors the channel quality of the target cell based on the configured handover conditions. If a target base station meets the handover conditions, the UE will use the configuration information of the source base station when preparing for handover (that is, the configuration information updated based on the RRC connection reconfiguration message) and the target cell.
  • the reconfiguration message sent by the base station to switch.
  • Figure 9 is a signaling interaction diagram of the conditional handover indication method in example three, including:
  • Step S901 The source gNB and the UE exchange measurement control information and measurement reports.
  • step S902 the source gNB makes a conditional switching decision (CHO Decision).
  • Step S903 The source gNB sends a handover request to the target gNB.
  • Step S904 the target gNB executes admission control.
  • Step S905 The target gNB sends a handover request response to the source gNB.
  • Step S906 The source gNB sends a handover command carrying full configuration parameters and indication information to the UE.
  • the handover command is used for conditional handover, and the handover command includes the handover condition and full configuration parameters and indication information of at least one target base station.
  • the UE determines whether to save the current configuration information of the source gNB based on the indication information in the handover command and the full config parameter.
  • the full config parameter or indication information can indicate that the UE needs to save the current configuration information of the source gNB.
  • Step S907 the UE monitors the target cell configured by the handover command.
  • Step S908 the UE receives the RRC connection reconfiguration message of the source gNB.
  • the UE receives the RRC connection reconfiguration message of the source gNB during the monitoring of the channel quality of the target cell.
  • the UE can choose to reject the reconfiguration message of the source base station and refuse to perform reconfiguration.
  • Step S909 The UE returns an RRC connection reconfiguration rejection message to the source gNB.
  • the reason for rejection may be carried in the RRC connection reconfiguration rejection message.
  • Step S910 When the target base station meets the handover condition, perform handover.
  • the UE continuously monitors the channel quality of the target cell based on the configured handover conditions. If a target base station meets the handover conditions, the UE will perform the handover based on the configuration information of the source base station and the reconfiguration message sent by the target base station during handover preparation.
  • an embodiment of the present invention also provides a terminal device.
  • the composition structure of the terminal device is shown in FIG. 10, and the terminal device 1000 includes:
  • the receiving unit 1001 is configured to receive the RRC message sent by the source base station;
  • the determining unit 1002 is configured to determine whether to retain the current configuration information of the source base station or not to retain the current configuration information of the source base station according to the first indication information indicated by the RRC message.
  • the RRC message includes: a new RRC message, measurement control or handover command.
  • the indication manner of the RRC message indicating the first indication information includes at least one of the following manners:
  • the RRC message when the RRC message indicates the first indication information in an implicit indication, the RRC message includes a measurement control or handover command, and the RRC message does not carry instructions for indicating the first indication information. Indicates the parameters of the information.
  • the RRC message when the indication mode of the RRC message indicating the first indication information is a display indication, the RRC message includes a new RRC message;
  • the new RRC message uses a custom parameter to indicate the first indication information.
  • the RRC message when the RRC message indicates the indication mode of the first indication information is a display indication, the RRC message includes measurement control;
  • the measurement control uses a custom parameter to indicate the first indication information.
  • the RRC message when the RRC message indicates the indication mode of the first indication information is a display indication, the RRC message includes a handover command;
  • the switching command uses a custom parameter to indicate the first indication information, or
  • the switching command uses an execution condition parameter to indicate the first indication information, or
  • the handover command uses a parameter in a radio resource control RRC connection reconfiguration message to indicate the first indication information.
  • the parameter in the radio resource control RRC connection reconfiguration message is a full configuration parameter.
  • the determining unit 1002 is further configured to:
  • the current configuration information of the source base station is reserved.
  • the current configuration information of the source base station is not reserved.
  • the determining unit 1002 is further configured to:
  • the terminal device further includes:
  • the configuration unit is configured to determine configuration information for performing conditional switching according to the first indication information.
  • the configuration unit is further configured as:
  • the configuration information carried in the handover command is used as the configuration information for performing conditional handover.
  • An embodiment of the present invention also provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned terminal device when the computer program is running.
  • a terminal device including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned terminal device when the computer program is running.
  • Conditional switch instruction method steps including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned terminal device when the computer program is running.
  • the embodiment of the present invention also provides a source base station.
  • the sending unit 1101 is configured to send an RRC message to a terminal device; the RRC message indicates first indication information, and the first indication information is used by the terminal device to determine whether to reserve the current configuration information of the source base station or not to reserve Current configuration information of the source base station.
  • the RRC message includes: a new RRC message, measurement control or handover command.
  • the indication manner of the RRC message indicating the first indication information includes at least one of the following manners:
  • the RRC message when the handover command instructs the first indication information in an implicit indication, includes a measurement control or handover command, and the measurement control or the handover command does not carry instructions for indicating The parameter of the first indication information.
  • the RRC message when the handover command indicates the first indication information in a display indication, the RRC message includes a new RRC message;
  • the new RRC message uses a custom parameter to indicate the first indication information.
  • the RRC message when the handover command indicates that the first indication information is indicated by a display indication, the RRC message includes measurement control;
  • the measurement control uses a custom parameter to indicate the first indication information.
  • the RRC message when the handover command indicates the first indication information in a display indication, the RRC message includes a handover command;
  • the switching command uses a custom parameter to indicate the first indication information
  • the switching command uses an execution condition parameter to indicate the first indication information, or
  • the handover command uses a parameter in the RRC connection reconfiguration message to indicate the first indication information.
  • the parameters in the RRC connection reconfiguration message are full configuration parameters.
  • the source base station further includes: a first setting unit configured to set the first indication information to be reserved when the configuration information of the target base station is determined based on the current configuration information of the source base station.
  • the source base station further includes: a second setting unit configured to set the first indication information to be when no RRC connection reconfiguration message is sent to the terminal device within a set time period Not Retained.
  • the source base station further includes: a third setting unit configured to set the first indication information to not be reserved when the configuration information of the target base station is complete configuration information.
  • the source base station further includes: a third setting unit configured to determine the first indication information according to the second indication information of the receiving target base station.
  • An embodiment of the present invention also provides a source base station, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned source base station when the computer program is running.
  • a source base station including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned source base station when the computer program is running.
  • Conditional switch instruction method steps including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned source base station when the computer program is running.
  • the electronic device 1200 includes: at least one processor 1201, memory 1202, and at least one network interface 1204.
  • the components in the electronic device 1200 are coupled together through the bus system 1205.
  • the bus system 1205 is used to implement connection and communication between these components.
  • the bus system 1205 also includes a power bus, a control bus, and a status signal bus.
  • various buses are marked as the bus system 1205 in FIG. 12.
  • the memory 1202 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory.
  • the non-volatile memory may be ROM, Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), and electrically erasable Programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access memory (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface memory, optical disk, or CD-ROM -ROM, Compact Disc Read-Only Memory); Magnetic surface memory can be disk storage or tape storage.
  • the volatile memory may be random access memory (RAM, Random Access Memory), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • SSRAM synchronous static random access memory
  • DRAM Dynamic Random Access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM enhanced -Type synchronous dynamic random access memory
  • SLDRAM SyncLink Dynamic Random Access Memory
  • direct memory bus random access memory DRRAM, Direct Rambus Random Access Memory
  • DRRAM Direct Rambus Random Access Memory
  • the memory 1202 described in the embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.
  • the memory 1202 in the embodiment of the present invention is used to store various types of data to support the operation of the electronic device 1200. Examples of these data include: any computer program used to operate on the electronic device 1200, such as an application program 12021.
  • the program for implementing the method of the embodiment of the present invention may be included in the application program 12021.
  • the method disclosed in the foregoing embodiment of the present invention may be applied to the processor 1201 or implemented by the processor 1201.
  • the processor 1201 may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method can be completed by hardware integrated logic circuits in the processor 1201 or instructions in the form of software.
  • the aforementioned processor 1201 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like.
  • the processor 1201 may implement or execute various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in the embodiments of the present invention can be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a storage medium, and the storage medium is located in the memory 1202.
  • the processor 1201 reads information in the memory 1202, and completes the steps of the foregoing method in combination with its hardware.
  • the electronic device 1200 may be used by one or more application specific integrated circuits (ASIC, Application Specific Integrated Circuit), DSP, programmable logic device (PLD, Programmable Logic Device), and complex programmable logic device (CPLD). , Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, MPU, or other electronic components to implement the foregoing method.
  • ASIC Application Specific Integrated Circuit
  • DSP digital signal processor
  • PLD programmable logic device
  • CPLD complex programmable logic device
  • FPGA field-programmable Logic Device
  • controller MCU
  • MPU or other electronic components to implement the foregoing method.
  • the embodiment of the present invention also provides a storage medium for storing computer programs.
  • the storage medium can be applied to the terminal device in the embodiment of the present invention, and the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present invention.
  • the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present invention.
  • the storage medium can be applied to the source base station in the embodiment of the present invention, and the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present invention.
  • the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present invention.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

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Abstract

本发明公开了一种条件切换指示方法，包括：终端设备接收源基站发送的RRC消息；所述终端设备根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。本发明还公开了另一种条件切换指示方法、终端设备、源基站及存储介质。

Description

一种条件切换指示方法、终端设备、源基站及存储介质 技术领域
本发明涉及移动通信技术，尤其涉及一种条件切换指示方法、终端设备、源基站及存储介质。
背景技术
相关技术中，为终端设备提供无线资源的源基站可将可切换的目标小区的切换条件发送给终端设备。当目标小区的信道质量满足切换条件时，终端设备向目标小区所属的目标基站进行切换。但是，如何保证终端设备的正常切换是有待解决的问题。
发明内容
为解决上述技术问题，本发明实施例提供一种条件切换指示方法、终端设备、源基站及存储介质，能够保证终端设备的正常切换。
第一方面，本发明实施例提供一种条件切换指示方法，包括：
终端设备接收源基站发送的无线资源控制(Radio Resource Control，RRC)消息；
所述终端设备根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
第二方面，本发明实施例提供一种条件切换指示方法，包括：
源基站向终端设备发送的RRC消息；所述RRC消息指示有第一指示信息，所述第一指示信息用于所述终端设备确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
第三方面，本发明实施例提供一种终端设备，包括：
接收单元，配置为接收源基站发送的RRC消息；
确定单元，配置为根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
第四方面，本发明实施例提供一种源基站，包括：
发送单元，配置为向终端设备发送的RRC消息；所述RRC消息指示有第一指示信 息，所述第一指示信息用于所述终端设备确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
第五方面，本发明实施例提供一种终端设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述终端设备执行的条件切换指示方法的步骤。
第六方面，本发明实施例提供一种源基站，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述源基站执行的条件切换指示方法的步骤。
第七方面，本发明实施例提供一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现上述终端设备执行的条件切换指示方法。
第八方面，本发明实施例提供一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现上述源基站执行的条件切换指示方法。
本发明实施例提供的条件切换指示方法，包括：终端设备接收源基站发送的RRC消息；所述终端设备根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。通过RRC消息指示的第一指示信息指示终端设备的行为，确定是否保留所述源基站当前的配置信息，避免出现切换条件满足时但是用于切换的源基站配置信息被删除的情况的发生，保证了切换的正常执行。
附图说明
图1为本发明切换的一种可选的处理流程示意图；
图2为本发明条件切换的一种可选的处理流程示意图；
图3为本发明实施例通信系统的一种可选的组成结构示意图；
图4为本发明实施例切换指示方法的一种可选的处理流程示意图；
图5为本发明实施例切换指示方法的一种可选的处理流程示意图；
图6为本发明实施例X2接口和S1接口示意图；
图7为本发明实施例切换指示方法的一种可选的处理流程示意图；
图8为本发明实施例切换指示方法的一种可选的处理流程示意图；
图9为本发明实施例切换指示方法的一种可选的处理流程示意图；
图10是本发明实施例提供的终端设备的一个可选的结构示意图；
图11是本发明实施例提供的源基站的一个可选的结构示意图；
图12是本发明实施例提供的电子设备的一个可选的结构示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点和技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
在对本发明实施例提供的切换控制方法进行详细说明之前，先对切换进行简要说明。
在通信系统中，当正在使用网络服务的终端设备如用户设备(User Equipment，UE)从一个小区移动到另一个小区，或由于无线传输业务负荷量调整、激活操作维护、设备故障灯原因，为了保证通信的连续性和服务的质量，将终端设备与原小区的通信链路转移到新的小区上，这个过程就是切换。其中，原小区也可称为源小区，源小区所属的基站称为源基站，新的小区也称为目标小区，目标小区所属的基站称为目标基站。
以通信系统为LTE系统为例，UE在LTE系统内的切换过程如图1所示。
步骤100-步骤103为源基站(eNB)控制并评估UE和基站的测量结果，并考虑UE的区域限制情况，判定是否发起切换。
步骤100，服务网关向源基站提供区域限制信息。
对于连接状态的UE，在连接建立阶段或者在最后的定时提前(TA)更新阶段，源eNB从移动性管理实体(Mobility Management Entity，MME)/服务网关(Serving Gateway，SGW)漫游限制信息。
步骤101，源基站向UE发送测量控制。
源eNB根据漫游限制信息来配置UE的测量过程。
步骤102，UE向源基站发送测量报告。
UE根据预定的规则发送测量报告(MEASUREMENT REPORT)。
步骤103，源基站进行切换决策。
源eNB根据MEASUREMENT REPORT和无线资源管理(Radio Resource Management，RRM)信息来决定UE是否进行切换。
步骤104-步骤106为切换准备阶段，进行切换请求的发送和切换请求应答的返回，并执行接纳控制。
步骤104，源基站向目标基站发送切换请求。
当源eNB决定UE需要切换时，向目标基站(eNB)发送切换请求(HANDOVER  REQUEST)消息，其中包含在目标eNB为切换准备资源所必须的信息，如UE在源eNB中的X2信令上下文参考信息，UE S1信令上下文参考信息，演进分组系统(Evolved Packet System，EPS)承载上下文以及目标小区的标识等。其中，UE X2/UE S1信令上下文允许目标eNB定位eNB和核心网((Evolved Packet Core，EPC)的地址。EPS承载上下文包括了无线网络层(Radio Network Layer，RNL)和传输网络层(Transport Network Layer，TNL)地址信息和EPS承载的服务质量(Quality of Service，QoS)信息。
步骤105，目标eNB执行接纳控制。
目标eNB根据收到的EPS承载的QoS信息执行接纳控制，如果目标eNB可以向UE分配所需要的资源，则目标eNB配置所请求的资源，并为UE分配新的小区无线网络临时标识(Cell Radio Network Temporary Identifier，C-RNTI)。
步骤106，目标基站向源基站返回切换请求响应。
为了准备切换过程，目标eNB配置层1/层2(L1/L2)并向源eNB发送切换请求响应(HANDOVER REQUEST ACKNOWLEDGE)消息，其中，包括需要发送给UE的切换命令、目标eNB新分配的C-RNTI以及其他可能的参数。这条消息中还可能包含前转数据隧道的RNL/TNL信息。
步骤107-步骤1011为切换执行过程，步骤1012-步骤1018为切换完成过程。其中，步骤107-步骤1013用于提供切换过程中保证数据无损的机制。
步骤107，源基站向目标基站下发切换命令。
源eNB生成一个切换命令(HANDOVER COMMAND)并发送给UE，切换命令消息中包含从目标eNB收到的透明传输的信息单元，将目标eNB的配置信息提前告知源eNB以做相应的资源和功能准备。UE收到源基站的HANDOVER COMMAND并根据源eNB的切换命令进行切换。
步骤108，源基站向目标基站发送SN STATUS TRANSFER消息。
源eNB发送SN STATUS TRANSFER消息给目标eNB，以传送上行链路的分组数据汇聚协议序列号(Packet Data Convergence Protocol，PDCP)SN接受者和下行链路PDCP SN传送者SAE承载的状态。
步骤109，UE与目标基站同步。
接收到HANDOVER COMMAND后，UE进行和目标eNB的同步过程，并启动获得上行定时提前。
步骤1010，目标基站对同步进行响应，包括上行分配和定时提前。
步骤1011，当UE已经成功接入目标小区后，UE发送切换确认(HANDOVER CONFIRM)消息指示UE的切换过程完成。目标eNB对消息携带的C-RNTI进行校验。并且从这一步开始，目标eNB能够向UE发送数据。
步骤1012，目标基站向MME发送路径切换请求。
目标eNB发送路径切换请求(PATH SWITCH REQUEST)消息给MME，以确认UE已经变换了小区。
步骤1013，MME向服务网关发送用户平面更新请求。
MME向服务网关发送用户平面更新请求(UESR PLANE UPDATE REQUEST)消息，通知Serving GW用户平面的连接需要从源eNB切换到目标eNB。
步骤1014，S-GW切换下行路径。
用户平面切换下行路径到目标侧。Serving GW在原有路径上向源eNB发送一个或者多个标记结束的数据包，并释放所有对应源eNB的用户平面/TNL资源。
步骤1015，服务网关向MME返回用户平面更新响应(USERSPLANE UPDATE RESPONSE)消息。
步骤1016，MME向目标基站发送路径切换请求应答消息。
MME向目标eNB发送确认路径切换应答(ATH SWITCH ACK)消息，以确认路径切换(PATH SWITCH)消息，eNB触发释放远侧的用户平面和传输层资源。
步骤1017，目标基站向源基站发送释放UE上下文消息。
目标eNB发送UE上下文释放(UE CONTEXT RELEASE)消息以通知源eNB切换过程已经成功，并且释放原先占用的资源。
步骤1018，源基站释放资源。
一旦收到UE CONTEXT RELEASE消息，源eNB释放与这个UE相关的无线控制平面资源。
在图1所示的消息中，包括层3(L3)的和L1/L2的消息，如图1所示，通过不同的线条进行标识。
在UE高速移动或者高频条件的场景下，UE需要频繁的进行切换。图1所示的切换方法存在切换准备时间过长而导致UE要切换的时候已经过晚的情况发生。图2所示的条件切换(Conditional Handover)能够解决图1所示的切换准备时间过长，导致UE要切换的时候已经过晚的问题。
条件切换的方法如图2所示，包括：
步骤201，源eNB与UE之间进行测量控制信息和测量报告的交互。
源eNB向UE配置测量控制信息，使UE测量源eNB控制连接下的移动性功能。UE根据预定的规则发送测量报告(MEASUREMENT REPORT)。
步骤202，目标eNB与源eNB执行切换准备。
当源eNB基于UE上报的测量结果确定UE存在切换的可能时，执行切换准备，向目标eNB发送指示获取切换条件的请求消息，目标基站向源基站发送目标基站的切换条件。
步骤203，源eNB向UE发送携带切换条件的切换命令。
在切换命令中携带目标基站发送的切换条件，其中，切换条件可为根据等。这里，切换命令中可携带一个或多个目标基站的切换条件。
步骤204，当UE满足切换条件时，切换至目标基站。
UE配置了目标基站的切换条件后，监听切换条件中所配置的目标小区的信道质量是否满足对应的切换条件，如果满足，UE切换至满足切换条件对应的目标基站，与目标基站进行同步。
在图1所示的切换中，源基站基于UE发送的测量报告确定目标基站，并且向目标基站发送切换请求，若目标基站回复了切换请求响应消息，源基站会基于该切换请求响应消息生成切换命令(承载在RRC连接重配置消息上)发送给UE，UE收到切换命令后与目标基站进行同步。
在条件切换中，源基站发送的切换命令中包含了切换条件，当UE收到后，会基于切换条件监测所配置的目标小区的信道质量，当目标基站的切换条件满足时，UE才与目标基站进行同步。
在条件切换中，一方面，源基站为UE提前配置切换命令，另一方面，对于高铁场景，UE的运行轨迹是特定的，源基站可以提前把目标基站配给UE，并且在切换命令中包含用于触发UE进行切换的条件，当满足所配条件时，UE向目标基站发起接入请求。
相关技术中的条件切换，若网络侧配置了切换条件，终端设备会持续监听所配置目标小区的信道质量并且判断是否满足切换条件，在这期间，源基站可能会发送RRC连接重配置消息给UE，对UE所存储的源基站的配置信息进行更新。那么在这种情况下，当目标小区满足切换条件时，切换命令中目标基站的配置信息是基于源基站旧的配置信息下发的，源基站旧的配置信息被删除，当前的配置信息与用于切换的配置信息不一致， 导致切换失败。
基于上述问题，本发明实施例提供一种条件切换指示方法，本发明实施例的条件切换指示方法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，本发明实施例应用的通信系统300，如图3所示。该通信系统300可以包括基站310，基站310可以是与终端设备320(或称为通信终端、终端)通信的设备。基站310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设备进行通信。可选地，该基站310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)，还可以是NR/5G系统中的基站(gNB)。
通信系统300还可包括：云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者移动交换中心、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300还包括位于至少一个基站310覆盖范围内的至少一个终端设备320。作为在此使用的“终端设备”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/或另一终端设备的被设置成接收/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设备可以被称为“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。终端设备可以指接入终端、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网络中的终端设备或者未来演进的PLMN中的终端设备等。
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3示例性地示出了两个基站和一个终端设备，可选地，该通信系统300可以包括多个终端设备以及多个基站，并且每个基站的覆盖范围内可以包括其它数量的终端设备，本发明实施例对此不做限定。
当终端设备从一个基站切换至另一个基站时，将切换之前的基站称为源基站，切换之后的基站称为目标基站，目标基站可以为两个或多个。
可选地，该通信系统300还可以包括网络控制器、移动管理实体等其他网络实体，本发明实施例对此不作限定。
应理解，本发明实施例中网络/系统中具有通信功能的设备可称为通信设备。以图3示出的通信系统300为例，通信设备可包括具有通信功能的基站310和终端设备320，基站310和终端设备320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300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，本发明实施例中对此不做限定。
本发明实施例提供的条件切换指示方法的一种可选处理流程，如图4所示，包括以下步骤：
步骤S401，源基站向终端设备发送RRC消息。
所述RRC消息可包括新的RRC消息、测量控制或切换命令。其中，新的RRC消息为用户自定义的RRC消息，新的RRC消息所包括的参数不进行任何的限定。
源基站与终端之间进行测量控制和测量报告的交互。
当源基站基于终端设备上报的测量结果确定终端设备存在切换的可能时，执行切换准备，向目标基站发送指示获取切换条件的请求消息，目标基站向源基站发送目标基站的切换条件。源基站基于收到的切换条件生成切换命令。这里，切换命令中还携带有目标基站的配置信息，目标基站的配置信息可包括：完整的配置信息和基于源基站的配置信息配置的差分信息。其中，完整的配置信息包括所有的配置信息，基于源基站的配置信息配置的差分信息为全配置信息与源基站的配置信息之间的相差的配置信息。
本发明实施例中，配置信息包括：PDCP层、无线链路层控制协议(Radio Link Control，RLC)层、媒介接入控制(Media Access Control，MAC)层、物理层的配置信息等。
当所述RRC消息为所述新的RRC消息，源基站向终端设备发送所述新的RRC消息的时机不晚于源基站向终端设备发送切换命令。
源基站可基于测量控制、新的RRC消息和切换命令中一个或多个消息来指示第一指示信息。其中，当通过多条RRC消息指示第一指示信息时，可以基于后收到的第一指示信息对先收到的第一指示信息进行更新。
RRC消息指示的第一指示信息用于所述终端设备确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。第一指示信息包括保留和不保留。当第一指示信息为保留，指示终端设备保留源基站当前的配置信息，当第一信息为不保留，指示终端设备不保留源基站当前的配置信息。
可选地，源基站接收到至少一个目标基站对应的切换条件，切换命令中包括有至少一个目标基站对应的切换条件，所述切换条件用于触发终端设备执行切换至对应的目标基站。
可选地，当在切换命令中指示第一指示信息，所述切换命令指示至少两个目标基站中不同目标基站对应的第一指示信息。
在实际应用中，第一指示信息可以是所有目标小区统一配置，也可以是每个目标小区存在不同的第一指示信息。
本发明实施例中，所述RRC消息指示所述第一指示信息的指示方式包括以下方式至少之一：隐式指示；显示指示。隐式指示表征RRC消息中不携带有作为第一指示信息的参数。显示指示表征RRC消息中携带有作为第一指示信息的参数。
当RRC消息中指示所述第一指示信息的指示方式为隐式指示，RRC消息包括测 量控制或切换命令；所述测量控制或切换命令不携带用于指示所述第一指示信息的参数。
以RRC消息为测量控制为例对隐式指示进行说明。可选地，当测量控制中携带指示切换类型的参数，且指示的类型为条件切换时，可认为第一指示信息为保留；当测量控制中携带指示切换类型的参数，且指示的类型为非条件切换时，可认为第一指示信息为不保留。
以RRC消息为切换命令为例对隐式指示进行说明。可选地，当切换命令不携带用于指示第一指示信息的参数时，可认为第一指示信息为保留，指示保留源基站的配置信息；可选地，当切换命令不携带用于指示第一指示信息的参数时，可认为第一指示信息为不保留，指示不保留源基站的配置信息。可选地，当切换命令携带切换条件，表征当前的切换是条件切换，可认为第一指示信息为保留；当切换命令不携带切换条件，表征当前的切换不是条件切换，可认为第一指示信息为不保留。
本发明实施例中，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括新的RRC消息，新的RRC消息使用自定义参数指示所述第一指示信息。
可选地，新的RRC消息中自定义参数可包括：源配置存储参数、切换类型参数等。源配置存储参数表征是否存储源基站的配置信息，当源配置存储参数表征存储源基站的配置信息时，所指示的第一指示信息为保留，当源配置存储参数表征不存储源基站的配置信息时，所指示的第一指示信息为不保留。切换类型参数表征是否为条件切换。当切换类型参数表征当前切换为条件切换，所指示的第一指示信息为保留，当切换类型参数表征当前切换不是条件切换，所指示的第一指示信息为不保留。
本发明实施例中，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括测量控制；所述测量控制使用自定义参数指示所述第一指示信息。自定义参数可为测量控制中定义保留的参数或新增加的参数。自定义参数基于不同的值指示第一指示信息为保留或不保留。比如：当自定义参数的值为true(1)时，所指示的第一指示信息为保留，当自定义的参数的值为false(0)时，所指示的第一指示信息为不保留。
本发明实施例中，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括：切换命令；所述切换命令使用自定义参数指示所述第一指示信息，或所述切换命令使用执行条件参数指示所述第一指示信息，或所述切换命令 使用RRC连接重配置消息中的参数指示所述第一指示信息。
以切换命令使用自定义参数指示所述第一指示信息为例，自定义参数可为切换命令中定义保留的参数或新增加的参数。自定义参数基于不同的值指示第一指示信息为保留或不保留。比如：当自定义参数的值为true(1)时，所指示的第一指示信息为保留，当自定义参数的值为false(0)时，所指示的第一指示信息为不保留。
以切换命令通过RRC连接重配置消息发送并且使用RRC连接重配置消息中的参数指示所述第一指示信息为例，RRC连接重配置消息中的参数基于不同的值指示第一指示信息为保留或不保留。比如：当RRC连接重配置消息中的参数的值为true(1)时，所指示的第一指示信息为保留，当RRC连接重配置消息中的参数的值为false(0)时，所指示的第一指示信息为不保留。
可选地，当切换命令使用RRC连接重配置消息中的参数指示所述第一指示信息，所述RRC连接重配置消息中的参数为全配置参数。其中，全配置参数指示目标基站所配置的配置信息是否为完整的配置信息。当全配置参数指示目标基站所配置的配置信息为完整的配置信息时，第一指示信息为不保留，当全配置参数指示目标基站所配置的配置信息不是完整的配置信息时，第一指示信息为保留。全配置参数基于不同的值分别表示第一指示信息为保留或不保留。比如：当全配置参数为true(1)时，所指示的第一指示信息为不保留；当全配置参数为false(0)时，所指示的第一指示信息为保留。
在本发明实施例中，当切换命令指示不同目标基站对应的第一指示信息，所述切换命令中指示不同目标基站的所述第一指示信息的指示方式相同或不同。以切换命令中指示不同目标基站的所述第一指示信息的指示方式相同为例进行说明，比如：切换命令中指示目标基站1和目标基站2对应的第一指示信息，切换命令以自定义参数指示目标基站1的第一指示信息，并以自定义参数指示目标基站2的第一指示信息。以切换命令中指示不同目标基站的所述第一指示信息的指示方式不同为例进行说明，比如：切换命令中指示目标基站1和目标基站2对应的第一指示信息，切换命令以自定义参数指示目标基站1的第一指示信息，并以不携带参数的隐式指示的方式指示目标基站2的第一指示信息。
源基站可基于以下方式中的任一种确定第一指示信息，并在RRC消息中通过隐式指示或显示指示的方式指示第一指示信息：
当目标基站的配置信息是基于所述源基站当前的配置信息确定的，所述源基站设 置所述第一指示信息为保留；
当在设定的时间段内不再向所述终端设备发送RRC连接重配置消息，所述源基站设置所述第一指示信息为不保留；
当目标基站的配置信息为完整的配置信息时，所述源基站设置所述切换命令指示的第一指示信息为不保留；
所述源基站根据接收目标基站的第二指示信息确定所述第一指示信息。
这里，第一指示信息与第二指示信息相同，第二指示信息指示目标基站发送给源基站的配置信息是否是基于当前源基站的配置信息确定的。当目标基站发送给源基站的重配消信息是基于当前源基站的配置信息确定的，第二指示信息为保留，当目标基站发送给源基站的重配消信息不是基于当前源基站的配置信息确定的，第二指示信息为不保留。
步骤S402，终端设备接收源基站发送的RRC消息。
步骤S403，所述终端设备根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
终端设备对步骤S403接收到的RRC消息进行解析，根据RRC消息得到第一指示信息。
第一指示信息包括：指示保留源基站的配置信息的保留和指示不保留源基站的配置信息的不保留。
可选地，所述终端设备根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息，包括：当所述RRC消息指示的第一指示信息为保留时，所述终端设备保留所述源基站当前的配置信息；或当所述切换命令指示的第一指示信息为不保留时，所述终端设备不保留所述源基站当前的配置信息。
以所述RRC消息为切换命令，且所述切换命令使用自定义的参数指示所述第一指示信息为例，若该参数为true，那么终端设备保留当前源基站的配置信息；否则，终端设备不保留当前源基站的配置信息。
以所述RRC消息为切换命令，且所述切换命令使用RRC连接重配置消息中的全配置参数(full-config)指示所述第一指示信息为例，若RRC连接重配置消息中包括了full-config，且该full-config为true，那么终端设备不需要保留源基站当前的配置信息；否则，终端设备保留源基站当前的配置信息。
本发明实施例中，终端设备保留所述源基站当前的配置信息，包括：所述终端设备保存所述源基站当前的配置信息；或所述终端设备忽略接收到的所述源基站通过RRC连接重配置消息发送的配置信息；或所述终端设备接收到所述源基站通过RRC连接重配置消息发送的配置信息时，拒绝根据所接收的配置信息执行重配置。
本申请实施例中，终端设备保留源基站当前的配置信息的方式可包括：保存源基站当前的配置信息，或在不保存源基站当前的配置信息且维持源基站当前的配置信息不变。
以所述终端设备保存所述源基站当前的配置信息对保留源基站当前的配置信息进行说明。当终端设备保存源基站当前的配置信息后，终端设备在监控所配置的目标小区的信道质量的过程中，接收到源基站发送的RRC连接重配置消息后，可执行RRC连接重配置消息，对源基站的配置信息进行更新。此时，终端设备保存有源基站旧的配置信息，且通过源基站的新的配置信息接入源基站，新的配置信息基于旧的配置信息更新得到。
以所述终端设备忽略接收到的所述源基站通过RRC连接重配置消息发送的配置信息对保留源基站当前的配置信息进行说明。当终端设备确定保留源基站当前的配置信息后，且未保存源基站当前的配置信息，终端设备在监控所配置的目标小区的信道质量的过程中，接收到源基站发送的RRC连接重配置消息后，可忽略接收到的RRC连接重配置消息，不对源基站的配置信息进行更新，以维持源基站的旧的配置信息不变。
以所述终端设备拒绝根据所接收的配置信息执行重配置对保留源基站当前的配置信息进行说明。当终端设备确定保留源基站当前的配置信息后，且未保存源基站当前的配置信息，终端设备在监控所配置的目标小区的信道质量的过程中，接收到源基站发送的RRC连接重配置消息后，可拒绝执行RRC连接重配置消息指示的重配置，不对源基站的配置信息进行更新，以维持源基站的旧的配置信息不变。可选地，可向源基站返回拒绝理由。
本发明实施例中，终端设备在接收到切换命令后，基于切换命令中所配置的目标小区的切换条件进行测量。在至少一个目标基站满足对应的切换条件之前，终端设备保持与源基站之间的数据的收发，包括接收源基站的RRC连接重配置消息，并根据第一指示信息对接收的RRC连接重配置消息进行处理。
可选地，如图5所示，在步骤S403之后，还包括步骤S404：所述终端设备根据 所述第一指示信息确定用于执行条件切换的配置信息。
当至少一个目标基站满足切换条件时，所述终端设备根据所述第一指示信息确定用于执行条件切换的配置信息。
当第一指示信息为保留时，将保留的配置信息作为用于执行条件切换的配置信息；当所述第一指示信息为不保留时，将切换命令中的携带的配置信息作为用于执行条件切换的配置信息。
终端设备根据第一指示信息确定用于保留源基站的配置信息和基于切换命令发送的目标基站的配置信息执行切换，或基于切换命令中发送的目标基站的配置信息执行切换。当终端设备根据第一指示信息确定用于保留源基站的配置信息和基于切换命令发送的目标基站的配置信息执行切换时，切换命令发送的目标基站的配置信息为基于源基站的配置信息的查分信息。
在相关技术中，若网络侧配置了条件切换，终端会持续监听所配置目标小区的信道质量并且判断是否满足切换条件，在这期间，源基站可能会发送RRC连接重配置消息给终端设备，那么在这种情况下，当目标小区满足切换条件时，切换命令中的目标基站的配置信息是基于旧的源基站的配置信息下发的，而旧的源基站的配置信息被删除，导致当前的目标基站的配置信息与切换所使用的配置信息不一致的情况发生。
本发明实施例提供的条件切换指示方法，通过RRC消息指示的第一指示信息指示终端设备收到切换命令时的行为，确定是否保留所述源基站当前的配置信息，避免出现切换条件满足但是用于切换的源基站配置信息被删除的情况的发生，保证了切换的正常执行。
本发明实施例中的条件切换指示方法中的源基站和目标基站可基于X2接或S1接口进行通信，其中，X2接口和S1接口可如图6所示。
X2接口是两个基站之间点对点的接口，实现了基站间的互通。当终端设备从源基站的小区切换目标基站的小区时，源基站和目标端基站可通过X2接口发生信令交互完成条件切换。
S1接口是核心网和接入网之间的接口界面，核心网侧的接入点是控制平面的MME/用户平面的S-GW。当终端设备从源基站的小区切换目标基站的小区时，源基站和目标端基站可通过S1接口同MME的信令交互完成条件切换。
在本发明实施例中，当通信系统为NR/5G系统，UE可以通过源基站发送的测量控 制、新的RRC消息和切换命令中任一消息指示第一指示信息。
下面，以RRC消息为切换命令为例，通过不同的实例对本发明实施例提供的NR/5G系统中的条件切换指示方法进行举例说明。
实例一
图7为实例一中的条件切换指示方法的信令交互图，包括：
步骤S701、源gNB与UE之间进行测量控制信息和测量报告的交互。
步骤S702，源gNB进行条件切换决策(CHO Decision)。
步骤S703，源gNB向目标gNB发送切换请求。
步骤S704，目标gNB执行接纳控制。
步骤S705，目标gNB向源gNB发送切换请求响应。
步骤S706，源gNB向UE发送携带设置的指示信息的切换命令。
所述切换命令用于条件切换，且该切换命令中包括了至少一个目标基站的切换条件和设置的指示信息(即自定义参数)，其中，设置的指示信息为true。
步骤S707，UE根据设置的指示信息保存源gNB当前的配置信息。
UE收到切换命令后，基于切换命令中新设置的指示信息确定是否保存源gNB当前的配信息置，该指示信息可以是重配消息中新增加的参数。若该指示信息为true，说明目标gNB发送给源gNB的重配消息是基于当前UE与源gNB的配置信息而确定的，那么UE保存源gNB当前的配置信息。
步骤S708，UE监控切换命令所配置的目标小区。
如果UE在监听目标小区的信道质量期间收到了源gNB的RRC连接重配置消息，UE需要保存源gNB当前的配置信息，并基于所接收的RRC连接重配置消息执行配置信息的重配置。
步骤S709，当目标基站满足切换条件时，执行切换。
UE基于所配置切换条件持续监测目标小区的信道质量，若有目标基站满足切换条件，UE会以保存的切换准备时的源基站的配置信息以及目标基站发送的重配置消息去进行切换。
实例二
图8为实例二中的条件切换指示方法的信令交互图，包括：
步骤S801、源gNB与UE之间进行测量控制信息和测量报告的交互。
步骤S802，源gNB进行条件切换决策(CHO Decision)。
步骤S803，源gNB向目标gNB发送切换请求。
步骤S804，目标gNB执行接纳控制。
步骤S805，目标gNB向源gNB发送切换请求响应。
步骤S806，源gNB向UE发送携带全配置参数的切换命令。
所述切换命令用于条件切换，且该切换命令中包括了至少一个目标基站的切换条件和全配置参数。
UE基于切换命令中指示信息确定是否保存源gNB当前的配置信息，该指示信息可以是指重配消息中full config参数，若该参数被配置为为true，说明该目标gNB发送给源基站的重配消息是全配置的，那么此时UE在收到源gNB发送的RRC连接重配置消息时可以不用保存源gNB当前的配置信息。
步骤S807，UE监控切换命令所配置的目标小区。
步骤S808，UE接收源gNB的RRC连接重配置消息。
UE在监听目标小区的信道质量期间收到了源gNB的RRC连接重配置消息，基于所接收的RRC连接重配置消息执行配置信息的重配置。
步骤S809，UE向源gNB返回RRC连接重配置完成消息。
步骤S810，当目标基站满足切换条件时，执行切换。
UE基于所配置切换条件持续监测目标小区的信道质量，若有目标基站满足切换条件，UE会以切换准备时的源基站的配置信息(即基于RRC连接重配置消息所更新的配置信息)以及目标基站发送的重配置消息去进行切换。
实例三
图9为实例三中的条件切换指示方法的信令交互图，包括：
步骤S901、源gNB与UE之间进行测量控制信息和测量报告的交互。
步骤S902，源gNB进行条件切换决策(CHO Decision)。
步骤S903，源gNB向目标gNB发送切换请求。
步骤S904，目标gNB执行接纳控制。
步骤S905，目标gNB向源gNB发送切换请求响应。
步骤S906，源gNB向UE发送携带全配置参数和指示信息的切换命令。
所述切换命令用于条件切换，且该切换命令中包括了至少一个目标基站的切换条件和全配置参数和指示信息。
UE基于切换命令中指示信息和full config参数确定是否保存源gNB当前的配置信 息，full config参数或者指示信息都可指示UE需要保存源gNB当前的配置信息。
步骤S907，UE监控切换命令所配置的目标小区。
步骤S908，UE接收源gNB的RRC连接重配置消息。
UE在监听目标小区的信道质量期间收到了源gNB的RRC连接重配置消息，UE为了保持切换准备时的配置信息，可以选择拒绝源基站的重配置消息，拒绝执行重配置。
步骤S909，UE向源gNB返回RRC连接重配置拒绝消息。
RRC连接重配置拒绝消息中可携带拒绝的理由。
步骤S910，当目标基站满足切换条件时，执行切换。
UE基于所配置切换条件持续监测目标小区的信道质量，若有目标基站满足切换条件，UE会以切换准备时的源基站的配置信息以及目标基站发送的重配置消息去进行切换。
为实现上述条件切换指示方法，本发明实施例还提供一种终端设备，所述终端设备的组成结构，如图10所示，终端设备1000包括：
接收单元1001，配置为接收源基站发送的RRC消息；
确定单元1002，配置为根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
本发明实施例中，所述RRC消息包括：新的RRC消息、测量控制或切换命令。
本发明实施例中，所述RRC消息指示所述第一指示信息的指示方式至少包括以下方式之一：
隐式指示；
显示指示。
本发明实施例中，当所述RRC消息指示所述第一指示信息的指示方式为隐式指示，所述RRC消息包括测量控制或切换命令，所述RRC消息不携带用于指示所述第一指示信息的参数。
本发明实施例中，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括新的RRC消息；
所述新的RRC消息使用自定义参数指示所述第一指示信息。
本发明实施例中，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括测量控制；
所述测量控制使用自定义参数指示所述第一指示信息。
本发明实施例中，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括切换命令；
所述切换命令使用自定义参数指示所述第一指示信息，或
所述切换命令使用执行条件参数指示所述第一指示信息，或
所述切换命令使用无线资源控制RRC连接重配置消息中的参数指示所述第一指示信息。
本发明实施例中，所述无线资源控制RRC连接重配置消息中的参数为全配置参数。
本发明实施例中，确定单元1002，还配置为：
当所述RRC消息指示的第一指示信息为保留时，保留所述源基站当前的配置信息；或
当所述RRC消息指示的第一指示信息为不保留时，不保留所述源基站当前的配置信息。
本发明实施例中，确定单元1002，还配置为：
保存所述源基站当前的配置信息；或
忽略接收到的所述源基站通过RRC连接重配置消息发送的配置信息；或
接收到所述源基站通过RRC连接重配置消息发送的配置信息时，拒绝根据所接收的配置信息执行重配置。
本发明实施例中，所述终端设备还包括：
配置单元，配置为根据所述第一指示信息确定用于执行条件切换的配置信息。
本发明实施例中，所述配置单元，还配置为：
当第一指示信息为保留时，将保留的配置信息作为用于执行条件切换的配置信息；或
当所述第一指示信息为不保留时，将切换命令中的携带的配置信息作为用于执行条件切换的配置信息。
本发明实施例还提供一种终端设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述终端设备执行的条件切换指示方法的步骤。
本发明实施例还提供一种源基站，所述源基站的组成结构示意图，如图11所示，源基站1100包括：
发送单元1101，配置为向终端设备发送的RRC消息；所述RRC消息指示有第一指示信息，所述第一指示信息用于所述终端设备确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
本发明实施例中，所述RRC消息包括：新的RRC消息、测量控制或切换命令。
本发明实施例中，所述RRC消息指示所述第一指示信息的指示方式至少包括以下方式至少之一：
隐式指示；
显示指示。
本发明实施例中，当所述切换命令指示所述第一指示信息的指示方式为隐式指示，述RRC消息包括测量控制或切换命令，所述测量控制或所述切换命令不携带用于指示所述第一指示信息的参数。
本发明实施例中，当所述切换命令指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括新的RRC消息；
所述新的RRC消息使用自定义参数指示所述第一指示信息。
本发明实施例中，当所述切换命令指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括测量控制；
所述测量控制使用自定义参数指示所述第一指示信息。
本发明实施例中，当所述切换命令指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括切换命令；
所述切换命令使用自定义参数指示所述第一指示信息；或
所述切换命令使用执行条件参数指示所述第一指示信息，或
所述切换命令使用RRC连接重配置消息中的参数指示所述第一指示信息。
本发明实施例中，所述RRC连接重配置消息中的参数为全配置参数。
本发明实施例中，所述源基站还包括：第一设置单元，配置为当目标基站的配置信息是基于所述源基站当前的配置信息确定的，设置所述第一指示信息为保留。
本发明实施例中，所述源基站还包括：第二设置单元，配置为当在设定的时间段内不再向所述终端设备发送RRC连接重配置消息，设置所述第一指示信息为不保留。
本发明实施例中，所述源基站还包括：第三设置单元，配置为当目标基站的配置 信息为完整的配置信息时，所述源基站设置所述第一指示信息为不保留。
本发明实施例中，所述源基站还包括：第三设置单元，配置为根据接收目标基站的第二指示信息确定所述第一指示信息。
本发明实施例还提供一种源基站，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述源基站执行的条件切换指示方法的步骤。
图12是本发明实施例的电子设备(终端设备和源基站)的硬件组成结构示意图，电子设备1200包括：至少一个处理器1201、存储器1202和至少一个网络接口1204。电子设备1200中的各个组件通过总线系统1205耦合在一起。可理解，总线系统1205用于实现这些组件之间的连接通信。总线系统1205除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图12中将各种总线都标为总线系统1205。
可以理解，存储器1202可以是易失性存储器或非易失性存储器，也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ROM、可编程只读存储器(PROM，Programmable Read-Only Memory)、可擦除可编程只读存储器(EPROM，Erasable Programmable Read-Only Memory)、电可擦除可编程只读存储器(EEPROM，Electrically Erasable Programmable Read-Only Memory)、磁性随机存取存储器(FRAM，ferromagnetic random access memory)、快闪存储器(Flash Memory)、磁表面存储器、光盘、或只读光盘(CD-ROM，Compact Disc Read-Only Memory)；磁表面存储器可以是磁盘存储器或磁带存储器。易失性存储器可以是随机存取存储器(RAM，Random Access Memory)，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(SRAM，Static Random Access Memory)、同步静态随机存取存储器(SSRAM，Synchronous Static Random Access Memory)、动态随机存取存储器(DRAM，Dynamic Random Access Memory)、同步动态随机存取存储器(SDRAM，Synchronous Dynamic Random Access Memory)、双倍数据速率同步动态随机存取存储器(DDRSDRAM，Double Data Rate Synchronous Dynamic Random Access Memory)、增强型同步动态随机存取存储器(ESDRAM，Enhanced Synchronous Dynamic Random Access Memory)、同步连接动态随机存取存储器(SLDRAM，SyncLink Dynamic Random Access Memory)、直接内存总线随机存取存储器(DRRAM，Direct Rambus Random Access Memory)。本发明实施例描述的存储器1202旨在包括但不限于这些和任意其它适合类 型的存储器。
本发明实施例中的存储器1202用于存储各种类型的数据以支持电子设备1200的操作。这些数据的示例包括：用于在电子设备1200上操作的任何计算机程序，如应用程序12021。实现本发明实施例方法的程序可以包含在应用程序12021中。
上述本发明实施例揭示的方法可以应用于处理器1201中，或者由处理器1201实现。处理器1201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，上述方法的各步骤可以通过处理器1201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1201可以是通用处理器、数字信号处理器(DSP，Digital Signal Processor)，或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。处理器1201可以实现或者执行本发明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任何常规的处理器等。结合本发明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。软件模块可以位于存储介质中，该存储介质位于存储器1202，处理器1201读取存储器1202中的信息，结合其硬件完成前述方法的步骤。
在示例性实施例中，电子设备1200可以被一个或多个应用专用集成电路(ASIC，Application Specific Integrated Circuit)、DSP、可编程逻辑器件(PLD，Programmable Logic Device)、复杂可编程逻辑器件(CPLD，Complex Programmable Logic Device)、FPGA、通用处理器、控制器、MCU、MPU、或其他电子元件实现，用于执行前述方法。
本发明实施例还提供了一种存储介质，用于存储计算机程序。
可选地，该存储介质可应用于本发明实施例中的终端设备，并且该计算机程序使得计算机执行本发明实施例的各个方法中的相应流程，为了简洁，在此不再赘述。
可选地，该存储介质可应用于本发明实施例中的源基站，并且该计算机程序使得计算机执行本发明实施例的各个方法中的相应流程，为了简洁，在此不再赘述。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (52)

  1. 一种条件切换指示方法，包括：
    终端设备接收源基站发送的无线资源控制RRC消息；
    所述终端设备根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
  2. 根据权利要求1所述的方法，所述RRC消息包括：新的RRC消息、测量控制或切换命令。
  3. 根据权利要求1或2所述的方法，所述RRC消息指示所述第一指示信息的指示方式至少包括以下方式之一：
    隐式指示；
    显示指示。
  4. 根据权利要求3所述的方法，当所述RRC消息指示所述第一指示信息的指示方式为隐式指示，所述RRC消息包括测量控制或切换命令，所述测量控制或所述切换命令不携带用于指示所述第一指示信息的参数。
  5. 根据权利要求3所述的方法，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括新的RRC消息；
    所述新的RRC消息使用自定义参数指示所述第一指示信息。
  6. 根据权利要求3述的方法，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括测量控制；
    所述测量控制使用自定义参数指示所述第一指示信息。
  7. 根据权利要求3所述的方法，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括切换命令；
    所述切换命令使用自定义参数指示所述第一指示信息，或
    所述切换命令使用执行条件参数指示所述第一指示信息，或
    所述切换命令使用RRC连接重配置消息中的参数指示所述第一指示信息。
  8. 根据权利要求7所述的方法，所述RRC连接重配置消息中的参数为全配置参数。
  9. 根据权利要求1至8任一项所述的方法，所述终端设备根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置 信息，包括：
    当所述RRC消息指示的第一指示信息为保留时，所述终端设备保留所述源基站当前的配置信息；或
    当所述RRC消息指示的第一指示信息为不保留时，所述终端设备不保留所述源基站当前的配置信息。
  10. 根据权利要求9所述的方法，所述终端设备保留所述源基站当前的配置信息，包括：
    所述终端设备保存所述源基站当前的配置信息；或
    所述终端设备忽略接收到的所述源基站通过RRC连接重配置消息发送的配置信息；或
    所述终端设备接收到所述源基站通过RRC连接重配置消息发送的配置信息时，拒绝根据所接收的配置信息执行重配置。
  11. 根据权利要1至10任一项所述的方法，所述方法还包括：
    所述终端设备根据所述第一指示信息确定用于执行条件切换的配置信息。
  12. 根据权利要求11所述的方法，所述终端设备根据所述第一指示信息确定用于执行条件切换的配置信息，包括：
    当第一指示信息为保留时，将保留的配置信息作为用于执行条件切换的配置信息；或
    当所述第一指示信息为不保留时，将切换命令中的携带的配置信息作为用于执行条件切换的配置信息。
  13. 一种条件切换指示方法，包括：
    源基站向终端设备发送的无线资源控制RRC消息；所述RRC消息指示有第一指示信息，所述第一指示信息用于所述终端设备确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
  14. 根据权利要求13所述的方法，所述RRC消息包括：新的RRC消息、测量控制或切换命令。
  15. 根据权利要求13或14所述的方法，所述RRC消息指示所述第一指示信息的指示方式至少包括以下方式至少之一：
    隐式指示；
    显示指示。
  16. 根据权利要求15所述的方法，当所述RRC消息指示所述第一指示信息的指示方式为隐式指示，所述RRC消息包括测量控制或切换命令，所述测量控制或所述切换命令不携带用于指示所述第一指示信息的参数。
  17. 根据权利要求15所述的方法，当所述切换命令指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括新的RRC消息；
    所述新的RRC消息使用自定义参数指示所述第一指示信息。
  18. 根据权利要求15所述的方法，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括测量控制；
    所述测量控制使用自定义参数指示所述第一指示信息。
  19. 根据权利要求15所述的方法，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括切换命令；
    所述切换命令使用自定义参数指示所述第一指示信息；或
    所述切换命令使用执行条件参数指示所述第一指示信息，或
    所述切换命令使用无线资源控制RRC连接重配置消息中的参数指示所述第一指示信息。
  20. 根据权利要求19所述的方法，所述无线资源控制RRC连接重配置消息中的参数为全配置参数。
  21. 根据权利要求13至20任一项所述的方法，所述方法还包括：
    当目标基站的配置信息是基于所述源基站当前的配置信息确定的，所述源基站设置所述第一指示信息为保留。
  22. 根据权利要求13至20任一项所述的方法，所述方法还包括：
    当在设定的时间段内不再向所述终端设备发送RRC连接重配置消息，所述源基站设置所述第一指示信息为不保留。
  23. 根据权利要求13至20任一项所述的方法，所述方法还包括：
    当目标基站的配置信息为完整的配置信息时，所述源基站设置所述第一指示信息为不保留。
  24. 根据权利要求13至20任一项所述的方法，所述方法还包括：
    所述源基站根据接收目标基站的第二指示信息确定所述第一指示信息。
  25. 一种终端设备，包括：
    接收单元，配置为接收源基站发送的无线资源控制RRC消息；
    确定单元，配置为根据所述RRC消息指示的第一指示信息，确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
  26. 根据权利要求25所述的终端设备，所述RRC消息包括：新的RRC消息、测量控制或切换命令。
  27. 根据权利要求25或26任一项所述的终端设备，所述RRC消息指示所述第一指示信息的指示方式至少包括以下方式之一：
    隐式指示；
    显示指示。
  28. 根据权利要求27所述的终端设备，当所述RRC消息指示所述第一指示信息的指示方式为隐式指示，所述RRC消息包括测量控制或切换命令，所述RRC消息不携带用于指示所述第一指示信息的参数。
  29. 根据权利要求27所述的终端设备，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括新的RRC消息；
    所述新的RRC消息使用自定义参数指示所述第一指示信息。
  30. 根据权利要求27所述的终端设备，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括测量控制；
    所述测量控制使用自定义参数指示所述第一指示信息。
  31. 根据权利要求27所述的终端设备，当所述RRC消息指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括切换命令；
    所述切换命令使用自定义参数指示所述第一指示信息，或
    所述切换命令使用执行条件参数指示所述第一指示信息，或
    所述切换命令使用RRC连接重配置消息中的参数指示所述第一指示信息。
  32. 根据权利要求31所述的终端设备，所述RRC连接重配置消息中的参数为全配置参数。
  33. 根据权利要求25至32任一项所述的终端设备，所述确定单元，还配置为：
    当所述RRC消息指示的第一指示信息为保留时，保留所述源基站当前的配置信息；或
    当所述RRC消息指示的第一指示信息为不保留时，不保留所述源基站当前的配置信息。
  34. 根据权利要求33所述的终端设备，所述确定单元，还配置为：
    保存所述源基站当前的配置信息；或
    忽略接收到的所述源基站通过RRC连接重配置消息发送的配置信息；或
    接收到所述源基站通过RRC连接重配置消息发送的配置信息时，拒绝根据所接收的配置信息执行重配置。
  35. 根据权利要25至34任一项所述的终端设备，所述终端设备还包括：
    配置单元，配置为根据所述第一指示信息确定用于执行条件切换的配置信息。
  36. 根据权利要求35所述的终端设备，所述配置单元，还配置为：
    当第一指示信息为保留时，将保留的配置信息作为用于执行条件切换的配置信息；或
    当所述第一指示信息为不保留时，将切换命令中的携带的所述源基站的配置信息作为用于执行条件切换的配置信息。
  37. 一种源基站，包括：
    发送单元，配置为向终端设备发送的无线资源控制RRC消息；所述RRC消息指示有第一指示信息，所述第一指示信息用于所述终端设备确定保留所述源基站当前的配置信息或不保留源基站当前的配置信息。
  38. 根据权利要求37所述的源基站，所述RRC消息包括：新的RRC消息、测量控制或切换命令。
  39. 根据权利要求37或38所述的源基站，所述RRC消息指示所述第一指示信息的指示方式至少包括以下方式至少之一：
    隐式指示；
    显示指示。
  40. 根据权利要求39所述的源基站，当所述切换命令指示所述第一指示信息的指示方式为隐式指示，所述RRC消息包括测量控制或切换命令，所述测量控制或所述切换命令不携带用于指示所述第一指示信息的参数。
  41. 根据权利要求39所述的源基站，当所述切换命令指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括新的RRC消息；
    所述新的RRC消息使用自定义参数指示所述第一指示信息。
  42. 根据权利要求39所述的源基站，当所述切换命令指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括测量控制；
    所述测量控制使用自定义参数指示所述第一指示信息。
  43. 根据权利要求39所述的源基站，当所述切换命令指示所述第一指示信息的指示方式为显示指示，所述RRC消息包括切换命令；
    所述切换命令使用自定义参数指示所述第一指示信息；或
    所述切换命令使用执行条件参数指示所述第一指示信息，或
    所述切换命令使用RRC连接重配置消息中的参数指示所述第一指示信息。
  44. 根据权利要求43所述的源基站，所述RRC连接重配置消息中的参数为全配置参数。
  45. 根据权利要求37至44任一项所述的源基站，所述源基站还包括：第一设置单元，配置为当目标基站的配置信息是基于所述源基站当前的配置信息确定的，设置所述第一指示信息为保留。
  46. 根据权利要求37至44任一项所述的源基站，所述源基站还包括：第二设置单元，配置为当在设定的时间段内不再向所述终端设备发送RRC连接重配置消息，设置所述第一指示信息为不保留。
  47. 根据权利要求37至44任一项所述的源基站，所述源基站还包括：第三设置单元，配置为目标基站的配置信息为完整的配置信息时，所述源基站设置所述第一指示信息为不保留。
  48. 根据权利要求37至44任一项所述的源基站，所述源基站还包括：第三设置单元，配置为根据接收目标基站的第二指示信息确定所述第一指示信息。
  49. 一种终端设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述权利要求1至12任一项所述的条件切换指示方法的步骤。
  50. 一种源基站，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述权利要求13至24任一项所述的条件切换指示方法的步骤。
  51. 一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现上述权利要求1至12任一项所述的条件切换指示方法。
  52. 一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现上述权利要求13至24任一项所述的条件切换指示方法。
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