WO2020103106A1 - 一种异系统切换方法及装置 - Google Patents

一种异系统切换方法及装置

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Publication number
WO2020103106A1
WO2020103106A1 PCT/CN2018/117023 CN2018117023W WO2020103106A1 WO 2020103106 A1 WO2020103106 A1 WO 2020103106A1 CN 2018117023 W CN2018117023 W CN 2018117023W WO 2020103106 A1 WO2020103106 A1 WO 2020103106A1
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WO
WIPO (PCT)
Prior art keywords
information
network device
cell
scg
terminal device
Prior art date
Application number
PCT/CN2018/117023
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English (en)
French (fr)
Inventor
侯佳翔
王振东
葛欣明
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201880099455.XA priority Critical patent/CN113039832B/zh
Priority to PCT/CN2018/117023 priority patent/WO2020103106A1/zh
Publication of WO2020103106A1 publication Critical patent/WO2020103106A1/zh

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

Definitions

  • the present application relates to the technical field of wireless communication, and in particular to a method and device for switching between different systems.
  • LTE and 5G new radio are both communication standards defined by the 3GPP specifications.
  • UE terminal equipment
  • the network equipment controls the UE to switch between different systems between the LTE and NR modes.
  • Carrier aggregation (CA) technology is a method that aggregates component carriers together to increase system bandwidth and increase uplink and downlink transmission rates.
  • CA Carrier aggregation
  • a UE accesses a network device that supports the 5G NR communication standard
  • the network device that supports the 5G NR communication standard adopts carrier aggregation technology to configure a secondary carrier cell for the UE
  • the UE supports the 5G NR communication standard
  • the originally configured secondary carrier cell will be released, which in turn will cause the UE transmission rate to decrease.
  • the present application provides a method and device for switching between different systems, to solve the technical problem that the transmission rate drops when the UE performs switching between different systems of different communication systems in the prior art.
  • an embodiment of the present application provides a method for switching between different systems.
  • the method may be performed by a first network device.
  • the method includes: the first network device receives first information and second information sent by a second network device.
  • the first information is used to indicate the primary carrier cell that the terminal device accesses before the inter-system handover, and the second information is used to indicate one or more secondary carrier cells that the terminal device accesses before the inter-system handover;
  • the first network device configures the primary carrier cell indicated by the first information as the primary cell in the secondary cell group SCG that the terminal device accesses after the inter-system handover, and supplements all or part of the secondary cell indicated by the second information
  • the carrier cell is configured as a secondary cell in the SCG; the first network device sends third information to the terminal device through the second network device, and the third information is used to indicate the primary cell in the SCG Cell and auxiliary cell.
  • the first network device may receive the first information and the second information sent by the second network device, and configure the secondary cell that the terminal device accesses after performing a different system handover according to the first information and the second information.
  • the primary carrier cell that the terminal device indicated by the first information accesses before the inter-system handover is configured as the primary cell in the secondary cell group, and the terminal device indicated by the second information accesses before the inter-system handover
  • the secondary carrier cell is configured as the secondary cell in the secondary cell group.
  • the terminal device can still maintain a communication connection with the primary carrier cell and the secondary carrier cell before the handover after the inter-system handover, thus effectively avoiding the handover due to the different system During the process, the secondary carrier cell is released, which leads to the technical problem that the transmission rate of the terminal device decreases, ensuring the continuity of data transmission of the terminal device.
  • the first network device configures the primary carrier cell indicated by the first information as the primary cell in the secondary cell group SCG that the terminal device accesses after a different system handover.
  • the first network device may also send fourth information to the second network device, where the fourth information is used Instructing the first network device to determine each candidate cell for configuring the SCG based on the first information and the second information; the first network device receiving fifth information sent by the second network device; The fifth information is used to indicate the SCG determined by the second network device according to each candidate cell, and the secondary cell of the SCG includes at least one secondary carrier cell among the one or more secondary carrier cells.
  • the first network device may directly configure the secondary carrier cell that the terminal device accesses before the inter-system handover as the secondary cell in the secondary cell group, or may interact with the second network device in the secondary cell group.
  • the candidate cell configures some secondary carrier cells as secondary cells in the secondary cell group that will be accessed after a different system handover. In this way, the spectrum resource utilization efficiency of the system can be effectively improved and the flexibility of secondary cell group configuration can be increased.
  • the first network device may receive the first information and the second information sent by a core network element, where the first information and the second information are the second Sent by the network device to the core network element; the first network device may also receive the first information and the second information directly sent by the second network device.
  • the first network device and the second network device can communicate directly or indirectly through the core network element, thereby effectively improving the applicability of the method for switching between different systems in the embodiment of the present application.
  • the first network device may be a network device supporting a long-term evolution LTE communication system
  • the second network device may be a network device supporting a new wireless NR communication system.
  • an embodiment of the present application also provides another method for switching between different systems.
  • the method may be executed by a second network device.
  • the method includes: the second network device obtains the first information and the second information, and sends the first network device Sending the first information and the second information, the first information is used to indicate the primary carrier cell that the terminal device accesses before the handover of the different system, and the second information is used to indicate that the terminal device is in the different system One or more secondary carrier cells accessed before handover; the second network device receives the third information sent by the first network device, and sends the third information to the terminal device, the third The information is used to indicate the primary cell and the secondary cell in the secondary cell group SCG that the terminal device accesses after the inter-system handover.
  • the primary cell is the primary carrier cell indicated by the first information, and the secondary cell includes all All or part of the secondary carrier cells indicated by the second information.
  • the second network device may send the first information and the second information to the first network device, and use the first information and the second information to indicate to the first network device that the terminal device accesses before the handover between different systems
  • the primary carrier cell and the secondary carrier cell so that the first network device can configure the secondary cell group that the terminal device accesses after performing the inter-system handover according to the first information and the second information, and access the terminal device before the inter-system handover
  • the primary carrier cell of is configured as the primary cell in the secondary cell group
  • the secondary carrier cell that the terminal device accesses before the inter-system handover is configured as the secondary cell in the secondary cell group.
  • the terminal device can still maintain a communication connection with the primary carrier cell and the secondary carrier cell before the handover after performing the inter-system handover, thereby effectively avoiding the transmission rate of the terminal device being reduced due to the release of the secondary carrier cell during the inter-system handover.
  • the first The second network device may also receive fourth information sent by the first network device, where the fourth information is used to instruct the first network device to determine the SCG based on the first information and the second information Candidate cells of the second network device; the second network device sends fifth information to the first network device, where the fifth information is used to indicate the SCG determined by the second network device according to each candidate cell, the SCG
  • the secondary cell of includes at least one secondary carrier cell among the one or more secondary carrier cells.
  • the second network device may receive the fourth information sent by the first network device, and switch the terminal device in a different system according to each candidate cell in the secondary cell group indicated by the first network device in the fourth information At least one secondary carrier cell in the previously accessed secondary carrier cell is configured as a secondary cell in the secondary cell group, thereby effectively improving the spectrum resource utilization efficiency of the system and increasing the flexibility of secondary cell group configuration.
  • the second network device may send the first information and the second information to a core network element, and the first information and the The second information is sent to the first network device; the second network device may also directly send the first information and the second information to the first network device.
  • the first network device and the second network device can communicate directly or indirectly through the core network element, thereby effectively improving the applicability of the method for switching between different systems in the embodiment of the present application.
  • the second network device may be a network device supporting a new wireless NR communication system
  • the first network device may be a network device supporting a long-term evolution LTE communication system.
  • an embodiment of the present application provides an apparatus that has a function of implementing the first network device in the first aspect or any possible design of the first aspect, which may be implemented by hardware or by The corresponding software is implemented by hardware, and the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the device includes a processing module and a transceiver module, and the processing module is configured to support the device to perform the corresponding method steps in the first aspect or any design of the first aspect .
  • the transceiver module is used to support communication between the apparatus and the second network device or other communication devices.
  • the device may further include a storage module coupled to the processing module, which stores necessary program instructions and data of the device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory.
  • an embodiment of the present application provides an apparatus having a function of implementing a second network device in the second aspect or any possible design of the second aspect, which may be implemented by hardware or by
  • the corresponding software is implemented by hardware, and the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the device includes a processing module and a transceiver module, and the processing module is configured to support the device to perform the corresponding method steps in the above second aspect or any of the designs of the second aspect .
  • the transceiver module is used to support communication between the apparatus and the first network device or other communication devices.
  • the device may further include a storage module coupled to the processing module, which stores necessary program instructions and data of the device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory.
  • an embodiment of the present application provides a computer-readable storage medium that stores computer-readable instructions.
  • the computer reads and executes the computer-readable instructions, the computer can execute the foregoing Any possible design method in one aspect or in the second aspect.
  • an embodiment of the present application provides a computer program product that, when a computer reads and executes the computer program product, enables the computer to execute any of the possible design methods in the first aspect or the second aspect .
  • an embodiment of the present application provides a chip that is connected to a memory and used to read and execute a software program stored in the memory to implement any one of the first aspect or the second aspect.
  • a communication system including the above-mentioned first network device and second network device, wherein the first network device is used to perform the above-mentioned first aspect or any of the first aspect A corresponding method step in a design, the second network device is configured to perform the corresponding method step in the above second aspect or any one of the designs in the second aspect.
  • FIG. 1 is a schematic diagram of a network architecture to which embodiments of the application are applicable;
  • FIG. 2 is a schematic flowchart of a method for switching between different systems according to an embodiment of the present application
  • FIG. 3 is a handover flowchart provided in a specific embodiment 1 of the present application.
  • FIG. 5 is a schematic structural diagram of a device provided in an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of another device provided in an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of another device provided in an embodiment of the present application.
  • Terminal devices including devices that provide voice and / or data connectivity to users, for example, may include handheld devices with wireless connection capabilities, or processing devices connected to wireless modems.
  • the terminal device can communicate with the core network via a radio access network (RAN) and exchange voice and / or data with the RAN.
  • the terminal equipment may include user equipment (user equipment, UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote Remote station, access point (AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), or user Equipment (user device), etc.
  • a mobile phone or called a “cellular” phone
  • a computer with a mobile terminal device, a portable, pocket-sized, handheld, built-in or on-board mobile device, smart wearable device, and the like.
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • restricted devices such as devices with low power consumption, or devices with limited storage capacity, or devices with limited computing power. Examples include bar code, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.
  • RFID radio frequency identification
  • GPS global positioning system
  • laser scanners and other information sensing equipment.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be referred to as wearable smart devices. It is a general term for applying wearable technology to intelligently design everyday wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions that do not depend on smartphones, such as: smart watches or smart glasses, and only focus on a certain type of application functions, and need to cooperate with other devices such as smartphones Use, such as all kinds of smart bracelets, smart helmets, smart jewelry for sign monitoring.
  • a network device for example, including a base station (for example, an access point), may refer to a device that communicates with a wireless terminal device through one or more cells at an air interface in an access network.
  • the network device can be used to convert received air frames and Internet Protocol (IP) packets to each other as a router between the terminal device and the rest of the access network, where the rest of the access network can include an IP network.
  • IP Internet Protocol
  • the network equipment can also coordinate the management of the attributes of the air interface.
  • the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the fifth generation mobile communication technology (fifth generation, 5G) new radio (NR) system, the next generation node B (next generation node B, gNB) or it can also include a cloud access network (cloud radio access)
  • 5G new radio
  • gNB next generation node B
  • cloud radio access cloud radio access
  • the centralized unit (CU) and distributed unit (DU) in the network, CloudRAN) system are not limited in the embodiments of the present application.
  • Carrier aggregation refers to a technology in which a network device configures multiple carriers for a terminal device, and the terminal device and the network device use multiple carriers to perform data transmission together.
  • the multiple carriers generally include a primary carrier (PCC) and one or more secondary carriers (SCC).
  • the cell operating on the primary carrier is the primary carrier cell (PCell).
  • PCell is the cell when the terminal is initially accessed.
  • the base station where the PCell is located is responsible for radio resource control (RRC) communication with the terminal.
  • RRC radio resource control
  • the cell working on the secondary carrier is a secondary carrier cell (secondary carrier cell, SCell), and the SCell can provide additional wireless resources for the terminal.
  • SCell secondary carrier cell
  • Dual connectivity refers to a technology in which a terminal device establishes and maintains a communication connection with at least two network devices at the same time, and uses wireless resources provided by the at least two network devices for data transmission.
  • the at least two network devices are connected by a non-ideal backhaul link, and may be network devices supporting different access technologies.
  • dual connectivity it includes two cell groups, namely a primary cell group (MCG) and a secondary cell group (SCG). Both MCG and SCG can include a primary cell and one or more secondary cells .
  • the network device responsible for managing the MCG among the at least two network devices is the primary network device, which is used to provide the control plane connection between the terminal device and the core network
  • the network device responsible for managing the SCG is the secondary network device, which is used for the terminal Provide additional wireless resources.
  • Inter-system handover refers to the handover that the terminal device performs between two networks with different communication standards. For example, the terminal device switches from the cell of the original LTE network to the cell of the 5G network, or it can also Switch from the cell of the original 5G network to the cell of the LTE network.
  • the technical solutions provided in the embodiments of the present application can be applied to 5G systems, evolved long-term evolution (LTE-A) systems, and so on.
  • the technical solution can also be applied to future-oriented communication technologies.
  • the network structure described in the embodiments of the present application is to more clearly explain the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application.
  • the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.
  • FIG. 1 exemplarily shows an application scenario of an embodiment of the present application, or a network architecture to which the embodiment of the present application is applicable.
  • the network architecture may be a next-generation wireless access network (next generation radio access networks, NG -RAN) A network architecture of the system.
  • the 5G base station (5G eNodeB, gNB) in this network architecture provides NR user plane and control plane protocols for terminal equipment, and gNB is connected to the core network of the 5G system
  • the non 5G base station non 5G base station (non 5G eNodeB, ng-eNB) provides evolved global terrestrial wireless access network (E-UTRAN) user plane and control plane protocols for terminal equipment, and ng-eNB is also connected to the core network of the 5G system.
  • E-UTRAN evolved global terrestrial wireless access network
  • the gNB and ng-eNB are interconnected through the Xn interface, and both gNB and ng-eNB are connected to the access and mobility management function (AMF) in the 5G core network (5GC) through the NG interface or User plane function (user plane function, UPF).
  • AMF access and mobility management function
  • 5GC 5G core network
  • UPF User plane function
  • terminal devices are not shown in FIG. 4, in fact, each gNB or ng-gNB in FIG. 4 may serve one or more terminal devices, and the technical solutions provided in the embodiments of the present application can be served by The gNB of the terminal device and / or the ng-gNB serving the terminal device are executed.
  • FIG. 2 exemplarily shows a method for switching between different systems according to an embodiment of the present application. As shown in FIG. 2, the method includes:
  • Step S201 The second network device obtains the first information and the second information, and sends the first information and the second information to the first network device.
  • the first network device is a network device that the terminal device will access after performing a different system switch
  • the second network device is a network device that the terminal device accesses before performing a different system switch
  • the first information is used to indicate that the terminal device is The primary carrier cell accessed before the inter-system handover
  • the second information is used to indicate one or more secondary carrier cells accessed by the terminal device before the inter-system handover;
  • the terminal device is in a state of accessing the second network device, and the second network device may simultaneously use the radio resources of the primary carrier cell and one or more secondary carrier cells to transmit data for the terminal device.
  • the second network device may send the first information and the second information to the second network device to notify the first network device before the terminal device is triggered to switch between different systems Information of the primary carrier cell and the secondary carrier cell used by the terminal device for carrier aggregation before handover.
  • the first information may include the cell identity of the primary carrier cell
  • the second information may include the cell identity of one or more secondary carrier cells.
  • the first network device and the second network device involved in the embodiments of the present application are network devices that conform to different communication standards.
  • the first network device is a network device that supports the LTE communication system
  • the second network device is a network device that supports the 5G NR communication system.
  • the first network device may be an ng-eNB network node in the NG-RAN system
  • the second network device may be a gNB network node in the NG-RAN system.
  • Both the first network device and the second network device may be connected to a core network element through an NG interface, and the core network element may be AMF or UPF in the 5G core network shown in the network structure in FIG. 1.
  • the core network element may be AMF or UPF in the 5G core network shown in the network structure in FIG. 1.
  • the second network device can communicate with AMF or The NG interface between UPFs sends the first information and the second information to the AMF or UPF, via the NG interface between the AMF or UPF network element and the first network device via the AMF or UPF, and then the first information and The second information is sent to the first network device.
  • the second network device may also send the first information and the second information to the AMF or UPF first, and then send the AMF or UPF
  • this embodiment of the present application does not specifically limit this.
  • the first network device and the second network device determine the interaction mode, it means direct communication or indirect communication.
  • the first network device and the second network device can also interact with other information, for example, The mentioned third information, fourth information, fifth information, etc. can also be sent and received in the same interactive manner, which will not be repeated in the embodiments of the present application.
  • Step S202 The first network device receives the first information and the second information sent by the second network device;
  • Step S203 The first network device configures the primary carrier cell indicated in the first information as the primary cell in the secondary cell group SCG that the terminal device accesses after the inter-system handover, and configures all or part of the secondary carrier indicated in the second information
  • the cell is configured as a secondary cell in the SCG that the terminal device accesses after switching between different systems
  • the first network device may receive the first information and the second information sent by the second network device, and the terminal device indicated in the first information accesses the main
  • the carrier cell configuration is: the primary cell in the SCG that the terminal device will access after the inter-system handover, and all or part of the secondary carrier cells accessed by the terminal device indicated in the second information before the inter-system handover are configured as: terminal device The secondary cell in the SCG that will be accessed after the inter-system handover.
  • the primary carrier cell, the secondary carrier cell involved in this step and the primary cell and the secondary cell in the SCG are concepts in different communication technologies, and the primary carrier cell and the secondary carrier cell respectively correspond to the second network device in
  • the carrier aggregation technology is used for the primary carrier and the secondary carrier used by the terminal device to transmit data, and the primary cell and the secondary cell are in the secondary cell group configured by the first network device when using the dual connection technology to transmit data for the terminal device.
  • the primary cell and the secondary cell, and the primary cell and the secondary cell are set for the purpose of providing additional wireless resources for the terminal device.
  • the terminal equipment can maintain a communication connection with the primary carrier cell and one or more secondary carrier cells before the inter-system handover, after the inter-system handover, the terminal equipment not only maintains a communication connection with each cell set in the SCG, but also Access a cell under the first network device, use the radio resources in the cell, and the cell performs mobility management on the terminal device.
  • the cell under the first network device mentioned here refers to the primary cell group MCG that the terminal device is connected to after switching between different systems.
  • the MCG may include one or more cells. For simplicity of description, only one cell is used as an example.
  • the first network device may configure all or part of the original one or more secondary carrier cells as SCG according to the transmission bandwidth requirements of the terminal device In the secondary community.
  • Step S204 The first network device sends third information to the terminal device through the second network device.
  • the third information is used to indicate the primary cell and the secondary cell in the SCG configured by the first network device.
  • the first network device may also send fourth information to the second network device, where the fourth information is used to indicate the first network device Determined according to the primary carrier cell and one or more secondary carrier cells indicated by the first information and the second information, and used to construct each candidate cell of the SCG, for example, the fourth information may include the cell identifier of each candidate cell .
  • the second network device may according to each candidate cell of the SCG provided by the first network device, the primary carrier cell and the secondary carrier cell currently accessed by the terminal device, and the Each cell jointly determines each cell in the SCG, and carries the SCG information (for example, the cell ID of each cell in the SCG) in the fifth information and sends it to the first network device.
  • the SCG information for example, the cell ID of each cell in the SCG
  • the fifth information is used to instruct the second network device to determine, based on each candidate cell, the first network device to allow the SCG to configure a dual-system dual-use connection.
  • the primary cell in the SCG is the terminal device in the different system
  • the primary carrier cell that is accessed during carrier aggregation before handover, the secondary cell in the SCG may be one or more, which may include at least one secondary carrier cell connected by the terminal device during carrier aggregation before the inter-system handover, and / or ,
  • the cells of the first network device are different from other cells of the primary carrier cell and the secondary carrier cell.
  • the first network device may configure the SCG according to the primary cell and the secondary cell of the SCG indicated by the second network device in the fifth information.
  • the third information may be sent to the terminal device through the second network device, and the third information is used to instruct the terminal device to access after the handover between different systems The primary cell and the secondary cell in the SCG. That is to say, since the terminal device is connected to the second network device before the inter-system handover, the first network device may send the third information to the second network device, and the second network device may then send the third information to the The terminal device notifies the terminal device to configure the SCG according to the third information when performing inter-system handover. After that, the second network device may send an RRC connection reconfiguration request message to the terminal device to trigger the terminal device to start handover.
  • the third information may configure SCG configuration encoding information for the first network device, so that when the second network device triggers the terminal device to perform a different system switch, the terminal device may indicate according to the third information
  • the configuration coding information directly configures the dual-connected SCG to ensure the continuity of data transmission before and after the terminal device is switched.
  • the second network device may configure the terminal device with a primary carrier cell and one or more secondary carrier cells through carrier aggregation technology.
  • the terminal device and the primary carrier cell simultaneously Establish a communication connection with one or more secondary carrier cells.
  • the second network device may be used to indicate the primary carrier cell and the secondary carrier cell before triggering the terminal device to perform the inter-system handover.
  • the first information and the second information are sent to the first network device, so that the first network device configures the SCG that the terminal device will access after the inter-system handover according to the first information and the second information.
  • the first network device may configure the primary carrier cell indicated by the first information as the primary cell in the SCG, and configure the secondary carrier cell indicated by the second information as the secondary cell in the SCG.
  • the terminal device can use the dual connection technology to simultaneously connect the cell of the first network device and each cell in the SCG after performing the inter-system handover, thereby effectively avoiding the release of the secondary carrier cell during the inter-system handover process, resulting in the terminal device Technical issues with reduced transmission rates.
  • FIG. 3 is a handover flow chart for handover of different systems through an NG interface provided in the first embodiment of the present application.
  • the UE is handed over to the ng-eNB from the gNB different system initially accessed.
  • the handover process specifically includes:
  • the source gNB triggers the UE to perform a different system switch to the 4G LTE communication system through the NG interface.
  • the source gNB sends a handover request (handover required) message to the AMF, and the source-to-target transparent container (source to target) in the handover required message
  • the transparent information element carries the information of the primary carrier cell and the secondary carrier cell of the source gNB for carrier aggregation, for example, the identifiers of the primary carrier cell and the secondary carrier cell.
  • the AMF After receiving the handover required message, the AMF sends the source to target transparent container cell to the target ng-eNB through a handover request (handover request) message.
  • the target ng-eNB uses the carrier aggregation information transmitted by the source gNB (that is, the information of the primary carrier cell and the secondary carrier cell) for 4G and 5G dual connectivity under NG-RAN (NG-RAN E-UTRA-NR dual connectivity, NGEN- DC) The addition of SCG.
  • the target ng-eNB encapsulates the RRC reconfiguration message carrying the SCG configuration information into the target-to-source transparent container of the handover request response (handover request acknowledgement) message (target to source transparent container)
  • the cell is sent to the AMF, and the AMF brings it back to the source gNB through a handover command (handover command) message, which is used to notify the UE to directly configure the SCG when performing a different system handover.
  • handover command handover command
  • the source gNB sends an RRC reconfiguration message to the UE to trigger the UE to switch between different systems.
  • the UE uses the SCG configuration information in the RRC reconfiguration message to configure the SCG. After the configuration is complete, it sends an RRC reconfiguration complete message to the target ng-eNB.
  • the target ng-eNB sends a handover notification message to the AMF, and the AMF sends a UE context release message to the source gNB.
  • FIG. 4 is a handover flowchart for performing a different system handover through an Xn interface provided by a specific embodiment 2 of the present application.
  • the UE is also handed over from the initially accessed gNB to the ng-eNB.
  • the handover process specifically includes:
  • the source gNB triggers an inter-system handover to the 4G LTE communication system through the Xn interface.
  • the source gNB sends a handover request (handover request) message to the target ng-eNB and is carried in the RRC context (RRC context) cell of the handover request message
  • RRC context RRC context
  • the information of the primary carrier cell and the secondary carrier cell where the source gNB performs carrier aggregation may be, for example, the identities of the primary carrier cell and the secondary carrier cell.
  • the target ng-eNB uses the carrier aggregation information delivered by the source gNB (that is, the information of the primary carrier cell and the secondary carrier cell) to add the NGEN-DC SCG.
  • the target ng-eNB After the SCG is successfully added, the target ng-eNB encapsulates the RRC reconfiguration message carrying the SCG configuration information into a transparent container (target-NG-RAN) from the target node to the source node of the handover request response (handover request acknowledgement) message.
  • target-NG-RAN transparent container
  • node NG-RAN node-transparent container
  • the source gNB sends an RRC reconfiguration message to the UE, triggers the UE to switch between different systems, and configures the SCG using the SCG configuration information in the RRC reconfiguration message. After the UE is configured, it sends an RRC reconfiguration complete message to the target ng-eNB.
  • the target ng-eNB sends a UE context release message to the source gNB.
  • an embodiment of the present application further provides an apparatus.
  • FIG. 5 it is a schematic structural diagram of an apparatus provided by an embodiment of the present application.
  • the apparatus can perform the actions of the first network device or the second network device in the foregoing method embodiments.
  • the apparatus 500 includes: a processing module 510 ⁇ ceive module 520.
  • the processing module 510 and the transceiver module 520 respectively perform the following steps:
  • the transceiver module 520 receives first information and second information sent by a second network device, where the first information is used to indicate the primary carrier cell that the terminal device accesses before the inter-system handover, and the second information is used to indicate the One or more secondary carrier cells that the terminal device accesses before the inter-system handover; the processing module 510 configures the primary carrier cell indicated by the first information as the secondary cell group SCG that the terminal device accesses after the inter-system handover The primary cell in, configures the secondary carrier cell indicated by the second information as the secondary cell in the SCG; the transceiver module 520 sends the third information to the terminal device through the second network device, the first The three pieces of information are used to indicate the primary cell and the secondary cell in the SCG.
  • the processing module 510 and the transceiver module 520 respectively perform the following steps:
  • the processing module 510 acquires the first information and the second information; the transceiving module 520 sends the first information and the second information to the first network device, where the first information is used to instruct the terminal device to access before the inter-system handover
  • the primary carrier cell the second information is used to indicate one or more secondary carrier cells that the terminal device accesses before the inter-system handover; and, to receive the third information sent by the first network device, And sending the third information to the terminal device, where the third information is used to indicate the primary cell and the secondary cell in the secondary cell group SCG that the terminal device accesses after the inter-system handover, where the primary cell is The primary carrier cell indicated by the first information, and the secondary cell include all or part of the secondary carrier cells indicated by the second information.
  • processing module 510 in the embodiment of the present invention may be implemented by a processor or a processor-related circuit component
  • transceiver module 520 may be implemented by a transceiver or a transceiver-related circuit component.
  • the device 600 includes a processor 610, a memory 620, and a transceiver 630, where the memory 620 stores instructions or programs, and the processor 610 is used to execute the instructions or programs stored in the memory 620.
  • the processor 610 is used to perform the operation performed by the processing module 510 in the foregoing embodiment
  • the transceiver 630 is used to perform the operation performed by the transceiver module 520 in the foregoing embodiment.
  • An embodiment of the present application further provides a communication device, and the communication device may be a chip, a network device (such as a base station), a circuit, or other network device.
  • the communication apparatus includes one or more processors, and the one or more processors may implement actions performed by the first network device or the second network device in the method embodiment shown in FIG. 2.
  • FIG. 7 shows a schematic structural diagram of a network device, such as a schematic structural diagram of a base station.
  • the base station can be applied to the system shown in FIG. 1 to perform the function of the first network device in the foregoing method embodiment.
  • the base station 700 may include one or more radio frequency units, such as a remote radio unit (RRU) 701 and one or more baseband units (BBU) (also called a digital unit, DU) 702.
  • RRU 701 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc. It may include at least one antenna 7011 and a radio frequency unit 7012.
  • the RRU 701 part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals, for example, for sending the first indication information described in the above embodiment to the terminal device.
  • the BBU 702 part is mainly used for baseband processing and controlling the base station.
  • the RRU 701 and the BBU 702 may be physically arranged together, or may be physically separated, that is, distributed base stations.
  • the BBU 702 is the control center of the base station, and may also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, and so on.
  • the BBU (processing unit) 702 may be used to control the base station to perform the operation flow on the network device in the above method embodiments.
  • the BBU 702 may be composed of one or more boards.
  • the multiple boards may jointly support a wireless access network (such as an LTE network) with a single access indication, or may support different access standards.
  • Wireless access network (such as LTE network, 5G network or other networks).
  • the BBU 702 further includes a memory 7021 and a processor 7022.
  • the memory 7021 is used to store necessary instructions and data.
  • the memory 7021 stores the correspondence between the codebook index and the precoding matrix in the foregoing embodiment.
  • the processor 7022 is used to control the base station to perform necessary actions, for example, to control the base station to perform the operation flow on the network device in the foregoing method embodiment.
  • the memory 7021 and the processor 7022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It is also possible that multiple boards share the same memory and processor. In addition, each board can also be equipped with necessary circuits
  • Embodiments of the present application also provide a computer-readable storage medium, in which computer-readable instructions are stored.
  • the computer reads and executes the computer-readable instructions, the computer is allowed to execute any of the foregoing method embodiments In the first network device side.
  • An embodiment of the present application provides a computer program product, which, when a computer reads and executes the computer program product, causes the computer to execute the method on the first network device side in any of the foregoing method embodiments.
  • An embodiment of the present application provides a chip connected to a memory, for reading and executing a software program stored in the memory, so as to implement the method on the first network device side in any of the above method embodiments.
  • An embodiment of the present application provides a computer-readable storage medium on which instructions are stored, and when the instructions are executed, the method on the second network device side in the foregoing method embodiment is executed.
  • An embodiment of the present application provides a computer program product containing an instruction.
  • the instruction is executed, the method on the second network device side in the foregoing method embodiment is executed.
  • An embodiment of the present application provides a chip that is connected to a memory and used to read and execute a software program stored in the memory to implement the method on the second network device side in any of the foregoing method embodiments.
  • An embodiment of the present application provides a communication system.
  • the system includes a first network device and a second network device, where the first network device may be used to perform the method on the first network terminal device side in any of the foregoing method embodiments, the second The network device may be used to execute the method on the second network device side in any of the foregoing method embodiments.
  • processors mentioned in the embodiments of the present application may be a central processing unit (CPU), and may also be other general-purpose processors, digital signal processors (DSPs), and special-purpose integrated circuits (DSPs) application, specific, integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electronically Erasable programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (random access memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • synchronous RAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • double data SDRAM double data SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM synchronous connection dynamic random access memory
  • direct RAMbus RAM direct RAMbus RAM, DR RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a division of logical functions.
  • there may be other divisions for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in electrical, mechanical, or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

一种异系统切换方法及装置。其中方法包括：第一网络设备接收第二网络设备发送的第一信息和第二信息，其中第一信息和第二信息分别用于指示终端设备在异系统切换前接入的主载波小区和一个或多个辅载波小区，第一网络设备将主载波小区配置为终端设备在异系统切换后接入的辅小区组中的主小区，将辅载波小区配置为辅小区组中的辅小区，并将第三信息通过第二网络设备发送给终端设备，以指示辅小区组中的主小区和辅小区。如此，终端设备在进行异系统切换后仍可与切换前的主载波小区和辅载波小区保持通信连接，从而有效避免因异系统切换导致辅载波小区被释放，终端设备传输速率下降的技术问题，确保终端设备数据传输的连续性。

Description

一种异系统切换方法及装置 技术领域
本申请涉及无线通信技术领域，特别涉及一种异系统切换方法及装置。
背景技术
4G长期演进(long term evolution，LTE)和5G新空口(new radio，NR)都是3GPP规范定义的通信制式，当同时支持两种通信制式的终端设备(user equipment，UE)在网络中移动时，由于两种通信制式的覆盖区域和布网规划的不同，为了保持处于连接态的UE的业务连续性，网络设备会控制UE在LTE制式和NR制式之间进行异系统切换。
载波聚合(carrier aggregation，CA)技术是一种将成员载波聚合在一起，增加系统带宽，提高上下行传输速率的方法。现有技术中，UE在接入支持5G NR通信制式的网络设备时，若该支持5G NR通信制式的网络设备采用载波聚合技术为UE配置了辅载波小区，当UE从该支持5G NR通信制式的网络设备向另一支持4G LTE通信制式的网络设备进行异系统切换时，原先配置的辅载波小区将被释放，进而会导致UE传输速率下降。
发明内容
本申请提供一种异系统切换方法及装置，用以解决现有技术中UE在不同通信制式的网络设备之间进行异系统切换时，传输速率下降的技术问题。
第一方面，本申请实施例提供一种异系统切换方法，该方法可由第一网络设备执行，该方法包括：第一网络设备接收第二网络设备发送的第一信息和第二信息，所述第一信息用于指示终端设备在异系统切换前接入的主载波小区，所述第二信息用于指示所述终端设备在异系统切换前接入的一个或多个辅载波小区；所述第一网络设备将所述第一信息指示的主载波小区配置为所述终端设备在异系统切换后接入的辅小区组SCG中的主小区，将所述第二信息指示的全部或部分辅载波小区配置为所述SCG中的辅小区；所述第一网络设备将第三信息通过所述第二网络设备发送给所述终端设备，所述第三信息用于指示所述SCG中的主小区和辅小区。
本申请实施例中，第一网络设备可接收第二网络设备发送的第一信息和第二信息，并根据该第一信息和第二信息配置终端设备在进行异系统切换后接入的辅小区组，其中，第一信息所指示的终端设备在异系统切换前接入的主载波小区被配置为该辅小区组中的主小区，第二信息所指示的终端设备在异系统切换前接入的辅载波小区被配置为该辅小区组中的辅小区，如此，终端设备在进行异系统切换后仍可与切换前的主载波小区和辅载波小区保持通信连接，从而有效避免因异系统切换过程中辅载波小区被释放，而导致终端设备传输速率下降的技术问题，确保终端设备数据传输的连续性。
在一种可能的设计中，所述第一网络设备将所述第一信息指示的主载波小区配置为所述终端设备在异系统切换后接入的辅小区组SCG中的主小区，将所述第二信息指示的全部或部分辅载波小区配置为所述SCG中的辅小区之前，所述第一网络设备还可以向所述第二网络设备发送第四信息，所述第四信息用于指示所述第一网络设备根据所述第一信息和所述第二信息确定的用于构成SCG的各个候选小区；所述第一网络设备接收所述第二网络设 备发送的第五信息；所述第五信息用于指示所述第二网络设备根据所述各个候选小区确定的SCG，所述SCG的辅小区包括所述一个或多个辅载波小区中的至少一个辅载波小区。
本申请实施例中，第一网络设备可直接将终端设备在异系统切换前接入的辅载波小区配置为辅小区组中的辅小区，也可以通过与第二网络设备交互辅小区组中的候选小区，将部分辅载波小区配置为异系统切换后将接入的辅小区组中的辅小区，如此，可有效提高系统的频谱资源利用效率，增加辅小区组配置的灵活性。
在一种可能的设计中，所述第一网络设备可以接收核心网网元发送的所述第一信息和所述第二信息，所述第一信息和所述第二信息是所述第二网络设备发送给所述核心网网元的；所述第一网络设备还可以接收所述第二网络设备直接发送的所述第一信息和所述第二信息。
本申请实施例中，根据第一网络设备与第二网络设备之间可以直接通信，也可以通过核心网网元进行间接通信，从而有效提高本申请实施例中异系统切换方法的适用性。
在一种可能的设计中，所述第一网络设备可以为支持长期演进LTE通信系统的网络设备，所述第二网络设备可以为支持新无线NR通信系统的网络设备。
第二方面，本申请实施例还提供另一种异系统切换方法，该方法可由第二网络设备执行，该方法包括：第二网络设备获取第一信息和第二信息，并向第一网络设备发送所述第一信息和所述第二信息，所述第一信息用于指示终端设备在异系统切换前接入的主载波小区，所述第二信息用于指示所述终端设备在异系统切换前接入的一个或多个辅载波小区；所述第二网络设备接收所述第一网络设备发送的第三信息，并将所述第三信息发送给所述终端设备，所述第三信息用于指示所述终端设备在异系统切换后接入的辅小区组SCG中的主小区与辅小区，所述主小区为所述第一信息指示的主载波小区，所述辅小区包括所述第二信息指示的全部或部分辅载波小区。
本申请实施例中，第二网络设备可向第一网络设备发送第一信息和第二信息，通过该第一信息和第二信息向第一网络设备指示终端设备在异系统切换前接入的主载波小区和辅载波小区，以使第一网络设备可根据该第一信息和第二信息配置终端设备在进行异系统切换后接入的辅小区组，将终端设备在异系统切换前接入的主载波小区被配置为辅小区组中的主小区，将终端设备在异系统切换前接入的辅载波小区被配置为该辅小区组中的辅小区。如此，终端设备在进行异系统切换后仍可与切换前的主载波小区和辅载波小区保持通信连接，从而有效避免因异系统切换过程中辅载波小区被释放，而导致终端设备传输速率下降的技术问题，确保终端设备数据传输的连续性。
在一种可能的设计中，所述第二网络设备向第一网络设备发送所述第一信息和所述第二信息之后，接收所述第一网络设备发送的第三信息之前，所述第二网络设备还可以接收所述第一网络设备发送的第四信息，所述第四信息用于指示所述第一网络设备根据所述第一信息和所述第二信息确定的用于构成SCG的各个候选小区；所述第二网络设备向所述第一网络设备发送第五信息，所述第五信息用于指示所述第二网络设备根据所述各个候选小区确定的SCG，所述SCG的辅小区包括所述一个或多个辅载波小区中的至少一个辅载波小区。
本申请实施例中，第二网络设备可接收第一网络设备发送的第四信息，根据第一网络设备在第四信息中指示的辅小区组中的各个候选小区，将终端设备在异系统切换前接入的辅载波小区中的至少一个辅载波小区配置为辅小区组中的辅小区，从而有效提高系统的频 谱资源利用效率，增加辅小区组配置的灵活性。
在一种可能的设计中，所述第二网络设备可以将所述第一信息和所述第二信息发送给核心网网元，通过所述核心网网元将所述第一信息和所述第二信息发送给第一网络设备；所述第二网络设备还可以将所述第一信息和所述第二信息直接发送给所述第一网络设备。
本申请实施例中，根据第一网络设备与第二网络设备之间可以直接通信，也可以通过核心网网元进行间接通信，从而有效提高本申请实施例中异系统切换方法的适用性。
在一种可能的设计中，所述第二网络设备可以为支持新无线NR通信系统的网络设备，所述第一网络设备可以为支持长期演进LTE通信系统的网络设备。
第三方面，本申请实施例提供一种装置，所述装置具有实现上述第一方面或第一方面的任一种可能的设计中第一网络设备的功能，该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现，所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，所述装置的结构中包括处理模块和收发模块，所述处理模块被配置为支持该装置执行上述第一方面或第一方面的任一种设计中相应的方法步骤。所述收发模块用于支持该装置与第二网络设备或者其他通信设备之间的通信。所述装置还可以包括存储模块，所述存储模块与处理模块耦合，其保存有所述装置必要的程序指令和数据。作为一种示例，处理模块可以为处理器，通信模块可以为收发器，存储模块可以为存储器。
第四方面，本申请实施例提供一种装置，所述装置具有实现上述第二方面或第二方面的任一种可能的设计中第二网络设备的功能，该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现，所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，所述装置的结构中包括处理模块和收发模块，所述处理模块被配置为支持该装置执行上述第二方面或第二方面的任一种设计中相应的方法步骤。所述收发模块用于支持该装置与第一网络设备或者其他通信设备之间的通信。所述装置还可以包括存储模块，所述存储模块与处理模块耦合，其保存有所述装置必要的程序指令和数据。作为一种示例，处理模块可以为处理器，通信模块可以为收发器，存储模块可以为存储器。
第五方面，本申请实施例提供一种计算机可读存储介质，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机可以执行上述第一方面或第二方面中任一种可能的设计中的方法。
第六方面，本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机可以执行上述第一方面或第二方面中任一种可能的设计中的方法。
第七方面，本申请实施例提供一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以实现上述第一方面或第二方面中任一种可能的设计中的方法。第八方面，本申请实施例提供一种通信系统，所述通信系统包括上述第一网络设备和第二网络设备，其中所述第一网络设备用于执行上述第一方面或第一方面的任一种设计中相应的方法步骤，所述第二网络设备用于执行上述第二方面或第二方面的任一种设计中相应的方法步骤。
附图说明
图1为本申请实施例适用的一种网络架构的示意图；
图2为本申请实施例提供的一种异系统切换方法的流程示意图；
图3为本申请具体实施例一中提供的切换流程图；
图4为本申请具体实施例二中提供的切换流程图；
图5为本申请实施例中提供的一种装置的结构示意图；
图6为本申请实施例中提供的另一种装置的结构示意图；
图7为本申请实施例中提供的又一种装置的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面结合说明书附图对本申请实施例进行具体描述。需要说明的是，本申请的实施方式部分使用的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)终端设备，包括向用户提供语音和/或数据连通性的设备，例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。该终端设备可以包括用户设备(user equipment，UE)、无线终端设备、移动终端设备、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point，AP)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如，可以包括移动电话(或称为“蜂窝”电话)，具有移动终端设备的计算机，便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，智能穿戴式设备等。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification，RFID)、传感器、全球定位系统(global positioning system，GPS)、激光扫描器等信息传感设备。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
2)网络设备，例如包括基站(例如，接入点)，可以是指接入网中在空口通过一个或多个小区与无线终端设备通信的设备。网络设备可用于将收到的空中帧与网际协议(IP)分组进行相互转换，作为终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括IP网络。网络设备还可协调对空口的属性管理。例如，网络设备可以包括长期演进(long term evolution，LTE)系统或演进的LTE系统(LTE-Advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，或者也可以包括第五代移动通信技术(fifth generation，5G)新无线(new radio，NR)系统中的下一代节点B(next  generation node B，gNB)或者也可以包括云接入网(cloud radio access network，CloudRAN)系统中的集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)，本申请实施例并不限定。
3)载波聚合，载波聚合是指网络设备为一个终端设备配置多个载波，终端设备和网络设备利用多个载波共同进行数据传输的技术。多个载波中一般包括一个主载波(primary carrier component，PCC)、一个或多个辅载波(secondary carrier component，SCC)。工作在主载波的小区为主载波小区(primary carrier cell，PCell)，PCell是终端初始接入时的小区，PCell所在基站负责与终端之间进行无线资源控制(radio resource control，RRC)通信。工作在辅载波的小区为辅载波小区(secondary carrier cell，SCell)，SCell可以为终端提供额外的无线资源。
4)双连接(dual connectivity，DC)，双连接是指终端设备同时与至少两个网络设备建立并保持通信连接，使用该至少两个网络设备提供的无线资源进行数据传输的技术。该至少两个网络设备通过非理想回程链路相连，并且可以是支持不同的接入技术的网络设备。在双连接下包括两个小区组，分别是主小区组(master cell group，MCG)和辅小区组(secondary cell group，SCG)，MCG和SCG均可包括一个主小区和一个或多个辅小区。相应地，至少两个网络设备中负责管理MCG的网络设备为主网络设备，用于提供终端设备与核心网之间的控制面连接，负责管理SCG的网络设备为辅网络设备，用于为终端提供额外的无线资源。
6)异系统切换，异系统切换是指终端设备在两种不同通信制式的网络之间进行的切换，例如，终端设备从原来接入的LTE网络的小区切换到5G网络的小区，或者也可以从原来接入的5G网络的小区切换到LTE网络的小区等。
7)本申请实施例中的术语“系统”和“网络”可被互换使用。“多条”是指两个或两个以上，鉴于此，本申请实施例中也可以将“多条”理解为“至少两条”。“至少两条”，可以理解为两条或更多条，例如理解为两条、三条或更多条。“至少一条”，可理解为一条或多条，例如理解为一条、两条或更多条。同理，对于“多个”等描述的理解，也是类似的。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，字符“/”，如无特殊说明，一般表示前后关联对象是一种“或”的关系。
在下文的描述中，除非有相反的说明，“第一”、“第二”等序数词，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
本申请实施例提供的技术方案可以应用于5G系统、演进的长期演进(advanced long term evolution，LTE-A)系统等。此外，该技术方案还可以适用于面向未来的通信技术。应理解，本申请实施例描述的网络结构是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变，本申请实施例提供的技术方案对于类似的技术问题同样适用。
图1示例性示出了本申请实施例的一种应用场景，或者说是本申请实施例适用的一种网络架构，该网络架构可为下一代无线接入网(next generation radio access networks，NG-RAN)系统的一种网络架构。如图1所示，该网络架构中的5G基站(5G eNodeB，gNB)提供面向终端设备的NR用户平面和控制平面协议，且gNB连接到5G系统的核心网，非5G基站(non 5G eNodeB，ng-eNB)提供面向终端设备的演进的全球陆地无线接入网络 (evolved-universal terrestrial radio access network，E-UTRAN)用户平面和控制平面协议，且ng-eNB也连接到5G系统的核心网。gNB与ng-eNB之间通过Xn接口互连，且gNB与ng-eNB均通过NG接口连接到5G核心网(5GC)中的接入和移动性管理功能(access and mobility management function，AMF)或用户面功能(user plane function，UPF)。虽然在图4中未画出终端设备，但实际上图4中的每个gNB或者ng-gNB都可能服务于一个或多个终端设备，本申请实施例所提供的技术方案就可以通过服务于终端设备的gNB和/或服务于终端设备的ng-gNB执行。
基于上述网络架构，图2示例性示出了本申请实施例提供的一种异系统切换方法，如图2所示，该方法包括：
步骤S201：第二网络设备获取第一信息和第二信息，并向第一网络设备发送该第一信息和该第二信息。其中，第一网络设备为终端设备在进行异系统切换后将接入的网络设备，第二网络设备为终端设备在进行异系统切换前接入的网络设备，第一信息用于指示终端设备在异系统切换前接入的主载波小区，第二信息用于指示终端设备在异系统切换前接入的一个或多个辅载波小区；
在步骤S201的具体实施中，终端设备处于接入第二网络设备的状态，第二网络设备可同时使用该主载波小区和一个或多个辅载波小区的无线资源为终端设备传输数据。第二网络设备若确定将触发终端设备切换到第一网络设备，则可在触发终端设备进行异系统切换前，将第一信息和第二信息发送给第二网络设备，以通知第一网络设备该终端设备在切换前进行载波聚合使用的主载波小区和辅载波小区的信息。在一种可能的设计中，第一信息可包括主载波小区的小区标识，第二信息可包括一个或多个辅载波小区的小区标识。
需要说明的是，本申请实施例中所涉及的第一网络设备和第二网络设备为符合不同通信制式的网络设备。具体来说，第一网络设备为支持LTE通信系统的网络设备，第二网络设备为支持5G NR通信系统的网络设备。在一个示例中，第一网络设备可以是NG-RAN系统中的ng-eNB网络节点，第二网络设备可以是NG-RAN系统中的gNB网络节点。
第一网络设备和第二网络设备可以均通过NG接口连接到核心网网元，该核心网网元可为图1中的网络结构中所示出的5G核心网中的AMF或UPF。根据第一网络设备和第二网络设备在NG-RAN网络中所处的位置不同，第一网络设备与第二网络设备之间可能存在直接互联的Xn接口，也可能不存在直接互联的Xn接口。若第一网络设备和第二网络之间存在Xn接口，则表示第一网络设备与第二网络设备可以直接通信，例如，第二网络设备可直接将第一信息和第二信息发送给第一网络设备，而无需经过AMF或UPF转发。若第一网络设备和第二网络设备之间不存在Xn接口，则表示第一网络设备和第二网络设备必须通过AMF或UPF转发才能实现间接通信，例如，第二网络设备可通过与AMF或UPF之间的NG接口，将第一信息和第二信息发送给AMF或UPF，经由该AMF或UPF通过该AMF或UPF网元与第一网络设备之间的NG接口，再将第一信息和第二信息发送给第一网络设备。应理解，在第一网络设备和第二网络设备存在直接互联的Xn接口的情况下，第二网络设备也可以先将第一信息和第二信息发送给AMF或UPF，由AMF或UPF再发送给第一网络设备，本申请实施例对此不作具体限定。而且，当第一网络设备与第二网络设备确定交互方式后，即指进行直接通信或间接通信等方式，第一网络设备与第二网络设备之间也可以交互其他信息，例如，后文会提到的第三信息、第四信息、第五信息等，也可以采用相同的交互方式进行收发，本申请实施例对此不再赘述。
步骤S202：第一网络设备接收第二网络设备发送的第一信息和第二信息；
步骤S203：第一网络设备将第一信息中指示的主载波小区配置为终端设备在异系统切换后接入的辅小区组SCG中的主小区，将第二信息中指示的全部或部分辅载波小区配置为终端设备在异系统切换后接入的SCG中的辅小区；
在步骤S202和步骤S203的具体实施中，第一网络设备可接收第二网络设备发送的第一信息和第二信息，并将第一信息中指示的终端设备在异系统切换前接入的主载波小区配置为：终端设备在异系统切换后将接入的SCG中的主小区，将第二信息中指示的终端设备在异系统切换前接入的全部或部分辅载波小区配置为：终端设备在异系统切换后将接入的SCG中的辅小区。
需要说明的是，本步骤中涉及到的主载波小区、辅载波小区与SCG中的主小区、辅小区是不同通信技术中的概念，主载波小区和辅载波小区分别对应于第二网络设备在采用载波聚合技术为终端设备传输数据时所使用的主载波和辅载波，而主小区和辅小区则是第一网络设备在采用双连接技术为终端设备传输数据时所配置的辅小区组中的主小区和辅小区，且该主小区和辅小区均是以为终端设备提供额外的无线资源为目的而设置的。
由于终端设备在异系统切换前可与主载波小区以及一个或多个辅载波小区保持通信连接，而在异系统切换后终端设备除了与被设置在SCG中的各个小区保持通信连接外，还将接入第一网络设备下的小区，使用该小区中的无线资源，并由该小区对终端设备进行移动性管理。这里所述的第一网络设备下的小区是指终端设备在异系统切换后连接的主小区组MCG，该MCG可包括一个或多个小区，为了描述简便，仅以一个小区作为示例说明。
更进一步地，为了使终端设备在切换前后的传输速率保持稳定，第一网络设备可根据终端设备的传输带宽需求将原来的一个或多个辅载波小区中的全部或部分辅载波小区配置为SCG中的辅小区。
步骤S204：第一网络设备将第三信息通过第二网络设备发送给终端设备，该第三信息用于指示第一网络设备配置的SCG中的主小区和辅小区。
在一种可能的设计中，第一网络设备在配置双连接的SCG之前，即在执行步骤203之前，还可以向第二网络设备发送第四信息，该第四信息用于指示第一网络设备根据第一信息和第二信息指示出的主载波小区和一个或多个辅载波小区而确定的，用于构建SCG的各个候选小区，例如，第四信息中可包括上述各个候选小区的小区标识。
如此，第二网络设备在接收到该第四信息后，可根据第一网络设备提供的SCG的各个候选小区、终端设备当前接入的主载波小区和辅载波小区，以及第二网络设备下的各个小区，共同确定出SCG中的各个小区，并将该SCG的信息(例如SCG中各个小区的小区标识)携带在第五信息中发送给第一网络设备。
本申请实施例中，第五信息用于指示第二网络设备根据各个候选小区而确定的、许可第一网络设备配置异系统双连接使用的SCG，该SCG中的主小区为终端设备在异系统切换前进行载波聚合时接入的主载波小区，SCG中的辅小区可以为一个或多个，其中可包括终端设备在异系统切换前进行载波聚合时连接的至少一个辅载波小区，和/或，第一网络设备的小区中区别于上述主载波小区和辅载波小区的其他小区。
进而，第一网络设备接收到第五信息后，可根据第二网络设备在该第五信息中指示的SCG的主小区和辅小区，进行SCG的配置。
在步骤S204的具体实施中，第一网络设备在配置完成后，可将第三信息通过第二网 络设备发送给终端设备，该第三信息用于指示所述终端设备在异系统切换后接入的SCG中主小区与辅小区。也就是说，由于终端设备在异系统切换前接入在第二网络设备，因此，第一网络设备可将第三信息发送给第二网络设备，由第二网络设备再将第三信息发送给终端设备，以通知终端设备在进行异系统切换时根据该第三信息配置SCG。之后，第二网络设备可向终端设备发送RRC连接重配置请求消息，以触发终端设备开始进行切换。在一种可能的设计中，该第三信息可以为第一网络设备配置SCG的配置编码信息，如此，当第二网络设备触发终端设备进行异系统切换时，终端设备可根据第三信息中指示的配置编码信息直接配置双连接的SCG，从而确保终端设备切换前后数据传输的连续性。
本申请实施例中，终端设备在进行异系统切换前，第二网络设备可通过载波聚合技术为终端设备配置一个主载波小区和一个或多个辅载波小区，终端设备同时与这一个主载波小区和一个或多个辅载波小区建立通信连接。为了使终端设备在异系统切换前后的数据传输连续不间断且传输速率保持稳定，第二网络设备在触发终端设备进行异系统切换前，可将分别用于指示上述主载波小区和辅载波小区的第一信息和第二信息发送给第一网络设备，以使第一网络设备根据该第一信息和第二信息配置终端设备在异系统切换后将接入的SCG。其中，第一网络设备可将第一信息所指示的主载波小区配置为SCG中的主小区，将第二信息所指示的辅载波小区被配置为SCG中的辅小区。如此，终端设备在进行异系统切换后可使用双连接技术同时连接第一网络设备的小区和该SCG中的各个小区，从而有效避免因异系统切换过程中辅载波小区被释放，而导致终端设备传输速率下降的技术问题。
下面结合两个具体实施例来详细说明本申请实施例提供的技术方案。
图3为本申请的具体实施例一提供的一种通过NG接口进行异系统切换的切换流程图，在图3中，UE由初始接入的gNB异系统切换到ng-eNB。如图3所示，该切换过程具体包括：
1、源gNB触发UE通过NG接口向4G LTE通信系统进行异系统切换，源gNB向AMF发送切换请求(handover required)消息，并在该handover required消息中的源至目标的透明容器(source to target transparent container)信元中携带源gNB做载波聚合的主载波小区与辅载波小区的信息，例如可以是主载波小区和辅载波小区的标识。
2、AMF在接收到handover required消息后，将其中的source to target transparent container信元通过切换请求(handover request)消息发送给目标ng-eNB。
3、目标ng-eNB使用源gNB传递的载波聚合信息(即主载波小区与辅载波小区的信息)进行NG-RAN下的4G 5G双连接(NG-RAN E-UTRA-NR dual connectivity，NGEN-DC)SCG的添加。
4、SCG添加成功后，目标ng-eNB将携带了SCG配置信息的RRC重配(reconfiguration)消息封装进切换请求响应(handover request acknowledge)消息的目标至源的透明容器(target to source transparent container)信元中发给给AMF，由AMF通过切换命令(handover command)消息带回给源gNB，用于通知UE进行异系统切换时直接配置SCG。
5、源gNB将RRC reconfiguration消息发送给UE，触发UE进行异系统切换，UE使用RRC reconfiguration消息中的SCG配置信息配置SCG，配置完成后，发送RRC重配完成消息给目标ng-eNB。
6、目标ng-eNB向AMF发送切换通知消息，AMF向源gNB发送UE上下文释放消息。
图4为本申请的具体实施例二提供的一种通过Xn接口进行异系统切换的切换流程图， 在图4中，UE同样由初始接入的gNB切换到ng-eNB。如图4所示，该切换过程具体包括：
1、源gNB触发通过Xn接口向4G LTE通信系统进行异系统切换，源gNB向目标ng-eNB发送切换请求(handover request)消息，并在handover request消息的RRC上下文(RRC context)信元中携带源gNB做载波聚合的主载波小区与辅载波小区的信息，例如可以是主载波小区和辅载波小区的标识。
2、目标ng-eNB使用源gNB传递的载波聚合信息(即主载波小区与辅载波小区的信息)进行NGEN-DC SCG的添加。
3、SCG添加成功后，目标ng-eNB将携带了SCG配置信息的RRC重配(reconfiguration)消息封装进切换请求响应(handover request acknowledge)消息的目标节点至源节点的透明容器(target NG-RAN node to source NG-RAN node transparent container)信元中带回给源gNB，用于通知UE进行异系统切换时直接配置SCG。
4、源gNB将RRC reconfiguration消息发送给UE，触发UE进行异系统切换，并使用RRC reconfiguration消息中的SCG配置信息配置SCG，UE配置完成后，发送RRC重配完成消息给目标ng-eNB。
5、目标ng-eNB向源gNB发送UE上下文释放消息。
基于相同的发明构思，本申请实施例还提供一种装置。如图5所示，为本申请实施例提供的一种装置的结构示意图，该装置可以执行上述各方法实施例中第一网络设备或者第二网络设备的动作，该装置500包括：处理模块510和收发模块520。
其中，装置500执行第一网络设备侧的动作时，处理模块510和收发模块520分别执行如下步骤：
收发模块520接收第二网络设备发送的第一信息和第二信息，所述第一信息用于指示终端设备在异系统切换前接入的主载波小区，所述第二信息用于指示所述终端设备在异系统切换前接入的一个或多个辅载波小区；处理模块510将所述第一信息指示的主载波小区配置为所述终端设备在异系统切换后接入的辅小区组SCG中的主小区，将所述第二信息指示的辅载波小区配置为所述SCG中的辅小区；收发模块520将第三信息通过所述第二网络设备发送给所述终端设备，所述第三信息用于指示所述SCG中的主小区和辅小区。
装置500执行第二网络设备侧的动作时，处理模块510和收发模块520分别执行如下步骤：
处理模块510获取第一信息和第二信息；收发模块520向第一网络设备发送所述第一信息和所述第二信息，所述第一信息用于指示终端设备在异系统切换前接入的主载波小区，所述第二信息用于指示所述终端设备在异系统切换前接入的一个或多个辅载波小区；以及，用于接收所述第一网络设备发送的第三信息，并将所述第三信息发送给所述终端设备，所述第三信息用于指示所述终端设备在异系统切换后接入的辅小区组SCG中主小区与辅小区，所述主小区为所述第一信息指示的主载波小区，所述辅小区包括所述第二信息指示的全部或部分辅载波小区。
应理解，本发明实施例中的处理模块510可以由处理器或处理器相关电路组件实现，收发模块520可以由收发器或收发器相关电路组件实现。
如图6所示，为本申请实施例中提供的装置的另一种结构示意图。该装置600包括处理器610，存储器620与收发器630，其中，存储器620中存储指令或程序，处理器610用于执行存储器620中存储的指令或程序。存储器620中存储的指令或程序被执行时，该 处理器610用于执行上述实施例中处理模块510执行的操作，收发器630用于执行上述实施例中收发模块520执行的操作。
本申请实施例还提供一种通信装置，该通信装置可以是芯片、网络设备(如基站)、电路或者其他网络设备等。所述通信装置包括一个或多个处理器，所述一个或多个处理器可实现图2所示的方法实施例中第一网络设备或第二网络设备侧所执行的动作。
当该通信装置为网络设备时，图7示出了一种网络设备的结构示意图，如可以为基站的结构示意图。如图7所示，该基站可应用于如图1所示的系统中，执行上述方法实施例中第一网络设备的功能。基站700可包括一个或多个射频单元，如远端射频单元(remote radio unit,RRU)701和一个或多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)702。所述RRU 701可以称为收发单元、收发机、收发电路、或者收发器等等，其可以包括至少一个天线7011和射频单元7012。所述RRU 701部分主要用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端设备发送上述实施例中所述的第一指示信息。所述BBU 702部分主要用于进行基带处理，对基站进行控制等。所述RRU 701与BBU 702可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述BBU 702为基站的控制中心，也可以称为处理单元，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等。例如所述BBU(处理单元)702可以用于控制基站执行上述方法实施例中关于网络设备的操作流程。
在一个示例中，所述BBU 702可以由一个或多个单板构成，多个单板可以共同支持单一接入指示的无线接入网(如LTE网)，也可以分别支持不同接入制式的无线接入网(如LTE网，5G网或其他网)。所述BBU 702还包括存储器7021和处理器7022，所述存储器7021用于存储必要的指令和数据。例如存储器7021存储上述实施例中的码本索引与预编码矩阵的对应关系。所述处理器7022用于控制基站进行必要的动作，例如用于控制基站执行上述方法实施例中关于网络设备的操作流程。所述存储器7021和处理器7022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路
本申请实施例还提供一种计算机可读存储介质，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行上述任一方法实施例中第一网络设备侧的方法。
本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述任一方法实施例中第一网络设备侧的方法。
本申请实施例提供一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以实现上述任一方法实施例中第一网络设备侧的方法。
本申请实施例提供一种计算机可读存储介质，其上存储有指令，该指令被执行时执行上述方法实施例中第二网络设备侧的方法。
本申请实施例提供一种包含指令的计算机程序产品，该指令被执行时执行上述方法实施例中第二网络设备侧的方法。
本申请实施例提供一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以实现上述任一方法实施例中第二网络设备侧的方法。
本申请实施例提供一种通信系统，该系统包括第一网络设备和第二网络设备，其中，第一网络设备可用于执行上述任一方法实施例中第一网络终端设备侧的方法，第二网络设 备可用于执行上述任一方法实施例中第二网络设备侧的方法。
应理解，本申请实施例中提及的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
还应理解，本文中涉及的第一、第二、第三、第四以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请的范围。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间 接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (18)

  1. 一种异系统切换方法，其特征在于，所述方法包括：
    第一网络设备接收第二网络设备发送的第一信息和第二信息，所述第一信息用于指示终端设备在异系统切换前接入的主载波小区，所述第二信息用于指示所述终端设备在异系统切换前接入的一个或多个辅载波小区；
    所述第一网络设备将所述第一信息指示的主载波小区配置为所述终端设备在异系统切换后接入的辅小区组SCG中的主小区，将所述第二信息指示的全部或部分辅载波小区配置为所述SCG中的辅小区；
    所述第一网络设备将第三信息通过所述第二网络设备发送给所述终端设备，所述第三信息用于指示所述SCG中的主小区和辅小区。
  2. 根据权利要求1所述的方法，其特征在于，所述第一网络设备将所述第一信息指示的主载波小区配置为所述终端设备在异系统切换后接入的辅小区组SCG中的主小区，将所述第二信息指示的全部或部分辅载波小区配置为所述SCG中的辅小区之前，还包括：
    所述第一网络设备向所述第二网络设备发送第四信息，所述第四信息用于指示所述第一网络设备根据所述第一信息和所述第二信息确定的用于构成SCG的各个候选小区；
    所述第一网络设备接收所述第二网络设备发送的第五信息；所述第五信息用于指示所述第二网络设备根据所述各个候选小区确定的SCG，所述SCG的辅小区包括所述一个或多个辅载波小区中的至少一个辅载波小区。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一网络设备接收第二网络设备发送的第一信息和第二信息，包括：
    所述第一网络设备接收核心网网元发送的所述第一信息和所述第二信息，所述第一信息和所述第二信息是所述第二网络设备发送给所述核心网网元的；或者，
    所述第一网络设备接收所述第二网络设备直接发送的所述第一信息和所述第二信息。
  4. 根据权利要求3所述的方法，其特征在于，所述第一网络设备为支持长期演进LTE通信系统的网络设备，所述第二网络设备为支持新无线NR通信系统的网络设备。
  5. 一种异系统切换方法，其特征在于，所述方法包括：
    第二网络设备获取第一信息和第二信息，并向第一网络设备发送所述第一信息和所述第二信息，所述第一信息用于指示终端设备在异系统切换前接入的主载波小区，所述第二信息用于指示所述终端设备在异系统切换前接入的一个或多个辅载波小区；
    所述第二网络设备接收所述第一网络设备发送的第三信息，并将所述第三信息发送给所述终端设备，所述第三信息用于指示所述终端设备在异系统切换后接入的辅小区组SCG中的主小区与辅小区，所述主小区为所述第一信息指示的主载波小区，所述辅小区包括所述第二信息指示的全部或部分辅载波小区。
  6. 根据权利要求5所述的方法，其特征在于，所述第二网络设备向第一网络设备发送所述第一信息和所述第二信息之后，接收所述第一网络设备发送的第三信息之前，还包括：
    所述第二网络设备接收所述第一网络设备发送的第四信息，所述第四信息用于指示所述第一网络设备根据所述第一信息和所述第二信息确定用于构成SCG的各个候选小区；
    所述第二网络设备向所述第一网络设备发送第五信息，所述第五信息用于指示所述第 二网络设备根据所述各个候选小区确定的SCG，所述SCG的辅小区包括所述一个或多个辅载波小区中的至少一个辅载波小区。
  7. 根据权利要求5或6所述的方法，其特征在于，所述第二网络设备向第一网络设备发送第一信息和第二信息，包括：
    所述第二网络设备将所述第一信息和所述第二信息发送给核心网网元，通过所述核心网网元将所述第一信息和所述第二信息发送给第一网络设备；或者，
    所述第二网络设备将所述第一信息和所述第二信息直接发送给所述第一网络设备。
  8. 根据权利要求7所述的方法，其特征在于，所述第二网络设备为支持新无线NR通信系统的网络设备，所述第一网络设备为支持长期演进LTE通信系统的网络设备。
  9. 一种装置，其特征在于，所述装置包括：
    收发模块，用于接收第二网络设备发送的第一信息和第二信息，所述第一信息用于指示终端设备在异系统切换前接入的主载波小区，所述第二信息用于指示所述终端设备在异系统切换前接入的一个或多个辅载波小区；
    处理模块，用于将所述第一信息指示的主载波小区配置为所述终端设备在异系统切换后接入的辅小区组SCG中的主小区，将所述第二信息指示的全部或部分辅载波小区配置为所述SCG中的辅小区；
    所述收发模块，还用于将第三信息通过所述第二网络设备发送给所述终端设备，所述第三信息用于指示所述SCG中的主小区和辅小区。
  10. 根据权利要求9所述的装置，其特征在于，所述收发模块接收第二网络设备发送的第一信息和第二信息之后，将所述第一信息指示的主载波小区配置为所述终端设备在异系统切换后接入的辅小区组SCG中的主小区，将所述第二信息指示的全部或部分辅载波小区配置为所述SCG中的辅小区之前，还用于：
    向所述第二网络设备发送第四信息，所述第四信息用于指示所述第一网络设备根据所述第一信息和所述第二信息确定的用于构成SCG的各个候选小区；以及，
    接收所述第二网络设备发送的第五信息；所述第五信息用于指示所述第二网络设备根据所述各个候选小区确定的SCG，所述SCG的辅小区包括所述一个或多个辅载波小区中的至少一个辅载波小区。
  11. 根据权利要求9或10所述的装置，其特征在于，所述收发模块具体用于：
    接收核心网网元发送的所述第一信息和所述第二信息，所述第一信息和所述第二信息是所述第二网络设备发送给所述核心网网元的；或者，
    接收所述第二网络设备直接发送的所述第一信息和所述第二信息。
  12. 根据权利要求11所述的装置，其特征在于，所述装置为支持长期演进LTE通信系统的网络设备，所述第二网络设备为支持新无线NR通信系统的网络设备。
  13. 一种装置，其特征在于，所述装置包括：
    处理模块，用于获取第一信息和第二信息；
    收发模块，用于向第一网络设备发送所述第一信息和所述第二信息，所述第一信息用于指示终端设备在异系统切换前接入的主载波小区，所述第二信息用于指示所述终端设备在异系统切换前接入的一个或多个辅载波小区；以及，用于接收所述第一网络设备发送的第三信息，并将所述第三信息发送给所述终端设备，所述第三信息用于指示所述终端设备在异系统切换后接入的辅小区组SCG中主小区与辅小区，所述主小区为所述第一信息指示 的主载波小区，所述辅小区包括所述第二信息指示的全部或部分辅载波小区。
  14. 根据权利要求13所述的装置，其特征在于，所述收发模块还用于：
    向第一网络设备发送所述第一信息和所述第二信息之后，接收所述第一网络设备发送的第三信息之前，接收所述第一网络设备发送的第四信息，所述第四信息用于指示所述第一网络设备根据所述第一信息和所述第二信息确定的用于构成SCG的各个候选小区；
    向所述第一网络设备发送第五信息，所述第五信息用于指示所述装置根据所述各个候选小区确定的SCG，所述SCG的辅小区包括所述一个或多个辅载波小区中的至少一个辅载波小区。
  15. 根据权利要求13或14所述的装置，其特征在于，所述收发模块具体用于：
    将所述第一信息和所述第二信息发送给核心网网元，通过所述核心网网元将所述第一信息和所述第二信息发送给第一网络设备；或者，
    将所述第一信息和所述第二信息直接发送给所述第一网络设备。
  16. 根据权利要求15所述的装置，其特征在于，所述第二网络设备为支持新无线NR通信系统的网络设备，所述第一网络设备为支持长期演进LTE通信系统的网络设备。
  17. 一种通信装置，其特征在于，包括至少一个处理器，所述至少一个处理器与至少一个存储器耦合：
    所述至少一个处理器，用于执行所述至少一个存储器中存储的计算机程序或指令，以使得所述装置执行如权利要求1至8中任一项所述的方法。
  18. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序或指令，当计算机读取并执行所述计算机程序或指令时，使得计算机执行如权利要求1至8中任意一项所述的方法。
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