A secondary cell group configuration method, device, chip and module equipment

Abstract

The application discloses a secondary cell group configuration method, device, chip and module equipment. The method comprises the following steps: a source master base station MN sends a conditional handover request message to a candidate MN; the source MN receives a conditional handover request confirmation message from the candidate MN, wherein the conditional handover request confirmation message comprises configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG; and the source MN sends the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device. Through the configuration method, the terminal device in dual connectivity can be simultaneously configured with the configuration information of the candidate MCG and the configuration information of the candidate SCG, thereby reducing signaling overhead and saving transmission resources.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, in particular to a secondary cell group configuration method and device, a chip and a module equipment. BACKGROUND

[0002] The dual connectivity mechanism enables the terminal device to simultaneously utilize the resources of two base stations (i.e. a master base station and a secondary base station) for data transmission, which not only improves the data throughput rate, but also improves the mobile performance of the terminal device. Among them, the master base station configures a usable master cell group for the terminal device; the secondary base station configures a usable secondary cell group associated with the terminal device, which includes a primary secondary cell and other secondary cells in the secondary cell group. In the mobile process of the terminal device in dual connectivity, the terminal device can switch from the source master base station to the target master base station (or can be understood as the terminal device switches from the source master cell group to the target master cell group), and can also switch from the source secondary base station to the target secondary base station (or can be understood as the terminal device switches from the source secondary cell group to the target secondary cell group).

[0003] In the communication R17 standard, the conditional handover of the master base station side of the terminal device (i.e. the conditional handover of the master cell) and the conditional primary secondary cell handover of the secondary base station side (i.e. the conditional update of the primary secondary cell) cannot be configured at the same time. In other words, if the terminal device in dual connectivity is configured with a candidate master cell group, a candidate secondary cell group cannot be configured. If it is necessary to configure dual connectivity after handover, the terminal device needs to be switched to the target master cell, and then the target master cell configures the secondary cell group. Through such a secondary cell group configuration method, the signaling overhead is increased, the transmission resource is wasted, and the time delay of configuring the secondary cell group is also increased. SUMMARY

[0004] The present application provides a secondary cell group configuration method, device, chip and module equipment, which can simultaneously configure the configuration information of the candidate MCG and the configuration information of the candidate SCG for the terminal device in dual connectivity, which is beneficial to reduce the signaling overhead and save the transmission resource.

[0005] In a first aspect, the present application provides a secondary cell group configuration method, which comprises: sending a conditional handover request message to a candidate master base station MN; receiving a conditional handover request confirmation message from the candidate MN, the conditional handover request confirmation message comprising configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG; and sending the configuration information of the candidate MCG and the configuration information of the candidate SCG to the terminal device.

[0006] Based on the secondary cell group configuration method provided in the first aspect, the configuration information of the candidate SCG can be sent at the same time as the configuration information of the candidate MCG is sent to the terminal device. Through such a SCG configuration method, it is beneficial to reduce the signaling overhead and save the transmission resource.

[0007] In a possible implementation, the capability information of the terminal device is included in the conditional handover request message, and the capability information of the terminal device is used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG. By implementing the possible implementation, the configuration information of the candidate MCG and the configuration information of the candidate SCG are simultaneously sent to the terminal device only when the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG, thereby avoiding waste of resources.

[0008] In a possible implementation, the conditional handover request confirmation message further includes first indication information, the first indication information is used to indicate a configuration mode corresponding to the configuration information of the target side or a configuration mode corresponding to the configuration information of the candidate SCG; the target side includes the candidate MCG and the candidate SCG; the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode or a full configuration mode; and the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode or a full configuration mode.

[0009] In a possible implementation, the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, the source MN sends a notification message to the candidate MN, the notification message is used to notify that the configuration parameters of the source SCG are updated, and the notification message includes the updated configuration parameters of the source SCG.

[0010] In a possible implementation, the source MN receives the updated configuration information of the candidate secondary cell group SCG and the configuration information of the candidate master cell group MCG from the candidate MN, and the updated configuration information of the candidate SCG is set based on the updated configuration parameters of the source SCG.

[0011] In a possible implementation, the configuration information of the candidate SCG is used to indicate whether the conditional handover request confirmation message contains the configuration information of the candidate SCG. By such an implementation method, the parameter configuration mode is explicitly indicated in the interface signaling, and the source MN can know whether the candidate MN side needs to be notified to update the configuration information of the candidate SCG when the configuration parameters of the source side change without analyzing the specific configuration information of the candidate SCG. The source MN realizes that the configuration parameters of the source side SCG change, and needs to timely notify the candidate MN to update the configuration information of the candidate SCG, thereby avoiding that the configuration information of the candidate SCG previously saved by the terminal device is outdated, and avoiding that the terminal device accesses by using the outdated configuration information of the candidate SCG, thereby causing a radio link failure.

[0012] In a second aspect, the present application provides a secondary cell group configuration method, which comprises: receiving a conditional handover request message from a source master base station MN; and sending a conditional handover request acknowledgement message to the source MN, wherein the conditional handover request acknowledgement message comprises configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG.

[0013] The secondary cell configuration method provided in the second aspect has the beneficial effects of the first aspect, and the repeated parts will not be described here.

[0014] In a possible implementation method, the conditional handover request message comprises capability information of the terminal device, and the capability information of the terminal device is used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0015] In a possible implementation method, the conditional handover request acknowledgement message further comprises first indication information, the first indication information is used to indicate a configuration mode corresponding to the configuration information of the target side or a configuration mode corresponding to the configuration information of the candidate SCG; wherein the target side comprises the candidate MCG and the candidate SCG; the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode or a full configuration mode; and the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode or a full configuration mode.

[0016] In a possible implementation method, the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, the candidate MN receives a notification message from the source MN, the notification message is used to notify that the configuration parameters of the source SCG are updated, the notification message comprises the updated configuration parameters of the source SCG; if the updated configuration parameters of the source SCG are associated with the configuration parameters of the candidate SCG, the candidate MN updates the configuration information of the candidate SCG based on the updated configuration parameters of the source SCG; and the candidate MN sends the updated configuration information of the candidate SCG to the source MN.

[0017] In a possible implementation method, the configuration information of the candidate secondary cell group SCG is used to indicate whether the conditional handover request acknowledgement message contains the configuration information of the candidate SCG.

[0018] In a third aspect, the present application provides a secondary cell group configuration method, which comprises: a terminal device receiving configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG from a source master base station MN.

[0019] The secondary cell configuration method provided in the third aspect has the beneficial effects of the first aspect, and the repeated parts will not be described here.

[0020] In a possible implementation, if the terminal device accesses the candidate MN according to the configuration information of the candidate MCG, the terminal device accesses the candidate SCG according to the configuration information of the candidate SCG.

[0021] In a possible implementation, if the terminal device accesses the candidate MN according to the configuration information of the candidate MCG, the terminal device accesses the candidate SCG according to the configuration information of the candidate SCG when the candidate SCG corresponding primary-secondary cell switching condition is met. In other words, in this case, the terminal device determines whether the candidate SCG corresponding primary-secondary cell updating execution condition is met, and accesses the candidate SCG when the candidate SCG corresponding primary-secondary cell updating execution condition is met.

[0022] In a possible implementation, the number of the candidate SCGs is one or more, and each candidate SCG corresponds to a primary-secondary cell switching condition. In other words, if the terminal device receives the configuration information of multiple candidate SCGs, each candidate SCG corresponds to a primary-secondary cell switching condition. After the terminal device accesses the candidate MN according to the configuration information of the candidate MCG, the terminal device accesses a candidate SCG according to the primary-secondary cell switching condition corresponding to the candidate SCG when the primary-secondary cell switching condition corresponding to the candidate SCG is met.

[0023] In a fourth aspect, the present application provides a secondary cell group configuration device, which comprises: a sending unit configured to send a conditional switching request message to a candidate master base station MN; a receiving unit configured to receive a conditional switching request confirmation message from the candidate MN, wherein the conditional switching request confirmation message comprises configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG; and the sending unit is further configured to send the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device.

[0024] In a possible implementation, the conditional switching request message comprises capability information of the terminal device, and the capability information of the terminal device is used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0025] In a possible implementation, the conditional switching request confirmation message further comprises first indication information, and the first indication information is used to indicate a configuration mode corresponding to configuration information of a target side or a configuration mode corresponding to configuration information of the candidate SCG; wherein the target side comprises the candidate MCG and the candidate SCG; the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode or a full configuration mode; and the configuration mode corresponding to the configuration information is an incremental signaling configuration mode or a full configuration mode.

[0026] In a possible implementation, the configuration information of the target side corresponds to an incremental signaling configuration mode, or the configuration information of the candidate SCG corresponds to an incremental signaling configuration mode, and the sending unit is configured to send a notification message to the candidate MN, where the notification message is used to notify that the configuration parameters of the source SCG are updated, and the notification message includes the updated configuration parameters of the source SCG.

[0027] In a possible implementation, the receiving unit is configured to receive the updated configuration information of the candidate secondary cell group (SCG) and the configuration information of the candidate master cell group (MCG) from the candidate MN, and the updated configuration information of the candidate SCG is set based on the updated configuration parameters of the source SCG.

[0028] In a possible implementation, the configuration information of the candidate SCG is used to indicate whether the conditional handover request acknowledgment message includes the configuration information of the candidate SCG.

[0029] In a fifth aspect, the present application provides a secondary cell group configuration device, which includes: a receiving unit configured to receive a conditional handover request message from a source master base station (MN); and a sending unit configured to send a conditional handover request acknowledgment message to the source MN, where the conditional handover request acknowledgment message includes configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG).

[0030] In a possible implementation, the conditional handover request message includes capability information of a terminal device, and the capability information of the terminal device is used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0031] In a possible implementation, the conditional handover request acknowledgment message further includes first indication information, the first indication information is used to indicate a configuration mode corresponding to configuration information of a target side or a configuration mode corresponding to configuration information of a candidate SCG, the target side includes the candidate MCG and the candidate SCG, the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode or a full configuration mode, and the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode or a full configuration mode.

[0032] In a possible implementation method, the device further includes a processing unit, the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, a receiving unit configured to receive a notification message from the source MN, the notification message being used to notify that the configuration parameters of the source SCG are updated, and the notification message including the updated configuration parameters of the source SCG; and if the updated configuration parameters of the source SCG are associated with the configuration parameters of the candidate SCG, the processing unit is configured to update the configuration information of the candidate SCG based on the updated configuration parameters of the source SCG; and a sending unit configured to send the updated configuration information of the candidate SCG to the source MN.

[0033] In a possible implementation method, the configuration information of the candidate secondary cell group SCG is used to indicate whether the configuration information of the candidate SCG is included in the conditional handover request confirmation message.

[0034] In a sixth aspect, the present application provides a secondary cell group configuration device, which includes a receiving unit configured to receive configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG from a source master base station MN.

[0035] In a possible implementation method, the device further includes an accessing unit, if the candidate SCG corresponding master-secondary cell handover condition is not configured, when accessing the candidate MN according to the configuration information of the candidate MCG, the accessing unit is configured to access the candidate SCG according to the configuration information of the candidate SCG.

[0036] In a possible implementation method, if the candidate SCG corresponding master-secondary cell handover condition is configured, after accessing the candidate MN according to the configuration information of the candidate MCG, when the candidate SCG corresponding master-secondary cell handover condition is met, the accessing unit is configured to access the candidate SCG according to the configuration information of the candidate SCG.

[0037] In a possible implementation method, the number of the candidate SCGs is one or more, and each candidate SCG corresponds to a master-secondary cell handover condition.

[0038] In a seventh aspect, the present application provides a chip including a processor and a communication interface, the processor being configured to perform the following operations: sending a conditional handover request message to a candidate master base station MN; receiving a conditional handover request confirmation message from the candidate MN, the conditional handover request confirmation message including configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG; and sending the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device.

[0039] In an eighth aspect, the present application provides a chip comprising a processor and a communication interface, the processor being configured to perform the following operations: receiving a conditional handover request message from a source master base station MN; and sending a conditional handover request acknowledgement message to the source MN, the conditional handover request acknowledgement message comprising configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG.

[0040] In a ninth aspect, the present application provides a chip comprising a processor and a communication interface, the processor being configured to perform the following operations: receiving configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG from a source master base station MN.

[0041] In a tenth aspect, the present application provides a module device comprising a communication module, a power supply module, a storage module, and a chip, wherein: the power supply module is configured to provide power for the module device; the storage module is configured to store data and instructions; the communication module is configured to perform internal communication of the module device or to perform communication between the module device and an external device; and the chip is configured to: send a conditional handover request message to a candidate master base station MN; receive a conditional handover request acknowledgement message from the candidate MN, the conditional handover request acknowledgement message comprising configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG; and send the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device.

[0042] In an eleventh aspect, the present application provides a module device comprising a transceiver assembly and a chip, the chip comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is configured to: receive a conditional handover request message from a source master base station MN; and send a conditional handover request acknowledgement message to the source MN, the conditional handover request acknowledgement message comprising configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG.

[0043] In a twelfth aspect, the present application provides a module device comprising a transceiver assembly and a chip, the chip comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is configured to: receive configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG from a source master base station MN.

[0044] In a thirteenth aspect, an embodiment of the present application discloses a base station comprising a memory and a processor, the memory being configured to store a computer program, the computer program comprising program instructions, and the processor being configured to invoke the program instructions to perform the method in the first aspect and any possible implementation manner thereof, or to perform the method in the second aspect and any possible implementation manner thereof.

[0045] In a fourteenth aspect, an embodiment of the present application provides a terminal device, comprising a memory and a processor, the memory is configured to store a computer program, the computer program comprises program instructions, and the processor is configured to invoke the program instructions to execute the method in the third aspect and any possible implementation manner thereof.

[0046] In a fifteenth aspect, the present application provides a computer readable storage medium, the computer readable storage medium stores computer readable instructions, when the computer readable instructions run on a communication device, the communication device executes the method in the first aspect and any possible implementation manner thereof, or executes the method in the second aspect and any possible implementation manner thereof, or executes the method in the third aspect and any possible implementation manner thereof.

[0047] In a sixteenth aspect, the present application provides a computer program or computer program product, comprising codes or instructions, when the codes or instructions run on a computer, the computer executes the method in the first aspect and any possible implementation manner thereof, or executes the method in the second aspect and any possible implementation manner thereof, or executes the method in the third aspect and any possible implementation manner thereof. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0049] Figure 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

[0050] Figure 2 is a flowchart of a conditional handover provided by an embodiment of the present application;

[0051] Figure 3 is a flowchart of a secondary cell group configuration method provided by an embodiment of the present application;

[0052] Figure 4 is a flowchart of another secondary cell group configuration method provided by an embodiment of the present application;

[0053] Figure 5 is a structural diagram of a secondary cell group configuration device provided by an embodiment of the present application;

[0054] Figure 6 is a structural diagram of a secondary cell group configuration device provided by an embodiment of the present application;

[0055] Figure 7 is a structural schematic diagram of a base station provided by an embodiment of the present application;

[0056] Figure 8 is a structural schematic diagram of a terminal device provided by an embodiment of the present application;

[0057] Figure 9 is a structural schematic diagram of a module device provided by an embodiment of the present application;

[0058] Figure 10 is a structural schematic diagram of a module device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0059] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings.

[0060] The terms "first" and "second" and the like in the description, claims, and drawings of the present application are used to distinguish different objects, rather than to describe a particular sequential order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a list of steps or units is not limited to the listed steps or units, but can optionally further include other steps or units not listed, or can optionally further include other steps or units inherent to such processes, methods, products, or devices.

[0061] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0062] In the present application, "at least one" means one or more, "multiple" means two or more, "at least two" means two or three and more, and "and / or" is used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that there are three cases of only A, only B, and A and B at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0063] In order to better understand the embodiments of the present application, first, the communication system related to the embodiments of the present application is introduced as follows:

[0064] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, 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 for microwave access (WiMAX) communication system, 5th generation (5G) system or new radio (NR), and future communication systems, etc.

[0065] Figure 1 is a schematic diagram of a communication system provided by the embodiments of the present application, and the solutions in the present application can be applied to the communication system. The communication system can include a base station and a terminal device, Figure 1 Taking a communication system including 2 base stations and 1 terminal device as an example.

[0066] I. Terminal device

[0067] The terminal device includes a device providing voice and / or data connectivity to a user, such as a mobile phone, a vehicle, a roadside unit, a tablet, a computer with wireless transceiver functionality, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in an industrial control, a terminal device in a vehicle, a wireless terminal in self driving, a wireless terminal in remote medical treatment, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a wearable terminal device, and the like. The embodiments of the present application do not limit application scenarios. The terminal device can also be referred to as a terminal, a user equipment (UE), an access terminal device, a vehicle terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a terminal device, a wireless communication device, a UE agent, or a UE apparatus, and the like. The terminal can also be fixed or mobile. In the embodiments of the present application, the device for implementing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system or a combination device, component, which can implement the function of the terminal device, and the device can be installed in the terminal device.

[0068] II. Base station

[0069] The base station is a node or device for accessing a terminal device to a wireless network. The base station mentioned in the present application includes, for example, but is not limited to, a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5th generation (5G) mobile communication system, a next generation NodeB in a 6th generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. The base station mentioned in the present application can also be a module or unit that completes the function of the base station, for example, a central unit (CU) or a distributed unit (DU). The CU completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP). The DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete the functions of part of the physical layer or the entire physical layer. For specific descriptions of the above protocol layers, refer to the relevant technical specifications of the 3rd generation partnership project (3GPP). The base station mentioned in the present application can be a macro base station, a micro base station, or an indoor station, and can also be a relay node or a donor node.

[0070] In the embodiments of the present application, the device for implementing the function of the base station can be the base station itself, or a device capable of supporting the base station to implement the function, such as a chip system or a combined device or component that can implement the function of the base station, which can be installed in the base station. The embodiments of the present application do not limit the specific technology and specific equipment form adopted by the base station.

[0071] In order to facilitate understanding of the technical solutions of the present application, the following will first explain and describe some terms involved in the present application.

[0072] 1. Dual Connectivity (DC)

[0073] The dual connectivity technology can provide the terminal device with higher data transmission rate and utilize macro / micro networking to improve spectrum efficiency and load balancing. For example, the terminal device can be connected to a macro base station and a micro base station at the same time, and the macro base station and the micro base station can be connected to each other through an X2 interface. The macro base station and the micro base station can be connected to each other through an X2 interface. Figure 1As shown, a terminal device supporting dual connectivity can simultaneously establish a communication connection with two base stations, including a master node (MN) and a secondary node (SN). In this communication system, the terminal device supporting dual connectivity is configured with at least two cell groups, one is a master cell group (MCG), and the other is a secondary cell group (SCG). Among them, the MCG refers to a cell group associated with the master base station, which includes a primary cell (PCell) and one or more secondary cells (SCell). The PCell in the MCG is a cell that establishes a radio resource control (RRC) connection with the terminal device, and the PCell in the MCG is configured with physical uplink control channel (PUCCH) resources. Other SCells in the MCG usually do not configure PUCCH resources. The SCG refers to a cell group associated with the secondary base station, which includes a primary secondary cell (PSCell) and one or more SCells. The PSCell in the SCG is the only serving cell in the SCG that is configured with PUCCH resources.

[0074] 2. Conditional handover (CHO)

[0075] The CHO mechanism is a mechanism for enhancing the robustness of handover or secondary node addition, which can improve the handover success rate of the terminal device. Specifically, the flowchart of the conditional handover of the terminal device can be referred to as Figure 2 As shown, it includes S201-S205. Among them:

[0076] S201, the source base station sends a conditional handover request to the candidate target base station.

[0077] S202, the candidate target base station allocates necessary radio resources for the terminal device, and then sends a conditional handover request confirmation message to the source base station.

[0078] S203, the source base station sends the terminal device the configuration information of the conditional handover, which includes the information of one or more candidate cells configured by the network device for the terminal device, and the handover condition (or handover execution condition) corresponding to each candidate cell.

[0079] S204, after receiving the configuration information of the conditional handover, the terminal device evaluates whether each candidate cell meets the handover condition according to the configuration information.

[0080] S205, the terminal device selects a candidate cell meeting the handover condition as a target cell and performs handover to the target cell.

[0081] In the conditional handover process shown in Figure 2 In the conditional handover process shown in

[0082] 3, conditional PSCell change (CPC)

[0083] The CPC mechanism can be understood as a conditional handover mechanism on the secondary base station side, also known as a conditional update mechanism. The CPC mechanism is that the MN or SN sends the configuration of the candidate PSCell and the handover condition of the candidate PSCell to the terminal device in advance, and when the terminal device measures that the candidate PSCell meets the handover condition, the terminal device can spontaneously perform the process of PSCell handover. Usually, PSCell handover is also called PSCell update.

[0084] In the R17 communication standard, the conditional handover on the primary base station side (i.e., the conditional handover of the primary cell) and the conditional PSCell change on the secondary base station side (i.e., the conditional PSCell update of the primary and secondary cells) cannot be configured at the same time. In other words, if the terminal device in dual connectivity is configured with a candidate primary cell group, a candidate secondary cell group cannot be configured. If dual connectivity needs to be configured after handover, the terminal device needs to be switched to the target primary cell, and then the target primary cell configures the secondary cell group. Such a configuration method of the secondary cell group increases signaling overhead, wastes transmission resources, and increases the time delay of configuring the secondary cell group SCG.

[0085] In order to configure the configuration information of the primary cell group and the configuration information of the secondary cell group in the terminal device at the same time, thereby reducing the signaling overhead and saving transmission resources, the present application provides a secondary cell group configuration method, device, chip and module equipment. The secondary cell group configuration method, device, chip and module equipment provided by the embodiments of the present application are described in detail below.

[0086] Please refer to Figure 3 as shown, Figure 3 is a flowchart of a secondary cell group configuration method provided by an embodiment of the present application. As Figure 3 shown, the secondary cell group configuration method includes the following S301-S303. Figure 3The method execution subject shown can be the source MN or a chip in the source MN. Alternatively, Figure 3 The method execution subject shown can be the candidate MN or a chip in the candidate MN. Figure 3 The method execution subject shown can be the source MN or a chip in the source MN. Alternatively,

[0087] S301, the source MN sends a conditional handover request message to the candidate MN.

[0088] Correspondingly, the candidate MN receives the conditional handover request message from the source MN. Specifically, the source MN selects at least one candidate PCell according to the measurement report of the terminal device, and sends a conditional handover request message to the candidate MN corresponding to each PCell in the at least one candidate PCell. In other words, the source MN can send a conditional handover request message to one or more candidate MNs.

[0089] In one possible implementation, the conditional handover request message includes the capability information of the terminal device, and the capability information of the terminal device is used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG. For example, a field A is included in the conditional handover request message, the value of the field A is used to indicate whether the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG, when the value of the field A is 0, it indicates that the terminal device does not have the capability of simultaneously configuring the candidate MCG and the candidate SCG; when the value of the field A is 1, it indicates that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0090] In another possible implementation, in addition to the capability information of the terminal device, the conditional handover request message can also include the configuration parameters of the source MCG corresponding to the current terminal device, the configuration parameters of the source SCG, the configuration information of the data radio bearer of the terminal device, etc.

[0091] S302, the source MN receives a conditional handover request confirmation message from the candidate MN, and the conditional handover request confirmation message includes the configuration information of the candidate MCG and the configuration information of the candidate SCG.

[0092] Correspondingly, after the candidate MN receives the conditional handover request message from the source MN, if the candidate MN accepts the handover request, the candidate MN and the candidate SN negotiate to configure reasonable radio parameters for the terminal device, i.e., to configure (or understand to determine) the configuration information of the candidate MCG and the configuration information of the candidate SCG. Further, the candidate MN sends a conditional handover request confirmation message to the source MN, wherein the conditional handover request message includes the configuration information of the candidate MCG and the configuration information of the candidate SCG. Specifically, the candidate MN can send the configuration information of the candidate MCG and the configuration information of the candidate SCG to the source MN through a transmission container (also referred to as a Transparent Container). It should be noted that each candidate MCG corresponds to a handover condition (i.e., a handover condition of a PCell in the candidate MCG), which is set by the source MN, and each candidate SCG can also correspond to a handover condition (i.e., an update condition of a PSCell in the candidate SCG), or the candidate SCG can have no corresponding handover condition.

[0093] In other words, if the candidate SCG has a corresponding PSCell update condition, the PSCell update condition can be set by the candidate MN, and after the candidate MN receives the candidate SCG configuration information configured by the candidate SN for the terminal device, the candidate MN places the candidate MCG configuration information configured by the candidate MN for the terminal device, the candidate SCG configuration information and the corresponding PSCell update conditions of each candidate SCG in a transmission container (also referred to as a Transparent Container), and sends them to the source MN through the conditional handover request confirmation message. If the candidate SCG has no corresponding PSCell update condition, after the candidate MN receives the candidate SCG configuration information configured by the candidate SN for the terminal device, the candidate MN places the candidate MCG configuration information configured by the candidate MN for the terminal device and the candidate SCG configuration information in a transmission container (also referred to as a Transparent Container), and sends them to the source MN through the conditional handover request confirmation message.

[0094] Exemplarily, in the case that the capability information of the terminal device in the conditional handover request message includes the capability of simultaneously configuring the candidate MCG and the candidate SCG, the candidate MN includes the configuration information of the candidate MCG and the configuration information of the candidate SCG in the conditional handover request confirmation message sent to the source MN. In the case that the capability information of the terminal device in the conditional handover request message does not include the capability of simultaneously configuring the candidate MCG and the candidate SCG, the candidate MN includes the configuration information of the candidate MCG in the conditional handover request confirmation message sent to the source MN.

[0095] In a possible implementation, the conditional handover request acknowledgement message is further used to indicate whether the conditional handover request acknowledgement message contains the configuration information of the candidate SCG. Alternatively, it can be understood that the conditional handover request acknowledgement message includes an explicit indication field, which is used to indicate whether the transparent container contains the configuration information of the candidate SCG. For example, indication field 1 is used to indicate whether the transparent container contains the configuration information of the candidate SCG. When the indication field 1 is 0, it indicates that the transparent container does not contain the configuration information of the candidate SCG. When the indication field 1 is 1, it indicates that the transparent container contains the configuration information of the candidate SCG.

[0096] Alternatively, in another possible implementation, the candidate MN can also send an Xn interface message to the source MN, which is used to indicate whether the transparent container contains the configuration information of the candidate SCG.

[0097] In a possible implementation, the conditional handover request acknowledgement message further includes first indication information, which is used to indicate a configuration mode corresponding to the configuration information of the target side or a configuration mode corresponding to the configuration information of the candidate SCG. The target side includes the candidate MCG and / or the candidate SCG. The configuration mode corresponding to the configuration information of the target side is a delta signaling configuration mode or a full configuration mode. The configuration mode corresponding to the configuration information of the candidate SCG is a delta signaling configuration mode or a full configuration mode. The delta signaling configuration mode can be simply understood as a configuration mode in which the new configuration parameters that are different from the configuration parameters of the source side are configured in the form of delta signaling with the configuration parameters of the source side as a reference.

[0098] In other words, when the configuration mode corresponding to the configuration information of the candidate SCG is a delta signaling configuration mode, the configuration information of the candidate SCG contains the necessary configuration parameters of the candidate SCG. In this case, the terminal device needs to obtain the entire configuration parameters of the candidate SCG through the configuration information of the candidate SCG and the reference (i.e., the configuration parameters of the source SCG). When the configuration mode corresponding to the configuration information of the candidate SCG is a full configuration mode, the configuration information of the candidate SCG contains the entire configuration parameters of the candidate SCG.

[0099] Exemplarily, the configuration parameters of the source SCG are a11, b12, c13 and d14, and the configuration parameters of the candidate SCG are a11, b12, c33 and d34. In this case, if the configuration information of the candidate SCG corresponds to the incremental signaling configuration mode, the configuration information of the candidate SCG is used to indicate that c13 in the configuration parameters of the source SCG is replaced by c33, and d14 is replaced by d34. If the configuration information of the candidate SCG corresponds to the full configuration mode, the configuration information of the candidate SCG is used to indicate that the configuration parameters of the candidate SCG are a11, b12, c33 and d34. It should be noted that the incremental signaling configuration mode also complies with some rules, for example, some parameters in the configuration parameters can be configured by incremental signaling, and some parameters cannot be configured by incremental signaling.

[0100] S303, the source MN sends the configuration information of the candidate MCG and the configuration information of the candidate SCG to the terminal device.

[0101] After the source MN receives the configuration information of the candidate MCG and the configuration information of the candidate SCG from the candidate MN, the source MN forwards the configuration information of the candidate MCG and the switching conditions of each candidate MCG (i.e. the switching conditions of the PCell), and the configuration information of the candidate SCG and the switching conditions of each candidate SCG to the terminal device. After the terminal device receives the configuration information of the candidate MCG and the configuration information of the candidate SCG, the terminal device evaluates whether the candidate primary cell (the primary cell in the candidate MCG) satisfies the switching condition according to the switching conditions of each candidate MCG. If the switching condition is satisfied, the terminal device accesses the target MCG (i.e. accesses the target primary cell) according to the configuration information of the candidate MCG, and then accesses the target SCG according to the configuration information of the candidate SCG associated with the configuration information of the candidate MCG.

[0102] It should be noted that the source MN can send the configuration information of multiple candidate MCGs and the configuration information of the candidate SCG associated with each MCG configuration to the terminal device, wherein the switching conditions corresponding to each candidate MCG can be the same or different. The terminal device finds that a certain candidate MCG satisfies the switching condition, that is, it can be understood that the primary cell of the candidate MCG satisfies the switching condition. The terminal device accesses the candidate MCG and then accesses the candidate SCG associated with the candidate MCG (if the candidate SCG does not have the update condition of the corresponding PSCell), so that the establishment of dual connectivity can be completed in the switching process.

[0103] In a possible implementation, when the terminal device accesses the candidate MN according to the configuration information of the candidate MCG without the configured primary-secondary cell switching condition (also referred to as an update execution condition) corresponding to the candidate SCG, the terminal device accesses the candidate SCG according to the configuration information of the candidate SCG at the same time (or in parallel). It can be understood that the candidate MCG is associated with (or corresponds to) the candidate SCG, or the candidate MCG and the candidate SCG are associated with (or correspond to) the same candidate MN.

[0104] In a possible implementation, when the terminal device accesses the candidate MN according to the configuration information of the candidate MCG, the terminal device accesses the candidate SCG according to the configuration information of the candidate SCG when the primary-secondary cell switching condition (also referred to as an update execution condition) corresponding to the candidate SCG is met, if the terminal device is configured with the primary-secondary cell switching condition (also referred to as an update execution condition) corresponding to the candidate SCG. In other words, if the wireless connection parameters of the candidate SCG and the PSCell switching condition of the candidate SCG are included in the transmission container (also referred to as a Transparent Container), after the terminal device accesses the candidate MN according to the configuration information of the candidate MCG, the terminal device needs to determine whether the PSCell in the candidate SCG meets the primary-secondary cell switching condition corresponding to the candidate SCG, and access the candidate SCG when the primary-secondary cell switching condition (update execution condition) corresponding to the candidate SCG is met.

[0105] In a possible implementation, the number of candidate SCGs can be one or more, and each candidate SCG corresponds to a primary-secondary cell switching condition. In other words, if the condition switching request confirmation message contains configuration information of multiple candidate SCGs, each candidate SCG has a corresponding primary-secondary cell switching condition. After the terminal device accesses the candidate MN according to the configuration information of the candidate MCG, the terminal device evaluates whether the PSCell in the candidate SCG meets the corresponding PSCell switching condition according to the primary-secondary cell switching condition (update execution condition) corresponding to each candidate SCG, and accesses the PSCell that meets the switching condition when there is a PSCell that meets the switching condition.

[0106] Based on Figure 3 The provided secondary cell group configuration method can simultaneously configure configuration information of a candidate MCG and configuration information of a candidate SCG for a terminal device in dual connectivity, which is beneficial to reduce signaling overhead and save transmission resources.

[0107] In Figure 3In the method shown, in the case where the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, if the configuration parameters of the source SCG are updated, it can cause the case that the configuration parameters obtained by the terminal device according to the updated configuration parameters of the source SCG and the configuration information of the candidate SCG do not correspond to the SCG configuration parameters stored by the secondary base station corresponding to the candidate SCG, and further can cause the terminal device to fail to successfully access the candidate SCG.

[0108] For example, at a first time, the candidate MN receives the configuration parameters of the source SCG sent by the source MN, which are a11, b12, c13 and d14. Further, the candidate MN sends the configuration information of the candidate SCG to the source MN, which is used to indicate that c13 in the configuration parameters of the source SCG is replaced by c33 and d14 is replaced by d34, that is, the configuration of the candidate SCG can only be c33 and d34. At a second time after the first time, the configuration parameters of the source SCG are updated, and the updated configuration parameters of the source SCG are a11, b121, c13 and d14. In this case, the complete configuration parameters obtained by the terminal device according to the configuration information of the candidate SCG and the updated configuration parameters of the source SCG are a11, b121, c33 and d34, which are different from the configuration parameters of the candidate SCG stored by the candidate secondary base station (a11, b12, c33 and d34). If the terminal device accesses the SCG, there can be a parameter mismatch, and further can cause the connection to be abnormal.

[0109] To avoid this situation and improve the success rate of the terminal device accessing the candidate SCG, please refer to Figure 4 shown, Figure 4 is a flowchart of another secondary cell group configuration method provided by the embodiments of the present application. As Figure 4 shown, the secondary cell group configuration method includes the following S401-S407.

[0110] S401, the source MN sends a conditional handover request message to the candidate MN.

[0111] S402, the source MN receives a conditional handover request confirmation message from the candidate MN, and the conditional handover request confirmation message includes configuration information of a candidate MCG and configuration information of a candidate SCG.

[0112] S403, the source MN sends the configuration information of the candidate MCG and the configuration information of the candidate SCG to the terminal device.

[0113] The specific implementation of S401-S403 can be referred to the description of the specific implementation of S301-S303, and the repeated parts will not be described here.

[0114] S404, in a case that the configuration mode corresponding to the configuration information at the target side is the incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is the incremental configuration mode, the source MN sends a notification message to the candidate MN, the notification message being used for notifying that the configuration parameter of the source SCG is updated, and the notification message comprising the updated configuration parameter of the source SCG.

[0115] In other words, since the configuration mode corresponding to the configuration information at the target side is the incremental signaling configuration mode, or the configuration information of the candidate SCG is configured in the incremental signaling configuration mode, the terminal device needs to take the configuration parameter at the source side as a reference benchmark, and combine the configuration information at the target side or the configuration information of the candidate SCG, to obtain the complete configuration parameter of the candidate SCG. Since the configuration parameter at the source side (for example, the configuration parameter of the source SCG) is variable, when the configuration parameter of the source SCG is updated, the source MN needs to send a notification message to the candidate MN, so that the candidate MN knows that the configuration parameter of the source SCG is updated, and then the candidate MN sets the configuration information of the new candidate SCG according to the updated configuration parameter of the source SCG.

[0116] In another possible implementation, if the configuration mode corresponding to the configuration information at the target side is the full configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is the full configuration mode, in this case, only the configuration information at the target side or the configuration information of the candidate SCG can determine the complete (full) parameter of the candidate SCG, and in this case, when the configuration parameter of the source SCG is updated, the source MN also does not need to send a notification message to the candidate MN.

[0117] S405 (optional), if the updated configuration parameter of the source SCG is associated with the configuration parameter of the candidate SCG, the candidate MN updates the configuration information of the candidate SCG based on the updated configuration parameter of the source SCG.

[0118] In other words, after the candidate MN receives the notification message, it is determined whether the updated configuration parameter of the source SCG is associated with the configuration parameter of the candidate SCG. If the updated configuration parameter of the source SCG is associated with the configuration parameter of the candidate SCG, the candidate MN updates the configuration information of the candidate SCG based on the updated configuration parameter of the source SCG and the candidate SN. If the updated configuration parameter of the source SCG is not associated with the configuration parameter of the candidate SCG, for example, the configuration parameter of the candidate SCG adopts the full configuration mode, the candidate MN can ignore the updated configuration parameter of the source SCG, that is, the configuration information of the candidate SCG will not be updated.

[0119] The case that the configuration parameters of the updated source SCG are associated with the configuration parameters of the candidate SCG can be understood as the case that the configuration parameters of the candidate SCG cannot be accurately determined according to the configuration information of the candidate SCG and the configuration parameters of the updated source SCG. The case that the configuration parameters of the updated source SCG are not associated with the configuration parameters of the candidate SCG can be understood as the case that the configuration parameters of the candidate SCG can be accurately determined according to the configuration information of the candidate SCG.

[0120] Exemplarily, at the first time, the candidate MN receives the conditional handover request message sent by the source MN, and the conditional handover request message indicates that the configuration parameters of the source MCG are a01, b02, c03 and d04, and the configuration parameters of the source SCG are a11, b12, c13 and d14. Further, the candidate MN sends the conditional handover request confirmation message to the source MN, and the configuration information of the candidate MCG in the conditional handover request confirmation message is a01, b02, c23 and d04, and the configuration information of the candidate SCG is used to indicate that c13 in the configuration parameters of the source SCG is replaced by c33, and d14 is replaced by d34, that is, the configuration information of the candidate SCG is c33 and d34. At the second time after the first time, the source MN perceives that the configuration parameters of the source SCG are updated, and then the source MN sends the notification message to the candidate MN, and the notification message includes the configuration parameters a11, b121, c13 and d14 of the updated source SCG. In this case, it can be inferred that the determined configuration parameters are a11, b121, c33 and d34 according to the configuration information of the candidate SCG and the configuration parameters of the updated source SCG, which are different from the initial configuration parameters (a11, b12, c33 and d34) of the candidate SCG, and it can be considered that the configuration parameters of the updated source SCG are associated with the configuration parameters of the candidate SCG. Further, the candidate MN sends the updated configuration information of the candidate SCG and the configuration information of the candidate MCG to the source MN, wherein the updated configuration information of the candidate SCG is used to indicate that b121 in the configuration parameters of the source SCG is replaced by b12, c13 is replaced by c33, and d14 is replaced by d34, that is, the configuration information of the candidate SCG is b12, c33 and d34, and the configuration information of the candidate MCG is a01, b02, c23 and d04.

[0121] S406 (optional), the candidate MN sends the updated configuration information of the candidate SCG and the configuration information of the candidate MCG to the source MN.

[0122] In other words, if the configuration parameter of the updated source SCG on the source MN side is associated with the configuration parameter of the candidate SCG, the source MN can further receive the configuration information of the updated candidate SCG and the configuration information of the candidate MCG from the candidate MN, the configuration information of the updated candidate SCG being set based on the configuration parameter of the updated source SCG.

[0123] S407 (optional), the source MN sends the configuration information of the updated candidate SCG and the configuration information of the candidate MCG to the terminal device.

[0124] The source MN sends the configuration information of the updated candidate SCG and the configuration information of the candidate MCG to the terminal device, and further, the terminal device updates the configuration information of the candidate SCG and the configuration information of the candidate MCG stored by itself based on the configuration information of the updated candidate SCG and the configuration information of the candidate MCG.

[0125] It can be seen that, by Figure 4 The provided secondary cell group configuration method, in the case of configuring the configuration information of the candidate SCG through the incremental signaling configuration mode, the source MN notifies the candidate MN of the updated source SCG parameter, so that the candidate MN can set the configuration information of the updated candidate SCG according to the updated source SCG parameter, avoiding the case that the configuration parameter of the candidate SCG determined by the terminal device according to the configuration information of the candidate SCG does not correspond to the SCG configuration parameter saved by the candidate MN, and improving the success rate of the terminal device accessing the candidate SCG.

[0126] Please refer to Figure 5 , Figure 5 is a structural schematic diagram of a secondary cell group configuration device provided by an embodiment of the present application, which can be a source base station or a device (such as a chip) with a source base station function. Specifically, as shown in Figure 5 , the secondary cell group configuration device 500 can include:

[0127] The sending unit 501 is configured to send a conditional handover request message to the candidate master base station MN.

[0128] The receiving unit 502 is configured to receive a conditional handover request confirmation message from the candidate MN, the conditional handover request confirmation message including the configuration information of the candidate master cell group MCG and the configuration information of the candidate secondary cell group SCG.

[0129] The sending unit 501 is further configured to send the configuration information of the candidate MCG and the configuration information of the candidate SCG to the terminal device.

[0130] In a possible implementation, the capability information of the terminal device is included in the conditional handover request message, and the capability information of the terminal device is used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0131] In a possible implementation, the conditional handover request confirmation message further includes first indication information, the first indication information is used to indicate a configuration mode corresponding to the configuration information of the target side or a configuration mode corresponding to the configuration information of the candidate SCG; the target side includes the candidate MCG and the candidate SCG; the configuration mode corresponding to the configuration information of the target side is the incremental signaling configuration mode or the full configuration mode; and the configuration mode corresponding to the configuration information of the candidate SCG is the incremental signaling configuration mode or the full configuration mode.

[0132] In a possible implementation, the configuration mode corresponding to the configuration information of the target side is the incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is the incremental signaling configuration mode, and the sending unit 501 is configured to send a notification message to the candidate MN, the notification message being used to notify that the configuration parameters of the source SCG are updated, and the notification message including the updated configuration parameters of the source SCG.

[0133] In a possible implementation, the receiving unit 502 is configured to receive the updated configuration information of the candidate secondary cell group SCG and the configuration information of the candidate master cell group MCG from the candidate MN, and the updated configuration information of the candidate SCG is set on the basis of the updated configuration parameters of the source SCG.

[0134] In a possible implementation, the configuration information of the candidate SCG is used to indicate whether the conditional handover request confirmation message contains the configuration information of the candidate SCG. By explicitly indicating in the interface signaling whether the configuration information of the candidate SCG is contained in the transmission container, the source MN is aware of whether the configuration information of the candidate SCG needs to be timely notified after the configuration parameters of the source SCG are updated, and meanwhile, the source MN can avoid analyzing the content in the transmission container, so that the processing complexity of the source MN can be reduced.

[0135] In a possible implementation, the secondary cell group configuration apparatus can be a candidate base station or an apparatus (for example, a chip) having a candidate base station function. The secondary cell group configuration apparatus 500 includes:

[0136] The receiving unit 502 is configured to receive a conditional handover request message from a source master base station MN.

[0137] The sending unit 501 is configured to send a conditional handover request confirmation message to the source MN, and the conditional handover request confirmation message includes configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG.

[0138] In a possible implementation, the capability information of the terminal device included in the conditional handover request message indicates that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0139] In a possible implementation, the conditional handover request acknowledgment message further includes first indication information, the first indication information being used to indicate a configuration manner corresponding to the configuration information of the target side or a configuration manner corresponding to the configuration information of the candidate SCG; the target side includes the candidate MCG and the candidate SCG; the configuration manner corresponding to the configuration information of the target side is an incremental signaling configuration manner or a full configuration manner; and the configuration manner corresponding to the configuration information of the candidate SCG is an incremental signaling configuration manner or a full configuration manner.

[0140] In a possible implementation, the secondary cell group configuration apparatus further includes a processing unit 503, in this case, the configuration manner corresponding to the configuration information of the target side is an incremental signaling configuration manner, or the configuration manner corresponding to the configuration information of the candidate SCG is an incremental signaling configuration manner, a receiving unit 502 configured to receive a notification message from the source MN, the notification message being used to notify that the configuration parameters of the source SCG are updated, and the notification message including the updated configuration parameters of the source SCG; the processing unit 503 is configured to update the configuration information of the candidate SCG based on the updated configuration parameters of the source SCG, if the updated configuration parameters of the source SCG are associated with the configuration parameters of the candidate SCG; and a sending unit 501 configured to send the updated configuration information of the candidate SCG.

[0141] In a possible implementation, the configuration information of the candidate secondary cell group SCG is used to indicate whether the conditional handover request acknowledgment message contains the configuration information of the candidate SCG.

[0142] See Figure 6 , Figure 6 is a structural schematic diagram of a secondary cell group configuration apparatus provided by an embodiment of the present application, and the secondary cell group configuration apparatus can be a terminal device or a device (for example, a chip) having a terminal device function. Specifically, as shown in Figure 6 , the secondary cell group configuration apparatus 600 can include:

[0143] a receiving unit 601 configured to receive configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG from a source master base station MN.

[0144] In a possible implementation, the apparatus 600 further includes an accessing unit 602, if a master secondary cell switching condition corresponding to a candidate SCG is not configured, when accessing a candidate MN according to configuration information of the candidate MCG, the accessing unit 602 is configured to access the candidate SCG according to configuration information of the candidate SCG.

[0145] In a possible implementation, if a master secondary cell switching condition corresponding to a candidate SCG is configured, after accessing the candidate MN according to configuration information of the candidate MCG, when the master secondary cell switching condition corresponding to the candidate SCG is met, the accessing unit 602 is configured to access the candidate SCG according to configuration information of the candidate SCG.

[0146] In a possible implementation, the number of the candidate SCGs is one or more, and each candidate SCG corresponds to a master secondary cell switching condition.

[0147] Please refer to Figure 7 , Figure 7 is a structural schematic diagram of a base station provided by an embodiment of the application. The base station 700 can include a memory 701, a processor 702, and optionally a communication interface 703. The memory 701, the processor 702 and the communication interface 703 are connected through one or more communication buses. The communication interface 703 is controlled by the processor 702 to receive or send information. The memory 701 can include read-only memory and random access memory, and provide instructions and data for the processor 702. Part of the memory 701 can also include non-volatile random access memory. The communication interface 703 is used to receive or send data. The processor 702 can be a central processing unit (CPU), and the processor 702 can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor, and optionally the processor 702 can also be any conventional processor or the like. Wherein:

[0148] The memory 701 is configured to store program instructions.

[0149] The processor 702 is configured to invoke the program instructions stored in the memory 701.

[0150] The processor 702 invokes program instructions stored in the memory 701 to cause the base station 700 to perform the following operations: sending a conditional handover request message to a candidate master base station MN; receiving a conditional handover request acknowledgement message from the candidate MN, the conditional handover request acknowledgement message including configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG; and sending the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device.

[0151] In a possible implementation, the conditional handover request message includes capability information of the terminal device, the capability information of the terminal device being used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0152] In a possible implementation, the conditional handover request acknowledgement message further includes first indication information, the first indication information being used to indicate a configuration mode corresponding to the configuration information of the target side or a configuration mode corresponding to the configuration information of the candidate SCG; the target side includes the candidate MCG and the candidate SCG; the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode or a full configuration mode; and the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode or a full configuration mode.

[0153] In a possible implementation, the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, and the processor 702 is further configured to send a notification message to the candidate MN, the notification message being used to notify that the configuration parameters of the source SCG are updated, and the notification message including the updated configuration parameters of the source SCG.

[0154] In a possible implementation, the processor 702 is further configured to receive, from the candidate MN, updated configuration information of the candidate secondary cell group SCG and updated configuration information of the candidate master cell group MCG, the updated configuration information of the candidate SCG being set based on the updated configuration parameters of the source SCG.

[0155] In a possible implementation, the configuration information of the candidate SCG is used to indicate whether the conditional handover request acknowledgement message contains the configuration information of the candidate SCG.

[0156] In an embodiment, the base station 700 is further configured to perform the following operations: receiving a conditional handover request message from a source master base station MN; and sending a conditional handover request acknowledgement message to the source MN, the conditional handover request acknowledgement message including configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG.

[0157] In a possible implementation, the capability information of the terminal device included in the conditional handover request message indicates that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0158] In a possible implementation, the conditional handover request acknowledgement message further includes first indication information, where the first indication information is used to indicate a configuration mode corresponding to configuration information of a target side or a configuration mode corresponding to configuration information of a candidate SCG; the target side includes the candidate MCG and the candidate SCG; the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode or a full configuration mode; and the configuration mode corresponding to the configuration information of the candidate SCG is the incremental signaling configuration mode or the full configuration mode.

[0159] In a possible implementation, the configuration mode corresponding to the configuration information of the target side is the incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is the incremental signaling configuration mode, the processor 702 is further configured to receive a notification message from the source MN, where the notification message is used to notify that configuration parameters of the source SCG are updated, and the notification message includes the updated configuration parameters of the source SCG; and if the updated configuration parameters of the source SCG are associated with the configuration parameters of the candidate SCG, the processor 702 is further configured to update the configuration information of the candidate SCG based on the updated configuration parameters of the source SCG, and the processor 702 is further configured to send the updated configuration information of the candidate SCG.

[0160] In a possible implementation, the configuration information of the candidate secondary cell group SCG is used to indicate whether the conditional handover request acknowledgement message contains the configuration information of the candidate SCG.

[0161] See Figure 8 , Figure 8Fig. 8 is a structural schematic diagram of a terminal device provided by an embodiment of the present application. The terminal device 800 can include a memory 801, a processor 802. Optionally, it also includes a communication interface 803. The memory 801, the processor 802 and the communication interface 803 are connected through one or more communication buses. The communication interface 803 is controlled by the processor 802 to receive or send information. The memory 801 can include a read-only memory and a random access memory, and provide instructions and data for the processor 802. A part of the memory 801 can also include a non-volatile random access memory. The communication interface 803 is used to receive or send data. The processor 802 can be a central processing unit (CPU), and the processor 802 can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor, and optionally, the processor 802 can also be any conventional processor.

[0162] The memory 801 is used to store program instructions.

[0163] The processor 802 is used to call the program instructions stored in the memory 801.

[0164] The processor 802 calls the program instructions stored in the memory 801, so that the terminal device 800 performs the following operations: receiving configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG) from a source master base station (MN).

[0165] In one possible implementation, the apparatus further includes an access unit. If a primary-secondary cell switching condition corresponding to the candidate SCG is not configured, when accessing the candidate MN according to the configuration information of the candidate MCG, the processor 802 is further used to access the candidate SCG according to the configuration information of the candidate SCG.

[0166] In one possible implementation, if the primary-secondary cell switching condition corresponding to the candidate SCG is configured, after accessing the candidate MN according to the configuration information of the candidate MCG, when the primary-secondary cell switching condition corresponding to the candidate SCG is met, the processor 802 is further used to access the candidate SCG according to the configuration information of the candidate SCG.

[0167] In a possible implementation, the number of candidate SCGs is one or more, and each candidate SCG corresponds to a master secondary cell switching condition.

[0168] It should be noted that Figures 5-8 The contents not mentioned in the corresponding embodiments and the specific implementation of each step can be referred to Figure 3 Or Figure 4 The embodiments shown in the foregoing and the foregoing will not be repeated here.

[0169] The chip provided by the embodiment of the present application can execute the related steps of the source master base station (or candidate master base station) in the foregoing method embodiments. The chip comprises a processor and a communication interface, and the processor is configured to perform the following operations: sending a conditional handover request message to a candidate master base station MN; receiving a conditional handover request confirmation message from the candidate MN, wherein the conditional handover request confirmation message comprises configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG; and sending the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device.

[0170] In a possible implementation, the conditional handover request message comprises capability information of the terminal device, and the capability information of the terminal device is used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0171] In a possible implementation, the conditional handover request confirmation message further comprises first indication information, and the first indication information is used to indicate a configuration mode corresponding to the configuration information of the target side or a configuration mode corresponding to the configuration information of the candidate SCG; wherein the target side comprises the candidate MCG and the candidate SCG; the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode or a full configuration mode; and the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode or a full configuration mode.

[0172] In a possible implementation, the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, and the processor is further configured to send a notification message to the candidate MN, wherein the notification message is used to notify that the configuration parameters of the source SCG are updated, and the notification message comprises the updated configuration parameters of the source SCG.

[0173] In a possible implementation, the processor is further configured to receive the updated configuration information of the candidate secondary cell group SCG and the configuration information of the candidate master cell group MCG from the candidate MN, and the updated configuration information of the candidate SCG is set based on the updated configuration parameters of the source SCG.

[0174] In a possible implementation, the configuration information of the candidate SCG is used to indicate whether the configuration information of the candidate SCG is included in the conditional handover request acknowledgement message.

[0175] In an embodiment, the processor is configured to perform the following operations: receiving a conditional handover request message from a source master base station MN; and sending, to the source MN, a conditional handover request acknowledgement message including configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG.

[0176] In a possible implementation, the terminal device capability information included in the conditional handover request message is used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0177] In a possible implementation, the conditional handover request acknowledgement message further includes first indication information used to indicate a configuration mode corresponding to the configuration information of the target side or a configuration mode corresponding to the configuration information of the candidate SCG; the target side includes the candidate MCG and the candidate SCG; the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode or a full configuration mode; and the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode or a full configuration mode.

[0178] In a possible implementation, the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, and the processor is further configured to: receive a notification message from the source MN, the notification message being used to notify that a configuration parameter of the source SCG is updated, and the notification message including the updated configuration parameter of the source SCG; and update the configuration information of the candidate SCG based on the updated configuration parameter of the source SCG, if the updated configuration parameter of the source SCG is associated with the configuration parameter of the candidate SCG; and send the updated configuration information of the candidate SCG.

[0179] In a possible implementation, the configuration information of the candidate secondary cell group SCG is used to indicate whether the configuration information of the candidate SCG is included in the conditional handover request acknowledgement message.

[0180] The application also provides another chip, which can perform the related steps of the terminal device in the foregoing method embodiments. The chip includes a processor and a communication interface, and the processor is configured to perform the following operations: receiving configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG from a source master base station MN.

[0181] In one possible implementation, the device further includes an access unit. If the primary and secondary cell handover conditions corresponding to the candidate SCG are not configured, then when accessing the candidate MN according to the configuration information of the candidate MCG, the processor is used to access the candidate SCG according to the configuration information of the candidate SCG.

[0182] In one possible implementation, if there are primary and secondary cell handover conditions for a candidate SCG, after accessing the candidate MN according to the configuration information of the candidate MCG, when the primary and secondary cell handover conditions for the candidate SCG are met, the processor is used to access the candidate SCG according to the configuration information of the candidate SCG.

[0183] In one possible implementation, there are one or more candidate SCGs, and each candidate SCG corresponds to a primary / secondary cell handover condition.

[0184] like Figure 9 As shown, Figure 9 This is a schematic diagram of a module device provided in an embodiment of this application. The module device 900 can execute the relevant steps of the source primary base station or candidate primary base station in the aforementioned method embodiments. The module device 900 includes: a communication module 901, a power supply module 902, a storage module 903, and a chip 904. The power supply module 902 provides power to the module device; the storage module 903 stores data and instructions; the communication module 901 performs internal communication within the module device or allows communication between the module device and external devices; the chip 904 is used to: send a conditional handover request message to the candidate primary base station MN; receive a conditional handover request confirmation message from the candidate MN, the conditional handover request confirmation message including configuration information of the candidate primary cell group (MCG) and the candidate secondary cell group (SCG); and send the configuration information of the candidate MCG and the candidate SCG to the terminal device.

[0185] In one possible implementation, the condition switching request message includes capability information of the terminal device, which indicates that the terminal device has the ability to configure both candidate MCG and candidate SCG simultaneously.

[0186] In one possible implementation, the condition switching request confirmation message further includes first indication information, which is used to indicate the configuration method corresponding to the configuration information of the target side or the configuration method corresponding to the configuration information of the candidate SCG; wherein, the target side includes candidate MCG and candidate SCG; the configuration method corresponding to the configuration information of the target side is incremental signaling configuration method or full configuration method; the configuration method corresponding to the configuration information of the candidate SCG is incremental signaling configuration method or full configuration method.

[0187] In a possible implementation, the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, and the chip 904 is further configured to send a notification message to the candidate MN, where the notification message is used to notify that the configuration parameters of the source SCG are updated, and the notification message includes the updated configuration parameters of the source SCG.

[0188] In a possible implementation, the chip 904 is further configured to receive, from the candidate MN, updated configuration information of the candidate secondary cell group SCG and updated configuration information of the candidate master cell group MCG, where the updated configuration information of the candidate SCG is set on the basis of the updated configuration parameters of the source SCG.

[0189] In a possible implementation, the configuration information of the candidate SCG is used to indicate whether the configuration information of the candidate SCG is included in the conditional handover request acknowledgment message.

[0190] In one embodiment, the chip 904 is configured to: receive a conditional handover request message from a source master base station MN; and send, to the source MN, a conditional handover request acknowledgment message, where the conditional handover request acknowledgment message includes configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG.

[0191] In a possible implementation, the terminal device capability information included in the conditional handover request message is used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

[0192] In a possible implementation, the conditional handover request acknowledgment message further includes first indication information, where the first indication information is used to indicate a configuration mode corresponding to configuration information of a target side or a configuration mode corresponding to configuration information of a candidate SCG; the target side includes the candidate MCG and the candidate SCG; the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode or a full configuration mode; and the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode or a full configuration mode.

[0193] In a possible implementation, the configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, and the chip 904 is further configured to receive a notification message from the source MN, where the notification message is used to notify that the configuration parameters of the source SCG are updated, and the notification message includes the updated configuration parameters of the source SCG; if the updated configuration parameters of the source SCG are associated with the configuration parameters of the candidate SCG, the configuration information of the candidate SCG is updated on the basis of the updated configuration parameters of the source SCG; and the updated configuration information of the candidate SCG is sent.

[0194] In a possible implementation method, the configuration information of the candidate secondary cell group SCG is used to indicate whether the conditional handover request acknowledgement message contains the configuration information of the candidate SCG.

[0195] As shown in Figure 10 Figure 10 is a structural schematic diagram of a module device provided by an embodiment of the present application. The module device 1000 can execute the related steps of the terminal device in the foregoing method embodiments, and the module device 1000 comprises a communication module 1001, a power module 1002, a storage module 1003, and a chip 1004. The power module 1002 is configured to provide power for the module device; the storage module 1003 is configured to store data and instructions; the communication module 1001 is configured to perform internal communication of the module device, or to perform communication between the module device and an external device; and the chip 1004 is configured to receive configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG from a source master base station MN.

[0196] In a possible implementation manner, the apparatus further comprises an access unit, and if a master-secondary cell handover condition corresponding to the candidate SCG is not configured, the chip 1004 is configured to simultaneously access the candidate SCG when accessing the candidate MN according to the configuration information of the candidate MCG.

[0197] In a possible implementation manner, if a master-secondary cell handover condition corresponding to the candidate SCG is configured, the chip 1004 is configured to access the candidate SCG according to the configuration information of the candidate SCG when the master-secondary cell handover condition corresponding to the candidate SCG is met after accessing the candidate MN according to the configuration information of the candidate MCG.

[0198] In a possible implementation manner, the number of the candidate SCGs is one or more, and each candidate SCG corresponds to a master-secondary cell handover condition.

[0199] An embodiment of the present application further provides a computer readable storage medium, which stores instructions, and when the instructions are run on a processor, the method flow of the method embodiments is realized.

[0200] An embodiment of the present application further provides a computer program product, and when the computer program product is run on a processor, the method flow of the method embodiments is realized.

[0201] ​It should be noted that, for the foregoing method embodiments, the sequences of the described actions are not necessarily required to implement the application and some of the actions can be performed in other sequences, or even at the same time. Additionally, it should be noted that described embodiments are to be considered as illustrative only and not restrictive in character, as some of the actions and modules involved are not required for the application.

[0202] It should be noted that, for the foregoing method embodiments, the sequences of the described actions are not necessarily required to implement the application and some of the actions can be performed in other sequences, or even at the same time. Additionally, it should be noted that described embodiments are to be considered as illustrative only and not restrictive in character, as some of the actions and modules involved are not required for the application.

[0203] The descriptions of the various embodiments provided by the application can be mutually referred to, and the descriptions of the various embodiments each have a focus. The parts not described in detail in a certain embodiment can be referred to the relevant descriptions of other embodiments. For the convenience and brevity of description, for example, the functions of the various devices and the operations performed by the devices provided by the embodiments of the application can be referred to the relevant descriptions of the method embodiments of the application, and the method embodiments and the device embodiments can also be referred to, combined or cited.

[0204] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A secondary cell group configuration method, characterized in that, The method is applied to a source master base station MN, and the method comprises: sending a conditional handover request message to a candidate MN; receiving a conditional handover request acknowledgement message from the candidate MN, the conditional handover request acknowledgement message comprising configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG; sending the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device, the candidate MCG corresponding to a handover condition, the candidate MCG being associated with the candidate SCG, the candidate SCG corresponding to a handover condition or the candidate SCG not corresponding to a handover condition.

2. The method of claim 1, wherein, The conditional handover request message comprises capability information of the terminal device, the capability information of the terminal device being used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

3. The method of claim 1 or 2, wherein, The conditional handover request acknowledgement message further comprises first indication information, the first indication information being used to indicate a configuration mode corresponding to configuration information of a target side or a configuration mode corresponding to configuration information of the candidate SCG. The target side comprises the candidate MCG and the candidate SCG, the configuration mode corresponding to the configuration information of the target side being an incremental signaling configuration mode or a full configuration mode, and the configuration mode corresponding to the configuration information of the candidate SCG being an incremental signaling configuration mode or a full configuration mode.

4. The method of claim 1 or 2, wherein, The configuration mode corresponding to the configuration information of the target side is an incremental signaling configuration mode, or the configuration mode corresponding to the configuration information of the candidate SCG is an incremental signaling configuration mode, and the method further comprises: sending a notification message to the candidate MN, the notification message being used to notify that configuration parameters of a source SCG are updated, the notification message comprising updated configuration parameters of the source SCG.

5. The method of claim 4, wherein, The method further comprises: receiving updated configuration information of the candidate SCG and configuration information of the candidate MCG from the candidate MN, the updated configuration information of the candidate SCG being set on the basis of the updated configuration parameters of the source SCG.

6. The method of claim 1 or 5, wherein, The configuration information of the candidate SCG is used to indicate whether the conditional handover request acknowledgement message contains configuration information of the candidate SCG.

7. A secondary cell group configuration method, comprising: The method is applied to a candidate master base station MN, and the method comprises: receiving a conditional handover request message from a source MN; sending a conditional handover request acknowledgement message to the source MN, the conditional handover request acknowledgement message comprising configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG, the candidate MCG corresponding to a handover condition, the candidate MCG being associated with the candidate SCG, the candidate SCG corresponding to a handover condition or the candidate SCG not corresponding to a handover condition.

8. The method of claim 7, wherein, The conditional handover request message comprises capability information of the terminal device, the capability information of the terminal device being used to indicate that the terminal device has the capability of simultaneously configuring the candidate MCG and the candidate SCG.

9. The method of claim 7, wherein, The conditional handover request acknowledgement message further comprises first indication information, the first indication information being used to indicate a configuration mode corresponding to configuration information of a target side or a configuration mode corresponding to configuration information of the candidate SCG. The target side includes the candidate MCG and the candidate SCG; configuration information of the target side corresponds to an incremental signaling configuration mode or a full configuration mode; and configuration information of the candidate SCG corresponds to an incremental signaling configuration mode or a full configuration mode.

10. The method of any of claims 7-9, wherein, The configuration information of the target side corresponds to an incremental signaling configuration mode, or the configuration information of the candidate SCG corresponds to an incremental signaling configuration mode, and the method further includes: receiving a notification message from the source MN, the notification message being used to notify that configuration parameters of a source SCG are updated, and the notification message including updated configuration parameters of the source SCG; if the updated configuration parameters of the source SCG are associated with configuration parameters of the candidate SCG, updating configuration information of the candidate SCG based on the updated configuration parameters of the source SCG; sending the updated configuration information of the candidate SCG and configuration information of a candidate MCG to the source MN.

11. The method according to any one of claims 7-9, characterized in that, The configuration information of the candidate secondary cell group SCG is used to indicate whether the conditional handover request acknowledgement message contains configuration information of the candidate SCG.

12. A secondary cell group configuration method, comprising: The method is applied to a terminal device, and the method includes: receiving configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG from a source master base station MN, the candidate MCG corresponding to a handover condition, the candidate MCG being associated with the candidate SCG, and the candidate SCG corresponding to a handover condition or not corresponding to a handover condition; accessing the candidate MCG if the candidate MCG corresponds to the handover condition.

13. The method of claim 12, wherein, The method further includes: if no master-secondary cell handover condition corresponding to the candidate SCG is configured, accessing the candidate SCG according to the configuration information of the candidate SCG when accessing the candidate MN according to the configuration information of the candidate MCG.

14. The method of claim 12, wherein, The method further includes: if the master-secondary cell handover condition corresponding to the candidate SCG is configured, accessing the candidate SCG according to the configuration information of the candidate SCG when the master-secondary cell handover condition corresponding to the candidate SCG is met after accessing the candidate MN according to the configuration information of the candidate MCG.

15. The method of claim 14, wherein, The number of the candidate SCGs is one or more, and each candidate SCG corresponds to a master-secondary cell handover condition.

16. A secondary cell group configuration device, characterized in that, The apparatus includes: a sending unit configured to send a conditional handover request message to a candidate master base station MN; a receiving unit configured to receive a conditional handover request acknowledgement message from the candidate MN, the conditional handover request acknowledgement message including configuration information of a candidate master cell group MCG and configuration information of a candidate secondary cell group SCG, the candidate MCG corresponding to a handover condition, the candidate MCG being associated with the candidate SCG, and the candidate SCG corresponding to a handover condition or not corresponding to a handover condition; the sending unit is further configured to send the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device.

17. A secondary cell group configuration device, characterized in that, The apparatus includes: a receiving unit configured to receive a conditional handover request message from a source master base station MN; The sending unit is configured to send a conditional handover request acknowledgement message to the source MN, wherein the conditional handover request acknowledgement message comprises configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG), the candidate MCG corresponds to a handover condition, the candidate MCG is associated with the candidate SCG, and the candidate SCG corresponds to a handover condition or does not correspond to a handover condition.

18. A secondary cell group configuration device, characterized in that, The device comprises: The receiving unit is configured to receive configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG) from a source master base station (MN), the candidate MCG corresponds to a handover condition, the candidate MCG is associated with the candidate SCG, and the candidate SCG corresponds to a handover condition or does not correspond to a handover condition. The processing unit is configured to access the candidate MCG if the handover condition corresponding to the candidate MCG is met.

19. A chip, characterized by The processor is configured to perform the following operations: sending a conditional handover request message to a candidate master base station (MN); receiving a conditional handover request acknowledgement message from the candidate MN, wherein the conditional handover request acknowledgement message comprises configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG), the candidate MCG corresponds to a handover condition, the candidate MCG is associated with the candidate SCG, and the candidate SCG corresponds to a handover condition or does not correspond to a handover condition; sending the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device.

20. A chip, characterized by The processor is configured to perform the following operations: receiving a conditional handover request message from a source master base station (MN); sending a conditional handover request acknowledgement message to the source MN, wherein the conditional handover request acknowledgement message comprises configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG), the candidate MCG corresponds to a handover condition, the candidate MCG is associated with the candidate SCG, and the candidate SCG corresponds to a handover condition or does not correspond to a handover condition.

21. A chip, characterized by The processor is configured to perform the following operations: receiving configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG) from a source master base station (MN), the candidate MCG corresponds to a handover condition, the candidate MCG is associated with the candidate SCG, and the candidate SCG corresponds to a handover condition or does not correspond to a handover condition; and accessing the candidate MCG if the handover condition corresponding to the candidate MCG is met.

22. A modular device, comprising: The module device comprises a communication module, a power supply module, a storage module, and a chip. The power supply module is configured to provide power for the module device. The storage module is configured to store data and instructions. The communication module is configured to perform internal communication of the module device or to perform communication between the module device and an external device. The chip is configured to: receive a conditional handover request confirmation message from the candidate MN, the conditional handover request confirmation message comprising configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG), the candidate MCG corresponding to a handover condition, the candidate MCG being associated with the candidate SCG, the candidate SCG corresponding to a handover condition or the candidate SCG not corresponding to a handover condition; and send the configuration information of the candidate MCG and the configuration information of the candidate SCG to a terminal device.

23. A modular device, comprising: The module device comprises a communication module, a power module, a storage module, and a chip. The power module is configured to provide power for the module device. The storage module is configured to store data and instructions. The communication module is configured to perform internal communication of the module device, or to perform communication between the module device and an external device. The chip is configured to: receive a conditional handover request message from a source master base station (MN); and send a conditional handover request confirmation message to the source MN, the conditional handover request confirmation message comprising configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG), the candidate MCG corresponding to a handover condition, the candidate MCG being associated with the candidate SCG, the candidate SCG corresponding to a handover condition or the candidate SCG not corresponding to a handover condition.

24. A modular device, comprising: The module device comprises a communication module, a power module, a storage module, and a chip. The power module is configured to provide power for the module device. The storage module is configured to store data and instructions. The communication module is configured to perform internal communication of the module device, or to perform communication between the module device and an external device. The chip is configured to: receive configuration information of a candidate master cell group (MCG) and configuration information of a candidate secondary cell group (SCG) from a source master base station (MN), the candidate MCG corresponding to a handover condition, the candidate MCG being associated with the candidate SCG, the candidate SCG corresponding to a handover condition or the candidate SCG not corresponding to a handover condition; and access the candidate MCG when the candidate MCG corresponding handover condition is met.

25. A base station, comprising: The memory is configured to store a computer program, the computer program comprising program instructions, and the processor is configured to invoke the program instructions to execute the method in any one of claims 1-6 or claims 7-11.

26. A terminal device, comprising: The memory is configured to store a computer program, the computer program comprising program instructions, and the processor is configured to invoke the program instructions to execute the method in any one of claims 12-15.

27. A computer-readable storage medium, characterized in that, The computer storage medium stores computer readable instructions, when the computer readable instructions run on a communication device, cause the communication device to execute the method in any one of claims 1-6 or claims 7-11, or cause the communication device to execute the method in any one of claims 12-15.

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