CN113498620A

CN113498620A - Method and device for cell switching

Info

Publication number: CN113498620A
Application number: CN201980092798.8A
Authority: CN
Inventors: 尤心; 卢前溪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2021-10-12
Anticipated expiration: 2039-08-16
Also published as: CN113498620B; WO2021031012A1

Abstract

The application provides a method and equipment for cell switching, and provides a mode for cell switching of terminal equipment. The method comprises the following steps: and the terminal equipment executes a first operation according to the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a double active stack and switching based on a non-double active stack.

Description

Method and device for cell switching

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for cell handover.

Background

A New Radio (NR) system supports cell handover, for example, when a terminal device moves from one cell to another cell, or due to reasons such as adjustment of wireless communication traffic load, activation of operation maintenance, and device failure, in order to ensure communication continuity and service quality, a communication link between the terminal device and a source cell base station needs to be transferred to a target cell base station, that is, a handover procedure is performed.

When the terminal equipment performs cell switching, the terminal equipment can execute switching based on the dual-active stack and can also execute switching based on the non-dual-active stack. In this case, how the terminal device should perform cell handover becomes an urgent problem to be solved.

Disclosure of Invention

The application provides a method and equipment for cell switching, and provides a mode for cell switching of terminal equipment.

In a first aspect, a method for cell handover is provided, including: and the terminal equipment executes a first operation according to the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a double active stack and switching based on a non-double active stack.

In a second aspect, a method for cell handover is provided, including: and the source cell executes a first operation based on the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a dual active stack and switching based on a non-dual active stack.

In a third aspect, a method for cell handover, includes: and the target cell executes a first operation according to the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a dual active stack and switching based on a non-dual active stack.

In a fourth aspect, a terminal device is provided, configured to perform the method in the first aspect or each implementation manner thereof.

Specifically, the terminal device includes a functional module for executing the method in the first aspect or each implementation manner thereof.

In a fifth aspect, a network device is provided for executing the method in the second aspect or its implementation manners.

In particular, the network device comprises functional modules for performing the methods of the second aspect or its implementations described above.

In a sixth aspect, a network device is provided for performing the method of the third aspect or its implementation manners.

In particular, the network device comprises functional modules for performing the method of the third aspect or its implementations.

In a seventh aspect, a terminal device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method in the first aspect or each implementation manner thereof.

In an eighth aspect, a network device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method of the second aspect or each implementation mode thereof.

In a ninth aspect, a network device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method in the third aspect or each implementation manner thereof.

In a tenth aspect, there is provided an apparatus for implementing the method of any one of the first to third aspects or implementations thereof.

Specifically, the apparatus includes: a processor configured to call and run the computer program from the memory, so that the apparatus on which the apparatus is installed performs the method according to any one of the first to third aspects or the implementation manners thereof.

In an eleventh aspect, a computer-readable storage medium is provided for storing a computer program, which causes a computer to perform the method of any one of the first to third aspects or implementations thereof.

In a twelfth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of any one of the first to third aspects or implementations thereof.

In a thirteenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of any one of the above first to third aspects or implementations thereof.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system to which an embodiment of the present application is applied.

Fig. 2 is a schematic diagram of a contention-based random access procedure according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a non-contention based random access procedure according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a cell handover method according to an embodiment of the present application.

Fig. 5 is a schematic flowchart of a method for cell handover according to an embodiment of the present application.

Fig. 6 is a schematic flow chart of another method for cell handover according to an embodiment of the present application.

Fig. 7 is a schematic flow chart of another method for cell handover according to an embodiment of the present application.

Fig. 8 is a schematic flowchart of another method for cell handover according to an embodiment of the present application.

Fig. 9 is a schematic flowchart of another method for cell handover according to an embodiment of the present application.

Fig. 10 is a schematic block diagram of a terminal device provided in an embodiment of the present application.

Fig. 11 is a schematic block diagram of a network device according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of another network device provided in an embodiment of the present application.

Fig. 13 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application.

Fig. 14 is a schematic configuration diagram of an apparatus according to an embodiment of the present application.

Fig. 15 is a schematic block diagram of a communication system of an embodiment of the present application.

Detailed Description

Fig. 1 is a schematic diagram of a system 100 according to an embodiment of the present application.

As shown in fig. 1, the terminal device 110 is connected to a first network device 130 under a first communication system and a second network device 120 under a second communication system, for example, the first network device 130 is a network device under Long Term Evolution (LTE), and the second network device 120 is a network device under New Radio (NR).

The first network device 130 and the second network device 120 may include a plurality of cells.

It should be understood that fig. 1 is an example of a communication system of the embodiment of the present application, and the embodiment of the present application is not limited to that shown in fig. 1.

As an example, a communication system adapted by the embodiment of the present application may include at least a plurality of network devices under the first communication system and/or a plurality of network devices under the second communication system.

For example, the system 100 shown in fig. 1 may include one primary network device under a first communication system and at least one secondary network device under a second communication system. At least one auxiliary network device is connected to the one main network device, respectively, to form a multi-connection, and is connected to the terminal device 110, respectively, to provide a service thereto. In particular, terminal device 110 may establish a connection through both the primary network device and the secondary network device.

Optionally, the connection established between the terminal device 110 and the primary network device is a primary connection, and the connection established between the terminal device 110 and the auxiliary network device is an auxiliary connection. The control signaling of the terminal device 110 may be transmitted through the main connection, and the data of the terminal device 110 may be transmitted through the main connection and the auxiliary connection simultaneously, or may be transmitted through only the auxiliary connection.

As still another example, the first communication system and the second communication system in the embodiment of the present application are different, but the specific category of the first communication system and the second communication system is not limited.

For example, the first communication system and the second communication system may be various communication systems, such as: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, a Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), and the like.

The primary network device and the secondary network device may be any access network device.

Optionally, in some embodiments, the Access network device may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) System or a Code Division Multiple Access (CDMA) System, a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) System, or an evolved Node B (eNB or eNodeB) in a Long Term Evolution (Long Term Evolution) System.

Optionally, the Access Network device may also be a Next Generation Radio Access Network (NG RAN), or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the Access Network device may be a relay station, an Access point, a vehicle-mounted device, a wearable device, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.

In the system 100 shown in fig. 1, the first network device 130 is taken as a main network device, and the second network device 120 is taken as an auxiliary network device.

The first network device 130 may be an LTE network device and the second network device 120 may be an NR network device. Alternatively, the first network device 130 may be an NR network device and the second network device 120 may be an LTE network device. Or both the first network device 130 and the second network device 120 may be NR network devices. Alternatively, the first network device 130 may be a GSM network device, a CDMA network device, etc., and the second network device 120 may also be a GSM network device, a CDMA network device, etc. Alternatively, the first network device 130 may be a macro base station (Macrocell), and the second network device 120 may be a microcellular base station (Microcell), a picocellular base station (Picocell), a Femtocell base station (Femtocell), or the like.

Optionally, the terminal device 110 may be any terminal device, and the terminal device 110 includes but is not limited to:

via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a Digital cable, a direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

It should be understood that the terms "system" and "network" are often used interchangeably herein.

In this embodiment of the present application, a network device provides a service for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), Micro cells (Micro cells), Pico cells (Pico cells), Femto cells (Femto cells), and the like, and the small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services.

It should be understood that the method of the embodiments of the present application may be used to transmit various types of services.

Such as enhanced mobile broadband (eMBB), which targets users to obtain multimedia content, services, and data, the demand for eMBB is growing rapidly. For another example, the eMBB may be deployed in different scenarios, such as indoor, urban, rural, etc., and the difference between the capabilities and the requirements of the eMBB is relatively large, so the eMBB may be analyzed in detail in combination with a specific deployment scenario. Also for example URLLC, typical applications of URLLC include: industrial automation, electric power automation, remote medical operation (surgery), traffic safety, and the like. Typical characteristics of mtc include: high connection density, small data volume, insensitive time delay service, low cost and long service life of the module, etc.

In some special scenarios, the terminal device needs to initiate random access to the network device to establish a connection with the network device. There are various events that trigger the terminal device to perform random access, for example, in the initial access process of the terminal device; in the process of rebuilding the terminal equipment; when the terminal equipment has uplink data to be sent but detects uplink desynchronizing; when the terminal equipment has uplink data to be sent but does not have Scheduling Request (SR) resources; under the condition that the terminal equipment needs to carry out cell switching; when the base station has downlink data to be sent but detects that the uplink is out of step.

The random access of the terminal device may include contention-based random access and non-contention-based random access.

The contention-based random access procedure may be as described with reference to fig. 2.

S210, the terminal device transmits a message 1(message 1, MSG1) to the network device on the random access channel, and the MSG1 includes the random access preamble. Wherein the MSG1 may be a physical layer message.

S220, after receiving the MSG1, the network device may send the MSG2 on a downlink shared channel (DL-SCH), where the MSG2 may be a Random Access Response (RAR). The MSG2 may be a Media Access Control (MAC) layer message.

The RAR carries a Timing Advance (TA) of uplink transmission, uplink resource information that can be used, and a temporary cell radio network temporary identifier (T-CRNTI), that is, a temporary CRNTI.

Alternatively, the RAR may be generated by a Media Access Control (MAC) layer of the network device. One MSG2 may correspond to multiple terminal device random access request responses simultaneously.

In S230, the terminal device, after receiving MSG2, determines whether it belongs to its RAR message, and if it is determined that it belongs to its RAR message, transmits MSG3 in the uplink resource designated by MSG2, where MSG3 carries the terminal-specific RNTI. The MSG3 may be an RRC layer message.

In step 240, the network device, after receiving the MSG3, may send MSG4 to the terminal device. The MSG4 includes contention resolution information and uplink transmission resources allocated by the network device to the terminal device. The MSG4 may be a MAC layer message.

After receiving the MSG4, the terminal device may detect whether the specific RNTI transmitted in the MSG3 is included in the contention resolution message transmitted by the network device. If yes, the random access process of the terminal equipment is indicated to be successful, otherwise, the random access process is considered to be failed. After the random access procedure fails, the terminal device needs to initiate the random access procedure from the first step again.

Alternatively, MSG1 and MSG2 may not use the HARQ mechanism, and MSG3 and MSG4 may use the HARQ mechanism.

If one random access attempt fails, the terminal device may further initiate the next random access attempt until the maximum retransmission times and/or the maximum retransmission time allowed by the network side are reached.

Terminal devices typically perform random access by transmitting a preamble to the network device. After the terminal device transmits the preamble for the first time, if the current random access fails, the terminal device may transmit the preamble for the random access to the network device for a second time, and the transmission power of the preamble for the second time may be the transmission power of the preamble for the first time after the power ramp-up. The step size of the power ramp may be configured by the network device or may be pre-configured in the terminal device.

The non-contention based random access procedure may be as shown in fig. 3, for example.

S310, the network device sends MSG0 to the terminal device, and the MSG0 may include a preamble configuration message, where the preamble configuration message is used to indicate a preamble of the random access. The MSG0 may be a physical layer message.

S320, the terminal device sends MSG1 to the network device, and the MSG1 includes the random access preamble in S310. The MSG1 may be a physical layer message.

S330, the network device sends MSG2 to the terminal device, where MSG2 may be a random access response message. The MSG2 may be a MAC layer message.

In the non-contention based random access process, the terminal device may acquire a resource of non-contention random access through RRC signaling and/or PDCCH signaling, and perform random access on the non-contention random access resource.

The following describes a random access procedure of the terminal device by taking a handover procedure as an example. In the embodiment of the present application, a communication scenario of a handover process is not specifically limited, and for example, the communication scenario may be an LTE system or an NR system.

When a terminal device using network service moves from a source cell to a coverage area of a target cell, or due to reasons such as adjustment of wireless transmission service load, activation of operation maintenance, and device failure, in order to ensure continuity of terminal device communication and quality of service, a communication system needs to transfer a communication link between the terminal device and the source cell to the target cell, that is, to perform a cell handover procedure. The source cell may be understood as a cell to which the terminal device is currently connected, and the target cell may be understood as a cell to which the terminal device is to be handed over.

The cell handover method of the terminal device in the embodiment of the present application is not particularly limited, for example, the terminal device may perform an intra-site handover, that is, the source cell and the target cell belong to the same base station. For another example, the terminal device may perform handover between base stations, that is, the source cell and the target cell belong to different base stations.

The embodiment of the present application does not limit the interface used for performing cell handover between base stations. For example, the cell handover may be based on an X2 interface or an Xn interface, or may also be based on an S1 interface or an N2 interface.

Taking an Xn interface as an example, the switching process of the terminal device can be divided into the following three stages: handover preparation, handover execution, and handover completion.

The handover preparation may include the terminal device measuring and reporting the link quality, sending a handover request to the source base station, and receiving a handover command sent by the source base station.

The handover execution may include the terminal device performing the handover procedure immediately after receiving the handover command sent by the source base station. For example, the connection with the source cell may be disconnected and the connection with the target cell may be completed (e.g., performing random access, sending an RRC handover complete message to the target base station, etc.), Serial Number (SN) status transfer, data forwarding, and so on.

The handover completion may include the target cell performing link handover with an access and mobility management function (AMF) and a User Plane Function (UPF), releasing the UE context of the source base station, and the like.

For the NR system, the link switching and releasing the UE context of the source base station may be performed by the AMF and the UPF, and for the LTE system, the link switching and releasing the UE context of the source base station may be performed by a Mobility Management Entity (MME). The embodiment of the present application does not specifically limit the applicable system, and may be applied to an LTE system or an NR system.

Specifically, as shown in FIG. 4, the handover preparation phase (401-405) may include:

in 401, the source base station triggers the terminal device to perform neighbor cell measurement, so that the terminal device can perform measurement on the neighbor cell and report the measurement result to the source base station.

In 402, the source base station evaluates the measurement result reported by the terminal device, and determines whether to trigger handover.

In 403, if the source base station decides to trigger handover, it may send a handover request to the target base station.

In 404, after receiving the handover request sent by the source base station, the target base station may start admission according to the service information carried by the source base station, and perform radio resource configuration.

In 405, the target base station sends a handover request acknowledgement message to the source base station, and returns an admission result and radio resource configuration information in the target base station to the source base station. At this point, the handover preparation phase is complete.

In the second phase, the handover execution phases (406-408) may include:

in 406, after receiving the handover request acknowledge message of the target base station, the source base station may trigger the terminal device to perform handover.

In 407, the source base station may forward buffered data, on-going packets, system sequence numbers of the data, etc. to the target base station. Also, the target base station may buffer data received from the source base station.

In addition, the terminal equipment can disconnect from the source base station and establish synchronization with the target base station.

In 408, the terminal device synchronizes to the target base station. At this point, the handover execution phase is complete.

In the third stage, the handover completion stage (409 ~ 412) may include:

in 409, the target base station sends a path switch request to a Mobility Management Function (AMF).

In 410, after receiving the path switch request from the target base station, the AMF performs path switch with a User Plane Function (UPF) and clears the path flag of the User Plane of the source base station.

In 411, after the path switch is completed, the AMF may transmit a path switch confirm message to the target base station.

In 412, the target base station sends a terminal device context release message to the source base station, informs the source base station of successful handover, and triggers the source base station to release the terminal device context. At this point, the handover is completed.

The terminal equipment starts a T304 timer immediately after receiving the switching command, starts downlink synchronization to a target cell, acquires Master Information Block (MIB) information of the target cell, and then initiates random access. And allowing a plurality of preamble (preamble) retransmissions in the random access process until the random access is successful. Further, if the T304 timer expires, which indicates a handover failure, the terminal device may directly trigger the RRC connection reestablishment procedure.

In the conventional handover process, after receiving a handover command, the terminal device disconnects the source base station and then establishes a connection with the target base station. Since the terminal device disconnects the source base station to communicate with the target base station, there is a time difference, which may be referred to as a handover interruption time.

The handover interruption time may be understood as a time difference between an end time of communication between the terminal device and the source base station and a start time of communication between the terminal device and the target base station, or may be understood as a time difference between a time of a last message transmitted between the terminal device and the source base station and a time of a first message transmitted between the terminal device and the target base station.

In the 3GPP mobility enhancement subject, an optimization method for reducing the handover interruption time during handover is proposed, which includes the following two architectures, and the scheme of the embodiment of the present application can be used for both architectures.

1. Handover based on dual connectivity, or referred to as split bearer (split bearer) based handover. In handover, a target base station is added as a Secondary Node (SN), and then the target base station is changed from the SN to a Master Node (MN) through role change signaling. And finally, releasing the source base station, thereby achieving the effect of reducing the switching interruption time.

2. eMBB-based handover, or referred to as non-split bearer (non-split bearer) -based handover, or referred to as dual active stack (dual active stack) -based handover. The switching mode can be based on the existing switching process, and only after receiving the switching command, the terminal equipment can continue to maintain the connection with the source base station, and simultaneously initiates random access to the target base station.

When the network device makes various event decisions or executes various algorithms, the capability of the terminal device needs to be known, so that the most appropriate decision can be made. Because the capabilities of different terminal devices are different or have large differences, the network device needs to acquire the capabilities of the terminal devices, the terminal devices need to report the UE capabilities, and then the network device can determine the configuration of the terminal devices in the network according to the UE capabilities.

In a conventional handover procedure, after receiving a handover command, a terminal device immediately performs cell handover, i.e. releases a connection with a source cell, and then initiates a connection with a target cell, that is, the terminal device only complies with the configuration of one serving cell at the same time, and the configuration of the serving cell is usually matched with the capability of the terminal device. However, for the handover of the dual active stack, the terminal device maintains the connection with the source cell and the target cell at the same time, and in this case, how the terminal device performs the cell handover becomes a problem to be solved urgently.

The embodiment of the application provides a method for cell switching, which can provide a reasonable mode for cell switching of terminal equipment. As shown in fig. 5, the method includes step 510.

And S510, according to the first information, executing a first operation, wherein the first operation is used for cell switching. The cell handover may include a dual active stack based handover and a non-dual active stack based handover.

The embodiments of the present application are described in detail below from the perspective of a terminal device, a source cell, and a target cell, respectively.

In the embodiment of the present application, a source cell may refer to a source cell base station, and a target cell may refer to a target cell base station.

For the terminal device, as an implementation manner, the terminal device may determine the handover type according to the first information.

The first information may be information from a source cell. After determining the handover type, the source cell may send first information to the terminal device, where the first information may be used for the terminal device to determine the handover type and/or adjust the first configuration.

The handover types may include dual active stack (dual active stack) based handover and non-dual active stack based handover, which may also be referred to as normal (normal) handover.

The switching based on the double active stacks indicates that the terminal equipment can simultaneously keep connection with the source cell and the target cell in the switching process.

The Normal handover may refer to a conventional handover manner, that is, after receiving a handover command, the terminal device disconnects the source cell and then initiates a connection to the target cell. During the normal handover, the terminal device does not maintain connection with the source cell and the target cell simultaneously.

The first configuration is a configuration of the terminal device under the source cell, that is, the first configuration is configured for the terminal device by a current serving cell (source cell) of the terminal device. Prior to cell handover, the terminal device communicates with the source cell using the first configuration.

Since the first configuration is already obtained by the terminal device before the cell handover, the source cell may not send the first configuration to the terminal device any more during the cell handover of the terminal device.

The first information may be used to indicate a handover type, for example, and if the first information indicates that the handover type is a dual active stack-based handover, the terminal device determines that the handover type is a dual active stack-based handover; if the first information indicates that the handover type is non-dual active stack based handover, that is, the first information indicates that the handover type is normal (normal) handover, the terminal device determines that the handover type is normal handover.

The terminal device may further decrease the first configuration based on the first information if the first information indicates that the handover type is a dual active stack based handover.

The first information may be carried in a measurement configuration message, and the source cell may indicate the handover type to the terminal device through the measurement configuration message.

The first information may for example be used to instruct an adjustment of the first configuration, in case the first information instructs the terminal device to decrease the first configuration, the terminal device determines the handover type as a reduced active stack based handover.

In addition, the terminal device lowers the first configuration in a case where the first information instructs the terminal device to lower the first configuration.

The first information may be a Radio Resource Control (RRC) reconfiguration message, and the source cell may indicate to the terminal device to adjust the first configuration through the RRC reconfiguration message. The RRC reconfiguration message may be sent to the terminal device while sending the measurement configuration information, or may be sent to the terminal device after sending the measurement configuration message.

After the first configuration is reduced, the terminal device may send second information to the source cell, where the second information is used to indicate that the reduction of the first configuration by the terminal device is completed. In this way, the source cell may determine whether to perform a dual active stack based handover depending on whether the terminal device lowers the first configuration.

For example, as shown in FIG. 6, the method includes steps S610 to S680.

Before cell switching, the terminal device performs data transmission with a source cell and a User Plane Function (UPF).

S610, after determining the handover type, the source cell may send first information to the terminal device, where the first information is used for the terminal device to determine the handover type and/or reduce the first configuration.

The source cell may determine the handover type and whether the first configuration needs to be reduced according to whether the source cell and the terminal device support the dual active stack-based handover, the first configuration, the capability of the terminal device, and the like.

If the source cell and the terminal device both support the dual active stack-based handover and the first configuration occupies most of the terminal device's capability, the source cell may send first information to the terminal device, the first information instructing the terminal device to lower the first configuration.

And S620, after the terminal equipment receives the first information, reducing the first configuration.

The source cell may indicate to the terminal device to lower the first configuration in the following two ways.

Mode 1, a source cell sends a measurement configuration message to a terminal device, where the measurement configuration message carries indication information indicating that the measurement configuration is used for the terminal device to perform a dual active stack-based handover. The terminal device may automatically lower the first configuration after receiving the measurement configuration message.

In mode 2, the source cell may send, to the terminal device, an RRC reconfiguration message while sending the measurement configuration message or after sending the measurement configuration message, where the RRC reconfiguration message includes indication information, and the indication information is used to indicate the terminal device to reduce the first configuration. After receiving the RRC reconfiguration message, the terminal equipment determines that the switching type is switching based on a dual active stack and reduces the first configuration.

S630, the terminal device may send a measurement report to the source cell.

The measurement configuration message sent by the source cell to the terminal device may include a measurement event, for example, the measurement configuration message may include a threshold of the channel quality of the target cell and/or a threshold of the channel quality of the source cell. After receiving the measurement configuration message, the terminal device may measure a measurement event in the measurement configuration message, and when the measurement event is satisfied, if the measured channel quality of the target cell is higher than the configured threshold and/or the measured channel quality of the source cell is lower than the configured threshold, the terminal device may send a measurement report to the source cell. In this embodiment of the application, the measurement report may carry indication information, where the indication information is used to indicate that the terminal device completes the reduction of the first configuration.

After the source cell receives the measurement report, a handover decision may be made based on the measurement report S640. E.g., the source cell, may determine the target cell based on the measurement report.

S650, the source cell sends a switching request message to the target cell.

And S660, the target cell makes an access decision. For example, after the target cell receives the handover request message sent by the source cell, it may determine whether to allow the terminal device to access the target cell according to its own condition.

S670, if the target cell allows the terminal device to access to the cell, the target cell may send a handover request response to the source cell.

S680, after receiving the handover request response sent by the target cell, the source cell may send a handover command to the terminal device according to a specific situation.

The terminal device may then perform cell handover according to the handover command sent by the source cell.

For the terminal device, as another implementation manner, the terminal device may perform a first operation according to the first information, where the first operation includes at least one of: determining a handover type, adjusting a first configuration, adjusting a second configuration. The second configuration is a configuration of the terminal device in the target cell, that is, the second configuration is configured by the target cell for the terminal device.

The second configuration may be determined by the target cell after receiving the handover request sent by the source cell, and then the target cell may send the second configuration to the source cell, and then the source cell sends the second configuration to the terminal device.

Optionally, the first information may include the first configuration, the second configuration and the capability of the terminal device, that is, the terminal device may perform the first operation according to the first configuration, the second configuration and the capability of the terminal device.

For example, the terminal device may determine the handover type based on the first configuration, the second configuration, and the capabilities of the terminal device. For another example, the terminal device may adjust the first configuration and/or the second configuration based on the first configuration, the second configuration, and the capabilities of the terminal device.

And in the case that the sum of the first configuration and the second configuration does not exceed the capability of the terminal equipment, the terminal equipment determines the switching type to be switching based on a dual-active stack or switching based on a non-dual-active stack.

That is, if the sum of the first configuration and the second configuration does not exceed the capability of the terminal device, the terminal device may perform a handover based on the dual active stack based on the first configuration and the second configuration, and may also perform a handover based on the second configuration to perform a handover of a non-dual active stack.

In the event that the sum of the first configuration and the second configuration exceeds the capabilities of the terminal device, the terminal device may perform at least one of the following operations: and determining the switching type to be switching based on the non-double active stack, reducing the first configuration and reducing the second configuration.

That is, if the sum of the first configuration and the second configuration exceeds the capability of the terminal device, the terminal device may choose to perform a non-dual active stack based handover, or the terminal device may perform a dual active stack based handover by lowering the first configuration and/or lowering the second configuration.

The terminal device may decrease the first configuration and/or decrease the second configuration, so that the decreased configuration does not exceed the capability of the terminal device, thereby avoiding an additional connection re-establishment procedure due to the configuration exceeding the capability of the terminal device.

The second configuration may be obtained by the terminal device by receiving a handover command sent by the source cell. For example, after receiving a handover request sent by a source cell, a target cell may generate a handover command, where the handover command includes a second configuration; the target cell may then send the generated handover command to the source cell, and then the source cell sends the handover command to the terminal device, so that the terminal device obtains a second configuration configured for the terminal device by the target cell.

For the terminal device, as a further implementation manner, the terminal device may perform a first operation according to the first information, where the first operation includes at least one of: determining a switching type, adjusting the second configuration and adjusting the third configuration. The second configuration is a configuration of the terminal device in the target cell, and the second configuration may be determined by the target cell after receiving a handover request sent by the source cell, for example; and the third configuration is the configuration of the terminal equipment under the source cell after the target cell is adjusted. After the target cell determines the second configuration and the third configuration, the second configuration and the third configuration may be sent to the source cell, and then sent to the terminal device by the source cell.

Specifically, the target cell may receive a handover request message sent by the source cell, where the handover request message may include the capability of the terminal device and the first configuration, the handover request message is further used to indicate a handover type, and the target cell may determine the second configuration according to a specific situation. In some cases, the target cell may also modify the first configuration, and if the first configuration occupies most of the terminal device's capability, the target cell may decrease the first configuration to form a third configuration. The target cell may send the determined second configuration and the determined third configuration to the source cell through a handover command, and then the source cell sends the second configuration and the third configuration to the terminal device.

Optionally, the first information may include the second configuration, the third configuration and the capability of the terminal device, that is, the terminal device may perform the first operation according to the second configuration, the third configuration and the capability of the terminal device.

For example, the terminal device may determine the handover type according to the second configuration, the third configuration and the capabilities of the terminal device. For another example, the terminal device may adjust the second configuration and/or the third configuration based on the second configuration, the third configuration, and the capabilities of the terminal device.

And in the case that the sum of the second configuration and the third configuration does not exceed the capability of the terminal device, the terminal device may perform switching of dual active stacks based on the second configuration and the third configuration, and may also perform switching of non-dual active stacks based on the second configuration.

In the event that the sum of the second configuration and the third configuration exceeds the capability of the terminal device, the terminal device may perform at least one of the following operations: and determining the switching type to be switching based on the non-double active stack, reducing the second configuration and reducing the third configuration.

That is, if the sum of the second configuration and the third configuration exceeds the capability of the terminal device, in this case, even if the source cell indicates that the handover type is a dual active stack based handover, the terminal device may select to perform a non-dual active stack based handover. Alternatively, if the sum of the second configuration and the third configuration exceeds the capability of the terminal device, the terminal device may perform the dual activation stack based handover by lowering the second configuration and/or lowering the third configuration.

The terminal device may decrease the second configuration and/or decrease the third configuration, so that the decreased configuration does not exceed the capability of the terminal device, thereby avoiding an additional connection re-establishment procedure due to the configuration exceeding the capability of the terminal device.

The second configuration and the third configuration may be obtained by the terminal device by receiving a handover command sent by the source cell. For example, after receiving a handover request message sent by a source cell, a target cell may generate a handover command, where the handover command includes a second configuration and a third configuration; the target cell may then send the generated handover command to the source cell, which in turn is sent to the terminal device.

The terminal device may perform cell handover based on the second configuration, in a case where it is determined that the handover type is handover based on the non-dual active stack.

For example, as shown in FIG. 7, the method includes steps S710-S790.

Before cell switching, the terminal equipment transmits data with a source cell and a UPF.

S710, the source cell sends a measurement configuration message to the terminal equipment. The measurement configuration message includes a measurement event.

And S720, when the condition corresponding to the measurement event in the measurement configuration message is satisfied, the terminal equipment generates a measurement report and sends the measurement report to the source cell.

And S730, the source cell makes a switching decision according to the measurement report. For example, the source cell may determine whether the terminal device needs to perform cell handover according to the measurement report; as another example, the source cell may determine the target cell from the measurement report.

S740, if the source cell determines that the terminal device needs to perform cell handover, the source cell may send a handover request message to the target cell.

And S750, the target cell makes an access decision. If the target cell receives the handover request message, it can determine whether to allow the terminal device to access according to its own implementation.

S760, if the target cell allows the terminal device to access the cell, the target cell may send a handover request response to the source cell, for example, the target cell may send a handover command to the source cell.

The second configuration may be included in the handover command. Or the second configuration and the third configuration may be included in the handover command.

S770, the source cell forwards the handover command to the target cell, and the handover command is further used for instructing the terminal device to perform handover based on the dual active stacks.

S780, after receiving the handover command, the terminal device checks whether the configuration of the source cell and the configuration of the target cell match the capability of the terminal device.

For example, if only the second configuration is included in the handover command, the terminal device may determine whether the sum of the first configuration and the second configuration sent by the previous source cell exceeds the capability of the terminal device. For another example, if the second configuration and the third configuration are included in the handover command, the terminal device may determine whether the sum of the second configuration and the third configuration exceeds the capability of the terminal device.

S790, if the configuration of the source cell and the configuration of the target cell exceed the capability of the terminal equipment, the terminal equipment can select to execute normal switching.

And then the terminal equipment performs cell switching based on the switching command sent by the source cell.

The reduction configuration in the embodiment of the present application may include canceling dual connectivity and/or canceling carrier aggregation.

Adjusting the first configuration may include at least one of: deleting the secondary cell in the dual connectivity, and deactivating or releasing the secondary carrier in the carrier aggregation.

Adjusting the second configuration may include at least one of: deleting the secondary cell in the dual connectivity, and deactivating or releasing the secondary carrier in the carrier aggregation.

Adjusting the third configuration may include at least one of: deleting the secondary cell in the dual connectivity, and deactivating or releasing the secondary carrier in the carrier aggregation.

The solution of the embodiment of the present application is described below by taking the source cell as an example, and reference may be made to the above description for corresponding technical features described below.

For the source cell, the source cell may perform a first operation for cell handover according to the first information. The cell handover may include a dual active stack based handover and a non-dual active stack based handover.

As an implementation manner, the first information may include a first configuration and a capability of the terminal device, and the source cell may determine the handover type according to the first configuration and the capability of the terminal device.

The definitions of the first configuration, the second configuration and the third configuration may refer to the above description, and are not repeated here.

For example, if the first configuration only occupies a small portion of the terminal device's capabilities, the source cell may determine that the handover type is a dual active stack based handover. For another example, if the first configuration occupies most of the capability of the terminal device, the source cell may determine that the handover type is a handover based on a dual active stack, and reduce the first configuration; the source cell may then send indication information to the terminal device to instruct the terminal device to lower the first configuration. For another example, if the first configuration occupies most of the capability of the terminal device, the source cell may determine that the handover type is a non-dual active stack based handover.

The source cell may send a first message to the terminal device, where the first message is used for the terminal device to determine the handover type. The first message may include the first information described above by taking the terminal device as an example, and as described above, the terminal device may perform the first operation according to the first information in the first message.

The first message may be, for example, a measurement configuration message, which is used to indicate a handover type; or the first message may be, for example, an RRC reconfiguration message indicating to adjust the first configuration.

The source cell may further receive second information sent by the terminal device, where the second information is used to instruct the terminal device to reduce the first configuration completion.

The second information may be carried in a measurement report.

After receiving the measurement report, the source cell may determine a target cell based on the measurement report, and send a handover request message to the determined target cell.

For the source cell, as another implementation manner, the source cell may receive a second message sent by the target cell, where the second message includes the second configuration. The source cell may perform a first operation according to the first configuration, the second configuration and the capability of the terminal device, the first operation including at least one of: determining a handover type, adjusting the first configuration, adjusting the second configuration, and determining whether to send a handover command to the terminal device.

In the case that the sum of the first configuration and the second configuration does not exceed the capability of the terminal device, the source cell may determine the handover type as a handover based on a dual active stack or determine the handover type as a handover based on a non-dual active stack.

In the case that the sum of the first configuration and the second configuration exceeds the capability of the terminal device, the source cell may not send a handover command to the terminal device, or decrease the first configuration, or determine the handover type to be a non-dual active stack based handover.

In some cases, the source cell may also implement the dual activation stack based handover by lowering the first configuration and/or lowering the second configuration in case the sum of the first configuration and the second configuration exceeds the capability of the terminal device.

The second message may be, for example, a handover command, and the target cell may send the second configuration to the source cell through the handover command.

For the source cell, as yet another implementation manner, the source cell may receive a third message sent by the target cell, where the third message includes the second configuration and the third configuration. The source cell may perform a first operation according to the second configuration, the third configuration and the capability of the terminal device, the first operation including at least one of: determining the switching type, adjusting the second configuration, adjusting the third configuration and determining whether to send a switching command to the terminal equipment.

In the case that the sum of the second configuration and the third configuration does not exceed the capability of the terminal device, the source cell may determine the handover type as a handover based on a dual active stack or determine the handover type as a handover based on a non-dual active stack.

In the case that the sum of the second configuration and the third configuration exceeds the capability of the terminal device, the source cell may not send a handover command to the terminal device, or decrease the third configuration, or determine the handover type to be a non-dual active stack based handover.

In some cases, the source cell may also implement the dual activation stack based handover by lowering the second configuration and/or lowering the third configuration in case the sum of the second configuration and the third configuration exceeds the capability of the terminal device.

The third message may be, for example, a handover command, and the target cell may send the second configuration and the third configuration to the source cell through the handover command.

The source cell can send a dual active stack switching command to the terminal equipment under the condition that the switching type is determined to be switching based on the dual active stacks; the source cell may send a handover command of normal handover to the terminal device when determining that the handover type is the handover based on the non-dual active stack.

The source cell may send a handover request message to the plurality of candidate target cells, and then the source cell may select a candidate target cell for cell handover according to the second configuration fed back by the plurality of candidate target cells. For example, the source cell sends handover request messages to a plurality of target cells, some target cells feed back second configuration based on normal handover, some target cells feed back configuration based on dual active stack handover, and the source cell may select a target cell based on the type of handover that is desired to be triggered.

The solution of the embodiment of the present application is described below by taking a target cell as an example, and reference may be made to the above description for corresponding technical features described below.

For the target cell, the target cell may perform a first operation for cell handover according to the first information. The cell handover may include a dual active stack based handover and a non-dual active stack based handover.

The first information may include a first configuration and a capability of the terminal device, and in a case that the target cell supports dual active stack handover, the target cell may perform a first operation according to the first configuration and the capability of the terminal device, where the first operation includes at least one of: determining a handover type, determining a second configuration, determining a third configuration.

For example, if the first configuration occupies a large portion of the terminal device's capabilities, the target cell may determine that the handover type is a non-dual active stack based handover.

For another example, the target cell may determine the second configuration according to the first configuration and the capability of the terminal device, so that the sum of the first configuration and the second configuration does not exceed the capability of the terminal device, and an additional connection re-establishment procedure caused by the sum of the first configuration and the second configuration exceeding the capability of the terminal device can be avoided.

After the target cell determines the second configuration, a first message may be sent to the source cell, where the first message includes the second configuration. The first message may be, for example, a handover command.

For another example, the target cell may reduce the first configuration according to the first configuration and the capability of the terminal device, generate the third configuration, and determine the second configuration, so that the sum of the second configuration and the third configuration does not exceed the capability of the terminal device, thereby avoiding an additional connection re-establishment process caused by the sum of the second configuration and the third configuration exceeding the capability of the terminal device.

After determining the second configuration and the third configuration, the target cell may send a second message to the source cell, where the first message includes the second configuration and the third configuration. The second message may be, for example, a handover command.

Optionally, the target cell may receive a handover request message sent by the source cell, where the handover request message may include the first configuration and the capability of the terminal device, and the handover request message is further used to indicate a handover type, and for example, the handover request message indicates that the handover type is a dual active stack based handover.

After the target cell receives the handover request message, if the target cell does not support the handover based on the dual active stacks, the target cell may send a handover request reject message to the source cell, or the target cell determines that the handover type is the handover based on the non-dual active stacks.

If the target cell determines that the handover type is the handover based on the non-dual active stack, the target cell may send a handover command to the source cell, where the handover command includes a second configuration, and the second configuration may be determined based on all capabilities of the terminal device.

The solution of the embodiment of the present application is described below with reference to fig. 8 and 9.

For example, as shown in FIG. 8, the method includes steps S810 to S880.

S810, the source cell sends a measurement configuration message to the terminal equipment. The measurement configuration message includes a measurement event.

And S820, when the condition corresponding to the measurement event in the measurement configuration message is satisfied, the terminal equipment generates a measurement report and sends the measurement report to the source cell.

The source cell makes a handover decision based on the measurement report S830, e.g., the source cell may determine at least one target cell based on the measurement report.

S840, the source cell sends a handover request message to the at least one target cell. The handover request message includes the configuration (first configuration) of the source cell and the capability of the terminal device. Optionally, the handover request message may further carry indication information, where the indication information is used to indicate a handover type.

S850, after receiving the handover request message, the target cell may make an access decision according to the handover request message.

S860, assume that the handover type indicated in the handover request message is a handover based on dual active stacks. If the target cell does not support the handover based on the dual activation stack, the target cell may send a handover command based on the normal handover to the source cell.

S870, the source cell sends the received handover command to the terminal device.

S880, the terminal equipment carries out cell switching based on the switching command sent by the source cell.

For example, as shown in fig. 9, the method includes steps S910 to S990.

S910, the source cell sends a measurement configuration message to the terminal equipment. The measurement configuration message includes a measurement event.

And S920, when the condition corresponding to the measurement event in the measurement configuration message is satisfied, the terminal equipment generates a measurement report and sends the measurement report to the source cell.

S930, the source cell makes a handover decision based on the measurement report, e.g. the source cell determines at least one target cell based on the measurement report.

S940, the source cell sends a handover request message to the at least one target cell. The handover request message includes the configuration (first configuration) of the source cell and the capability of the terminal device. Optionally, the handover request message may further carry indication information, where the indication information is used to indicate a handover type.

S950, after the target cell receives the handover request message, the target cell may make an access decision according to the handover request message.

The target cell may determine the handover command of the target cell, i.e. determine the configuration (second configuration) of the target cell, based on the first configuration and the capabilities of the terminal device.

Assuming that the handover type indicated in the handover request message is handover based on a dual active stack, if the target cell supports handover based on a dual active stack, the target cell may determine a second configuration according to the first configuration and the capability of the terminal device; or if the target cell supports dual active stack based handover, the target cell may determine the second configuration and the adjusted configuration of the source cell according to the first configuration and the capability of the terminal device (third configuration).

S960, the target cell sends a switching command of the switching request response to the source cell, and indicates that the switching command is a switching command based on the dual active stacks. The second configuration may be included in the handover command, or the second configuration and the third configuration may be included in the handover command.

S970, after receiving the handover command sent by the target cell, the source cell may check whether the sum of the configuration of the source cell and the configuration of the target cell exceeds the capability of the terminal device.

And S980, if the sum of the configuration of the source cell and the configuration of the target cell exceeds the capability of the terminal equipment, the source cell can send a switching command based on normal switching to the terminal equipment.

For example, if only the second configuration is included in the handover command received by the source cell, the source cell may determine whether the sum of the second configuration and the first configuration previously sent to the terminal device exceeds the capability of the terminal device. For another example, if the handover command received by the source cell includes the second configuration and the third configuration, the source cell may determine whether the sum of the second configuration and the third configuration exceeds the capability of the terminal device.

S990, the terminal equipment carries out cell switching based on the switching command sent by the source cell.

The various embodiments described above may be used alone or in combination with one another, and the embodiments of the present application are not particularly limited thereto. For example, when the target cell generates the second configuration, it may be ensured that the sum of the first configuration and the second configuration does not exceed the capability of the terminal device, and the target cell may send the second configuration to the source cell; after receiving the second configuration, the source cell may directly send the second configuration to the terminal device, or may determine whether the sum of the first configuration and the second configuration exceeds the capability of the terminal device; after receiving the second configuration, the terminal device may perform switching of the dual activation stacks according to the first configuration and the second configuration, or may also determine whether a sum of the first configuration and the second configuration exceeds the capability of the terminal device, and then perform cell switching according to a determination result.

The term "handover based on dual active stacks" is used as an example for description, but the embodiment of the present application is not limited thereto, and the embodiment of the present application may also be replaced by another term as long as the term indicates that the terminal device needs to maintain connection with multiple cells simultaneously during handover.

Having described the method for cell handover according to the embodiment of the present application in detail, an apparatus according to the embodiment of the present application will be described below with reference to fig. 10 to 15, and technical features described in the embodiment of the method are applicable to the following apparatus embodiments.

Fig. 10 is a schematic block diagram of a terminal device provided in an embodiment of the present application, where the terminal device may be any one of the terminal devices described above. The terminal device 1000 of fig. 10 comprises a processing unit 1010, wherein:

a processing unit 1010, configured to perform a first operation according to the first information, where the first operation is used for cell handover, and the cell handover includes handover based on dual active stacks and handover based on non-dual active stacks.

Optionally, the processing unit 1010 is configured to: and determining the switching type according to the first information.

Optionally, the first information is used to indicate a handover type, and/or the first information is used to indicate to adjust a first configuration, where the first configuration is a configuration of the terminal device in the source cell.

Optionally, the processing unit 110 is configured to: and determining that the switching type is switching based on dual active stacks when the first information indicates that the switching type is switching based on dual active stacks and/or when the first information indicates that the first configuration is reduced.

Optionally, the processing unit 1010 is configured to: and in the case that the first information indicates that the handover type is handover based on a dual active stack, and/or in the case that the first information indicates that the terminal device reduces the first configuration, reducing the first configuration.

Optionally, the terminal device further includes a communication unit 1020 configured to: and sending second information to the source cell, wherein the second information is used for indicating that the first configuration is finished being reduced.

Optionally, the second information is carried in a measurement report.

Optionally, the first information is carried in a measurement configuration message, or the first information is carried in a radio resource control, RRC, reconfiguration message.

Optionally, the first information includes a capability of the terminal device, a first configuration and a second configuration, the first configuration is a configuration of the terminal device in a source cell, the second configuration is a configuration of the terminal device in a target cell, and the processing unit 1010 is configured to: according to the capability of the terminal equipment, the first configuration and the second configuration, executing a first operation, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting the first configuration, adjusting the second configuration.

Optionally, the processing unit 1010 is configured to: determining a handover type as a dual active stack based handover or a non-dual active stack based handover in case the sum of the first configuration and the second configuration does not exceed the capability of the terminal device, and/or performing at least one of the following operations in case the sum of the first configuration and the second configuration exceeds the capability of the terminal device: determining a handover type as a non-dual active stack based handover, lowering the first configuration, lowering the second configuration.

Optionally, the second configuration is carried in a handover command sent by the source cell, and the handover command is further used to indicate a handover type.

Optionally, the first information includes a capability of the terminal device, a second configuration and a third configuration, the second configuration is a configuration of the terminal device in the target cell, the third configuration is a configuration of the terminal device in the source cell after the target cell is adjusted, and the processing unit 1010 is configured to: according to the capability of the terminal equipment, the second configuration and the third configuration, executing a first operation, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting the second configuration, adjusting the third configuration.

Optionally, the processing unit 1010 is configured to: determining a handover type as a dual active stack based handover or a non-dual active stack based handover in case the sum of the second configuration and the third configuration does not exceed the capability of the terminal device, and/or performing at least one of the following operations in case the sum of the second configuration and the third configuration exceeds the capability of the terminal device: determining a handover type as a non-dual active stack based handover, lowering the second configuration, and lowering the third configuration.

Optionally, the second configuration and the third configuration are carried in a handover command sent by a source cell, and the handover command is further used to indicate a handover type.

Optionally, the handover types include a handover based on a dual active stack and a handover based on a non-dual active stack.

Optionally, the adjusting the first configuration comprises at least one of: deleting the secondary cells in the dual connectivity, and deactivating or releasing the secondary carriers in the carrier aggregation; and/or, adjusting the second configuration comprises at least one of: deleting the secondary cells in the dual connectivity, and deactivating or releasing the secondary carriers in the carrier aggregation; and/or, adjusting the third configuration comprises at least one of: deleting the secondary cell in the dual connectivity, and deactivating or releasing the secondary carrier in the carrier aggregation.

Fig. 11 is a schematic block diagram of a network device provided in an embodiment of the present application, where the network device may be the source cell described above. The network device 1100 of fig. 11 comprises a processing unit 1110, wherein:

a processing unit 1110, configured to perform a first operation based on first information, where the first operation is used for cell handover, and the cell handover includes handover based on a dual active stack and handover based on a non-dual active stack.

Optionally, the first information includes a first configuration and a capability of the terminal device, where the first configuration is a configuration of the terminal device under the source cell, and the processing unit 1110 is configured to: and determining a switching type according to the first configuration and the capability of the terminal equipment.

Optionally, the network device further includes a communication unit 1120, configured to: and sending a first message to the terminal equipment, wherein the first message is used for the terminal equipment to determine the switching type and/or adjust the first configuration.

Optionally, the first message is a measurement configuration message, where the measurement configuration message is used to indicate a handover type, or the first message is a radio resource control, RRC, reconfiguration message, where the RRC reconfiguration message is used to indicate to adjust the first configuration.

Optionally, the network device further includes a communication unit 1120, configured to: and receiving second information sent by the terminal equipment, wherein the second information is used for indicating that the first configuration is reduced.

Optionally, the second information is carried in a measurement report.

Optionally, the network device further includes a communication unit 1120, configured to: receiving a second message sent by a target cell, where the second message includes a second configuration, and the second configuration is a configuration of a terminal device in the target cell, where the processing unit 1110 is configured to: according to the first configuration, the second configuration and the capability of the terminal equipment, executing the first operation, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting a first configuration, determining whether to send a handover command to the terminal device.

Optionally, the processing unit 1110 is configured to: determining that a handover type is a handover based on a dual active stack or determining that a handover type is a handover based on a non-dual active stack if a sum of the first configuration and the second configuration does not exceed a capability of the terminal device, and/or not sending a handover command to the terminal device or reducing the first configuration or determining that a handover type is a handover based on a non-dual active stack if a sum of the first configuration and the second configuration exceeds a capability of the terminal device.

Optionally, the network device further includes a communication unit 1120, configured to: receiving a third message sent by a target cell, where the third message includes a second configuration and a third configuration, the second configuration is a configuration of a terminal device in the target cell, and the third configuration is a configuration of the terminal device in the source cell after the target cell is adjusted, where the processing unit 1110 is configured to: according to the second configuration, the third configuration and the capability of the terminal equipment, executing the first operation, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting a third configuration, and determining whether to send a handover command to the terminal device.

Optionally, the processing unit 1110 is configured to: determining that the switching type is switching based on a dual-active stack or determining that the switching type is switching based on a non-dual-active stack under the condition that the sum of the second configuration and the third configuration does not exceed the capability of the terminal equipment, and/or not sending a switching command to the terminal equipment or reducing the third configuration or determining that the switching type is switching based on a non-dual-active stack under the condition that the sum of the second configuration and the third configuration exceeds the capability of the terminal equipment.

Optionally, the second message and/or the third message is a handover command.

Optionally, the network device further includes a communication unit 1120, configured to: and sending a switching request message to the target cell, wherein the switching request message comprises the capability of the terminal equipment and the first configuration.

Optionally, the target cell includes at least one candidate target cell, and the network device further includes a communication unit 1120 configured to: selecting a candidate target cell for handover according to the second configuration sent by the at least one candidate target cell.

Fig. 12 is a schematic block diagram of another network device provided in an embodiment of the present application, where the network device may be the target cell described above. The network device 1200 of fig. 12 comprises a processing unit 1210, wherein:

a processing unit 1210, configured to perform a first operation according to the first information, where the first operation is used for cell handover, and the cell handover includes handover based on dual active stacks and handover based on non-dual active stacks.

Optionally, the first information includes a capability and a first configuration of the terminal device, where the first configuration is a configuration of the terminal device under a source cell, and the processing unit 1210 is configured to: under the condition that the target cell supports dual-active-stack-based handover, according to the capability of the terminal device and the first configuration, executing a first operation, wherein the first operation comprises at least one of the following operations: determining a handover type, determining a second configuration, and determining a third configuration, where the second configuration is a configuration of the terminal device in the target cell, and the third configuration is a configuration of the terminal device in the source cell after the target cell is adjusted.

Optionally, the processing unit 1210 is configured to: and determining the second configuration according to the capability of the terminal equipment and the first configuration, so that the sum of the first configuration and the second configuration does not exceed the capability of the terminal equipment.

Optionally, the network device further includes a communication unit 1220, configured to: and sending a first message to the source cell, wherein the first message comprises the second configuration.

Optionally, the processing unit 1210 is configured to: and determining a second configuration and a third configuration according to the capability of the terminal equipment and the first configuration, so that the sum of the second configuration and the third configuration does not exceed the capability of the terminal equipment.

Optionally, the network device further includes a communication unit 1220, configured to: and sending a second message to the source cell, wherein the second message comprises the second configuration and the third configuration.

Optionally, the first message and/or the second message is a handover command.

Optionally, the network device further includes a communication unit 1220, configured to: and receiving a switching request message sent by the source cell, wherein the switching request message comprises the capability of the terminal equipment and the first configuration.

Optionally, the first information is a handover type supported by the target cell, and the processing unit 1210 is configured to: and under the condition that the target cell does not support the switching based on the double active stacks, determining that the switching type is the switching based on the non-double active stacks, or the target cell sends a switching request rejection message to the source cell.

Optionally, the network device further includes a communication unit 1220, configured to: and sending a handover command to the source cell under the condition that the target cell determines that the handover type is handover based on a non-dual active stack, wherein the handover command comprises a second configuration, and the second configuration is determined based on all capabilities of the terminal equipment.

Optionally, in some embodiments, the communication module may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on a chip. The determining means may be one or more processors.

Fig. 13 is a schematic structural diagram of a communication device 1300 according to an embodiment of the present application. The communication device 1300 shown in fig. 13 includes a processor 1310, and the processor 1310 can call and execute a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 13, the communication device 1300 may further include a memory 1320. From the memory 1320, the processor 1310 may call and execute a computer program to implement the method of the present embodiment.

The memory 1320 may be a separate device from the processor 1310, or may be integrated into the processor 1310.

Optionally, as shown in fig. 13, the communication device 1300 may further include a transceiver 1330, and the processor 1310 may control the transceiver 1330 to communicate with other devices, and specifically, may transmit information or data to other devices or receive information or data transmitted by other devices.

The transceiver 1330 may include a transmitter and a receiver, among others. The transceiver 1330 can further include one or more antennas.

Optionally, the communication device 1300 may specifically be a network device in this embodiment, and the communication device 1300 may implement a corresponding process implemented by the network device in each method in this embodiment, which is not described herein again for brevity.

Optionally, the communication device 1300 may specifically be a mobile terminal/terminal device according to this embodiment, and the communication device 1300 may implement a corresponding process implemented by the mobile terminal/terminal device in each method according to this embodiment, which is not described herein again for brevity.

Fig. 14 is a schematic configuration diagram of an apparatus according to an embodiment of the present application. The apparatus 1400 shown in fig. 14 includes a processor 1410, and the processor 1410 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 14, the apparatus 1400 may further include a memory 1420. From memory 1420, processor 1410 may invoke and execute a computer program to implement the methods of the embodiments of the present application.

The memory 1420 may be a separate device from the processor 1410, or may be integrated into the processor 1410.

Optionally, the apparatus 1400 may further comprise an input interface 1430. The processor 1410 may control the input interface 1430 to communicate with other devices or apparatuses, and in particular, may obtain information or data transmitted by other devices or apparatuses.

Optionally, the apparatus 1400 may also include an output interface 1440. The processor 1410 can control the output interface 1440 to communicate with other devices or apparatuses, and in particular, can output information or data to other devices or apparatuses.

Optionally, the apparatus may be applied to the network device in the embodiment of the present application, and the apparatus may implement the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the apparatus may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the apparatus may implement the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, and for brevity, no further description is given here.

It should be understood that the apparatuses mentioned in the embodiments of the present application may be a chip, and the chip may also be referred to as a system on chip, a system on chip or a system on chip.

Fig. 15 is a schematic block diagram of a communication system 1500 provided in an embodiment of the present application. As shown in fig. 15, the communication system 1500 includes a terminal device 1510 and a network device 1520.

The terminal device 1510 may be configured to implement corresponding functions implemented by the terminal device in the foregoing method, and the network device 1520 may be configured to implement corresponding functions implemented by the network device in the foregoing method, which is not described herein again for brevity.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), Direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing the computer program.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions enable the computer to execute corresponding processes implemented by the network device in the methods in the embodiment of the present application, which are not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiment of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. With regard to such understanding, the technical solutions of the present application may be essentially implemented or contributed to by the prior art, or may be implemented in a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for cell handover, comprising:

and the terminal equipment executes a first operation according to the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a double active stack and switching based on a non-double active stack.
The method of claim 1, wherein the terminal device performs a first operation according to the first information, and wherein the first operation comprises:

and the terminal equipment determines the switching type according to the first information.
The method according to claim 2, wherein the first information is used to indicate a handover type and/or the first information is used to indicate an adjustment of a first configuration, wherein the first configuration is a configuration of the terminal device in a source cell.
The method of claim 3, wherein the determining, by the terminal device, the handover type according to the first information comprises:

and the terminal equipment determines that the switching type is switching based on a dual-active stack under the condition that the first information indicates that the switching type is switching based on a dual-active stack and/or under the condition that the first information indicates that the first configuration is reduced.
The method of claim 4, wherein the first operation further comprises adjusting the first configuration, and wherein the terminal device performs the first operation according to the first information, comprising:

and in the case that the first information indicates that the handover type is handover based on a dual active stack, and/or in the case that the first information indicates that the terminal device reduces the first configuration, the terminal device reduces the first configuration.
The method according to any one of claims 3-5, further comprising:

and the terminal equipment sends second information to the source cell, wherein the second information is used for indicating that the first configuration is reduced.
The method of claim 6, wherein the second information is carried in a measurement report.
The method according to any of claims 2-7, wherein the first information is carried in a measurement configuration message or the first information is carried in a radio resource control, RRC, reconfiguration message.
The method of claim 1, wherein the first information comprises capabilities of the terminal device, a first configuration, and a second configuration, wherein the first configuration is a configuration of the terminal device in a source cell, wherein the second configuration is a configuration of the terminal device in a target cell,

the terminal equipment executes a first operation according to the first information, and the first operation comprises the following steps:

the terminal device executes the first operation according to the capability of the terminal device, the first configuration and the second configuration, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting the first configuration, adjusting the second configuration.
The method of claim 9, wherein the terminal device performs the first operation according to the capability of the terminal device, the first configuration and the second configuration, and comprises:

in the case that the sum of the first configuration and the second configuration does not exceed the capability of the terminal device, the terminal device determines the handover type as a dual active stack based handover or a non-dual active stack based handover, and/or,

in case the sum of the first configuration and the second configuration exceeds the capabilities of the terminal device, the terminal device performs at least one of the following operations: determining a handover type as a non-dual active stack based handover, lowering the first configuration, lowering the second configuration.
The method according to claim 9 or 10, wherein the second configuration is carried in a handover command sent by a source cell, and wherein the handover command is further used for indicating a handover type.
The method of claim 1, wherein the first information comprises a capability of the terminal device, a second configuration, and a third configuration, wherein the second configuration is a configuration of the terminal device in a target cell, wherein the third configuration is a configuration of the terminal device in a source cell after adjustment in the target cell,

the terminal equipment executes a first operation according to the first information, and the first operation comprises the following steps:

the terminal device executes the first operation according to the capability of the terminal device, the second configuration and the third configuration, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting the second configuration, adjusting the third configuration.
The method of claim 12, wherein the terminal device performs the first operation according to the capability of the terminal device, the second configuration and the third configuration, and comprises:

in the case that the sum of the second configuration and the third configuration does not exceed the capability of the terminal device, the terminal device determines the handover type as a handover based on a dual active stack or a handover based on a non-dual active stack, and/or,

in case the sum of the second configuration and the third configuration exceeds the capability of the terminal device, the terminal device performs at least one of the following operations: determining a handover type as a non-dual active stack based handover, lowering the second configuration, and lowering the third configuration.
The method according to claim 12 or 13, wherein the second configuration and the third configuration are carried in a handover command sent by a source cell, and wherein the handover command is further used for indicating a handover type.
The method of any of claims 2-14, wherein the adjusting the first configuration comprises at least one of: deleting the secondary cells in the dual connectivity, and deactivating or releasing the secondary carriers in the carrier aggregation; and/or the presence of a gas in the gas,

adjusting the second configuration includes at least one of: deleting the secondary cells in the dual connectivity, and deactivating or releasing the secondary carriers in the carrier aggregation; and/or the presence of a gas in the gas,

adjusting the third configuration includes at least one of: deleting the secondary cell in the dual connectivity, and deactivating or releasing the secondary carrier in the carrier aggregation.
A method for cell handover, comprising:

and the source cell executes a first operation based on the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a dual active stack and switching based on a non-dual active stack.
The method of claim 16, wherein the first information comprises a first configuration and a capability of a terminal device, wherein the first configuration is a configuration of the terminal device under the source cell, and wherein the source cell performs a first operation based on the first information, comprising:

and the source cell determines a switching type according to the first configuration and the capability of the terminal equipment.
The method of claim 17, further comprising:

and the source cell sends a first message to the terminal equipment, wherein the first message is used for the terminal equipment to determine the switching type and/or adjust the first configuration.
The method of claim 18, wherein the first message is a measurement configuration message indicating a handover type, or,

the first message is a radio resource control, RRC, reconfiguration message, where the RRC reconfiguration message is used to indicate to adjust the first configuration.
The method of claim 19, further comprising:

and the source cell receives second information sent by the terminal equipment, wherein the second information is used for indicating that the reduction of the first configuration is completed.
The method of claim 20, wherein the second information is carried in a measurement report.
The method of claim 16, further comprising:

the source cell receives a second message sent by a target cell, wherein the second message comprises a second configuration, and the second configuration is the configuration of the terminal equipment under the target cell,

the source cell performs a first operation based on the first information, including:

the source cell executes the first operation according to the first configuration, the second configuration and the capability of the terminal equipment, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting a first configuration, determining whether to send a handover command to the terminal device.
The method of claim 22, wherein the source cell performs the first operation according to the first configuration, the second configuration and the capability of the terminal device, and comprises:

in case that the sum of the first configuration and the second configuration does not exceed the capability of the terminal device, the source cell determines the handover type to be a handover based on a dual active stack, or determines the handover type to be a handover based on a non-dual active stack, and/or,

and under the condition that the sum of the first configuration and the second configuration exceeds the capability of the terminal equipment, the source cell does not send a switching command to the terminal equipment, or reduces the first configuration, or determines the switching type to be switching based on a non-dual active stack.
The method of claim 16, further comprising:

the source cell receives a third message sent by a target cell, the third message including a second configuration and a third configuration, the second configuration being a configuration of the terminal device in the target cell, the third configuration being a configuration of the terminal device in the source cell after the target cell is adjusted,

the source cell performs a first operation based on the first information, including:

the source cell executes the first operation according to the second configuration, the third configuration and the capability of the terminal equipment, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting a third configuration, and determining whether to send a handover command to the terminal device.
The method of claim 24, wherein the source cell performs the first operation according to the second configuration, the third configuration and a capability of a terminal device, and comprises:

in case that the sum of the second configuration and the third configuration does not exceed the capability of the terminal device, the source cell determines the handover type to be a handover based on a dual active stack, or determines the handover type to be a handover based on a non-dual active stack, and/or,

and under the condition that the sum of the second configuration and the third configuration exceeds the capability of the terminal equipment, the source cell does not send a switching command to the terminal equipment, or reduces the third configuration, or determines the switching type to be switching based on a non-dual active stack.
Method according to any of claims 22-25, wherein the second message and/or the third message is a handover command.
The method according to any one of claims 22-26, further comprising:

and the source cell sends a switching request message to the target cell, wherein the switching request message comprises the capability of the terminal equipment and the first configuration.
The method of claim 27, wherein the target cell comprises at least one candidate target cell, and wherein the method further comprises:

and the source cell selects a candidate target cell for switching according to the second configuration sent by the at least one candidate target cell.
A method for cell handover, comprising:

and the target cell executes a first operation according to the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a dual-activation stack and switching based on a non-dual-activation stack.
The method of claim 29, wherein the first information comprises a capability of a terminal device and a first configuration, the first configuration is a configuration of the terminal device under a source cell, and the target cell performs a first operation according to the first information, comprising:

under the condition that the target cell supports dual-active stack switching, the target cell executes the first operation according to the capability of the terminal equipment and the first configuration, wherein the first operation comprises at least one of the following operations: determining a handover type, determining a second configuration, and determining a third configuration, where the second configuration is a configuration of the terminal device in the target cell, and the third configuration is a configuration of the terminal device in the source cell after the target cell is adjusted.
The method of claim 30, wherein the target cell performs the first operation according to the capability of the terminal device and the first configuration, and wherein the first operation comprises:

and the target cell determines the second configuration according to the capability of the terminal equipment and the first configuration, so that the sum of the first configuration and the second configuration does not exceed the capability of the terminal equipment.
The method of claim 31, further comprising:

and the target cell sends a first message to the source cell, wherein the first message comprises the second configuration.
The method of claim 30, wherein the target cell performs the first operation according to the capability of the terminal device and the first configuration, and wherein the first operation comprises:

and the target cell determines the second configuration and the third configuration according to the capability of the terminal equipment and the first configuration, so that the sum of the second configuration and the third configuration does not exceed the capability of the terminal equipment.
The method of claim 33, further comprising:

and the target cell sends a second message to the source cell, wherein the second message comprises the second configuration and the third configuration.
Method according to claim 32 or 34, wherein the first message and/or the second message is a handover command.
The method according to any one of claims 30-35, further comprising:

and the target cell receives a switching request message sent by the source cell, wherein the switching request message comprises the capability of the terminal equipment and the first configuration.
The method of claim 36, wherein the handover request message is used to indicate that the handover type is a dual active stack based handover.
The method of claim 29, wherein the first information is a handover type supported by the target cell,

the target cell executes a first operation according to the first information, including:

and under the condition that the target cell does not support the switching based on the double active stacks, the target cell determines that the switching type is the switching based on the non-double active stacks, or sends a switching request rejection message to the source cell.
The method of claim 38, further comprising:

and under the condition that the target cell determines that the switching type is switching based on a non-dual active stack, the target cell sends a switching command to the source cell, wherein the switching command comprises a second configuration, and the second configuration is determined based on all capabilities of the terminal equipment.
A terminal device, comprising:

and the processing unit is used for executing a first operation according to the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a dual-active stack and switching based on a non-dual-active stack.
The terminal device of claim 40, wherein the processing unit is configured to:

and determining the switching type according to the first information.
The terminal device according to claim 41, wherein the first information is used to indicate a handover type, and/or wherein the first information is used to indicate an adjustment of a first configuration, the first configuration being a configuration of the terminal device under a source cell.
The terminal device of claim 42, wherein the processing unit is configured to:

and determining that the switching type is switching based on dual active stacks when the first information indicates that the switching type is switching based on dual active stacks and/or when the first information indicates that the first configuration is reduced.
The terminal device of claim 43, wherein the processing unit is configured to:

and in the case that the first information indicates that the handover type is handover based on a dual active stack, and/or in the case that the first information indicates that the terminal device reduces the first configuration, reducing the first configuration.
The terminal device according to any of claims 42-44, wherein the terminal device further comprises a communication unit configured to:

and sending second information to the source cell, wherein the second information is used for indicating that the first configuration is finished being reduced.
The terminal device of claim 45, wherein the second information is carried in a measurement report.
The terminal device of any of claims 41-46, wherein the first information is carried in a measurement configuration message or the first information is carried in a radio resource control, RRC, reconfiguration message.
The terminal device of claim 40, wherein the first information comprises a capability of the terminal device, a first configuration and a second configuration, the first configuration being a configuration of the terminal device under a source cell, the second configuration being a configuration of the terminal device under a target cell,

the processing unit is configured to:

according to the capability of the terminal equipment, the first configuration and the second configuration, executing the first operation, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting the first configuration, adjusting the second configuration.
The terminal device of claim 48, wherein the processing unit is configured to:

determining a handover type as a dual active stack based handover or a non-dual active stack based handover in case the sum of the first configuration and the second configuration does not exceed the capability of the terminal device, and/or,

in case the sum of the first configuration and the second configuration exceeds the capability of the terminal device, performing at least one of the following operations: determining a handover type as a non-dual active stack based handover, lowering the first configuration, lowering the second configuration.
The terminal device according to claim 48 or 49, wherein the second configuration is carried in a handover command sent by a source cell, and wherein the handover command is further used to indicate a handover type.
The terminal device of claim 40, wherein the first information comprises a capability of the terminal device, a second configuration and a third configuration, the second configuration is a configuration of the terminal device under a target cell, the third configuration is a configuration of the terminal device under a source cell after target cell adjustment,

the processing unit is configured to:

according to the capability of the terminal equipment, the second configuration and the third configuration, executing the first operation, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting the second configuration, adjusting the third configuration.
The terminal device of claim 51, wherein the processing unit is configured to:

determining a handover type as a dual active stack based handover or a non-dual active stack based handover in case the sum of the second configuration and the third configuration does not exceed the capability of the terminal device, and/or,

in case the sum of the second configuration and the third configuration exceeds the capability of the terminal device, performing at least one of the following operations: determining a handover type as a non-dual active stack based handover, lowering the second configuration, and lowering the third configuration.
The terminal device according to claim 51 or 52, wherein the second configuration and the third configuration are carried in a handover command sent by a source cell, and wherein the handover command is further used for indicating a handover type.
The terminal device of any one of claims 41-53, wherein the adjusting the first configuration comprises at least one of: deleting the secondary cells in the dual connectivity, and deactivating or releasing the secondary carriers in the carrier aggregation; and/or the presence of a gas in the gas,

adjusting the second configuration includes at least one of: deleting the secondary cells in the dual connectivity, and deactivating or releasing the secondary carriers in the carrier aggregation; and/or the presence of a gas in the gas,

adjusting the third configuration includes at least one of: deleting the secondary cell in the dual connectivity, and deactivating or releasing the secondary carrier in the carrier aggregation.
A network device, wherein the network device is a source cell, comprising:

and the processing unit is used for executing a first operation based on the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a dual-active stack and switching based on a non-dual-active stack.
The network device of claim 55, wherein the first information comprises a first configuration and a capability of a terminal device, wherein the first configuration is a configuration of the terminal device under the source cell, and wherein the processing unit is configured to:

and determining a switching type according to the first configuration and the capability of the terminal equipment.
The network device of claim 56, further comprising a communication unit configured to:

and sending a first message to the terminal equipment, wherein the first message is used for the terminal equipment to determine the switching type and/or adjust the first configuration.
The network device of claim 57, wherein the first message is a measurement configuration message indicating a handover type, or,

the first message is a radio resource control, RRC, reconfiguration message, where the RRC reconfiguration message is used to indicate to adjust the first configuration.
The network device of claim 58, further comprising a communication unit configured to:

and receiving second information sent by the terminal equipment, wherein the second information is used for indicating that the first configuration is reduced.
The network device of claim 59, wherein the second information is carried in a measurement report.
The network device of claim 55, wherein the network device further comprises a communication unit configured to:

receiving a second message sent by a target cell, wherein the second message comprises a second configuration, and the second configuration is a configuration of a terminal device in the target cell,

the processing unit is configured to:

according to the first configuration, the second configuration and the capability of the terminal equipment, executing the first operation, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting a first configuration, determining whether to send a handover command to the terminal device.
The network device of claim 61, wherein the processing unit is configured to:

determining a handover type as a handover based on a dual active stack or determining a handover type as a handover based on a non-dual active stack, and/or,

and under the condition that the sum of the first configuration and the second configuration exceeds the capability of the terminal equipment, not sending a switching command to the terminal equipment, or reducing the first configuration, or determining the switching type to be switching based on a non-dual active stack.
The network device of claim 55, wherein the network device further comprises a communication unit configured to:

receiving a third message sent by a target cell, where the third message includes a second configuration and a third configuration, the second configuration is a configuration of a terminal device in the target cell, and the third configuration is a configuration of the terminal device in the source cell after the target cell is adjusted,

the processing unit is configured to:

according to the second configuration, the third configuration and the capability of the terminal equipment, executing the first operation, wherein the first operation comprises at least one of the following operations: determining a handover type, adjusting a third configuration, and determining whether to send a handover command to the terminal device.
The network device of claim 63, wherein the processing unit is configured to:

determining a handover type as a handover based on a dual active stack or determining a handover type as a handover based on a non-dual active stack, and/or,

and under the condition that the sum of the second configuration and the third configuration exceeds the capability of the terminal equipment, not sending a switching command to the terminal equipment, or reducing the third configuration, or determining the switching type to be switching based on a non-dual active stack.
Network device according to any of claims 61-64, wherein the second message and/or the third message is a handover command.
The network device of any one of claims 61-65, wherein the network device further comprises a communication unit configured to:

and sending a switching request message to the target cell, wherein the switching request message comprises the capability of the terminal equipment and the first configuration.
The network device of claim 66, wherein the target cell comprises at least one candidate target cell, and wherein the network device further comprises a communication unit configured to:

selecting a candidate target cell for handover according to the second configuration sent by the at least one candidate target cell.
A network device, wherein the network device is a target cell, comprising:

and the processing unit is used for executing a first operation according to the first information, wherein the first operation is used for cell switching, and the cell switching comprises switching based on a dual-active stack and switching based on a non-dual-active stack.
The network device of claim 68, wherein the first information comprises a capability of a terminal device and a first configuration, the first configuration is a configuration of the terminal device under a source cell, and the processing unit is configured to:

under the condition that the target cell supports dual-active stack switching, executing the first operation according to the capability of the terminal equipment and the first configuration, wherein the first operation comprises at least one of the following operations: determining a handover type, determining a second configuration, and determining a third configuration, where the second configuration is a configuration of the terminal device in the target cell, and the third configuration is a configuration of the terminal device in the source cell after the target cell is adjusted.
The network device of claim 69, wherein the processing unit is configured to:

and determining the second configuration according to the capability of the terminal equipment and the first configuration, so that the sum of the first configuration and the second configuration does not exceed the capability of the terminal equipment.
The network device of claim 70, wherein the network device further comprises a communication unit configured to:

and sending a first message to the source cell, wherein the first message comprises the second configuration.
The network device of claim 69, wherein the processing unit is configured to:

and determining the second configuration and the third configuration according to the capability of the terminal equipment and the first configuration, so that the sum of the second configuration and the third configuration does not exceed the capability of the terminal equipment.
The network device of claim 72, wherein the network device further comprises a communication unit configured to:

and sending a second message to the source cell, wherein the second message comprises the second configuration and the third configuration.
Network device according to claim 71 or 73, wherein the first message and/or the second message is a handover command.
The network device according to any of claims 69-74, wherein the network device further comprises a communication unit configured to:

and receiving a switching request message sent by the source cell, wherein the switching request message comprises the capability of the terminal equipment and the first configuration.
The network device of claim 75, wherein the handover request message indicates the handover type is a dual active stack based handover.
The network device of claim 68, wherein the first information is a handover type supported by the target cell,

the processing unit is configured to:

and under the condition that the target cell does not support the switching based on the double active stacks, determining the switching type to be the switching based on the non-double active stacks, or sending a switching request rejection message to the source cell.
The network device of claim 77, further comprising a communication unit to:

and sending a handover command to the source cell under the condition that the target cell determines that the handover type is handover based on a non-dual active stack, wherein the handover command comprises a second configuration, and the second configuration is determined based on all capabilities of the terminal equipment.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 1 to 15.
A network device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 16 to 28.
A network device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 29 to 39.
An apparatus, comprising: a processor for calling and running a computer program from a memory to cause a device in which the apparatus is installed to perform the method of any one of claims 1 to 15.
An apparatus, comprising: a processor for invoking and running a computer program from a memory, causing an apparatus in which the apparatus is installed to perform the method of any of claims 16-28.
An apparatus, comprising: a processor for invoking and running a computer program from a memory, causing an apparatus having the apparatus installed therein to perform the method of any of claims 29-39.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 15.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 16 to 28.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 29 to 39.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 15.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 16 to 28.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 29 to 39.
A computer program, characterized in that the computer program causes a computer to perform the method according to any of claims 1-15.
A computer program, characterized in that the computer program causes a computer to perform the method according to any of claims 16 to 28.
A computer program, characterized in that the computer program causes a computer to perform the method according to any of claims 29 to 39.
A communication system comprising a terminal device according to any of claims 40 to 54.
A communication system comprising a network device according to any of claims 55 to 67.
A communication system comprising a network device according to any one of claims 68 to 78.