CN110741681B

CN110741681B - Method for establishing connection, network equipment and terminal equipment

Info

Publication number: CN110741681B
Application number: CN201880037558.3A
Authority: CN
Inventors: 许阳; 刘建华
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-12-06
Filing date: 2018-12-06
Publication date: 2022-02-08
Anticipated expiration: 2038-12-06
Also published as: CN110741681A; WO2020113520A1

Abstract

The embodiment of the application relates to a method for establishing connection, network equipment and terminal equipment. The method includes that a first network device sends indication information to a target device under the condition that the first network device executes a first process, the indication information is used for indicating the target device to connect a terminal device to a third network device through a second process according to preset conditions, wherein the target device is the terminal device or a second network device, and the first process comprises the following steps: the terminal device connected to the first network device is connected to the second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device. The method for establishing the connection, the network equipment and the terminal equipment can improve user experience.

Description

Method for establishing connection, network equipment and terminal equipment

Technical Field

The present application relates to the field of communications, and in particular, to a method, a network device, and a terminal device for establishing a connection.

Background

At the initial stage of 5G deployment, a network may not be able to support a New air interface Voice bearer (Voice over New Radio, VoNR), or in the case of network congestion, the 5G network needs to trigger a 5G- >4G fallback (Handover) procedure, so that the 4G network executes a Long-Term Evolution Voice bearer (Voice over Long-Term Evolution, VoLTE), thereby completing a request for establishing a Voice by a User Equipment (UE). For the 5G- >4G Handover procedure, two general approaches are involved: one is a core network of 5G is unchanged, when UE needs to execute voice, Radio Access Technologies (RAT) falls back, RAT Access changes from New Radio (NR) to Long Term Evolution (LTE), and then VoLTE operation is executed; the other is that the 5G core network is switched to the 4G core network, meanwhile, the RAT is changed from NR to LTE, and then VoLTE operation is carried out.

However, after the VoLTE voice is completed, for the UE performing 5G- >4G fallback specifically for establishing voice, there is no mechanism that can trigger it to perform fast return to the 5G network.

Disclosure of Invention

The embodiment of the application provides a method for establishing connection, network equipment and terminal equipment, and user experience can be improved.

In a first aspect, a method for establishing a connection is provided, including: the method comprises the steps that a first network device sends indication information to a target device under the condition that the first network device executes a first process, the indication information is used for indicating the target device to connect a terminal device to a third network device through a second process according to preset conditions, the target device is the terminal device or a second network device, and the first process comprises the following steps: the terminal device connected to the first network device is connected to the second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device.

In a second aspect, a method for establishing a connection is provided, including: the second network equipment receives the indication information sent by the first network equipment under the condition of executing the first process; the second network device connects the terminal device to a third network device through a second process according to the indication information and preset conditions, wherein the first process comprises the following steps: the terminal device connected to the first network device is connected to the second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device.

In a third aspect, a method for establishing a connection is provided, including: the method comprises the steps that under the condition that a terminal device executes a first process, indication information sent by first network equipment is received; the terminal device is connected to a third network device through a second process according to the indication information and preset conditions, wherein the first process comprises the following steps: the terminal device connected to the first network device is connected to a second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device.

In a fourth aspect, a network device is provided for performing the method in any one of the first to second aspects or implementations 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 terminal device is provided, configured to perform the method in the third aspect or each implementation manner thereof. In particular, the network device comprises functional modules for performing the method of the third aspect or its implementations.

In a sixth 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 any one of the first aspect to the second aspect or each implementation manner thereof.

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 third aspect or each implementation manner thereof.

In an eighth aspect, a chip is provided for implementing the method in any one of the first to third aspects or implementations thereof. Specifically, the chip includes: a processor configured to call and run the computer program from the memory, so that the device on which the chip is installed performs the method in any one of the first aspect to the second aspect or the implementation manners thereof.

In a ninth aspect, a computer readable storage medium is provided for storing a computer program, the computer program causing a computer to perform the method of any one of the first to third aspects or implementations thereof.

A tenth aspect provides a computer program product comprising computer program instructions to cause a computer to perform the method of any of the first to third aspects above or implementations thereof.

In an eleventh 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 first to third aspects or implementations thereof.

Through the technical scheme, in the process that the terminal equipment connected with the first network equipment is connected to the second network equipment through redirection or switching, the first network equipment can send indication information to the second network equipment or the terminal equipment, so that the terminal equipment can be connected to the third network equipment from the second network equipment according to preset conditions, the problem that the terminal equipment of 5G immediately returns to the 5G network after completing a specific service under the condition that the terminal equipment of 5G falls back to 4G to execute the specific service can be solved, a user can use the 5G network to the maximum extent, and user experience is guaranteed.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of a method for establishing a connection according to an embodiment of the present disclosure.

Fig. 3 is another schematic flow chart of a method for establishing a connection according to an embodiment of the present application.

Fig. 4 is a further schematic flow chart of a method for establishing a connection according to an embodiment of the present application.

Fig. 5 is a schematic block diagram of a network device according to an embodiment of the present application.

Fig. 6 is another schematic block diagram of a network device according to an embodiment of the present application.

Fig. 7 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 8 is a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 9 is a schematic block diagram of a chip provided in an embodiment of the present application.

Fig. 10 is a schematic diagram of a communication system provided in an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: 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, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.

Illustratively, a communication system 100 applied in the embodiment of the present application is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Illustratively, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or a Network device in a Mobile switching center, a relay, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, 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.

Illustratively, direct-to-Device (D2D) communication between terminal devices 120 is possible.

Illustratively, a 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Fig. 1 exemplarily shows one network device and two terminal devices, and the communication system 100 may exemplarily include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

The communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above and are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Fig. 2 is a schematic flow chart of a method 200 for establishing a connection according to an embodiment of the present application, where the method 200 may be performed by a network device, and for convenience of description, the network device is referred to as a first network device, and the first network device may be the network device shown in fig. 1. As shown in fig. 2, the method 200 includes: s210, when the first network device executes the first process, sending, by the first network device, indication information to a target device, where the indication information is used to indicate the target device to connect the terminal device to a third network device through a second process according to a preset condition, where the target device is the terminal device or the second network device.

It should be understood that this first process includes: the terminal device connected to the first network device is connected to the second network device. Specifically, in the first process, the terminal device connected to the first network device may be changed to connect to the second network device by way of redirection or handover. Wherein, the redirection mode may include: the terminal equipment returns to an idle state by releasing the connection with the first network equipment, and is connected with the second network equipment by a reselection mechanism. The switching mode may include: the terminal device switches from a first network device to a second network device while maintaining Radio Resource Control (RRC) connection with the first network device.

Similarly, the second process includes: the terminal device connected to the second network device is connected to the third network device. Specifically, in the second process, the terminal device connected to the second network device may be changed to connect to the third network device by way of redirection or handover. Wherein, the redirection mode may include: the terminal equipment returns to an idle state by releasing the connection with the second network equipment, and is connected with the third network equipment by a reselection mechanism. The switching mode may include: and under the condition that the terminal equipment keeps RRC connection with the first network equipment, switching from the second network equipment to the third network equipment.

In this embodiment, the first network device, the second network device, and the third network device may be any network devices, where for any two of the network devices, at least one of the following conditions may be satisfied: corresponding to the same or different core network types, corresponding to the same or different PLMNs, corresponding to the same or different network slices and corresponding to the same or different access systems. For example, the first network device may be the same network device as the third network device, and the second network device may be a different network device, where the first network device and the second network device correspond to different core networks. For another example, the first network device and the third network device may correspond to the same access mechanism, and the first network device and the second network device belong to different access mechanisms, where the access mechanism of the first network device and the second network device is NR, and the access mechanism of the second network device is LTE. As another example, the three network devices may all correspond to the same network slice. The embodiments of the present application are not limited thereto.

In this embodiment of the application, when the first network device and the terminal device execute the first process, the first network device may send instruction information to the target device, where the instruction information is used to instruct the target device to connect the terminal device to the third network device through the second process according to a preset condition. Specifically, the indication information may include the preset condition, or the indication information may also include other information, for example, the other information may be information capable of determining the preset condition, and the embodiment of the present application is not limited thereto.

As an embodiment, the indication information may include an execution purpose of the first network device to execute the first procedure. Specifically, the execution purpose may be: the terminal device executes a first specific service on the second network device. Wherein the first specific service may include at least one of a voice service, a video service, and an emergency call service.

As an embodiment, the target device may determine the preset condition corresponding to the execution destination in the indication information according to a corresponding relationship between the execution destination and the preset condition. For example, assuming that the execution purpose is that the terminal device executes a first specific service on the second network device, the preset condition corresponding to the execution purpose may be related to the first specific service, for example, the preset condition may include: after the terminal device executes the first specific service, the target device connects the terminal device to the third network device through the second process; alternatively, the preset condition may further include: after the terminal device finishes executing the first specific service and the terminal device needs to execute a second specific service, the target device connects the terminal device to the third network device through the second process, wherein the second specific service may include at least one of a voice service, a video service and an emergency call service.

As an embodiment, the indication information may also include a preset condition. Specifically, the target receives the indication information, and connects the terminal device to the third network device through the second process according to a preset condition therein. Wherein, the preset condition may include: and connecting the terminal device to the third network device through the second process at a preset time and/or a preset place, and connecting the terminal device to the third network device by the target device according to the preset condition when the preset time and/or the preset place are reached.

Alternatively, the preset condition may further include: and connecting the terminal device to the third network device through the second process after the terminal device finishes executing the first specific service on the second network device and/or in the case that the terminal device needs to execute a second specific service, wherein the first specific service may include at least one of a voice service, a video service and an emergency call service, and the second specific service may also include at least one of a voice service, a video service and an emergency call service.

For example, assume that the preset conditions include: after the terminal device executes the first specific service on the second network device, the terminal device is connected to the third network device through the second process, wherein the first specific service may be a voice service. And the target equipment executes the voice service on the second network equipment according to the preset condition, and when the voice service is finished, the target equipment changes the terminal equipment from the second network equipment to be connected to the third network equipment.

For another example, assume that the preset condition includes: in case that a terminal device connected with a second network device needs to perform a second specific service, the terminal device is connected to the third network device through the second procedure, and the second service may be an emergency call service. And the target equipment changes the terminal equipment from the second network equipment to be connected to third network equipment if the terminal equipment connected with the second network equipment currently needs to carry out the emergency call service according to the preset condition.

For another example, assume that the preset condition includes that the terminal device is connected to the third network device through the second process after the terminal device finishes executing the first specific service on the second network device and the terminal device needs to execute the second specific service, where the first specific service may be a voice service and the second service may be an emergency call service. When the terminal equipment connected with the second network equipment executes the voice service and the terminal equipment needs to execute the emergency call service after the voice service is finished, the target equipment changes the terminal equipment from the second network equipment to be connected with the third network equipment.

In this embodiment, the target device may be a second network device or a terminal device, which will be described below.

As an embodiment, in the case that the target device is the terminal device, that is, in the case that the first network device performs the first process with the terminal device, the first network device sends the indication information to the terminal device, so that the terminal device is connected to the third network device through the second process according to the preset condition according to the indication information. Specifically, the sending, by the first network device, the indication information to the terminal device may include: the first network device directly or indirectly sends the indication information to the terminal device.

As an embodiment, for a first network device directly sending indication information to a terminal device, for example, it is assumed that a first procedure is: the terminal device connected to the first network device is changed to be connected to the second network device in a redirection manner, and then the first network device may send an RRC connection release message to the terminal device, so that the terminal device disconnects the RRC connection with the first network device according to the RRC connection release message and returns to an idle state, where the RRC connection release message may include the indication information in the embodiment of the present application. For another example, assume that the first process is: the terminal device connected to the first network device is changed to be connected to the second network device through a switching manner, and then the first network device may send a switching request message to the terminal device, so that the terminal device switches from the first network device to the second network device according to the switching request message, where the switching request message may also include the indication information in the embodiment of the present application.

As an embodiment, the indication information is sent to the terminal device indirectly for the first network device, that is, the first network device forwards the indication information to the terminal device through other devices, for example, the first network device sends the indication information to the second network device, so that the second network device forwards the indication information to the terminal device. Specifically, the sending, by the first network device, the indication information to the second network device may include: the first network device sends the indication information to the second network device through the direct connection interface or through the core network device. For example, the first network device sends the indication information to the second network device through the Xn interface; for another example, the first network device transmits the indication information to the second network device through the core network device via the N2 interface.

The second network equipment receives the indication information and sends the indication information to the terminal equipment. Specifically, for convenience of description, it is assumed that the second network device receives the indication information sent by the first network device as first indication information, and the second network device sends the second indication information to the terminal device, where the first indication information may be the same as the second indication information, that is, the second network device may directly send the received indication information to the terminal device; or, the second indication information may also be determined by the second network device according to the first indication information, where both the first indication information and the second indication information are used to indicate that the terminal device is connected to the third network device through the second process according to the preset condition.

In this embodiment, the target device is a terminal device, that is, the terminal device receives the indication information sent by the first network device, and according to a preset condition, the terminal device is connected to the third network device through the second process. Specifically, the terminal device is changed from the first network device to the second network device through the first process, and according to the indication information, the terminal device needs to be connected to the third network device through the second process under the preset condition. Wherein the second process comprises: the terminal device is connected to the third network device in a redirection mode, that is, the terminal device and the second network device return to an idle state by releasing connection, and then are connected to the third network device by a reselection mechanism.

As another embodiment, the target device may also be a second network device, that is, the first network device sends indication information to the second network device when executing the first process, so that the second network device connects the terminal device to the third network device through the second process according to the indication information and according to the preset condition. Specifically, the sending, by the first network device, the indication information to the second network device may include: the first network device sends the indication information directly or indirectly to the second network device.

As an embodiment, for a first network device directly sending the indication information to a second network device, the first network device may send the indication information to the second network device through a direct interface. For example, assuming that the terminal device switches from the first network device to the second network device by means of switching, the first network device may directly send the indication information to the second network device through the Xn interface.

As an embodiment, the indication information is sent to the second network device indirectly for the first network device, that is, the first network device forwards the indication information to the terminal device through other devices. As an embodiment, the first network device may send the indication information to the second network device through the core network device, for example, the first network device passes through the core network device to the second network device through the N2 interface.

Alternatively, the first network device may send the indication information to the second network device through the terminal device. For example, assume that the first process is: a terminal device connected to a first network device is changed to be connected to a second network device in a redirection manner, and then the first network device may send an RRC connection release message to the terminal device, so that the terminal device disconnects the RRC connection with the first network device according to the RRC connection release message and returns to an idle state, where the RRC connection release message may include indication information in this embodiment; after the terminal device returns to the idle state, the terminal device may be connected to the second network device through a reselection mechanism, and then the terminal device may send an RRC Connection Establishment request message (RRC Connection Establishment request) to the second network device to request Establishment of an RRC Connection with the second network device, where the RRC Connection Establishment request message may include indication information sent by the first network device, or the RRC Connection Establishment request message may include another indication information determined by the terminal device according to the indication information sent by the first network device, so that the second network device receives the indication information, and connects the terminal device to the third network device through the second process according to a preset condition.

For another example, assume that the first process is: a terminal device connected to a first network device is changed to be connected to a second network device through a switching manner, and then the first network device may send a switching request message to the terminal device, so that the terminal device switches from the first network device to the second network device according to the switching request message, where the switching request message may also include indication information in this embodiment; then, when the terminal device completes the Handover procedure, a Handover Complete message (Handover Complete) is sent to the second network device, where the Handover Complete message may include indication information sent by the first network device, or the Handover Complete message may also include another indication information determined by the terminal device according to the indication information sent by the first network device, so that the second network device receives the indication information, and connects the terminal device to the third network device through the second procedure according to a preset condition.

The second network device receives the indication information, and connects the terminal device to a third network device through a second process according to a preset condition, wherein the second process is as follows: and the terminal equipment connected with the second network equipment is connected to the third network equipment in a switching mode.

For example, assume that the preset condition indicated by the indication information is: after the terminal device completes the first specific service on the second network device, the terminal device is connected to the third network device, and then the second network device does not migrate the terminal device according to the preset condition before the terminal device executes the first specific service and switches the terminal device to the third network device after the first specific service is finished.

For example, the first specific service executed by the terminal device is a voice service, and the second network device belongs to an LTE network, so that the second network device may return to the 5G network and connect to a third network device of the 5G network after the terminal device finishes the voice service.

Therefore, in the method for establishing a connection according to the embodiment of the present application, in a process that a terminal device connected to a first network device is connected to a second network device through redirection or switching, the first network device may send indication information to the second network device or the terminal device, so that the terminal device may be connected to a third network device from the second network device according to a preset condition, and a problem that a 5G terminal device immediately returns to a 5G network after completing a specific service when the terminal device falls back to 4G to execute the specific service can be solved, so that a user can use the 5G network to the maximum extent, thereby ensuring user experience.

The method for establishing a connection according to the embodiment of the present application is described in detail above from the perspective of the first network device in conjunction with fig. 1 to 2, and the method for establishing a connection according to the embodiment of the present application is described below from the perspective of the second network device and the terminal device in conjunction with fig. 3 to 4, respectively.

Fig. 3 shows a schematic flow chart of a method 300 for establishing a connection according to an embodiment of the present application, which method 300 may be performed by a network device, for example the network device shown in fig. 1, and specifically, for convenience of distinction, the network device is referred to herein as a second network device. As shown in fig. 3, the method 300 includes: s310, the second network equipment receives the indication information sent by the first network equipment under the condition of executing the first process; the second network device connects the terminal device to a third network device through a second process according to the indication information and preset conditions, wherein the first process comprises the following steps: the terminal device connected to the first network device is connected to the second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device.

As one embodiment, the first process includes: the terminal device connected to the first network device is connected to the second network device by redirection or handover, and/or the second procedure comprises: the terminal device connected to the second network device is connected to the third network device by switching.

As an embodiment, the indication information includes an execution purpose of the first network device to execute the first procedure.

As an embodiment, the method 300 further comprises: the second network device determines the preset condition corresponding to the execution destination.

As an example, the implementation aims to: the terminal device executes a first specific service on the second network device.

As an embodiment, the indication information includes the preset condition.

As an embodiment, the preset condition includes: and the second network equipment connects the terminal equipment to the third network equipment through the second process at a preset time and/or a preset place.

As an embodiment, the preset condition includes: and connecting the terminal device to the third network device through the second process in the case that the terminal device needs to execute the second specific service after the terminal device finishes executing the first specific service on the second network device and/or the terminal device needs to execute the second specific service.

As an embodiment, the first specific service includes at least one of: voice traffic, video traffic, and emergency call traffic.

As an embodiment, in the case that the second network device performs the first procedure, receiving the indication information sent by the first network device, including: the second network device receives the indication information sent by the first network device through a direct connection interface or a core network device under the condition that the first process is executed, wherein the first process comprises: and the terminal equipment connected with the first network equipment is switched to be connected with the second network equipment.

As an embodiment, in the case that the second network device performs the first procedure, receiving the indication information sent by the first network device, including: the second network device receives the indication information sent by the terminal device when executing the first process, and the indication information is sent by the first network device when executing the first process.

As an embodiment, the receiving, by the second network device, the indication information sent by the terminal device when the first process is executed includes: and the second network equipment receives an RRC connection establishment request message or a switching completion message sent by the terminal equipment under the condition of executing the first process, wherein the RRC connection establishment request message or the switching completion message comprises the indication information.

As an embodiment, the first network device and the third network device satisfy at least one of the following conditions: corresponding to the same access system, the same PLMN, the same core network type and the same network slice.

As an embodiment, at least two of the first network device, the second network device, and the third network device satisfy at least one of the following conditions: corresponding to different core network types, corresponding to different PLMNs, corresponding to different network slices and corresponding to different access modes.

It should be understood that the first network device in the method 300 corresponds to the first network device in the method 200, the second network device in the method 300 corresponds to the second network device in the method 200, the third network device in the method 300 corresponds to the third network device in the method 200, and the terminal device in the method 300 corresponds to the terminal device in the method 200, and therefore, for brevity, no further description is provided herein.

Therefore, according to the method for establishing a connection in the embodiment of the application, in the process that the terminal device connected to the first network device is connected to the second network device through redirection or switching, the first network device may send the indication information to the second network device, so that the second network device may connect the terminal device from the second network device to the third network device according to the preset condition, and the problem that the terminal device of 5G immediately returns to the 5G network after completing the specific service under the condition that the terminal device of 5G falls back to 4G to execute the specific service can be solved, so that a user can use the 5G network to the maximum extent, and thus user experience is guaranteed.

Fig. 4 shows a schematic flow chart of a method 400 for establishing a connection according to an embodiment of the application, which method 400 may be performed by a terminal device, for example any one of the terminal devices as shown in fig. 1. As shown in fig. 4, the method 400 includes: s410, the terminal equipment receives indication information sent by first network equipment under the condition of executing a first process; the terminal device is connected to a third network device through a second process according to the indication information and preset conditions, wherein the first process comprises the following steps: the terminal device connected to the first network device is connected to a second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device.

As one embodiment, the first process includes: the terminal device connected to the first network device is connected to the second network device by redirection or handover, and/or the second procedure comprises: the terminal device connected to the second network device is connected to the third network device by redirection.

As an embodiment, the method 400 further comprises: the terminal device determines the preset condition corresponding to the execution purpose.

As an embodiment, the indication information includes the preset condition.

As an embodiment, the preset condition includes: the terminal device is connected to the third network device through the second process at a preset time and/or a preset place.

As an embodiment, the preset condition includes: after the terminal device finishes executing the first specific service on the second network device, and/or in case that the terminal device needs to execute the second specific service, the terminal device is connected to the third network device through the second process.

As an embodiment, the receiving, by the terminal device, the indication information sent by the first network device when the terminal device executes the first procedure includes: the terminal device receives an RRC connection release message or a handover request message sent by the first network device under the condition of executing the first procedure, where the RRC connection release message or the handover request message includes the indication information.

As an embodiment, the receiving, by the terminal device, the indication information sent by the first network device when the terminal device executes the first procedure includes: the terminal device receives the indication information sent by the second network device when executing the first process, where the indication information is sent by the first network device when the second network device receives the indication information sent by the first network device when executing the first process, and the first process includes: and the terminal equipment connected with the first network equipment is switched to be connected with the second network equipment.

It should be understood that the first network device in the method 400 corresponds to the first network device in the method 200, the second network device in the method 400 corresponds to the second network device in the method 200, the third network device in the method 400 corresponds to the third network device in the method 200, and the terminal device in the method 400 corresponds to the terminal device in the method 200, and therefore, for brevity, no further description is provided herein.

Therefore, according to the method for establishing connection in the embodiment of the application, in the process that the terminal device changes from being connected with the first network device to being connected with the second network device through a redirection or switching manner, the first network device can send the indication information to the terminal device, so that the terminal device can be connected to the third network device from the second network device according to the preset conditions, the problem that the terminal device of 5G immediately returns to the 5G network after completing the specific service under the condition that the terminal device of 5G falls back to 4G to execute the specific service can be solved, and a user can use the 5G network to the maximum extent, so that the user experience is guaranteed.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The method for establishing a connection according to the embodiment of the present application is described in detail above with reference to fig. 1 to 4, and a network device and a terminal device according to the embodiment of the present application are described below with reference to fig. 5 to 10.

As shown in fig. 5, a network device 500 according to an embodiment of the present application includes: a processing unit 510 and a transceiver unit 520, specifically, the transceiver unit 520 is configured to: in a case where the processing unit 510 executes a first process, sending indication information to a target device, where the indication information is used to indicate the target device to connect a terminal device to a third network device through a second process according to a preset condition, where the target device is the terminal device or a second network device, and the first process includes: the terminal device connected to the network device 500 is connected to the second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device.

As one embodiment, the first process includes: the terminal device connected to the network device 500 is connected to the second network device through redirection or handover, and/or the second procedure includes: the terminal device connected to the second network device is connected to the third network device by redirection or handover.

For one embodiment, the indication information includes an execution purpose of the network device 500 to execute the first procedure.

As an embodiment, the execution purpose is for the target device to determine the corresponding preset condition.

As an embodiment, the indication information includes the preset condition.

As an embodiment, the preset condition includes: and connecting the terminal equipment to the third network equipment through the second process at a preset time and/or a preset place.

As an embodiment, the target device is the terminal device, and the transceiver unit 520 is configured to: and sending the indication information to the terminal equipment, wherein the indication information is used for indicating the terminal equipment to be connected to the third network equipment through the second process according to preset conditions.

As an embodiment, the transceiving unit 520 is configured to: sending the indication information to the second network device, where the second network device is configured to send the indication information to the terminal device, and the first process includes: the terminal device connected to the network device 500 switches to connect to the second network device.

As one embodiment, the second process includes: and after the terminal equipment connected with the second network equipment executes connection release and enters an idle state, the terminal equipment is connected with the third network equipment through a reselection mechanism.

For an embodiment, the target device is the second network device, and the transceiver unit 520 is configured to: in a case where the processing unit 510 executes the first procedure, the indication information is sent to the second network device, where the indication information is used to instruct the second network device to connect the terminal device to the third network device through the second procedure according to a preset condition.

As one embodiment, the first process includes: the terminal device connected to the network device 500 switches to connect to the second network device.

As an embodiment, the transceiving unit 520 is configured to: and sending the indication information to the terminal equipment, wherein the terminal equipment is used for sending the indication information to the second network equipment.

As one embodiment, the second process includes: the terminal device connected to the second network device is connected to the third network device by switching.

As an embodiment, the transceiving unit 520 is configured to: and sending an RRC connection release message or a switching request message to the terminal equipment, wherein the RRC connection release message or the switching request message comprises the indication information.

As an embodiment, the transceiving unit 520 is configured to: and sending the indication information to the second network equipment through a direct connection interface, or sending the indication information to the second network equipment through core network equipment.

As an embodiment, the network device 500 and the third network device satisfy at least one of the following conditions: corresponding to the same access system, the same PLMN, the same core network type and the same network slice.

As an embodiment, at least two of the network device 500, the second network device, and the third network device satisfy at least one of the following conditions: corresponding to different core network types, corresponding to different PLMNs, corresponding to different network slices and corresponding to different access modes.

It should be understood that the network device 500 according to the embodiment of the present application may correspond to performing the method 200 in the embodiment of the present application, and the above and other operations and/or functions of each unit in the network device 500 are respectively for implementing corresponding flows of the first network device in the methods in fig. 1 to fig. 4, and are not described herein again for brevity.

Therefore, in the network device according to the embodiment of the application, in the process that the terminal device connected to the network device is changed to be connected to the second network device through redirection or switching, the indication information may be sent to the second network device or the terminal device, so that the terminal device may be connected to the third network device from the second network device according to the preset condition, and the problem that the terminal device of 5G immediately returns to the 5G network after completing the specific service when falling back to 4G to execute the specific service can be solved, so that the user can use the 5G network to the maximum extent, and thus the user experience is ensured.

As shown in fig. 6, a network device 600 according to an embodiment of the present application includes: a processing unit 610 and a transceiving unit 620, specifically, the transceiving unit 620 is configured to: under the condition of executing a first process, receiving indication information sent by first network equipment; the processing unit 610 is configured to: according to the indication information, the terminal device is connected to a third network device through a second process according to preset conditions, wherein the first process comprises the following steps: the terminal device connected to the first network device is connected to the network device 600, and the second process includes: the terminal device connected to the network device 600 is connected to the third network device.

As one embodiment, the first process includes: the terminal device connected to the first network device is connected to the network device 600 by redirection or handover, and/or the second procedure includes: the terminal device connected to the network device 600 is connected to the third network device by switching.

For one embodiment, the processing unit 610 is further configured to: and determining the preset condition corresponding to the execution purpose.

As an example, the implementation aims to: the terminal device performs a first specific service on the network device 600.

As an embodiment, the indication information includes the preset condition.

As an embodiment, the preset condition includes: the network device 600 connects the terminal device to the third network device through the second process at a preset time and/or a preset place.

As an embodiment, the preset condition includes: after the terminal device finishes executing the first specific service on the network device 600, and/or in case the terminal device needs to execute the second specific service, the terminal device is connected to the third network device through the second procedure.

As an embodiment, the transceiving unit 620 is configured to: receiving the indication information sent by the first network device through a direct connection interface or a core network device under the condition of executing the first procedure, wherein the first procedure comprises: the terminal device connected to the first network device switches to connect to the network device 600.

As an embodiment, the transceiving unit 620 is configured to: and under the condition of executing the first process, receiving the indication information sent by the terminal equipment, wherein the indication information is sent by the first network equipment received by the terminal equipment under the condition of executing the first process.

As an embodiment, the transceiving unit 620 is configured to: in the case of performing the first procedure, an RRC connection setup request message or a handover complete message sent by the terminal device is received, the RRC connection setup request message or the handover complete message including the indication information.

As an embodiment, at least two of the first network device, the network device 600, and the third network device satisfy at least one of the following conditions: corresponding to different core network types, corresponding to different PLMNs, corresponding to different network slices and corresponding to different access modes.

It should be understood that the network device 600 according to the embodiment of the present application may correspond to the method 300 implemented in the embodiment of the present application, and the above and other operations and/or functions of each unit in the network device 600 are respectively for implementing corresponding flows of the second network device in each method in fig. 1 to fig. 4, and are not described herein again for brevity.

Therefore, in the network device according to the embodiment of the application, in the process that the terminal device connected to the first network device is connected to the network device through redirection or switching, the first network device may send the indication information to the network device, so that the network device may connect the terminal device from the second network device to the third network device according to the preset condition, and the problem that the terminal device of 5G immediately returns to the 5G network after completing the specific service when the terminal device of 5G falls back to 4G to execute the specific service can be solved, so that the user can use the 5G network to the maximum extent, thereby ensuring user experience.

As shown in fig. 7, a terminal device 700 according to an embodiment of the present application includes: a processing unit 710 and a transceiver unit 720, specifically, the transceiver unit 720 is configured to: under the condition of executing a first process, receiving indication information sent by first network equipment; the processing unit 710 is configured to: according to the indication information, connecting to a third network device through a second process according to a preset condition, wherein the first process comprises the following steps: the terminal device connected to the first network device is connected to a second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device.

As an embodiment, the processing unit 710 is further configured to: and determining the preset condition corresponding to the execution purpose.

As an embodiment, the indication information includes the preset condition.

As an embodiment, the transceiving unit 720 is configured to: and receiving an RRC connection release message or a switching request message sent by the first network equipment under the condition of executing the first process, wherein the RRC connection release message or the switching request message comprises the indication information.

As an embodiment, the transceiving unit 720 is configured to: receiving the indication information sent by the second network device when the first process is executed, where the indication information is sent by the first network device when the second network device executes the first process, and the first process includes: and the terminal equipment connected with the first network equipment is switched to be connected with the second network equipment.

It should be understood that the terminal device 700 according to the embodiment of the present application may correspond to performing the method 400 in the embodiment of the present application, and the above and other operations and/or functions of each unit in the terminal device 700 are respectively for implementing corresponding flows of the terminal device in each method in fig. 1 to fig. 4, and are not described herein again for brevity.

Therefore, the terminal device of the embodiment of the application can receive the indication information sent by the first network device in the process of changing the connection with the first network device into the connection with the second network device through a redirection or switching manner, so that the terminal device can be connected to the third network device from the second network device according to the preset conditions, the problem that the terminal device of 5G immediately returns to the 5G network after completing the specific service when the terminal device of 5G falls back to 4G to execute the specific service can be solved, and a user can use the 5G network to the maximum extent, thereby ensuring user experience.

Fig. 8 is a schematic structural diagram of a communication device 800 according to an embodiment of the present application. The communication device 800 shown in fig. 8 comprises a processor 810, and the processor 810 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

As one embodiment, as shown in fig. 8, communication device 800 may also include memory 820. From the memory 820, the processor 810 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 820 may be a separate device from the processor 810 or may be integrated into the processor 810.

For one embodiment, as shown in fig. 8, the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 830 may include a transmitter and a receiver, among others. The transceiver 830 may further include one or more antennas.

As an embodiment, the communication device 800 may specifically be a network device in the embodiment of the present application, and the communication device 800 may implement a corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, no further description is given here.

As an embodiment, the communication device 800 may specifically be a mobile terminal/terminal device according to the embodiment of the present application, and the communication device 800 may implement a corresponding process implemented by the mobile terminal/terminal device in each method according to the embodiment of the present application, and for brevity, details are not described here again.

Fig. 9 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 900 shown in fig. 9 includes a processor 910, and the processor 910 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

For one embodiment, as shown in FIG. 9, chip 900 may also include memory 920. From the memory 920, the processor 910 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 920 may be a separate device from the processor 910, or may be integrated in the processor 910.

For one embodiment, the chip 900 may also include an input interface 930. The processor 910 may control the input interface 930 to communicate with other devices or chips, and in particular, may obtain information or data transmitted by other devices or chips.

For one embodiment, the chip 900 may also include an output interface 940. The processor 910 may control the output interface 940 to communicate with other devices or chips, and in particular, may output information or data to the other devices or chips.

As an embodiment, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement a corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, no further description is given here.

As an embodiment, the chip may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip may implement a 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 chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

Fig. 10 is a schematic block diagram of a communication system 1000 provided in an embodiment of the present application. As shown in fig. 10, the communication system 1000 includes a terminal device 1010 and a network device 1020.

The terminal device 1010 may be configured to implement corresponding functions implemented by the terminal device in the foregoing method, and the network device 1020 may be configured to implement corresponding functions implemented by any one of the network devices in the foregoing method, that is, the network device 1020 may be any one of the first network device, the second network device, and the third network device, and for brevity, details are not described here again.

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.

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

As an embodiment, 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 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.

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

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

As an embodiment, 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.

As an embodiment, the computer program may be applied to the network device in the embodiments of the present application, and when the computer program runs on a computer, the computer is enabled to execute corresponding processes implemented by the network device in the methods in the embodiments of the present application, and for brevity, details are not described here again.

As an embodiment, 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 a 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. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of 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 execute 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

1. A method for establishing a connection, comprising:

the method comprises the steps that a first network device sends indication information to a target device under the condition that a first process is executed, wherein the indication information is used for indicating the target device to connect a terminal device to a third network device through a second process according to preset conditions, and the preset conditions comprise: connecting the terminal device to the third network device through the second process under the condition that the terminal needs to execute a second specific service;

wherein the target device is the terminal device or a second network device,

the first process includes: the terminal device connected to the first network device is connected to the second network device,

the second process includes: the terminal device connected to the second network device is connected to the third network device.

2. The method of claim 1, wherein the first process comprises: the terminal device connected with the first network device is connected to the second network device through redirection or switching, and/or

The second process includes: and the terminal equipment connected with the second network equipment is connected to the third network equipment through redirection or switching.

3. The method according to claim 1 or 2, wherein the indication information includes an execution purpose for the first network device to execute the first procedure.

4. The method of claim 3, wherein the execution purpose is for the target device to determine the corresponding preset condition.

5. The method of claim 3, wherein the execution is for: and the terminal equipment executes the first specific service on the second network equipment.

6. The method according to claim 1 or 2, wherein the indication information comprises the preset condition.

7. The method according to claim 1 or 2, wherein the preset condition further comprises:

after the terminal device executes the first specific service on the second network device, connecting the terminal device to the third network device through the second process.

8. The method of claim 5, wherein the first specific service comprises at least one of: voice traffic, video traffic, and emergency call traffic.

9. The method according to claim 1 or 2, wherein the target device is the terminal device,

the sending of the indication information to the target device includes:

and the first network equipment sends the indication information to the terminal equipment, wherein the indication information is used for indicating the terminal equipment to be connected to the third network equipment through the second process according to preset conditions.

10. The method of claim 9, wherein the first network device sends the indication information to the terminal device, and wherein the sending comprises:

the first network device sends the indication information to the second network device, and the second network device is configured to send the indication information to the terminal device, where the first process includes: and the terminal equipment connected with the first network equipment is switched to be connected with the second network equipment.

11. The method of claim 9, wherein the second process comprises: and after the terminal equipment connected with the second network equipment executes connection release and enters an idle state, the terminal equipment is connected with the third network equipment through a reselection mechanism.

12. The method according to claim 1 or 2, wherein the target device is the second network device,

the first network device sends indication information to a target device under the condition of executing a first process, and the indication information comprises:

the first network device transmitting the indication information to the second network device while performing a first procedure,

the indication information is used for indicating the second network device to connect the terminal device to the third network device through the second process according to a preset condition.

13. The method of claim 12, wherein the first process comprises: and the terminal equipment connected with the first network equipment is switched to be connected with the second network equipment.

14. The method of claim 12, wherein the sending the indication information to the second network device comprises:

and the first network equipment sends the indication information to the terminal equipment, and the terminal equipment is used for sending the indication information to the second network equipment.

15. The method of claim 12, wherein the second process comprises: and the terminal equipment connected with the second network equipment is connected to the third network equipment through switching.

16. The method of claim 9, wherein the first network device sends the indication information to the terminal device, and wherein the sending comprises:

the first network equipment sends a Radio Resource Control (RRC) connection release message or a switching request message to the terminal equipment, wherein the RRC connection release message or the switching request message comprises the indication information.

17. The method of claim 10, wherein the first network device sends the indication information to the second network device, and wherein the sending comprises:

the first network device sends the indication information to the second network device through a direct connection interface, or

And the first network equipment sends the indication information to the second network equipment through core network equipment.

18. The method according to claim 1 or 2, wherein the first network device and the third network device satisfy at least one of the following conditions:

corresponding to the same access system, the same public land mobile network PLMN, the same core network type and the same network slice.

19. The method according to claim 1 or 2, wherein at least two of the first network device, the second network device and the third network device satisfy at least one of the following conditions:

corresponding to different core network types, corresponding to different PLMNs, corresponding to different network slices and corresponding to different access modes.

20. A method for establishing a connection, comprising:

the second network equipment receives the indication information sent by the first network equipment under the condition of executing the first process;

the second network device connects the terminal device to a third network device through a second process according to the indication information and preset conditions, wherein the preset conditions include: connecting the terminal device to the third network device through the second process under the condition that the terminal needs to execute a second specific service;

wherein the first process comprises: the terminal device connected to the first network device is connected to the second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device.

21. The method of claim 20, wherein the first process comprises: the terminal device connected with the first network device is connected to the second network device through redirection or switching, and/or

The second process includes: and the terminal equipment connected with the second network equipment is connected to the third network equipment through switching.

22. The method according to claim 20 or 21, wherein the indication information comprises an execution purpose of the first network device to execute the first procedure.

23. The method of claim 22, further comprising:

and the second network equipment determines the preset condition corresponding to the execution purpose.

24. The method of claim 22, wherein the performing is for: and the terminal equipment executes the first specific service on the second network equipment.

25. The method according to claim 20 or 21, wherein the indication information comprises the preset condition.

26. The method according to claim 20 or 21, wherein the preset condition further comprises:

27. The method of claim 24, wherein the first specific service comprises at least one of: voice traffic, video traffic, and emergency call traffic.

28. The method according to claim 20 or 21, wherein the receiving, by the second network device, the indication information sent by the first network device while performing the first procedure comprises:

the second network device receives the indication information sent by the first network device through a direct connection interface or a core network device under the condition of executing the first process,

wherein the first process comprises: and the terminal equipment connected with the first network equipment is switched to be connected with the second network equipment.

29. The method according to claim 20 or 21, wherein the receiving, by the second network device, the indication information sent by the first network device while performing the first procedure comprises:

and the second network equipment receives the indication information sent by the terminal equipment under the condition of executing the first process, wherein the indication information is sent by the first network equipment when the terminal equipment executes the first process.

30. The method of claim 29, wherein the receiving, by the second network device, the indication information sent by the terminal device while performing the first procedure comprises:

and the second network equipment receives a Radio Resource Control (RRC) connection establishment request message or a switching completion message sent by the terminal equipment under the condition of executing the first process, wherein the RRC connection establishment request message or the switching completion message comprises the indication information.

31. The method according to claim 20 or 21, wherein the first network device and the third network device satisfy at least one of the following conditions:

32. The method according to claim 20 or 21, wherein at least two of the first network device, the second network device and the third network device satisfy at least one of the following conditions:

33. A method for establishing a connection, comprising:

the method comprises the steps that under the condition that a terminal device executes a first process, indication information sent by first network equipment is received;

the terminal device is connected to a third network device through a second process according to the indication information and preset conditions, wherein the preset conditions comprise: connecting the terminal device to the third network device through the second process under the condition that the terminal needs to execute a second specific service;

wherein the first process comprises: the terminal device connected to the first network device is connected to a second network device, and the second process includes: the terminal device connected to the second network device is connected to the third network device.

34. The method of claim 33, wherein the first process comprises: the terminal device connected with the first network device is connected to the second network device through redirection or switching, and/or

The second process includes: and the terminal equipment connected with the second network equipment is connected to the third network equipment through redirection.

35. The method according to claim 33 or 34, wherein the indication information comprises an execution purpose of the first network device to execute the first procedure.

36. The method of claim 35, further comprising:

and the terminal equipment determines the preset condition corresponding to the execution purpose.

37. The method of claim 35, wherein the performing is for: and the terminal equipment executes the first specific service on the second network equipment.

38. The method according to claim 33 or 34, wherein the indication information comprises the preset condition.

39. The method according to claim 33 or 34, wherein the preset condition further comprises:

after the terminal device executes the first specific service on the second network device, the terminal device is connected to the third network device through the second process.

40. The method of claim 37, wherein the first specific service comprises at least one of: voice traffic, video traffic, and emergency call traffic.

41. The method according to claim 33 or 34, wherein the receiving, by the terminal device, the indication information sent by the first network device in the case of performing the first procedure comprises:

and the terminal equipment receives a Radio Resource Control (RRC) connection release message or a switching request message sent by the first network equipment under the condition of executing the first process, wherein the RRC connection release message or the switching request message comprises the indication information.

42. The method according to claim 33 or 34, wherein the receiving, by the terminal device, the indication information sent by the first network device in the case of performing the first procedure comprises:

the terminal device receives the indication information sent by the second network device when executing the first process, where the indication information is sent by the first network device when the second network device executes the first process, and the first process includes: and the terminal equipment connected with the first network equipment is switched to be connected with the second network equipment.

43. The method according to claim 33 or 34, wherein the first network device and the third network device satisfy at least one of the following conditions:

44. The method according to claim 33 or 34, wherein at least two of the first network device, the second network device and the third network device satisfy at least one of the following conditions:

45. A network device, comprising: a processing unit and a transceiving unit,

the transceiver unit is configured to:

under the condition that the processing unit executes a first process, sending indication information to a target device, wherein the indication information is used for indicating the target device to connect a terminal device to a third network device through a second process according to preset conditions, and the preset conditions comprise: connecting the terminal device to the third network device through the second process under the condition that the terminal needs to execute a second specific service;

wherein the target device is the terminal device or a second network device,

the first process includes: the terminal device connected to the network device is connected to the second network device,

46. The network device of claim 45, wherein the first procedure comprises: the terminal device connected to the network device is connected to the second network device by redirection or handover, and/or

47. The network device according to claim 45 or 46, wherein the indication information comprises an execution purpose of the network device to execute the first procedure.

48. The network device of claim 47, wherein the execution purpose is for the target device to determine the corresponding preset condition.

49. The network device of claim 47, wherein the execution is for: and the terminal equipment executes the first specific service on the second network equipment.

50. The network device according to claim 45 or 46, wherein the indication information comprises the preset condition.

51. The network device according to claim 45 or 46, wherein the preset condition further comprises:

52. The network device of claim 49, wherein the first specific service comprises at least one of: voice traffic, video traffic, and emergency call traffic.

53. The network device of claim 45 or 46, wherein the target device is the terminal device,

the transceiver unit is configured to:

and sending the indication information to the terminal equipment, wherein the indication information is used for indicating the terminal equipment to be connected to the third network equipment through the second process according to preset conditions.

54. The network device of claim 53, wherein the transceiver unit is configured to:

sending the indication information to the second network device, where the second network device is configured to send the indication information to the terminal device, and the first process includes: and the terminal equipment connected with the network equipment is switched to be connected with the second network equipment.

55. The network device of claim 53, wherein the second process comprises: and after the terminal equipment connected with the second network equipment executes connection release and enters an idle state, the terminal equipment is connected with the third network equipment through a reselection mechanism.

56. The network device of claim 45 or 46, wherein the target device is the second network device,

the transceiver unit is configured to:

transmitting the indication information to the second network device in a case where the processing unit performs the first procedure,

57. The network device of claim 56, wherein the first process comprises: and the terminal equipment connected with the network equipment is switched to be connected with the second network equipment.

58. The network device of claim 56, wherein the transceiver unit is configured to:

and sending the indication information to the terminal equipment, wherein the terminal equipment is used for sending the indication information to the second network equipment.

59. The network device of claim 56, wherein the second process comprises: and the terminal equipment connected with the second network equipment is connected to the third network equipment through switching.

60. The network device of claim 53, wherein the transceiver unit is configured to:

and sending a Radio Resource Control (RRC) connection release message or a switching request message to the terminal equipment, wherein the RRC connection release message or the switching request message comprises the indication information.

61. The network device of claim 54, wherein the transceiver unit is configured to:

sending the indication information to the second network device through a direct connection interface, or

And sending the indication information to the second network equipment through core network equipment.

62. The network device of claim 45 or 46, wherein the network device and the third network device satisfy at least one of the following conditions:

63. The network device of claim 45 or 46, wherein at least two of the network device, the second network device, and the third network device satisfy at least one of the following conditions:

64. A network device, comprising:

the receiving and sending unit is used for receiving the indication information sent by the first network equipment under the condition of executing the first process;

a processing unit, configured to connect, according to the indication information and according to a preset condition, the terminal device to a third network device through a second process, where the preset condition includes: connecting the terminal device to the third network device through the second process under the condition that the terminal needs to execute a second specific service;

wherein the first process comprises: the terminal device connected to the first network device is connected to the network device, and the second process includes: the terminal device connected to the network device is connected to the third network device.

65. The network device of claim 64, wherein the first process comprises: the terminal device connected to the first network device is connected to the network device by redirection or handover, and/or

The second process includes: and the terminal equipment connected with the network equipment is connected to the third network equipment through switching.

66. The network device of claim 64 or 65, wherein the indication information comprises an execution purpose of the first network device to execute the first procedure.

67. The network device of claim 66, wherein the processing unit is further configured to:

and determining the preset condition corresponding to the execution purpose.

68. The network device of claim 66, wherein the execution is for: the terminal device executes a first specific service on the network device.

69. The network device of claim 64 or 65, wherein the indication information comprises the preset condition.

70. The network device of claim 64 or 65, wherein the preset condition further comprises:

connecting the terminal device to the third network device through the second process after the terminal device finishes executing the first specific service on the network device.

71. The network device of claim 68, wherein the first specific service comprises at least one of: voice traffic, video traffic, and emergency call traffic.

72. The network device of claim 64 or 65, wherein the transceiver unit is configured to:

receiving the indication information sent by the first network device through a direct connection interface or a core network device under the condition of executing the first process,

wherein the first process comprises: and the terminal equipment connected with the first network equipment is switched to be connected with the network equipment.

73. The network device of claim 64 or 65, wherein the transceiver unit is configured to:

and receiving the indication information sent by the terminal equipment under the condition of executing the first process, wherein the indication information is sent by the first network equipment when the terminal equipment executes the first process.

74. The network device of claim 73, wherein the transceiver unit is configured to:

and under the condition of executing the first process, receiving a Radio Resource Control (RRC) connection establishment request message or a switching completion message sent by the terminal equipment, wherein the RRC connection establishment request message or the switching completion message comprises the indication information.

75. The network device of claim 64 or 65, wherein the first network device and the third network device satisfy at least one of the following conditions:

76. The network device of claim 64 or 65, wherein at least two of the first network device, the network device, and the third network device satisfy at least one of the following conditions:

77. A terminal device, comprising: a processing unit and a transceiving unit,

a processing unit, configured to connect to a third network device through a second process according to the indication information and according to a preset condition, where the preset condition includes: connecting the terminal device to the third network device through the second process under the condition that the terminal needs to execute a second specific service;

78. The terminal device of claim 77, wherein the first process comprises: the terminal device connected with the first network device is connected to the second network device through redirection or switching, and/or

79. The terminal device according to claim 77 or 78, wherein the indication information comprises an execution purpose for the first network device to execute the first procedure.

80. The terminal device of claim 79, wherein the processing unit is further configured to:

and determining the preset condition corresponding to the execution purpose.

81. The terminal device of claim 79, wherein the execution is for: and the terminal equipment executes the first specific service on the second network equipment.

82. The terminal device according to claim 77 or 78, wherein the indication information comprises the preset condition.

83. The terminal device according to claim 77 or 78, wherein the preset condition further comprises:

84. The terminal device of claim 81, wherein the first specific service comprises at least one of: voice traffic, video traffic, and emergency call traffic.

85. The terminal device according to claim 77 or 78, wherein the transceiver unit is configured to:

and receiving a Radio Resource Control (RRC) connection release message or a handover request message sent by the first network equipment under the condition of executing the first process, wherein the RRC connection release message or the handover request message comprises the indication information.

86. The terminal device according to claim 77 or 78, wherein the transceiver unit is configured to:

receiving the indication information sent by the second network device when the first process is executed, where the indication information is sent by the first network device when the second network device executes the first process, and the first process includes: and the terminal equipment connected with the first network equipment is switched to be connected with the second network equipment.

87. The terminal device of claim 77 or 78, wherein the first network device and the third network device satisfy at least one of the following conditions:

88. The terminal device of claim 77 or 78, wherein at least two of the first network device, the second network device and the third network device satisfy at least one of the following conditions:

89. A network device, comprising: processor, transceiver and memory, said memory and said transceiver being connected to said processor, said memory being adapted to store a computer program, said processor being adapted to invoke and execute the computer program stored in said memory, performing the method for establishing a connection according to any of claims 1 to 32.

90. A terminal device, comprising: processor, transceiver and memory, said memory and said transceiver being connected to said processor, said memory being adapted to store a computer program, said processor being adapted to call and run the computer program stored in said memory, to perform the method for establishing a connection according to any of claims 33 to 44.

91. A chip, comprising: a processor for calling up and running a computer program from a memory so that a device on which the chip is installed performs the method for establishing a connection as claimed in any one of claims 1 to 32.

92. A chip, comprising: a processor for calling up and running a computer program from a memory so that a device on which the chip is installed performs the method for establishing a connection as claimed in any one of claims 33 to 44.

93. A computer-readable storage medium for storing a computer program which causes a computer to perform the method for establishing a connection according to any one of claims 1 to 32.

94. A computer-readable storage medium for storing a computer program which causes a computer to perform the method for establishing a connection according to any one of claims 33 to 44.