CN110741681A

CN110741681A - Method for establishing connection, network equipment and terminal equipment

Info

Publication number: CN110741681A
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: 2020-01-31
Anticipated expiration: 2038-12-06
Also published as: CN110741681B; WO2020113520A1

Abstract

The method comprises the step of sending, by a network device, indication information to a target device under the condition of executing a process, wherein the indication information is used for indicating the target device to connect the 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, the process comprises the step of connecting the terminal device connected with the network device to the second network device, and the second process comprises the step of connecting the terminal device connected with the second network device to the third network device.

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, the network may not be able to support a New Voice over New Radio (VoNR), or in 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 (VoLTE), thereby completing a request for Voice establishment by a User Equipment (UE).

However, after the VoLTE voice is completed, there is no mechanism for a UE dedicated to to perform a 5G- >4G fallback to establish voice, which can trigger it to perform a fast return to the 5G network.

Disclosure of Invention

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

In , there is provided a method for establishing a connection, including that a th network device sends indication information to a target device in a case of executing a th procedure, the indication information being used for indicating the target device to connect a terminal device to a third network device through a second procedure according to preset conditions, wherein the target device is the terminal device or a second network device, the th procedure includes that the terminal device connected with the th network device is connected to the second network device, and the second procedure includes that the terminal device connected with the second network device is connected to the third network device.

In a second aspect, a method for establishing a connection is provided, including a second network device receiving indication information sent by a th network device when executing a th procedure, and the second network device connecting a terminal device to a third network device through a second procedure according to the indication information and preset conditions, wherein the th procedure includes that the terminal device connected with the th network device is connected to the second network device, and the second procedure includes that the terminal device connected with the second network device is connected to the third network device.

In a third aspect, a method for establishing connection is provided, including that a terminal device receives indication information sent by a th network device under the condition of executing a th process, and the terminal device connects to a third network device through a second process according to preset conditions according to the indication information, wherein the th process includes that the terminal device connected with the th network device connects to a second network device, and the second process includes that the terminal device connected with the second network device connects to the third network device.

In a fourth aspect, network devices are provided for performing the method of any of the above aspects through or implementations thereof, and in particular, the terminal device includes functional modules for performing the method of the above aspect or implementations thereof.

In particular, the network device comprises functional modules for executing the method in the third aspect or the implementation modes thereof.

In a sixth aspect, there is provided network devices, comprising a processor and a memory, the memory storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of the through aspects or implementations thereof.

In a seventh aspect, terminal devices are provided, which include a processor and a memory, where the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and execute the method in the third aspect or its implementation manner.

In an eighth aspect, chips are provided for implementing the method of any of the through third aspects or implementations thereof, and particularly, the chip comprises a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any of the through second aspects or implementations thereof.

In a ninth aspect, there is provided computer readable storage media for storing a computer program for causing a computer to perform the method of any aspect or implementations of the foregoing aspects from to third aspects.

In a tenth aspect, there is provided computer program products comprising computer program instructions to cause a computer to perform the method of any aspect or implementations of aspects through third.

Tenth there is provided computer programs which, when run on a computer, cause the computer to perform the method of any of the to third aspects described above or implementations thereof.

Through the technical scheme, in the process that the terminal device connected with the th network device is connected to the second network device through redirection or switching, the th network device can send indication information to the second network device or the terminal device, so that the terminal device can be connected to the third network device from the second network device according to preset conditions, the problem that the 5G terminal device immediately returns to the 5G network after completing a specific service under the condition that the terminal device falls back to the 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.

Drawings

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

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

Fig. 3 is another schematic flow chart of methods for establishing a connection provided by embodiments of the present application.

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

Fig. 5 is a schematic block diagram of kinds of network devices provided in the embodiment of the present application.

Fig. 6 is another schematic block diagram of network devices provided in an embodiment of the present application.

Fig. 7 is a schematic block diagram of kinds of terminal devices provided in the embodiment of the present application.

Fig. 8 is a schematic block diagram of communication devices provided in the embodiments of the present application.

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

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

Detailed Description

The 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, but not all, embodiments .

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. Optionally, the Network device 110 may be a base 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 Station, 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 includes at least terminal devices 120 located within the coverage Area of the Network device 110 as used herein "terminal devices" include, but are not limited to, via a wireline connection, such as via a 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, such as for a cellular Network, Wireless Local Area Network (WLAN), a Digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcaster, and/or another terminal device configured to receive/transmit communication signals, and/or an Internet of Things (IoT) device, and/or a terminal device configured to communicate via a Wireless interface may be referred to as a "Wireless communication terminal," Wireless terminal "or" mobile terminal ", including examples of mobile terminals including or mobile terminals that may be connected to a cellular Telephone System, a Wireless terminal, a Wireless Telephone System, a Wireless terminal, a Wireless Telephone, a Wireless terminal device, a Wireless Telephone System, a Wireless terminal, a Wireless Telephone, a Wireless Network, a Wireless terminal, a Wireless Network, a Wireless Telephone System, a Wireless Telephone, a Wireless terminal, a Wireless Telephone, a Wireless Network, a Wireless Telephone, a Wireless Network, a Wireless terminal, a Wireless Network.

Optionally, a Device to Device (D2D) communication may be performed between the terminal devices 120.

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

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

Optionally, 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 merely describes associations describing the associated object, meaning that there may be three relationships, e.g., a and/or B, three cases of a alone, a and B together, and B alone.

Fig. 2 is a schematic flowchart of methods 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 th network device, and the th network device may be the network device shown in fig. 1. as shown in fig. 2, the method 200 includes S210, where the th network device sends, in a case of executing a th procedure, indication information to a target device, where the indication information is used to instruct the target device to connect a terminal device to a third network device through a second procedure according to preset conditions, and the target device is the terminal device or the second network device.

Specifically, in the process, the terminal device connected with the th network device can be connected with the second network device instead by means of redirection or switching, wherein the redirection mode can comprise that the terminal device returns to an idle state by releasing the connection with the th network device and is connected with the second network device by a reselection mechanism, and the switching mode can comprise that the terminal device is switched to the second network device from the th network device under the condition that the terminal device keeps Radio Resource Control (RRC) connection with the th network device.

The terminal device connected with the second network device can be changed to be connected with the third network device through redirection or switching, wherein the redirection mode can comprise that the terminal device returns to an idle state through releasing the connection with the second network device and is connected with the third network device through a reselection mechanism, and the switching mode can comprise that the terminal device is switched from the second network device to the third network device under the condition that the terminal device keeps RRC connection with the network device.

In an embodiment of the present application, the th, second, and third network devices may be any network devices, wherein for any two of the network devices, at least 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 formats.

In this embodiment of the application, in a case where the th network device and the terminal device execute the th procedure, the th network device may send, to the target device, indication information for indicating that the target device connects the terminal device to the third network device through the second procedure according to a preset condition.

Optionally, as embodiments, the indication information may include an execution purpose of the network device executing the th procedure, specifically, the execution purpose may be that the terminal device executes the th specific service on the second network device, wherein the th specific service may include at least of a voice service, a video service and an emergency call service.

For example, assuming that the execution purpose is that the terminal device executes -th specific service on the second network device, the preset condition corresponding to the execution purpose may be related to -th specific service, for example, the preset condition may include that the terminal device is connected to the third network device through the second process after the terminal device executes -th specific service, or the preset condition may further include that the terminal device is connected to the third network device through the second process when the terminal device needs to execute second specific service after the terminal device executes -th specific service, wherein the second specific service may include at least of voice service, video service and emergency call service.

Specifically, the target receives the indication information, and connects the terminal device to the third network device through the second process according to the preset condition, wherein the preset condition may include that the terminal device is connected to the third network device through the second process at a preset time and/or a preset place, and the target device connects the terminal device to the third network device according to the preset condition when the preset time and/or the preset place is reached.

Or, the preset condition may further include connecting the terminal device to the third network device through the second process after the terminal device ends executing th specific service on the second network device and/or in case the terminal device needs to execute a second specific service, wherein the th specific service may include at least of voice service, video service and emergency call service, and the second specific service may also include at least of voice service, video service and emergency call service.

For example, it is assumed that the preset condition includes that the terminal device is connected to the third network device through the second process after the terminal device performs th specific service on the second network device, wherein the th specific service may be voice service.

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, assuming that the preset condition includes that the terminal device is connected to the third network device through the second process after the terminal device executes th specific service on the second network device and needs to execute the second specific service, wherein the th specific service may be a voice service and the second service may be an emergency call service.

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

Optionally, as embodiments, for a case that the target device is the terminal device, that is, for a case that the network device performs the th procedure with the terminal device, sending indication information to the terminal device, so that the terminal device connects to a third network device through the second procedure according to a preset condition according to the indication information, specifically, the network device sending the indication information to the terminal device may include the network device sending the indication information directly or indirectly to the terminal device.

Optionally, for th network device directly sends indication information to the terminal device, for example, assuming that the th procedure is that the terminal device connected to the th network device is changed to be connected to the second network device by redirection, the th network device may send an RRC connection release message to the terminal device, so that the terminal device disconnects the RRC connection with the th network device according to the RRC connection release message and returns to an idle state, wherein the RRC connection release message may include the indication information in the embodiment of the present application, for example, assuming that the th procedure is that the terminal device connected to the th network device is changed to be connected to the second network device by handover, the th network device may send a handover request message to the terminal device, so that the terminal device switches from the th network device to the second network device according to the handover request message, wherein the handover request message may also include the indication information in the embodiment of the present application.

Specifically, the network device sending the indication information to the second network device may include the network device sending the indication information to the second network device through a direct connection interface or through a core network device, for example, the network device sending the indication information to the second network device through an Xn interface, and for another example, the network device transmitting the indication information to the second network device through the core network device through an N2 interface.

Specifically, for convenience of description, it is assumed that the second network device receives the indicating information sent by the th network device as the th indicating information, and the second network device sends the indicating information to the terminal device as the second indicating information, where the th indicating information may be the same as the second indicating information, that is, the second network device may directly send the received indicating information to the terminal device, or the second indicating information may be determined by the second network device according to the th indicating information, and both the th indicating information and the second indicating 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.

Specifically, the terminal device is changed from the th network device to the second network device through the th process, and the terminal device needs to be connected to the third network device through the second process under the preset condition according to the indication information.

Optionally, as another embodiment, the target device may also be a second network device, that is, the network device sends instruction information to the second network device when executing the th procedure, so that the second network device connects the terminal device to a third network device through the second procedure according to the instruction information and preset conditions, specifically, the sending of the instruction information by the network device to the second network device may include the network device directly or indirectly sending the instruction information to the second network device.

For example, assuming that the terminal device is switched from the th network device to the second network device by a switching manner, the th network device may directly send the indication information to the second network device by the Xn interface.

Optionally, the th network device indirectly sends the indication information to the second network device, that is, the th network device forwards the indication information to the terminal device through other devices, optionally, the th network device may send the indication information to the second network device through the core network device, for example, the th network device passes through the core network device to the second network device through the N2 interface.

For example, assuming that the procedure is that the terminal device connected to the th network device is changed to connect to the second network device by redirection, the th network device may send an RRC connection release message to the terminal device so that the terminal device disconnects from the th network device according to the RRC connection release message and returns to an idle state, wherein the RRC connection release message may include indication information in the present embodiment, and after the terminal device returns to the idle state and connects to the second network device through a reselection mechanism, the terminal device may send an RRC connection Establishment request message (RRC connection Establishment request) to the second network device to request to establish an RRC connection with the second network device, wherein the RRC connection Establishment request message may include the indication information sent by the th network device, or the RRC connection Establishment request message may include indication information sent by the terminal device according to the indication information sent by the 465 th network device to determine that the terminal device is connected to the second network device according to a preset condition .

For another example, assuming that the th procedure is that a terminal device connected to the th network device is connected to the second network device instead through a Handover manner, the th network device may send a Handover request message to the terminal device, so that the terminal device switches from the th network device to the second network device according to the Handover request message, where the Handover request message may also include the indication information in the embodiment of the present application, and when the terminal device completes the Handover procedure, the terminal device sends a Handover Complete message (Handover Complete) to the second network device, where the Handover Complete message may include the indication information sent by the th 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 th 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, assuming that the preset condition indicated by the indication information is that the terminal device is connected to the third network device after the terminal device completes the th specific service on the second network device, the second network device does not migrate the terminal device according to the preset condition before the terminal device executes the th specific service and switches the terminal device to the third network device after the th specific service is finished.

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

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 an th network device is connected to a second network device through redirection or switching, a th 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 from the perspective of the th network device in the above with reference to fig. 1 to 2, and will be described from the perspective of the second network device and the terminal device in the following with reference to fig. 3 to 4, respectively.

Fig. 3 shows a schematic flowchart of a method 300 for establishing a connection according to an embodiment of the present application, where the 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 as a second network device, as shown in fig. 3, the method 300 includes S310, where the second network device receives indication information sent by a th network device in the case of performing an th procedure, and the second network device connects a terminal device to a third network device through a second procedure according to the indication information and according to preset conditions, where the th procedure includes that the terminal device connected to the th network device is connected to the second network device, and the second procedure includes that the terminal device connected to the second network device is connected to the third network device.

Optionally, as embodiments, the procedure includes that the terminal device connected to the th network device is connected to the second network device through redirection or handover, and/or the second procedure includes that the terminal device connected to the second network device is connected to the third network device through handover.

Optionally, as embodiments, the indication information includes an execution purpose of the network device executing the th procedure.

Optionally, as embodiments, the method 300 further includes determining, by the second network device, the preset condition corresponding to the execution destination.

Optionally, as embodiments, the executing purpose is that the terminal device executes specific service on the second network device.

Optionally, as embodiments, the indication information includes the preset condition.

Optionally, as embodiments, the preset condition includes that the second network device connects the terminal device to the third network device through the second process at a preset time and/or a preset location.

Optionally, as embodiments, the preset condition includes that the terminal device is connected to the third network device through the second procedure after the terminal device finishes executing the specific service on the second network device, and/or in a case that the terminal device needs to execute the second specific service.

Optionally, as embodiments, the specific services include at least of voice service, video service and emergency call service.

Optionally, as embodiments, the receiving, by the second network device, the indication information sent by the th network device when executing the th procedure includes receiving, by the second network device, the indication information sent by the th network device through a direct connection interface or a core network device when executing the th procedure, where the th procedure includes switching, by the terminal device connected to the th network device, to be connected to the second network device.

Optionally, as embodiments, the receiving, by the second network device, the indication information sent by the th network device when the procedure is executed includes receiving, by the second network device, the indication information sent by the terminal device when the procedure is executed, where the indication information is sent by the th network device when the terminal device is executed in the th procedure.

Optionally, as embodiments, the receiving, by the second network device, the indication information sent by the terminal device when the procedure is performed includes receiving, by the second network device, an RRC connection establishment request message or a handover completion message sent by the terminal device when the procedure is performed, where the RRC connection establishment request message or the handover completion message includes the indication information.

Optionally, as embodiments, the network device and the third network device satisfy at least of the following conditions, that is, the same access schemes, the same PLMNs, the same core network types, and the same network slices.

Optionally, as embodiments, at least two network devices of the network device, the second network device, and the third network device satisfy at least of the following conditions, where the at least two network devices correspond to different core network types, different PLMNs, different network slices, and different access schemes.

It should be understood that the th network device in the method 300 corresponds to the th 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, in the method for establishing a connection according to the embodiment of the present application, in a process that a terminal device connected to an th network device is connected to a second network device through redirection or switching, a th network device may send indication information to the second network device, so that the second network device may connect the terminal device from the second network device to a third 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 5G 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.

Fig. 4 shows a schematic flow chart of a method 400 for establishing a connection according to an embodiment of the present application, where the method 400 may be performed by a terminal device, for example, any terminal devices shown in fig. 1, as shown in fig. 4, the method 400 includes S410, where the terminal device receives indication information sent by a th network device in the case of performing a th procedure, and the terminal device connects to a third network device through a second procedure according to a preset condition according to the indication information, where the th procedure includes that the terminal device connected to the th network device connects to a second network device, and the second procedure includes that the terminal device connected to the second network device connects to the third network device.

Optionally, as embodiments, the procedure includes that the terminal device connected to the th network device is connected to the second network device through redirection or handover, and/or the second procedure includes that the terminal device connected to the second network device is connected to the third network device through redirection.

Optionally, as embodiments, the method 400 further includes determining, by the terminal device, the preset condition corresponding to the execution purpose.

Optionally, as embodiments, the preset condition includes that the terminal device is connected to the third network device through the second process at a preset time and/or a preset location.

Optionally, as embodiments, the preset condition includes that the terminal device is connected to the third network device through the second procedure in a case that the terminal device needs to execute the second specific service after the execution of the specific service on the second network device is ended.

Optionally, as embodiments, the receiving, by the terminal device, the indication information sent by the th network device when executing the th procedure includes receiving, by the terminal device, an RRC connection release message or a handover request message sent by the th network device when executing the th procedure, where the RRC connection release message or the handover request message includes the indication information.

Optionally, as embodiments, the receiving, by the terminal device, the indication information sent by the th network device when the procedure is executed includes receiving, by the terminal device, the indication information sent by the second network device when the procedure is executed, where the indication information is sent by the th network device when the second network device is executed by the th procedure, and the th procedure includes switching, by the terminal device connected to the th network device, to connect to the second network device.

It should be understood that the th network device in the method 400 corresponds to the th 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, in the method for establishing a connection according to the embodiment of the present application, in a process that a terminal device changes from being connected to an th network device to being connected to a second network device through a redirection or switching manner, a th network device may send indication information to the terminal device, so that the terminal device may connect 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 a 4G network 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.

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" in this document is only kinds of association relations describing the association relation of the associated objects, which means that there may be three kinds of relations, for example, a and/or B, which may mean three kinds of relations of a alone, a and B together, and B alone.

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 transceiving unit 520, and specifically, the transceiving unit 520 is configured to send, to a target device in a case where the processing unit 510 executes a th procedure, indication information for indicating the target device to connect a terminal device to a third network device through a second procedure according to a preset condition, where the target device is the terminal device or a second network device, and the procedure includes that the terminal device connected to the network device 500 is connected to the second network device, and the second procedure includes that the terminal device connected to the second network device is connected to the third network device.

Optionally, as embodiments, the procedure includes that the terminal device connected with the network device 500 is connected to the second network device through redirection or handover, and/or the second procedure includes that the terminal device connected with the second network device is connected to the third network device through redirection or handover.

Optionally, as embodiments, the indication information includes an execution purpose of the procedure executed by the network device 500.

Optionally, as embodiments, the execution purpose is used for the target device to determine the corresponding preset condition.

Optionally, as embodiments, the preset condition includes that the terminal device is connected to the third network device through the second procedure at a preset time and/or a preset place.

Optionally, as embodiments, the target device is the terminal device, and the transceiver unit 520 is configured to send the indication information to the terminal device, where the indication information is used to indicate that the terminal device is connected to the third network device through the second procedure according to a preset condition.

Optionally, as embodiments, the transceiver 520 is configured to send the indication information to the second network device, the second network device is configured to send the indication information to the terminal device, and the procedure includes switching the terminal device connected to the network device 500 to connect to the second network device.

Optionally, as embodiments, the second procedure includes connecting to the third network device through a reselection mechanism after the terminal device connected to the second network device performs connection release to enter an idle state.

Optionally, as embodiments, the target device is the second network device, and the transceiver unit 520 is configured to, when the processing unit 510 executes the procedure, send the indication information to the second network device, where the indication information is used to indicate the second network device to connect the terminal device to the third network device through the second procedure according to a preset condition.

Optionally, the th procedure includes the end device connecting with the network device 500 switching to connecting with the second network device.

Optionally, as embodiments, the transceiver unit 520 is configured to send the indication information to the terminal device, and the terminal device is configured to send the indication information to the second network device.

Optionally, as embodiments, the second process includes that the terminal device connected to the second network device is connected to the third network device through handover.

Optionally, as embodiments, the transceiver unit 520 is configured to send an RRC connection release message or a handover request message to the terminal device, where the RRC connection release message or the handover request message includes the indication information.

Optionally, as embodiments, the transceiver unit 520 is configured to send the indication information to the second network device through a direct connection interface, or send the indication information to the second network device through a core network device.

Optionally, as embodiments, the network device 500 and the third network device satisfy at least conditions of corresponding to the same access schemes, corresponding to the same PLMNs, corresponding to the same core network types, and corresponding to the same network slice.

Optionally, as embodiments, at least two network devices in the network device 500, the second network device, and the third network device satisfy at least conditions of different core network types, different PLMNs, different network slices, and different access schemes.

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 th network device in each method in fig. 1 to 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, the network device 600 according to the embodiment of the present application includes a processing unit 610 and a transceiving unit 620, and specifically, the transceiving unit 620 is configured to receive indication information sent by a th network device in a case where an th procedure is executed, and the processing unit 610 is configured to connect a terminal device to a third network device through a second procedure according to the indication information and according to a preset condition, where the th procedure includes that the terminal device connected to the th network device is connected to the network device 600, and the second procedure includes that the terminal device connected to the network device 600 is connected to the third network device.

Optionally, as embodiments, the procedure includes that the terminal device connected with the th network device is connected to the network device 600 through redirection or handover, and/or the second procedure includes that the terminal device connected with the network device 600 is connected to the third network device through handover.

Optionally, as embodiments, the processing unit 610 is further configured to determine the preset condition corresponding to the execution purpose.

Optionally, as embodiments, the executing purpose is that the terminal device executes specific service on the network device 600.

Optionally, as embodiments, the preset condition includes that 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 location.

Optionally, as embodiments, the preset condition includes that the terminal device is connected to the third network device through the second procedure in case that the terminal device needs to execute the second specific service after the execution of the specific service on the network device 600 is finished.

Optionally, as embodiments, the transceiving unit 620 is configured to receive the indication information sent by the th network device through a direct connection interface or a core network device when the procedure is performed, where the procedure includes switching the terminal device connected to the th network device to be connected to the network device 600.

Optionally, as embodiments, the transceiving unit 620 is configured to, in case of performing the th procedure, receive the indication information sent by the terminal device, where the indication information is sent by the th network device in case of performing the th procedure.

Optionally, as embodiments, the transceiving unit 620 is configured to receive an RRC connection setup request message or a handover complete message sent by the terminal device in case of performing the procedure, where the RRC connection setup request message or the handover complete message includes the indication information.

Optionally, as embodiments, the network device and the third network device satisfy at least of the following conditions, which are equal to access standards, equal to PLMNs, equal to core network types, and equal to network slices.

Optionally, as embodiments, at least two of the network device, the network device 600, and the third network device satisfy at least of the following conditions, where the conditions correspond to different core network types, different PLMNs, different network slices, and different access schemes.

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 th network device is connected to the network device through redirection or switching, the th 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 transceiving unit 720, and specifically, the transceiving unit 720 is configured to receive indication information sent by a th network device in a case where an th procedure is performed, and the processing unit 710 is configured to connect to a third network device through a second procedure according to a preset condition according to the indication information, where the th procedure includes that the terminal device connected to the th network device is connected to the second network device, and the second procedure includes that the terminal device connected to the second network device is connected to the third network device.

Optionally, as an embodiment, the processing unit 710 is further configured to determine the preset condition corresponding to the execution purpose.

Optionally, as embodiments, the executing is to execute the specific service on the second network device by the terminal device.

Optionally, as embodiments, the transceiver 720 is configured to receive an RRC connection release message or a handover request message sent by the th network device when the procedure is performed, where the RRC connection release message or the handover request message includes the indication information.

Optionally, as embodiments, the transceiver 720 is configured to receive the indication information sent by the second network device when the -th procedure is performed, where the indication information is sent by the -th network device when the -th procedure is performed by the second network device, and the -th procedure includes switching the terminal device connected to the -th network device to connect to the second network device.

Optionally, as embodiments, at least two of the network device, the second network device, and the third network device satisfy at least of the following conditions, where the at least two network devices correspond to different core network types, different PLMNs, different network slices, and different access schemes.

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, in the terminal device according to the embodiment of the present application, in the process of changing from connection with the th network device to connection with the second network device through redirection or switching, the indication information sent by the th network device may be received, 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 5G terminal device 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, thereby ensuring user experience.

Fig. 8 is a schematic block diagram of communication devices 800 provided in this embodiment, the communication device 800 shown in fig. 8 includes a processor 810, and the processor 810 can call and run a computer program from a memory to implement the method in this embodiment.

Optionally, as shown in fig. 8, the communication device 800 may also include a 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 separate devices independent of the processor 810 or may be integrated into the processor 810.

Optionally, 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 further include antennas, and the number of the antennas may be or more.

Optionally, 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, which is not described herein again for brevity.

Optionally, the communication device 800 may specifically be a mobile terminal/terminal device according to this embodiment, and the communication device 800 may implement a corresponding process implemented by the mobile terminal/terminal device in each method according to this embodiment, which is not described herein again for brevity.

Fig. 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.

Optionally, as shown in fig. 9, the chip 900 may further include a 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 separate devices independent of the processor 910, or may be integrated into the processor 910.

Optionally, the chip 900 may further comprise 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.

Optionally, the chip 900 may further 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.

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

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

It should be understood that the 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 communication systems 1000 provided by the embodiment of the present application, and 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 network devices in the foregoing method, that is, the network device 1020 may be any network devices in the foregoing network device, the second network device, and the third network device, which are not described herein again for brevity.

The steps of the methods disclosed in connection with the embodiments of the present Application may be performed directly as hardware code execution processors, or may be performed using a combination of hardware and software modules within a microprocessor, a flash memory, a read-only memory, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Array (FPGA) or other Programmable logic devices, discrete , or a transistor logic device, discrete hardware components.

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 DRAM (SLDRAM), and direct memory bus 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 computer readable storage media for storing computer programs.

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

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

The embodiments of the present application also provide computer program products comprising computer program instructions.

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

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

The embodiment of the application also provides computer programs.

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

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

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

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

For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units into logical functional divisions may be realized in other ways, for example, multiple units or components may be combined or integrated into another systems, or features may be omitted or not executed, in another point, the shown or discussed coupling or direct coupling or communication connection between each other may be through interfaces, indirect coupling or communication connection between units or devices may be electrical, mechanical or other forms.

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, that is, may be located in places, or may also be distributed on multiple network units.

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

Based on the understanding, the technical solution of the present application, which is essentially or partially contributed to by the prior art, or the technical solution may be embodied in the form of a software product, which is stored in storage media and includes several instructions for causing computer devices (which may be personal computers, servers, or network devices) to execute all or part of the steps of the methods described in the embodiments of the present application.

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 network device sends indication information to the target device when executing procedure, the indication information is used for indicating the target device to connect the terminal device to the third network device through the second procedure according to the preset condition,

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

the th procedure includes the terminal device connected with the th network device being 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 th procedure comprises the end device connected to the th network device connecting to the second network device through redirection or handover, and/or wherein the terminal device is connected to the second network device through redirection or handover

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 comprises an execution purpose of the procedure executed by the network device.

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

5. The method according to claim 3 or 4, wherein the execution purpose is that the terminal device executes th specific service on the second network device.

6. The method of any of claims 1-5, wherein the indication information includes the preset condition.

7. The method of any of claims 1-6, wherein the preset conditions comprise:

and connecting the terminal equipment to the third network equipment through the second process at a preset time and/or a preset place.

8. The method of any of claims 1-6, wherein the preset conditions comprise:

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 th specific service on the second network device and/or the terminal device needs to execute the second specific service.

9. The method according to claim 5 or 8, wherein said th specific service includes at least of voice service, video service and emergency call service.

10. The method according to any of claims 1-9, wherein the target device is the terminal device,

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

and , the network device sends the indication information to the terminal device, and the indication information is used for indicating the terminal device to connect to the third network device through the second process according to preset conditions.

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

the th network device sends the indication information to the second network device, the second network device is used for sending the indication information to the terminal device, the process includes that the terminal device connected with the th network device is switched to be connected with the second network device.

12. The method according to claim 10 or 11, 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.

13. The method according to any of claims 1-9, wherein the target device is the second network device,

the network device sends indication information to the target device under the condition of executing process, including:

the network device sending the indication information to the second network device if the procedure is performed,

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.

14. The method of claim 13, wherein the th procedure comprises the end device connecting with the th network device switching to connecting with the second network device.

15. The method according to claim 13 or 14, wherein said sending the indication information to the second network device comprises:

the th network device sends the indication information to the terminal device, and the terminal device is configured to send the indication information to the second network device.

16. The method of , wherein the second process comprises the terminal device connected to the second network device connecting to the third network device through a handover.

17. The method according to claim 10 or 15, wherein the th network device sends the indication information to the terminal device, including:

the th network device sends a radio resource control, RRC, connection release message or handover request message to the terminal device, where the RRC connection release message or handover request message includes the indication information.

18. The method according to claim 11 or 14, wherein the network device sending the indication information to the second network device comprises:

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

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

19. The method of any of claims 1-18, wherein the network device and the third network device satisfy at least of the following conditions:

the method is applicable to access systems, public land mobile network PLMNs, core network types and network slices.

20. The method of any of claims 1-19, wherein at least two of the network device, the second network device, and the third network device satisfy at least 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.

21, a method for establishing a connection, comprising:

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

the second network equipment connects the terminal equipment to third network equipment through a second process according to the indication information and preset conditions,

wherein the th procedure includes the terminal device connected with the th network device being connected to the second network device, and the second procedure includes the terminal device connected with the second network device being connected to the third network device.

22. The method of claim 21, wherein the procedure comprises the end device connected to the network device connecting to the second network device through redirection or handover, and/or wherein the connection is made via a third network device

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

23. The method of claim 21 or 22, wherein the indication information comprises an execution purpose of the procedure executed by the network device.

24. The method of claim 23, further comprising:

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

25. The method according to claim 23 or 24, wherein the execution purpose is that the terminal device executes th specific service on the second network device.

26. The method of any of claims 21-25, wherein the indication information includes the preset condition.

27. The method of any of claims 21-26, wherein the preset conditions include:

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.

28. The method according to claim 27, wherein the preset conditions include:

29. The method according to claim 25 or 28, wherein said th specific service includes at least of voice service, video service and emergency call service.

30. The method according to of any of claims 21-29, wherein the second network device receiving indication information sent by a th network device in case of performing procedure comprises:

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

wherein the th procedure includes the terminal device connecting with the th network device switching to connecting with the second network device.

31. The method according to of any of claims 21-29, wherein the second network device receiving indication information sent by a th network device in case of performing procedure comprises:

the second network device receives the indication information sent by the terminal device when executing the th procedure, and the indication information is sent by the th network device when executing the th procedure.

32. The method of claim 31, wherein the receiving, by the second network device, the indication information sent by the terminal device when performing the th procedure comprises:

and under the condition that the second network device executes the th process, receiving a Radio Resource Control (RRC) connection establishment request message or a switching completion message sent by the terminal device, wherein the RRC connection establishment request message or the switching completion message comprises the indication information.

33. The method of any of claims 21-32, wherein the network device and the third network device satisfy at least of the following conditions:

34. The method of any of claims 21-33, wherein at least two of the network device, the second network device, and the third network device satisfy at least of the following conditions:

35, A method for establishing a connection, comprising:

the terminal equipment receives the indication information sent by the network equipment under the condition of executing the 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 th procedure includes the terminal device connected with the th network device being connected to a second network device, and the second procedure includes the terminal device connected with the second network device being connected to the third network device.

36. The method of claim 35, wherein the procedure comprises the end device connected to the network device connecting to the second network device through redirection or handover, and/or wherein the connection is made to the second network device through redirection or handover

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

37. The method of claim 35 or 36, wherein the indication information comprises an execution purpose of the procedure executed by the network device.

38. The method of claim 37, further comprising:

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

39. The method according to claim 37 or 38, wherein said executing is for the terminal device to execute th specific service on the second network device.

40. The method of , wherein the indication information comprises the preset condition.

41. The method of any of claims 35-40, wherein the preset conditions include:

and the terminal equipment is connected to the third network equipment through the second process at a preset time and/or a preset place.

42. The method according to claim 41, wherein the preset conditions comprise:

and after the terminal device finishes executing the th specific service on the second network device and/or in the 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.

43. The method according to claim 39 or 42, wherein said -specific services include at least of voice services, video services and emergency call services.

44. The method according to of any of claims 35 to 43, wherein the receiving, by the terminal device, the indication information sent by a th network device in case of performing a procedure comprises:

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

45. The method according to of any of claims 35 to 43, wherein the receiving, by the terminal device, the indication information sent by a th network device in case of performing a procedure comprises:

the terminal device receives the indication information sent by the second network device when executing the th process, the indication information is sent by the th network device when executing the th process, the th process includes switching the terminal device connected with the th network device to be connected with the second network device.

46. The method of any of claims 35-45, wherein the network device and the third network device satisfy at least of the following conditions:

47. The method of any of claims 35-46, wherein at least two of the network device, the second network device, and the third network device satisfy at least of the following conditions:

48, kinds of network equipment, which is characterized in that it comprises a processing unit and a transceiver unit,

the transceiver unit is configured to:

in a case where the processing unit executes the th procedure, sending indication information to a target device, the indication information being used for instructing the target device to connect a terminal device to a third network device through a second procedure according to a preset condition,

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

the th procedure includes the terminal device connected with the network device connecting to the second network device,

49. The network device of claim 48, wherein the th procedure comprises the end device connected to the network device connecting to the second network device through redirection or handover, and/or

50. The network device of claim 48 or 49, wherein the indication information comprises an execution purpose of the network device to execute the th procedure.

51. The network device of claim 50, wherein the execution purpose is for the target device to determine the corresponding preset condition.

52. The network device of claim 50 or 51, wherein the execution purpose is that the terminal device executes -specific services on the second network device.

53. The network device of any of claims 48-52, wherein the indication information includes the preset condition.

54. The network device of any of claims 48-53, wherein the preset conditions comprise:

55. The network device of any of claims 48-53, wherein the preset conditions comprise:

56. The network device according to claim 52 or 55, wherein said -specific services include at least of voice services, video services and emergency call services.

57. The network device of any , 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.

58. The network device of claim 57, wherein the transceiver unit is configured to:

and sending the indication information to the second network equipment, wherein the second network equipment is used for sending the indication information to the terminal equipment, and the process comprises the step of switching the terminal equipment connected with the network equipment to be connected with the second network equipment.

59. The network device of claim 57 or 58, wherein the second procedure 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.

60. The network device of any , 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 that the processing unit performs the th procedure,

61. The network device of claim 60, wherein the th procedure comprises the terminal device connecting with the network device switching to connecting with the second network device.

62. The network device of claim 60 or 61, 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.

63. The network device of any of claims 60-62, wherein the second procedure includes the terminal device connected to the second network device being connected to the third network device through a handover.

64. The network device of claim 57 or 62, 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.

65. The network device of claim 58 or 61, 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.

66. The network device of any of claims 48-65, wherein the network device and the third network device satisfy at least of the following conditions:

67. The network device of any of claims 48-66, wherein at least two of the network device, the second network device, and the third network device satisfy at least of the following conditions:

68. A network device, comprising:

a transceiving unit, configured to receive indication information transmitted by a th network device in case of performing an th procedure;

a processing unit, configured to connect the terminal device to a third network device through a second process according to the indication information and a preset condition,

wherein the th procedure includes the terminal device connected with the th network device being connected to the network device, and the second procedure includes the terminal device connected with the network device being connected to the third network device.

69. The network device of claim 68, wherein the th procedure comprises the end device connected to the th network device connecting to the network device through 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.

70. The network device of claim 68 or 69, wherein the indication information comprises an execution purpose of the procedure executed by the network device.

71. The network device of claim 70, wherein the processing unit is further configured to:

and determining the preset condition corresponding to the execution purpose.

72. The network device of claim 70 or 71, wherein the execution purpose is that the terminal device executes -specific services on the network device.

73. The network device of any of claims 68-72, wherein the indication information includes the preset condition.

74. The network device of any of claims 68-73, wherein the preset conditions comprise:

and the network equipment connects the terminal equipment to the third network equipment through the second process at preset time and/or preset place.

75. The network device of claim 74, wherein the preset condition comprises:

and connecting the terminal device to the third network device through the second process in the case that the terminal device needs to execute a second specific service after the terminal device finishes executing the th specific service on the network device and/or the terminal device needs to execute the second specific service.

76. The network device according to claim 72 or 75, wherein said -specific services include at least of voice services, video services and emergency call services.

77. The network device of any of claims 68-76, wherein the transceiver unit is configured to:

receiving the indication information sent by the th network device through a direct connection interface or a core network device in case of executing the th procedure,

wherein the th procedure includes the terminal device connected with the th network device switching to connect with the network device.

78. The network device of any of claims 68-76, wherein the transceiver unit is configured to:

receiving the indication information sent by the terminal device when the th procedure is executed, wherein the indication information is sent by the th network device when the th procedure is executed.

79. The network device of claim 78, wherein the transceiver unit is configured to:

in the case of performing the th procedure, a radio resource control RRC connection setup request message or a handover complete message sent by the terminal device is received, where the RRC connection setup request message or the handover complete message includes the indication information.

80. The network device of any of claims 68-79, wherein the network device and the third network device satisfy at least of the following conditions:

81. The network device of any of claims 68-80, wherein at least two of the network device, the network device, and the third network device satisfy at least of the following conditions:

82. terminal equipment, which is characterized in that the terminal equipment comprises 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 a preset condition,

83. The end device of claim 82, wherein the th procedure comprises the end device connected to the th network device connecting to the second network device through redirection or handover, and/or

84. The terminal device of claim 82 or 83, wherein the indication information comprises an execution purpose of the procedure executed by the network device.

85. The terminal device of claim 84, wherein the processing unit is further configured to:

and determining the preset condition corresponding to the execution purpose.

86. The terminal device according to claim 84 or 85, wherein said execution is for said terminal device to execute th specific services on said second network device.

87. The terminal device of any of claims 82-86, wherein the indication information includes the preset condition.

88. The terminal device of any of claims 82-87, wherein the preset conditions include:

89. The terminal device of claim 88, wherein the preset condition comprises:

90. The terminal device according to claim 86 or 89, wherein said -specific services include at least of voice services, video services and emergency call services.

91. The terminal device of any of claims 82-90, wherein the transceiver unit is configured to:

receiving a Radio Resource Control (RRC) connection release message or a handover request message transmitted by the network device in case of performing the procedure, the RRC connection release message or the handover request message including the indication information.

92. The terminal device of any of claims 82-90, wherein the transceiver unit is configured to:

under the condition of executing the th process, receiving the indication information sent by the second network device, wherein the indication information is sent by the th network device under the condition of executing the th process, and the th process comprises the step that the terminal device connected with the th network device is switched to be connected with the second network device.

93. The terminal device of any of claims 82-92, wherein the network device and the third network device satisfy at least of the following conditions:

94. The terminal device of any of claims 82-93, wherein at least two of the network device, the second network device, and the third network device satisfy at least of the following conditions:

95. A network device, comprising a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method for establishing a connection as claimed in any of claims 1 to 34, .

96. terminal device, comprising a processor and a memory for storing a computer program, the processor being adapted to invoke and execute the computer program stored in the memory to perform the method for establishing a connection according to any of claims 35 to 47, .

97, chip, characterized by comprising a processor for calling up and running a computer program from a memory, causing a device in which the chip is installed to perform a method for establishing a connection as claimed in any of claims 1 to 34, .

98. chip comprising a processor for calling up and running a computer program from a memory to cause a device on which the chip is installed to perform a method for establishing a connection as claimed in any of claims 35 to 47, .

99. a computer-readable storage medium for storing a computer program for causing a computer to perform the method for establishing a connection as claimed in any of claims 1 to 34 at .

A computer-readable storage medium 100, , for storing a computer program for causing a computer to perform the method for establishing a connection as claimed in any of claims 35 to 47.

A computer program product 101, , comprising computer program instructions for causing a computer to perform the method for establishing a connection as claimed in any of claims 1 to 34 at .

A computer program product 102, , comprising computer program instructions for causing a computer to perform the method for establishing a connection as claimed in any of claims 35 to 47 .

Computer program of any of claims 1 to 34, , characterized in that the computer program causes a computer to perform a method for establishing a connection as claimed in any of claims .

Computer program of 104, , characterized in that the computer program causes a computer to perform a method for establishing a connection as claimed in any of claims 35 to 47.