WO2019196011A1

WO2019196011A1 - Communication method and terminal, and network device

Info

Publication number: WO2019196011A1
Application number: PCT/CN2018/082524
Authority: WO
Inventors: 刘建华; 杨宁
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-04-10
Filing date: 2018-04-10
Publication date: 2019-10-17
Also published as: CN110710306B; CN110710306A

Abstract

The embodiments of the present invention provide a communication method and terminal, and a network device. The terminal of the embodiments of the present invention negotiates with the network device by way of reporting the terminal capability of the terminal, and confirms whether the terminal is allowed to perform at least one of a dual radio operation, a dual registration operation, and a dual connection operation. Thus, the technical problem that network switching between different types of core networks based on an N26 interface cannot be performed due to the terminal executing at least one of a dual radio operation, a dual registration operation, and a dual connection operation, can be effectively avoided, thereby improving the reliability of network switching between different types of core networks.

Description

Communication method and terminal, network device

Technical field

The present invention relates to wireless communication technologies, and in particular, to a communication method, a terminal, and a network device.

Background technique

With the rapid development of wireless network communication technology, wireless communication networks have gradually entered the 5G era. In the 5G era, the User Equipment (UE) can access the 5G core network, the Next Generation Core Network (NGCN), through the Next Generation-Radio Access Network (NG-RAN). The Evolved Universal Mobile Telecommunication System Territorial Radio Access Network (E-UTRAN) can also be used to access the 4G core network, the Evolved Packet Core Network (EPC). Currently, the N26 interface between the Access and Mobility Management Function (AMF) in the NGCN and the Mobility Management Entity (MME) in the EPC can be used to implement NGCN and EPC. Network switching.

However, in some cases, the terminal cannot perform network switching between the NGCN and the EPC based on the N26 interface. For example, the network switching based on the N26 interface is not supported, and no N26 interface or the N26 interface is faulty. The reliability of network switching between NGCN and EPC is reduced. The same problem exists with network switching between other different types of core networks.

Summary of the invention

Aspects of the present invention provide a communication method, a terminal, and a network device, which are used to improve the reliability of network switching between different types of core networks.

An aspect of the present invention provides a communication method, including:

Transmitting, by the terminal, the terminal capability of the terminal to the network device, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability;

Receiving, by the terminal, a behavior indication sent by the network device according to the terminal capability and the network capability of the network device, to indicate whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connectivity operation. item.

In another aspect of the present invention, another communication method is provided, including:

The network device receives the terminal capability of the terminal sent by the terminal, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability;

The network device sends a behavior indication to the terminal according to the terminal capability and the network capability of the network device, to indicate whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connection operation. item.

Receiving, by the terminal, a network switching indication sent by the first network device, to indicate that the network switching is performed;

If the terminal is in at least one of a dual wireless mode, a dual registration mode, and a dual connectivity mode, the terminal disconnects the connection between the terminal and the second network device;

The terminal performs a network switching operation to access the third network device.

In another aspect of the present invention, a terminal is provided, including:

a sending unit, configured to send, to the network device, a terminal capability of the terminal, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability;

a receiving unit, configured to receive, by the network device, a behavior indication sent according to the terminal capability and the network capability of the network device, to indicate whether the terminal is allowed to perform dual wireless operation, dual registration operation, and dual connectivity operation At least one.

Another aspect of the present invention provides a network device, including:

a receiving unit, configured to receive, by the terminal, a terminal capability of the terminal, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability;

a sending unit, configured to send, according to the terminal capability and a network capability of the network device, a behavior indication to the terminal, to indicate whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connectivity operation. .

In another aspect of the present invention, another terminal is provided, including:

a receiving unit, configured to receive a network switching indication sent by the first network device, to indicate that network switching is performed;

a connecting unit, configured to disconnect the terminal and the second network device if the terminal is in at least one of a dual wireless mode, a dual registration mode, and a dual connectivity mode;

The operating unit is configured to perform a network switching operation to access the third network device.

According to the foregoing technical solution, on the one hand, the terminal in the embodiment of the present invention negotiates with the network device by reporting the terminal capability of the terminal, and confirms whether the terminal is allowed to perform at least two of a dual wireless operation, a dual registration operation, and a dual connection operation. The technical problem that the network switching between different types of core networks based on the N26 interface cannot be performed due to at least one of the dual wireless operation, the dual registration operation, and the dual connection operation performed by the terminal is effectively avoided, thereby improving the technical problem. The reliability of network switching between different types of core networks.

According to the foregoing technical solution, on the other hand, the embodiment of the present invention receives, in a terminal in at least one of the dual wireless mode, the dual registration mode, and the dual connectivity mode, a network that is sent by the first network device to indicate that network switching is performed. After the handover indication, the terminal disconnects the connection between the terminal and the second network device, so that the terminal can perform a network handover operation to access the third network device, which can effectively prevent the terminal from being in the dual wireless mode. The technical problem of network switching between different types of core networks based on the N26 interface caused by at least one of the dual registration mode and the dual connectivity mode, thereby improving the reliability of network switching between different types of core networks.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art in light of the inventive workability.

FIG. 1 is a schematic flowchart of a communication method according to an embodiment of the present invention;

2 is a schematic flowchart of another communication method according to another embodiment of the present invention;

3 is a schematic flowchart of another communication method according to another embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of an access network device according to another embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another terminal according to another embodiment of the present disclosure;

7 is a schematic diagram of a network architecture of a dual wireless mode;

8 is a schematic diagram of a network architecture of a dual registration mode;

9 is a schematic diagram of a network architecture of a dual connectivity mode;

10 is a schematic diagram of a network architecture of a single wireless mode;

11 is a schematic diagram of a network architecture of a single registration mode;

FIG. 12 is a schematic diagram of a network architecture in a single connection mode.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In addition, the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist at the same time. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

FIG. 1 is a schematic flowchart of a communication method according to an embodiment of the present invention, as shown in FIG. 1.

The terminal sends the terminal capability of the terminal to the network device, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability.

The terminal receives the behavior indication sent by the network device according to the terminal capability and the network capability of the network device, to indicate whether the terminal is allowed to perform dual wireless operation, dual registration operation, and dual connectivity operation. At least one.

It should be noted that the network device involved in the present invention may be an access network device, for example, an Evolved NodeB (eNB) in an E-UTRAN or a 5G base station in a NG-RAN, that is, a gNB, or the like, or It can also be a mobility management device, for example, an Access and Mobility Management Function (AMF) in the NGCN or a Mobility Management Entity (MME) in the EPC, etc., this embodiment is This is not particularly limited.

The core idea of the present invention is that the terminal negotiates with the network device by reporting the terminal capability of the terminal, and confirms whether the terminal is allowed to perform at least one of dual wireless operation, dual registration operation, and dual connection operation, which can effectively avoid The technical problem that the network switching between different types of core networks based on the N26 interface cannot be performed due to the terminal performing at least one of the dual wireless operation, the dual registration operation, and the dual connection operation, thereby improving the relationship between different types of core networks The reliability of network switching.

It should be noted that this embodiment may be applicable to network switching between different types of core networks, for example, network switching from a 5G core network NGCN to a 4G core network EPC, or, for example, from a 4G core network EPC to a 5G core. The network switching of the network NGCN, or the network switching from the 5G core network NGCN to the 3G core network, is not specifically limited in this embodiment.

The so-called dual wireless capability refers to the ability of the terminal to perform dual wireless operation into the dual wireless mode. The dual wireless mode means that the terminal can respectively connect two types of radio access networks, namely the radio access network 1 and the radio access network 2, through two radio frequency units, namely, radio frequency unit 1 and radio frequency unit 2, as shown in FIG. 7 . Show. Each of the two types of radio access networks may be connected to one type of core network, or may be connected to the same core network. This embodiment does not specifically limit this. For example, the terminal can connect the NG-RAN and the E-UTRAN through two radio units respectively.

The so-called dual registration capability refers to the ability of the terminal to perform a dual registration operation to enter the dual registration mode. The dual registration mode means that the terminal can simultaneously connect two types of radio access networks, namely, the radio access network 1 and the radio access network 2, and each of the two types of radio access networks are respectively connected. A type of core network, as shown in Figure 8. The terminal can connect to the two types of radio access networks through one radio frequency unit or through two radio frequency units. For example, the terminal can access the 5G core network, that is, the NGCN through the NG-RAN, and can also access the 4G core network, that is, the EPC, through the E-UTRAN.

The so-called dual connectivity capability refers to the ability of the terminal to perform dual connectivity operations into dual connectivity mode. The dual connection mode means that the terminal can simultaneously connect two types of radio access networks, namely, the radio access network 1 and the radio access network 2, and each of the two types of radio access networks is connected with the same A core network, as shown in Figure 9. The terminal can connect to the two types of radio access networks through one radio frequency unit or through two radio frequency units. For example, the terminal can access the 5G core network, that is, the NGCN through the NG-RAN and the E-UTRAN, or can also access the 4G core network, that is, the EPC, through the NG-RAN and the E-UTRAN.

The voice service may include services corresponding to the two bearer mechanisms, one is a session type service carried by a Circuit Switched (CS) domain, and the other is a session type service carried by a Packet Switched (PS) domain. Also known as the Voice over Internet Protocol (VoIP) service. The terminal and the network device can perform CS domain handover, and switch the voice service from the PS domain to the CS domain for bearer.

The so-called CS domain switching capability refers to the ability of a terminal to switch voice services from a Packet Switched (PS) domain to a Circuit Switched (CS) domain for bearer. For example, the terminal can switch the voice service from the PS domain of the 5G core network, that is, the NGCN to the CS domain of the 3G core network.

It should be noted that the CS domain handover involved in the present invention refers to network handover from the PS domain to the CS domain.

Optionally, in a possible implementation manner of this embodiment, in 101, the terminal may specifically send the location to the network device by using at least one of a registration request message, an attach request message, and a location update message. The terminal capability is not specifically limited in this embodiment.

The registration request message may include, but is not limited to, at least one of the following types of registration request messages:

Initial registration type;

Update the registration type;

Type of emergency business.

Optionally, in a possible implementation manner of this embodiment, in 102, the behavior indication received by the terminal may include, but is not limited to, at least one of the following indications:

Whether to allow operation instructions for dual wireless operation;

Whether to allow operation instructions for dual registration operations;

Whether to allow the operation indication of the dual connection operation;

Whether a network switching indication supporting CS domain switching is required;

Whether a network switching indication based on the N26 interface is required;

Whether to support network switching instructions that are not based on the N26 interface.

Optionally, in a possible implementation manner of this embodiment, after the network device receives the terminal capability sent by the terminal, the network device may be configured according to the terminal capability and the network capability of the network device. The terminal sends a behavior indication.

The network capability of the network device may include, but is not limited to, at least one of a core network capability and a radio access network capability, which is not specifically limited in this embodiment. For example, whether the core network element supports CS domain handover; or, for example, whether the frequency and parameter configuration of the radio access network supports CS domain handover, and the like.

In this implementation manner, after receiving the terminal capability sent by the terminal, the network device may perform capability matching between the terminal and the network device according to the terminal capability and the network capability of the network device. If the capability matches, indicating that the terminal can be allowed to perform CS domain handover, the network device may send, but is not limited to, at least one of the following indications to the terminal:

Operation instructions for dual wireless operation are not allowed;

Operation instructions for double registration operations are not allowed;

Operation instructions for dual connection operations are not allowed;

A network switching indication that supports CS domain switching is required;

Need to perform network switching instructions based on the N26 interface;

Network switching indications that are not based on the N26 interface are not supported.

In this implementation manner, after receiving the terminal capability sent by the terminal, the network device may perform the capability matching between the terminal and the network device according to the terminal capability and the network capability of the network device, and if the capability matching fails, The terminal may not be allowed to perform CS domain handover, and then the network device may send, but is not limited to, at least one of the following indications to the terminal:

An operation instruction that allows dual wireless operation;

An operation instruction that allows dual registration operations;

An operational indication that allows dual connectivity operations;

There is no need to support network switching indications for CS domain handover;

No network switching indication based on the N26 interface is required;

In a specific implementation process, the network device may further be based on, but not limited to, at least one of user subscription information, user policy, and network real-time status, in addition to the terminal capability and the network capability of the network device. Item, sending a behavior indication to the terminal.

Optionally, in a possible implementation manner of this embodiment, in 102, the terminal may specifically receive the network device by using a registration reply message, an attach reply message, a location update reply message, and a non-access layer (Non The at least one of the -Access-Stratum (NAS) transmission messages, the behavior indication sent, is not specifically limited in this embodiment.

The registration reply message may include, but is not limited to, at least one of the following types of registration reply messages:

Initial registration type;

Update the registration type;

Type of emergency business.

In this embodiment, the terminal negotiates with the network device by reporting the terminal capability of the terminal, and confirms whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connection operation, which can effectively avoid the terminal. The technical problem of failing to perform network switching between different types of core networks based on the N26 interface caused by performing at least one of dual wireless operation, dual registration operation, and dual connection operation, thereby improving the network between different types of core networks The reliability of the switch.

2 is a schematic flowchart of another communication method according to another embodiment of the present invention, as shown in FIG. 2 .

The network device receives the terminal capability of the terminal sent by the terminal, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability.

202. The network device sends a behavior indication to the terminal according to the terminal capability and the network capability of the network device, to indicate whether the terminal is allowed to perform dual wireless operation, dual registration operation, and dual connectivity operation. At least one.

Optionally, in a possible implementation manner of this embodiment, in 201, the network device may specifically receive, by using, the terminal, by using at least one of a registration request message, an attach request message, and a location update message. The terminal capability is not specifically limited in this embodiment.

Initial registration type;

Update the registration type;

Type of emergency business.

Optionally, in a possible implementation manner of this embodiment, in 202, the behavior indication sent by the network device may include, but is not limited to, at least one of the following indications:

Whether to allow operation instructions for dual wireless operation;

Whether to allow operation instructions for dual registration operations;

Whether to allow the operation indication of the dual connection operation;

Whether a network switching indication based on the N26 interface is required;

Operation instructions for dual wireless operation are not allowed;

Operation instructions for double registration operations are not allowed;

Operation instructions for dual connection operations are not allowed;

A network switching indication that supports CS domain switching is required;

Need to perform network switching instructions based on the N26 interface;

An operation instruction that allows dual wireless operation;

An operation instruction that allows dual registration operations;

An operational indication that allows dual connectivity operations;

No network switching indication based on the N26 interface is required;

Optionally, in a possible implementation manner of the embodiment, in 202, the network device may specifically register a reply message, attach a reply message, and a location according to the terminal capability and the network capability of the network device. And updating the response message, the at least one of the non-access stratum (NAS) transmission message, and sending the behavior indication to the terminal, which is not specifically limited in this embodiment.

Initial registration type;

Update the registration type;

Type of emergency business.

FIG. 3 is a schematic flowchart of another communication method according to another embodiment of the present invention, as shown in FIG. 3.

301. The terminal receives a network switching indication sent by the first network device, to indicate that network switching is performed.

302. If the terminal is in at least one of a dual wireless mode, a dual registration mode, and a dual connectivity mode, the terminal disconnects the terminal and the second network device.

303. The terminal performs a network switching operation to access a third network device.

It should be noted that the first network device, the second network device, or the third network device involved in the present invention may be an access network device, for example, an Evolved NodeB (eNB) in E-UTRAN or The 5G base station in the NG-RAN is a gNB or the like, or may also be a mobility management device, for example, an Access and Mobility Management Function (AMF) in the NGCN or a mobility management entity in the EPC ( The Mobility Management Entity, MME, and the like are not particularly limited in this embodiment.

The core network corresponding to the third network device may be the same as the core network corresponding to the second network device, or may not be the same in this embodiment.

The core idea of the present invention is that after the terminal in at least one of the dual wireless mode, the dual registration mode, and the dual connectivity mode receives the network handover indication sent by the first network device to indicate that the network handover is performed, the terminal By disconnecting the connection between the terminal and the second network device, the terminal can perform a network switching operation to access the third network device, which can effectively avoid the terminal being in the dual wireless mode, the dual registration mode, and the dual connectivity mode. The technical problem of network switching between different types of core networks based on the N26 interface cannot be performed due to at least one of the foregoing, thereby improving the reliability of network switching between different types of core networks.

The so-called dual wireless mode means that the terminal can respectively connect two types of radio access networks, namely the radio access network 1 and the radio access network 2, through two radio frequency units, namely, radio frequency unit 1 and radio frequency unit 2, as shown in the figure. 7 is shown. Each of the two types of radio access networks may be connected to one type of core network, or may be connected to the same core network. This embodiment does not specifically limit this. For example, the terminal can connect the NG-RAN and the E-UTRAN through two radio units respectively.

The so-called dual registration mode means that the terminal can simultaneously connect two types of radio access networks, namely, the radio access network 1 and the radio access network 2, and each of the two types of radio access networks Connect one type of core network separately, as shown in Figure 8. The terminal can connect to the two types of radio access networks through one radio frequency unit or through two radio frequency units. For example, the terminal can access the 5G core network, that is, the NGCN through the NG-RAN, and can also access the 4G core network, that is, the EPC, through the E-UTRAN.

The so-called dual connectivity mode means that the terminal can simultaneously connect two types of radio access networks, namely, the radio access network 1 and the radio access network 2, and each of the two types of radio access networks Connect to the same core network, as shown in Figure 9. The terminal can connect to the two types of radio access networks through one radio frequency unit or through two radio frequency units. For example, the terminal can access the 5G core network, that is, the NGCN through the NG-RAN and the E-UTRAN, or can also access the 4G core network, that is, the EPC, through the NG-RAN and the E-UTRAN.

Optionally, in a possible implementation manner of this embodiment, after the terminal 102, the terminal may further send the indication information to the second network device, to indicate that the terminal and the second network device are disconnected. The connection between the users or the user context of the terminal on the second network device is pending.

In this way, the second network device may disconnect the connection between the terminal and the second network device according to the indication information, or suspend a user context of the terminal on the second network device, To enter at least one of a single wireless mode, a single registration mode, and a single connection mode.

The so-called single wireless mode means that the terminal can only connect to one wireless access network, as shown in FIG. The wireless access network may be connected to two types of core networks, or may be connected to the same core network. This embodiment does not specifically limit this. The terminal may connect to the radio access network through one radio unit or through two radio units. For example, the terminal can connect to the NG-RAN or can also connect to the E-UTRAN.

The so-called single registration mode means that the terminal can only connect to one radio access network, and the radio access network is connected to a core network, as shown in FIG. The terminal may connect to the radio access network through one radio unit or through two radio units. For example, the terminal can access the 5G core network, that is, the NGCN through the NG-RAN, or can also access the 4G core network, that is, the EPC, through the E-UTRAN.

The so-called single connection mode means that the terminal can only connect to one radio access network, and the radio access network is connected to a core network, as shown in FIG. The terminal may connect to the radio access network through one radio unit or through two radio units. For example, the terminal can access the 5G core network, that is, the NGCN through the NG-RAN, or can also access the 4G core network, that is, the EPC, through the E-UTRAN.

In a specific implementation process, if the terminal is in at least one of a dual radio mode and a dual connectivity mode, the terminal may transmit the message to the second network device by using a message transmitted by the access layer. .

In another specific implementation process, if the terminal is in the dual registration mode, the terminal may specifically send the indication information to the second network device by using a NAS to transmit a message.

Optionally, in a possible implementation manner of this embodiment, the network switching may include, but is not limited to, the following network switching:

Network switching between NGCN and EPC based on the N26 interface; or

CS domain switching.

In this embodiment, after the terminal in at least one of the dual wireless mode, the dual registration mode, and the dual connectivity mode receives the network switching indication sent by the first network device to indicate that the network switching is performed, the terminal passes the disconnection. Opening a connection between the terminal and the second network device, so that the terminal can perform a network switching operation to access the third network device, which can effectively avoid the terminal being in the dual wireless mode, the dual registration mode, and the dual connectivity mode. The technical problem of network switching between different types of core networks based on the N26 interface cannot be performed due to at least one item, thereby improving the reliability of network switching between different types of core networks.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

FIG. 4 is a schematic structural diagram of a terminal according to another embodiment of the present invention, as shown in FIG. 4 . The terminal of this embodiment may include a transmitting unit 41 and a receiving unit 42. The sending unit 41 is configured to send, to the network device, a terminal capability of the terminal, where the terminal capability includes at least one of a dual wireless capability, a dual registration capability, a dual connectivity capability, and a CS domain handover capability; and the receiving unit 42 is configured to: And receiving, by the network device, a behavior indication sent according to the terminal capability and the network capability of the network device, to indicate whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connectivity operation.

The so-called CS domain switching capability refers to the ability of a terminal to switch voice services from a Packet Switched (PS) domain to a Circuit Switched (CS) domain for bearer. For example, the terminal can carry the voice service from the 5G core network, that is, the PS domain of the NGCN to the CS domain of the 3G core network.

Optionally, in a possible implementation manner of the embodiment, the sending unit 41 is specifically configured to send, by using at least one of a registration request message, an attach request message, and a location update message, to the network device. The terminal capability is not specifically limited in this embodiment.

Initial registration type;

Update the registration type;

Type of emergency business.

Optionally, in a possible implementation manner of the embodiment, the behavior indication received by the receiving unit 41 may include, but is not limited to, at least one of the following indications:

Whether to allow the operation indication of the DR operation;

Whether to allow the operation indication of the dual connection operation;

Whether a network switching indication based on the N26 interface is required;

Optionally, in a possible implementation manner of the embodiment, the receiving unit 42 is specifically configured to receive, by the network device, at least one of a registration reply message, an attach reply message, a location update reply message, and a NAS transmission message. The behavior indication that is sent is not specifically limited in this embodiment.

Initial registration type;

Update the registration type;

Type of emergency business.

It should be noted that the function of the terminal in the embodiment corresponding to FIG. 1 can be implemented by the terminal provided in this embodiment. For details, refer to related content in the embodiment corresponding to FIG. 1, and details are not described herein again.

In this embodiment, by negotiating with the network device in a manner of reporting the terminal capability of the terminal, it is confirmed whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connection operation, which can effectively avoid execution by the terminal. Technical problems of network switching between different types of core networks based on the N26 interface caused by at least one of dual wireless operation, dual registration operation, and dual connection operation, thereby improving network switching between different types of core networks Reliability.

FIG. 5 is a schematic structural diagram of a network device according to another embodiment of the present invention, as shown in FIG. 5. The network device of this embodiment may include a receiving unit 51 and a transmitting unit 52. The receiving unit 51 is configured to receive, by the terminal, a terminal capability of the terminal, where the terminal capability includes at least one of a dual radio capability, a dual registration capability, a dual connectivity capability, and a CS domain handover capability; and a sending unit 52, And configured to send, according to the terminal capability and the network capability of the network device, a behavior indication to the terminal, to indicate whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connectivity operation.

Optionally, in a possible implementation manner of this embodiment, the receiving unit is specifically configured to receive, by the terminal, the terminal capability that is sent by using at least one of a registration request message, an attach request message, and a location update message. This embodiment is not particularly limited.

Initial registration type;

Update the registration type;

Type of emergency business.

Optionally, in a possible implementation manner of this embodiment, the behavior indication sent by the sending unit may include, but is not limited to, at least one of the following indications:

Whether to allow the operation indication of the DR operation;

Whether to allow the operation indication of the dual connection operation;

Whether a network switching indication based on the N26 interface is required;

Optionally, in a possible implementation manner of the embodiment, the sending unit 52 is specifically configured to: according to the terminal capability and the network capability of the network device, by using a registration reply message, an attach reply message, and a location update. The at least one of the reply message and the NAS transport message is sent to the terminal, and the behavior is not specifically limited in this embodiment.

Initial registration type;

Update the registration type;

Type of emergency business.

It should be noted that the function of the network device in the embodiment corresponding to FIG. 2 can be implemented by the network device provided in this embodiment. For details, refer to related content in the embodiment corresponding to FIG. 2, and details are not described herein again.

FIG. 6 is a schematic structural diagram of another terminal according to another embodiment of the present invention, as shown in FIG. 6. The terminal of this embodiment may include a receiving unit 61, a connecting unit 62, and an operating unit 63. The receiving unit 61 is configured to receive a network switching indication sent by the first network device, to indicate that network switching is performed, and the connecting unit 62 is configured to: if the terminal is in at least one of a dual wireless mode, a dual registration mode, and a dual connectivity mode. And disconnecting the connection between the terminal and the second network device; and the operating unit 63 is configured to perform a network switching operation to access the third network device.

The core idea of the present invention is that after the receiving unit of the terminal in at least one of the dual wireless mode, the dual registration mode, and the dual connectivity mode receives the network switching indication sent by the first network device to indicate that the network switching is performed, The connecting unit can disconnect the connection between the terminal and the second network device, so that the operating unit can perform a network switching operation to access the third network device, which can effectively avoid the terminal being in the dual wireless mode, the dual registration mode, and the dual connection The technical problem of network switching between different types of core networks based on the N26 interface cannot be performed due to at least one of the modes, thereby improving the reliability of network switching between different types of core networks.

Optionally, in a possible implementation manner of the embodiment, the connecting unit may be further configured to send, to the second network device, indication information, to indicate that the terminal and the second network device are disconnected. The connection between the user context of the terminal on the second network device is suspended or suspended.

The so-called single wireless mode means that the terminal can only connect to one wireless access network. The wireless access network may be connected to two types of core networks, or may be connected to the same core network. This embodiment does not specifically limit this. The terminal may connect to the radio access network through one radio unit or through two radio units. For example, the terminal can connect to the NG-RAN or can also connect to the E-UTRAN.

The so-called single registration mode means that the terminal can only connect to one radio access network, and the radio access network is connected to a core network. The terminal may connect to the radio access network through one radio unit or through two radio units. For example, the terminal can access the 5G core network, that is, the NGCN through the NG-RAN, or can also access the 4G core network, that is, the EPC, through the E-UTRAN.

The so-called single connection mode means that the terminal can only connect to one radio access network, and the radio access network is connected to a core network. The terminal may connect to the radio access network through one radio unit or through two radio units. For example, the terminal can access the 5G core network, that is, the NGCN through the NG-RAN, or can also access the 4G core network, that is, the EPC, through the E-UTRAN.

In a specific implementation process, the connecting unit is specifically configured to send, by using an access layer, a message to the second network device if the terminal is in at least one of a dual radio mode and a dual connectivity mode. The indication information; or if the terminal is in the dual registration mode, transmitting the message to the second network device by using the NAS to transmit the message.

Network switching between NGCN and EPC based on the N26 interface; or

CS domain switching.

It should be noted that the function of the terminal in the embodiment corresponding to FIG. 3 can be implemented by the terminal provided in this embodiment. For details, refer to related content in the embodiment corresponding to FIG. 3, and details are not described herein again.

In this embodiment, after the receiving unit of the terminal in at least one of the dual wireless mode, the dual registration mode, and the dual connectivity mode receives the network switching indication sent by the first network device to indicate that the network switching is performed, the connecting unit By disconnecting the connection between the terminal and the second network device, the operating unit can perform a network switching operation to access the third network device, which can effectively avoid the terminal being in the dual wireless mode, the dual registration mode, and the dual connectivity mode. The technical problem of network switching between different types of core networks based on the N26 interface cannot be performed due to at least one of the following, thereby improving the reliability of network switching between different types of core networks.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present invention, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A communication method, comprising:

Transmitting, by the terminal, the terminal capability of the terminal to the network device, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability;

Receiving, by the terminal, a behavior indication sent by the network device according to the terminal capability and the network capability of the network device, to indicate whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connectivity operation. item.
The method of claim 1 wherein the behavior indication comprises at least one of the following indications:

Whether to allow operation instructions for dual wireless operation;

Whether to allow operation instructions for dual registration operations;

Whether to allow the operation indication of the dual connection operation;

Whether a network switching indication supporting CS domain switching is required;

Whether a network switching indication based on the N26 interface is required;

Whether to support network switching instructions that are not based on the N26 interface.
The method according to claim 1, wherein the terminal sends the terminal capability of the terminal to the network device, including:

The terminal sends the terminal capability to the network device by using at least one of a registration request message, an attach request message, and a location update message.
The method according to any one of claims 1 to 3, wherein the terminal receives the behavior indication sent by the network device according to the terminal capability and the network capability of the network device, including:

The terminal receives the behavior indication sent by the network device by using at least one of a registration reply message, an attach reply message, a location update reply message, and a NAS transmission message.
A communication method, comprising:

The network device receives the terminal capability of the terminal sent by the terminal, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability;

The network device sends a behavior indication to the terminal according to the terminal capability and the network capability of the network device, to indicate whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connection operation. item.
The method of claim 5 wherein the behavior indication comprises at least one of the following indications:

Whether to allow operation instructions for dual wireless operation;

Whether to allow operation instructions for dual registration operations;

Whether to allow the operation indication of the dual connection operation;

Whether a network switching indication supporting CS domain switching is required;

Whether a network switching indication based on the N26 interface is required;

Whether to support network switching instructions that are not based on the N26 interface.
The method according to claim 5, wherein the receiving, by the network device, the terminal capability of the terminal sent by the terminal comprises:

The network device receives the terminal capability that is sent by the terminal by using at least one of a registration request message, an attach request message, and a location update message.
The method according to any one of claims 5 to 7, wherein the network device sends a behavior indication to the terminal according to the terminal capability and the network capability of the network device, including:

And the network device sends the behavior indication to the terminal by using at least one of a registration reply message, an attach reply message, a location update reply message, and a NAS transmission message according to the terminal capability and the network capability of the network device.
A communication method, comprising:

Receiving, by the terminal, a network switching indication sent by the first network device, to indicate that the network switching is performed;

If the terminal is in at least one of a dual wireless mode, a dual registration mode, and a dual connectivity mode, the terminal disconnects the connection between the terminal and the second network device;

The terminal performs a network switching operation to access the third network device.
The method according to claim 9, wherein the terminal disconnects the terminal and the second network device if the terminal is in at least one of a dual wireless mode, a dual registration mode, and a dual connectivity mode After the connection to enter at least one of the single wireless mode and the single registration mode, the following also includes:

The terminal sends the indication information to the second network device to indicate that the connection between the terminal and the second network device is disconnected or the user context of the terminal on the second network device is suspended.
The method according to claim 10, wherein the sending, by the terminal, the indication information to the second network device comprises:

If the terminal is in at least one of a dual radio mode and a dual connectivity mode, the terminal transmits the message to the second network device by using an access layer to transmit a message; or

If the terminal is in the dual registration mode, the terminal transmits the indication information to the second network device by using a NAS to transmit a message.
The method according to claim 9, wherein the core network corresponding to the third network device is the same as or different from the core network corresponding to the second network device.
The method according to any one of claims 9 to 12, wherein the network switching comprises:

Network switching between NGCN and EPC based on the N26 interface; or

CS domain switching.
A terminal, comprising:

a sending unit, configured to send, to the network device, a terminal capability of the terminal, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability;

a receiving unit, configured to receive, by the network device, a behavior indication sent according to the terminal capability and the network capability of the network device, to indicate whether the terminal is allowed to perform dual wireless operation, dual registration operation, and dual connectivity operation At least one.
The terminal of claim 14, wherein the behavior indication comprises at least one of the following indications:

Whether to allow operation instructions for dual wireless operation;

Whether to allow operation instructions for dual registration operations;

Whether to allow the operation indication of the dual connection operation;

Whether a network switching indication supporting CS domain switching is required;

Whether a network switching indication based on the N26 interface is required;

Whether to support network switching instructions that are not based on the N26 interface.
The terminal according to claim 14, wherein the sending unit is specifically configured to

The terminal capability is transmitted to the network device by at least one of a registration request message, an attach request message, and a location update message.
The terminal according to any one of claims 14 to 16, wherein the receiving unit is specifically configured to:

Receiving, by the network device, the behavior indication sent by at least one of a registration reply message, an attach reply message, a location update reply message, and a NAS transmission message.
A network device, comprising:

a receiving unit, configured to receive, by the terminal, a terminal capability of the terminal, where the terminal capability includes at least one of dual wireless capability, dual registration capability, dual connectivity capability, and CS domain handover capability;

a sending unit, configured to send, according to the terminal capability and a network capability of the network device, a behavior indication to the terminal, to indicate whether the terminal is allowed to perform at least one of a dual wireless operation, a dual registration operation, and a dual connectivity operation. .
The network device of claim 18, wherein the behavior indication comprises at least one of the following indications:

Whether to allow operation instructions for dual wireless operation;

Whether to allow operation instructions for dual registration operations;

Whether to allow the operation indication of the dual connection operation;

Whether a network switching indication supporting CS domain switching is required;

Whether a network switching indication based on the N26 interface is required;

Whether to support network switching instructions that are not based on the N26 interface.
The network device according to claim 18, wherein the receiving unit is specifically configured to:

And receiving, by the terminal, the terminal capability by using at least one of a registration request message, an attach request message, and a location update message.
The network device according to any one of claims 18 to 20, wherein the sending unit is specifically configured to:

And transmitting, according to the terminal capability and the network capability of the network device, the behavior indication to the terminal by using at least one of a registration reply message, an attach reply message, a location update reply message, and a NAS transmission message.
A terminal, comprising:

a receiving unit, configured to receive a network switching indication sent by the first network device, to indicate that network switching is performed;

a connecting unit, configured to disconnect the terminal and the second network device if the terminal is in at least one of a dual wireless mode, a dual registration mode, and a dual connectivity mode;

The operating unit is configured to perform a network switching operation to access the third network device.
The terminal according to claim 22, wherein said connecting unit is further used for

And transmitting, to the second network device, indication information, to indicate disconnecting the terminal and the second network device, or suspending a user context of the terminal on the second network device.
The terminal according to claim 23, wherein the connecting unit is specifically configured to

And if the terminal is in at least one of a dual wireless mode and a dual connectivity mode, transmitting, by using an access layer, the indication information to the second network device; or

If the terminal is in the dual registration mode, the indication information is sent to the second network device by using a NAS to transmit a message.
The terminal according to claim 22, wherein the core network corresponding to the third network device is the same as or different from the core network corresponding to the second network device.
The terminal according to any one of claims 22 to 25, wherein the network switching comprises:

Network switching between NGCN and EPC based on the N26 interface; or

CS domain switching.