CN110049578B

CN110049578B - Wireless connection modification method, device and system

Info

Publication number: CN110049578B
Application number: CN201810048059.6A
Authority: CN
Inventors: 李岩; 权威; 李永翠; 唐廷芳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-01-17
Filing date: 2018-01-17
Publication date: 2021-08-03
Anticipated expiration: 2038-01-17
Also published as: CN110049578A; WO2019141031A1

Abstract

The embodiment of the application provides a wireless connection modification method, equipment and a system, wherein the method comprises the following steps: receiving, from a terminal device, identification information of a second network for a radio access network node serving a first network and the second network; and the wireless access network node modifies the wireless resource control connection between the wireless access network node and the terminal equipment according to the identification information of the second network, and the modified wireless resource control connection is used for signaling transmission of the second network. By adopting the scheme, when the AMF network element of the first network determines that the terminal equipment does not sign the service of the first network, the terminal equipment does not release the RRC connection between the terminal equipment and the radio access network node, but modifies the RRC connection between the terminal equipment and the radio access network node, so that the RRC connection is suitable for the signaling transmission of the second network, and the extra signaling overhead caused by reestablishment after the RRC connection is released is reduced.

Description

Wireless connection modification method, device and system

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, a device, and a system for modifying a wireless connection.

Background

In the 4th Generation mobile communication (4G) system, a Radio Access Network (RAN) is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) for accessing to a 4G core Network. In the 5th Generation mobile communication (5G) system, a radio access network is composed of a 3rd Generation Partnership Project (3 GPP) access network and/or a non-3rd Generation Partnership Project (non-3 GPP) access network and is connected to a 5G core network. Wherein, the next generation radio access network (NG-RAN) includes but is not limited to an independent new radio access (standby new radio), an independent E-UTRAN and other access networks; the non-3GPP Access network includes, but is not limited to, a Wireless Fidelity Access point (WiFi AP), a worldwide Interoperability for Microwave Access Base Station (WiMAX BS), and other Access networks. Therefore, the E-UTRAN can simultaneously connect the 5G core network and the 4G core network.

In one scenario, if a terminal device desires to access a 5G core network through an E-UTRAN, and actually the terminal device does not subscribe to a 5G service, the 5G core network may determine that the terminal device does not have the 5G subscription service, thereby causing a registration failure of the terminal device in the 5G core network. At this time, the ue releases the Radio Resource Control (RRC) connection between the ue and the E-UTRAN, which is already established for the 5G service. If the terminal device wants to re-access to the subscribed 4G core network through the E-UTRAN, only the RRC connection between the terminal device and the E-UTRAN can be re-established. Similarly, if the terminal device wants to access the 4G core network through the E-UTRAN, and actually the terminal device does not subscribe to the 4G service, the registration of the terminal device in the 4G core network will also fail, and a similar problem will also exist when the terminal device accesses the 5G core network.

The problem with this is that the RRC connection between the terminal device and the E-UTRAN is released and then re-established, causing additional unnecessary signaling overhead.

Disclosure of Invention

The embodiment of the application provides a method, equipment and a system for modifying wireless connection, so that the additional signaling overhead caused by reestablishment after RRC connection release is reduced by modifying the RRC connection between terminal equipment and a wireless access network node.

In a first aspect, an embodiment of the present application provides a wireless connection modification method, including:

receiving, from a terminal device, identification information of a second network for a radio access network node serving a first network and the second network;

and the wireless access network node modifies the wireless resource control connection between the wireless access network node and the terminal equipment according to the identification information of the second network, and the modified wireless resource control connection is used for signaling transmission of the second network.

In the technical scheme, when the AMF network element of the first network determines that the terminal device is not subscribed to the service of the first network, the terminal device does not release the RRC connection between the terminal device and the radio access network node, but modifies the RRC connection between the terminal device and the radio access network node, so that the RRC connection is applicable to signaling transmission of the second network. Thereby reducing the extra signaling overhead caused by reestablishment after the RRC connection is released.

In a first possible implementation manner of the first aspect, the identification information of the second network is carried in a direct transfer message, a user assistance information message, or a connection modification request message.

With reference to the first aspect or any one of the first possible implementation manners of the first aspect, in a second possible implementation manner of the first aspect, the radio access network node receives, from the terminal device, identification information of the first network; and the wireless access network node selects an access and mobility management function network element in the first network according to the identification information of the first network.

In the technical scheme, in a scenario that one radio access network node can be connected with two core networks at the same time, when the radio access network node receives a signaling message of a terminal device, the radio access network node does not know which core network the signaling message is sent to. In the embodiment of the application, the terminal device sends the identification information of the first network to the radio access network node in the process of establishing the radio resource control connection or in the process of registering the first network, so that the radio access network node can determine which network the terminal device currently wants to access, and then selects the corresponding network element of the corresponding network to execute the subsequent process.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, in a radio resource control connection establishment process or a registration process of the first network, the radio access network node receives, from the terminal device, identification information of the first network.

With reference to the first aspect or any one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the method further includes:

the wireless access network node receives indication information from the terminal equipment, wherein the indication information is used for indicating that the terminal equipment does not sign a service of a first network;

when the radio access network node determines that the condition for handover to the first network is satisfied, the radio access network node does not initiate a handover request to the first network.

In the technical scheme, after the terminal device obtains the cause value, the indication information is sent to the radio access network node, and the indication information is used for indicating that the terminal device does not sign a service of the first network, so that unnecessary switching is avoided when the radio access network node determines that the condition for switching to the first network is met.

In a second aspect, an embodiment of the present application provides a wireless connection modification method, including:

a radio access network node serving a first network and a second network receives a cause value from an access and mobility management function network element of the first network, wherein the cause value is used for indicating that a terminal device does not sign a service of the first network;

and the wireless access network node modifies the wireless resource control connection between the wireless access network node and the terminal equipment according to the cause value, and the modified wireless resource control connection is used for signaling transmission of the second network.

In the technical scheme, the terminal equipment does not release the RRC connection between the terminal equipment and the radio access network node, and meanwhile, the radio access network node modifies the RRC connection according to the reason value sent by the access and mobility management function network element, so that the RRC connection is suitable for signaling transmission of a second network. Thereby reducing the extra signaling overhead caused by reestablishment after the RRC connection is released.

In a first possible implementation manner of the second aspect, the cause value is further used to indicate that the terminal device signs up for a service of the second network.

With reference to the second aspect or any one of the first possible implementation manners of the second aspect, in a second possible implementation manner of the second aspect, the radio access network node receives, from the terminal device, identification information of the first network; and the wireless access network node selects an access and mobility management function network element in the first network according to the identification information of the first network.

With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the radio access network node receives, from the terminal device, identification information of the first network in a radio resource control connection establishment process or a registration process of the first network.

With reference to the second aspect or any one of the first to third possible implementation manners of the second aspect, in a fourth possible implementation manner of the second aspect, the method further includes:

In a third aspect, an embodiment of the present application provides a wireless connection modification method, including:

In the technical scheme, after receiving the indication message for indicating that the terminal device is not signing the service of the first network, the radio access network node does not initiate a switching request to the first network, so that unnecessary switching is avoided when the radio access network node determines that the condition for switching to the first network is met.

In a fourth aspect, an embodiment of the present application provides a wireless connection modification method, including:

the terminal equipment receives a registration rejection message from a wireless access network node serving a first network and a second network, wherein the registration rejection message comprises a cause value used for indicating that the terminal equipment does not sign a service of the first network;

the terminal equipment reserves the radio resource control connection between the wireless access network node and the terminal equipment according to the cause value;

the terminal device initiates registration of the second network with the radio access network node.

In the technical scheme, the terminal equipment does not release the RRC connection between the terminal equipment and the radio access network node, so that the extra signaling overhead caused by reestablishment after the RRC connection is released is reduced.

In a first possible implementation manner of the fourth aspect, the terminal device sends, to the radio access network node, identification information of the second network, where the identification information of the second network is used to indicate that the radio resource control connection is used for signaling transmission of the second network.

In the technical scheme, the terminal device sends the identification information of the second network to modify the RRC connection between the terminal device and the radio access network node, so that the RRC connection is suitable for signaling transmission of the second network.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the identification information of the second network is carried in a direct transfer message, a user assistance information message, or a connection modification request message.

With reference to the fourth aspect and any one of the first to the second possible implementation manners of the fourth aspect, in a third possible implementation manner of the fourth aspect, after the terminal device receives a registration rejection message from a radio access network node serving the first network and the second network, the method further includes:

and the terminal equipment sends indication information to the wireless access network node, wherein the indication information is used for indicating that the terminal equipment does not sign the service of the first network.

In the technical scheme, the indication information is used for indicating that the terminal device is not subscribed to the service of the first network, so that the radio access network node learns that the terminal device cannot be served by the first network, that is, the terminal device cannot access the first network.

With reference to the fourth aspect and any one of the first to third possible implementation manners of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the method further includes:

the terminal equipment sends identification information of a first network to the wireless access network node, wherein the identification information of the first network is used for indicating to select an access and mobility management function network element in the first network to provide services.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, in a radio resource control connection establishment process or a registration process of the first network, the terminal device sends identification information of the first network to the radio access network node.

In a fifth aspect, an embodiment of the present application provides a wireless connection modification method, including:

and the terminal equipment sends indication information to the wireless access network node according to the reason value, wherein the indication information is used for indicating that the terminal equipment does not sign the service of the first network.

In the technical scheme, after receiving a cause value for indicating that the terminal device is not signing a service of the first network, the terminal device sends indication information to the radio access network node to indicate that the terminal device is not signing a service of the first network, so that the radio access network node does not initiate a switching request to the first network, and unnecessary switching is avoided when the radio access network node determines that a condition for switching to the first network is met.

In a sixth aspect, an embodiment of the present application provides a wireless connection modification method, including:

the method comprises the steps that an access and mobility management function network element of a first network receives indication information from a unified data management network element of the first network, wherein the indication information is used for indicating that terminal equipment does not sign a service of the first network;

and the access and mobility management function network element sends a reason value to the wireless access network nodes serving the first network and the second network according to the indication information, wherein the reason value is used for indicating that the terminal equipment does not sign the service of the first network.

In the technical scheme, the access and mobility management function network element sends a cause value to the radio access network node, so that the radio access network node modifies the RRC connection according to the cause value sent by the access and mobility management function network element, and the RRC connection is suitable for signaling transmission of the second network. Thereby reducing the extra signaling overhead caused by reestablishment after the RRC connection is released.

In a first possible implementation manner of the sixth aspect, the indication information is further used to indicate that the terminal device signs a service of a second network; the cause value is also used for indicating that the terminal equipment signs the service of the second network.

A seventh aspect of the present application provides a radio access network node. Including a processor, a memory, and a transceiver. The processor is connected to the memory and the transceiver, for example, the processor may be connected to the memory and the transceiver through a bus. The transceiver is used for communicating with other network devices. The memory is for storing computer executable program code. Wherein the program code stored by the memory comprises instructions which, when executed by the processor, cause the radio access network node to perform the method performed by the radio access network node of the first, second or third aspect described above.

An eighth aspect of the present application provides another radio access network node, including a receiving module and a processing module, where the receiving module is configured to implement the transceiver in the seventh aspect, and the processing module is configured to implement the processor in the sixth aspect. The radio access network node implements part or all of the methods of the first, second or third aspect by means of the modules described above.

A ninth aspect of the present application provides a terminal device. Including a processor, a memory, and a transceiver. The processor is connected to the memory and the transceiver, for example, the processor may be connected to the memory and the transceiver through a bus. The transceiver is used for communicating with other network devices. The memory is for storing computer executable program code. Wherein the program code stored in the memory comprises instructions which, when executed by the processor, cause the terminal device to perform the method performed by the terminal device of the fourth or fifth aspect.

A tenth aspect of the present application provides another terminal device, including a receiving module, a sending module, and a processing module, where the receiving module and the sending module are used to implement the transceiver in the ninth aspect, and the processing module is used to implement the processor in the tenth aspect. The terminal device implements part or all of the method of the fourth aspect or the fifth aspect through the modules.

An eleventh aspect of the present application provides a managing network element. Including a processor, a memory, and a transceiver. The processor is connected to the memory and the transceiver, for example, the processor may be connected to the memory and the transceiver through a bus. The transceiver is used for communicating with other network devices. The memory is for storing computer executable program code. Wherein the program code stored by the memory comprises instructions which, when executed by the processor, cause the managing network element to perform the method performed by the access and mobility management function network element of the sixth aspect described above.

A twelfth aspect of the present application provides another management network element, including a receiving module and a transmitting module, where the receiving module and the transmitting module are used to implement the transceiver in the eleventh aspect. The management network element implements part or all of the method of the sixth aspect through the above modules.

In a thirteenth aspect of the present application, a storage medium is provided, where the storage medium stores program code, and when the program code is executed by a computing device, the program code performs part or all of the methods provided by any one of the implementations of the first aspect to the sixth aspect.

In a fourteenth aspect of the present application, a computer program product is provided, which when executed by a computing device, performs part or all of the methods provided by any one of the implementations of the first aspect to the sixth aspect.

In a fifteenth aspect, an embodiment of the present application provides a wireless connection modification system, including:

a wireless access network node, a terminal device and an access and mobility management function network element;

the radio access network node is configured to perform the radio connection modification method of any of the first and second aspects;

the terminal device is configured to execute the wireless connection modification method of any one of the fourth aspects;

the access and mobility management function network element is configured to perform the radio connection modification method of any of the fourth aspects.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

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

fig. 2 is a flowchart illustrating a method for modifying a wireless connection according to an embodiment of the present application;

fig. 3 is a flowchart illustrating another method for modifying a wireless connection according to an embodiment of the present application;

fig. 4 is a flowchart illustrating a network service method according to an embodiment of the present application;

fig. 5 is a flowchart illustrating another wireless connection modification method provided in an embodiment of the present application;

fig. 6 is a flowchart illustrating another wireless connection modification method provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a radio access network node according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of an access and mobility management function network element according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a physical device according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure. The communication system comprises a terminal device 101, a core network element of 4G, a core network element of 5G, and an access network node 102 serving both 4G and 5G. The core network element of 4G includes a Mobility Management Entity (MME) 103 and a Home Subscriber Server (HSS) 104. The core network elements of 5G include an Access and Mobility Management Function (AMF) element 105 and a Unified Data Management (UDM) element 106. The description of each network element is as follows:

the terminal apparatus 101: may be a User Equipment (UE). The UE is a device accessing the network side through the base station, and may be, for example, a handheld terminal device, a notebook computer, a subscriber unit (subscriber unit), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a Personal Digital Assistant (PDA) computer, a tablet computer, a wireless modem (modem), a handheld device (hand held), a laptop computer (laptop computer), a cordless phone (cordless phone), or a Wireless Local Loop (WLL) station, a Machine Type Communication (MTC) terminal, or other devices that can access the network. The UE and the base station adopt a certain air interface technology to communicate with each other.

The Access Network node 102 may be a Radio Access Network (RAN) node: the wireless communication device is mainly responsible for functions of wireless resource management, Quality of Service (QoS) management, data compression, encryption and the like on the air interface side. The radio access network node may comprise various forms of base stations, for example: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, etc. In systems using different radio access technologies, the names of devices with base station functionality may be different, for example, in a fifth generation (5G) communication system, referred to as a gNB; in an LTE system, it is called an evolved NodeB (eNB or eNodeB).

AMF network element 105: the network element belongs to a 5G core network element and is mainly responsible for a signaling processing part, namely a control plane function, which comprises functions of access control, mobility management, registration, de-registration and the like.

UDM network element 106: for storing user data such as subscription information, authentication/authorization information.

MME 103: a key control node in the third Generation Partnership Project (3GPP, 3rd Generation Partnership Project) LTE belongs to a 4G core network element, and is mainly responsible for a signaling processing part, i.e., a control plane function, including functions such as access control, mobility management, attach and detach, a session management function, and gateway selection.

The HSS 104: the system is used for storing the subscription information of the user and executing the authentication and authorization of the user.

In this embodiment, the terminal device is connected to a RAN node, and the RAN node may be connected to both an AMF network element of a 5G core network and an MME of a 4G core network. The AMF network element is connected with the UDM network element, and the AMF network element can acquire subscription information from the UDM network element. The MME is connected with the HSS, and the MME can acquire subscription information from the HSS.

Referring to fig. 2, fig. 2 is a flowchart illustrating a radio connection modification method according to an embodiment of the present application, in which a terminal device initiates modification of a radio resource control connection between a radio access network node and the terminal device. The method includes, but is not limited to, the steps of:

s201, the terminal device establishes Radio Resource Control (RRC) connection with the Radio access network node.

For example, the terminal device may be terminal device 101 in fig. 1. The radio access network node may be the access network node 102 in fig. 1.

And the terminal equipment and the radio access network node perform RRC connection establishment process. For example, the terminal device first sends an RRC CONNECTION REQUEST message (RRC CONNECTION REQUEST) to the radio access network node, requesting establishment of an RRC CONNECTION. The radio access network node sends an RRC CONNECTION SETUP message (RRC CONNECTION SETUP) to the terminal device, and the terminal device sends an RRC CONNECTION SETUP COMPLETE message (RRC CONNECTION SETUP COMPLETE) to the radio access network node after determining that the RRC CONNECTION SETUP is successful, so that the RRC CONNECTION SETUP process is completed.

Optionally, in the RRC connection establishment procedure, the terminal device may send the identification information of the first network to the radio access network node. For example, the RRC connection request message may include identification information of the first network. The identification information of the first network is used for indicating the first network which the terminal device wants to access. In this embodiment of the present application, the first network is a 5G core network, and the identification information of the first network may be an identification of the 5G core network. It should be noted that the identification information of the first network is identification information that can be recognized by both the terminal device and the radio access network node.

S202, the terminal equipment initiates registration of the first network to the wireless access network node.

After the RRC connection between the terminal device and the radio access network node is established, a Registration Request (Registration Request) message of the first network may be sent to the radio access node. The registration request message is used to instruct the radio access network node to perform registration of the first network for the terminal device. The registration request message is encapsulated in a specific message body between the terminal device and the wireless Access node, such as AN Access Network message (AN message).

In a possible design, if the terminal device sends the identification information of the first network to the radio access network node when the RRC connection is established in S201, the terminal device may not send the identification information of the first network any more when sending the registration request message to the radio access node. Since the radio access network node already knows the first network the terminal device wishes to access through the RRC connection setup procedure.

In another possible design, if the terminal device does not send the identification information of the first network to the radio access network node when the RRC connection is established in S201, the terminal device may send the identification information of the first network simultaneously when sending the registration request message to the radio access node. The identification information of the first network is used for indicating the first network which the terminal device wants to access. Taking AN message as AN example, the AN message sent by the terminal device to the wireless access node includes a registration request message and identification information of the first network, the wireless access network node directly passes through to a control plane network element in the first network without parsing the registration request message, and meanwhile, the wireless access network node may obtain the identification information of the first network through the AN message. For the embodiment of the present application, the control plane network element in the first network refers to an access and mobility management function network element. The access and mobility management function network element may be, for example, the AMF network element 105 in fig. 1.

That is to say, in the processes of S201 and S202, the terminal device may send the identification information of the first network to the radio access network node, without specifically defining a message carrying the identification information of the first network, and the identification information of the first network may also be carried in one message separately and sent to the radio access network node.

It should be noted that the RRC connection establishment procedure may also be considered as part of the registration procedure of the first network. It can also be considered that the terminal device is the identification information of the first network sent to the radio access network node during registration of the first network.

S203, the wireless access network node selects an access and mobility management function network element in the first network according to the identification information of the first network.

The identification information of the first network sent in S201 or S202 indicates that the terminal device needs to access the 5G core network, so that the radio access network node may select an access and mobility management function AMF network element in the 5G core network to provide a service for the terminal device. The access and mobility management function network element may be, for example, the access and mobility management function AMF network element 105 in fig. 1. The specific selection method of the AMF network element may determine a suitable AMF network element according to some information in the registration request message, for example, according to the identifier of the terminal device, the slice information, and the like.

In a scenario where a radio access network node can be connected to two core networks at the same time, when the radio access network node receives a signaling message of a terminal device, it does not know to which core network the signaling message is sent. Through the steps, in the process of establishing the radio resource control connection or in the process of registering the first network, the terminal device sends the identification information of the first network to the radio access network node, so that the radio access network node can determine which network the terminal device currently wants to access, and then selects the corresponding network element of the corresponding network to execute the subsequent process.

And S204, the wireless access network node sends a registration request message to the access and mobility management function network element.

As described in S202, the radio access network node transparently transmits the received registration request message to the selected AMF network element.

S205, the access and mobility management function network element initiates a terminal context management Registration (numm _ UEContextManagement _ Registration) service to the unified data management network element of the first network.

For example, the unified data management network element may be the unified data management network element UDM network element 106 in fig. 1.

The purpose of the terminal context management registration service is to register an AMF network element serving a terminal device in a UDM network element, that is, to make the UDM network element store information about the AMF network element serving the terminal device. For example, the related information of the AMF network element includes at least one of an identity of the AMF network element, a user Permanent identity (SUPI), a type of access technology (access type), and the like.

The terminal context management registration service may include: and the AMF network element sends a terminal context management request message to the UDM network element, and the AMF network element performs registration according to the terminal context management request and returns a terminal context management response message.

In a first possible design, when the AMF network element initiates a terminal context management registration service, the AMF network element may carry an identifier of a terminal device and may also carry a type of an access technology, and the UDM network element may query, according to the identifier of the terminal device or the identifier of the UDM network element and the type of the access technology, whether the terminal device signs a service of a first network in a database. The database may be a database in which the UDM network element locally stores the subscription Data, or may be a storage network element dedicated to storing the subscription Data (e.g., a Unified Data storage network element, UDR). If the terminal device does not sign the service of the first network, the UDM network element may send first indication information to the AMF network element, where the first indication information is used to indicate that the terminal device does not sign the service of the first network. Optionally, the UDM network element may further query that the terminal device has signed a service of the second network, and the first indication information may be used to indicate that the terminal device has not signed a service of the first network and that the terminal device has signed a service of the second network. The first indication information may be carried by a terminal context management response message. For example, the first indication information may be included in an original bit (e.g., a bit carrying a cause value in an existing standard) in the terminal context management response message. Alternatively, the first indication information may be included in the indication information newly added in the terminal context management response message. In this design, after receiving the first indication information, the AMF network element may directly perform S207 instead of performing S206.

In a second possible design, in the terminal context management registration process, the UDM network element does not query whether the terminal device subscribes to the service of the first network, but only registers the AMF network element serving the terminal device to the UDM network element, and then S206 may be performed.

S206, the access and mobility management function network element initiates a subscription data acquisition (numdm _ subscriber data management _ Get) service of the terminal device to the unified data management network element of the first network.

The purpose of the subscription data acquisition service is to acquire subscription data corresponding to the terminal device. The subscription data acquisition service may include: and the AMF network element sends a signing data acquisition request message to the UDM network element, the UDM network element inquires signing data corresponding to the terminal equipment, and the UDM network element returns a signing data acquisition response message to the AMF network element.

If the terminal device does not sign the service of the first network, the UDM network element may send first indication information to the AMF network element, where the first indication information is used to indicate that the terminal device does not sign the service of the first network. Optionally, the UDM network element may further query that the terminal device has signed a service of the second network, and the first indication information may be used for a service that the terminal device has not signed the first network and a service that the terminal device has signed the second network. The first indication information may be carried by a subscription data acquisition response message. For example, the first indication information may be included in an original bit (e.g., a bit carrying a cause value in an existing standard) in the subscription data acquisition response message. Alternatively, the first indication information may be included in the new indication information in the subscription data acquisition response message. And the AMF network element performs S207.

And S207, the access and mobility management function network element sends a registration rejection message to the terminal equipment according to the first indication information.

The registration reject message is used to indicate that the registration request of the terminal device fails. The registration rejection message may include a cause value indicating that the terminal device is not subscribed to the service of the first network. Further optionally, if the first indication information in S206 or S207 further indicates that the terminal device subscribes to the service of the second network, the cause value in the registration reject message may also be used to indicate that the terminal device subscribes to the service of the second network.

For example, the AMF network element may pass the registration rejection message through the radio access network node to the terminal device.

And S208, the terminal equipment reserves the radio resource control connection between the wireless access network node and the terminal equipment according to the reason value.

And the terminal equipment reserves the radio resource control connection between the wireless access network node and the terminal equipment according to the reason value in the received registration rejection message, and does not initiate an RRC connection release process between the wireless access network node and the terminal equipment. But initiates the modification procedure of the RRC connection, i.e., S209-S210.

S209, the terminal device sends the identification information of the second network to the radio access network node.

The identification information of the second network is used to indicate that the radio resource control connection is used for signaling transmission of the second network. In this embodiment of the present application, the second network is a 4G core network, and the identification information of the second network may be an identification of the 4G core network. Optionally, the identification Information of the second network may be carried in a Direct Transfer (Direct Transfer) message, a user Assistance Information message (UE Assistance Information message), or a connection modification request message. The connection modification request message is a newly expanded message used for instructing the radio access network node to modify the RRC connection.

S210, the wireless access network node modifies the wireless resource control connection between the wireless access network node and the terminal equipment according to the identification information of the second network, and the modified wireless resource control connection is used for signaling transmission of the second network.

And the radio access network node modifies the RRC connection originally used for the signaling transmission of the first network into the signaling transmission used for the second network according to the identification information of the second network. It is to be understood that the radio access network node corresponds an RRC connection between the radio access network node and the terminal device to the first network, modified to correspond to the second network.

For example, when the RRC connection is used for signaling transmission of the first network, the radio access network node may locally record that the identification information of the RRC connection corresponds to the identification information of the first network, which is equivalent to establishing a mapping relationship between the RRC connection and the first network, and when the radio access network node receives the signaling message sent by the RRC connection, the signaling message is correspondingly sent to a control plane network element (i.e., an AMF network element) of the first network for processing. When the radio access network node receives the identification information of the second network, the originally recorded identification information of the RRC connection is modified to the identification information of the first network, which corresponds to the identification information of the second network, which is equivalent to establishing a mapping relationship between the RRC connection and the second network, so that when the radio access network node receives the signaling message sent by the RRC connection, the signaling message is correspondingly sent to a control plane network element (i.e., an MME network element) of the second network for processing. Thus, the modification of the RRC connection is completed.

In the existing registration process, when the AMF network element of the first network determines that the terminal device is not subscribed to the service of the first network, a registration failure process is triggered, which results in the release of the RRC connection between the terminal device and the radio access network node. At this time, if the terminal device wants to access the second network, it is necessary to re-establish the RRC connection between the terminal device and the radio access network node. In the embodiment of the present application, the terminal device does not release the RRC connection between the terminal device and the radio access network node, but modifies the RRC connection between the terminal device and the radio access network node, so that the RRC connection is suitable for signaling transmission of the second network. Thereby reducing the extra signaling overhead caused by reestablishment after the RRC connection is released.

S211, the terminal device initiates registration of the second network to the radio access network node.

After the RRC connection modification procedure is completed, the terminal device may send a Registration Request message (Registration Request) of the second network to the radio access node through the RRC connection, where the Registration Request message is used to instruct the radio access node to perform Registration of the second network for the terminal device.

S212, the radio access network node selects a mobility management entity in the second network to perform a registration procedure of the second network.

The radio access network node knows that the RRC connection is used for signalling of the second network, so the radio access network node selects a mobility management entity, MME, in the second network to complete the registration procedure of the second network. And the subsequent MME interacts with network elements such as a Home Subscriber Server (HSS) and a wireless access network node, and the subsequent registration process is completed. For example, the mobility management entity may be the mobility management entity MME103 in fig. 1 and the home subscriber server may be the home subscriber server HSS104 in fig. 1. The registration process is similar to the process of registering the terminal to the 4G core network, and is not described herein again.

And after the registration is successful, the mobility management entity sends a registration acceptance message to the terminal equipment. For example, the AMF network element may pass the registration accept message through the radio access network node to the terminal device.

Optionally, in a possible implementation scenario, S207 may be followed by performing S213 and S214. The execution sequence of S213 and S214 is not distinguished from the execution sequence of S208-S212. In addition, in another possible implementation manner, S213 and S214 may be directly performed without performing S208 to S212.

S213, the terminal device sends the second indication information to the radio access network node.

In the embodiment of the present application, since the radio access network node transparently transmits the registration rejection message sent by the AMF network element to the terminal device, the radio access network node cannot resolve and acquire the cause value in the registration rejection message. After receiving the registration rejection message, the terminal device may send second indication information to the radio access network node according to the cause value indicating that the terminal device is not subscribed to the service of the first network in the registration rejection message. The second indication information is used for indicating that the terminal device is not subscribed to the service of the first network, so that the wireless access network node learns that the terminal device cannot be served by the first network, that is, the terminal device cannot access the first network.

And S214, when the wireless access network node determines that the condition for switching to the first network is met, the wireless access network node does not initiate a switching request to the first network according to the second indication information.

The condition for switching to the first network may be that the network service quality of the second network serving the terminal device is lower than a preset quality threshold, or that the network service quality of the first network is detected to be higher than the network service quality of the second network, or a combination of the two. The network service quality can be determined according to the signal strength, channel interference and other network parameters.

When the radio access network node determines that the condition for switching to the first network is met, the radio access network node does not initiate a switching request to the first network because the known terminal device does not sign the service of the first network.

In the prior art, when determining that a condition for switching to a first network is satisfied, a radio access network node initiates a process for switching to the first network, and when the first network detects that a terminal device is not signing a service of the first network, the first network abandons the switching, that is, the switching process is terminated, thereby causing signaling overhead between the radio access network node and the first network. In the embodiment of the application, after the terminal device obtains the cause value, the second indication information is sent to the radio access network node, so that unnecessary switching of the radio access network node is avoided.

It should be noted that, in this embodiment, the first network is a 5G core network, and the second network is a 4G core network, which is taken as an example for description. At this time, the implementation method is similar to S201-S214, and the difference is that after the terminal device registers to the 4G core network first, the radio access network node selects the MME to send the registration request message, the HSS queries that the terminal device is not subscribed to the 4G core network and is notified to the MME after subscribing to the 5G core network, and the MME sends the registration rejection message to the terminal device to trigger the terminal device to initiate the RRC connection modification process, indicate that the RRC connection is used for signaling transmission of the 5G core network and initiate the registration process of the 5G core network. That is, the MME exchanges with the AMF network element, and the HSS exchanges with the UDM network element to realize the process.

Referring to fig. 3, fig. 3 is a flowchart illustrating another radio connection modification method according to an embodiment of the present application, in which a radio access network node modifies a radio resource control connection between a radio access network node and a terminal device. The method includes, but is not limited to, the steps of:

s301, the terminal device establishes RRC connection with the radio access network node.

S302, the terminal device initiates registration of the first network to the wireless access network node.

And S303, the wireless access network node selects an access and mobility management function network element in the first network according to the identification information of the first network.

S304, the radio access network node sends a registration request message to the access and mobility management function network element.

S305, the access and mobility management function network element initiates a terminal context management registration service to a unified data management network element of the first network.

S306, the access and mobility management function network element initiates a subscription data acquisition service of the terminal device to the unified data management network element of the first network.

The specific implementation of S301-S306 can refer to S201-S206, which is not described herein.

S307, the network element with the access and mobility management functions sends a registration rejection message to the terminal equipment according to the first indication information.

The registration rejection message includes a first cause value indicating that the terminal device is not subscribed to the service of the first network. In the embodiment of the present application, the first cause value has the same meaning as the cause value in S207.

And S308, the access and mobility management function network element sends a second reason value to the wireless access network node according to the first indication information.

In the embodiment of the present application, the second cause value has the same meaning as the first cause value, and only a distinction is made. That is, the first cause value and the second cause value are both used to indicate that the terminal device is not subscribed to the service of the first network.

S307 and S308 may be executed separately or simultaneously. For example, the registration reject message in S307 is encapsulated in a specific message body, e.g., N2message (N2 message), between the AMF network element and the radio access node. In the implementation scenario where S307 and S308 are executed simultaneously, the AMF network element sends an N2message to the radio access network node, where the message body may include a registration reject message and a second cause value, where the registration reject message includes the first cause value. The radio access network node does not analyze the registration rejection message but directly passes the registration rejection message to the terminal equipment, and meanwhile, the second cause value is obtained from the N2 message.

S309, the terminal device reserves the radio resource control connection between the wireless access network node and the terminal device according to the first reason value.

S309 may be referred to as S208, and details are not described here.

S310, the wireless access network node modifies the wireless resource control connection between the wireless access network node and the terminal equipment according to the second reason value, and the modified wireless resource control connection is used for signaling transmission of a second network.

And the radio access network node modifies the RRC connection originally used for the signaling transmission of the first network into the signaling transmission used for the second network according to the second cause value received from the AMF network element. For example, the modification method of the RRC connection may refer to S210.

S311, the terminal device initiates registration of the second network to the radio access network node.

After receiving the registration reject message including the first cause value, the terminal device may send a registration request message of the second network to the radio access node, where the registration request message is used to instruct the radio access network node to perform registration of the second network for the terminal device.

S312, the radio access network node selects a mobility management entity in the second network to perform a registration procedure of the second network.

And after the registration is successful, the mobility management entity sends a registration acceptance message to the terminal equipment.

S212 may be referred to for specific implementation of S312, and details are not described here.

In the existing registration process, when the AMF network element of the first network determines that the terminal device is not subscribed to the service of the first network, a registration failure process is triggered, which results in the release of the RRC connection between the terminal device and the radio access network node. At this time, if the terminal device wants to access the second network, it is necessary to re-establish the RRC connection between the terminal device and the radio access network node. In the embodiment of the application, the terminal device does not release the RRC connection between the terminal device and the radio access network node, and the radio access network node modifies the RRC connection according to the second cause value sent by the access and mobility management function network element, so that the RRC connection is suitable for signaling transmission of the second network. Thereby reducing the extra signaling overhead caused by reestablishment after the RRC connection is released.

It should be noted that, in this embodiment, the first network is a 5G core network, and the second network is a 4G core network, which is taken as an example for description. At this time, the implementation method is similar to S301-S213, and the difference is that after the terminal device registers to the 4G core network first, the radio access network node selects the MME to send a registration request message, the HSS queries that the terminal device is not subscribed to the 4G core network and is subscribed to the 5G core network, and then notifies the MME, and the MME sends the second cause value to the radio access network node to trigger the radio access network node to modify the RRC connection for signaling transmission of the 5G core network. That is, the MME exchanges with the AMF network element, and the HSS exchanges with the UDM network element to realize the process.

Referring to fig. 4, fig. 4 is a schematic flowchart of a network service method provided in an embodiment of the present application, and the embodiment may be implemented by relying on the embodiment shown in fig. 2, or may be implemented independently. The method includes but is not limited to the following steps:

s401, the terminal equipment sends indication information to the wireless access network node.

In this embodiment, after determining that the terminal device does not subscribe to the service of the first network, the terminal device may send indication information to the radio access network node, where the indication information is used to indicate that the terminal device does not subscribe to the service of the first network. Here, the terminal device may obtain that the terminal device has not subscribed to the service of the first network through the embodiments shown in fig. 2 or fig. 3, or may obtain the service through other approaches, for example, the terminal device obtains the service according to information such as user settings.

S402, when the wireless access network node determines that the condition of switching to the first network is met, the wireless access network node does not initiate a switching request to the first network.

S214 may be referred to in the specific implementation manner of S402, and details are not described here.

In the prior art, when determining that a condition for switching to a first network is satisfied, a radio access network node initiates a process for switching to the first network, and when the first network detects that a terminal device is not signing a service of the first network, the first network abandons the switching, that is, the switching process is terminated, thereby causing signaling overhead between the radio access network node and the first network. In the embodiment of the application, after the terminal device determines that the terminal device does not sign the service of the first network, the terminal device sends the indication information to the radio access network node, so that unnecessary switching of the radio access network node is avoided.

Referring to fig. 5, fig. 5 is a flowchart illustrating another radio connection modification method provided in an embodiment of the present application, where in the embodiment of the present application, a terminal device reserves an RRC connection according to a cause value carried in a registration reject message. Further, modification of the radio resource control connection between the radio access network node and the terminal device is initiated by the terminal device. The method includes, but is not limited to, the steps of:

s501, the terminal device receives a registration reject message from a radio access network node serving the first network and the second network, where the registration reject message includes a cause value indicating that the terminal device has not subscribed to the service of the first network.

S207 may be referred to in a specific implementation manner of S501, that is, the AMF network element transparently transmits the registration rejection message to the terminal device through the radio access network node, which is not described herein again.

And S502, the terminal equipment reserves the radio resource control connection between the wireless access network node and the terminal equipment according to the reason value.

S208 may be referred to for specific implementation of S502, and details are not described here.

S503, the terminal device initiates registration of the second network to the radio access network node.

The terminal device reserves the RRC connection between the radio access network node and the terminal device, and the radio access network node may modify the RRC connection, and the modified radio resource control connection is used for signaling transmission of the second network. The terminal device thereby initiates registration of the second network with the radio access network node. S211 may be referred to for a specific implementation of S503, which is not described herein again.

In the implementation scenario of this embodiment, before S503, S504-S505 may be further included:

s504, the terminal device sends identification information of a second network to the wireless access network node, wherein the identification information of the second network is used for indicating the wireless resource control connection to be used for signaling transmission of the second network.

And S505, the wireless access network node modifies the wireless resource control connection between the wireless access network node and the terminal equipment according to the identification information of the second network, and the modified wireless resource control connection is used for signaling transmission of the second network.

The specific implementation of S504-S505 can refer to S209-S210, which is not described herein.

In the existing registration procedure, when the terminal device receives a registration rejection message from the radio access network node, a registration failure procedure is triggered, resulting in the release of the RRC connection between the terminal device and the radio access network node. At this time, if the terminal device wants to access the second network, it is necessary to re-establish the RRC connection between the terminal device and the radio access network node. In the embodiment of the present application, the terminal device does not release the RRC connection between the terminal device and the radio access network node, but modifies the RRC connection between the terminal device and the radio access network node, so that the RRC connection is suitable for signaling transmission of the second network. Thereby reducing the extra signaling overhead caused by reestablishment after the RRC connection is released.

Referring to fig. 6, fig. 6 is a flowchart illustrating another radio connection modification method according to an embodiment of the present application, in which a radio access network node modifies a radio resource control connection between a radio access network node and a terminal device. The method includes, but is not limited to, the steps of:

s601, the network element with access and mobility management functions of the first network receives indication information from the unified data management network element of the first network, where the indication information is used to indicate that the terminal device does not sign a service of the first network.

The specific implementation of S601 may refer to S305-S306, which are not described herein again. The indication information in this embodiment is the first indication information in S305-S306.

And S602, the network element with the access and mobility management functions sends a reason value to the wireless access network node serving the first network and the second network according to the indication information, wherein the reason value is used for indicating that the terminal equipment does not sign the service of the first network.

S308 may be referred to for specific implementation of S602, and details are not described here. The cause value in this embodiment is the second cause value in S308.

S603, the wireless access network node modifies the wireless resource control connection between the wireless access network node and the terminal equipment according to the cause value, and the modified wireless resource control connection is used for signaling transmission of the second network.

S603 may refer to S310, and details are not described here.

In the existing registration process, when the AMF network element of the first network determines that the terminal device is not subscribed to the service of the first network, a registration failure process is triggered, which results in the release of the RRC connection between the terminal device and the radio access network node. At this time, if the terminal device wants to access the second network, it is necessary to re-establish the RRC connection between the terminal device and the radio access network node. In the embodiment of the application, the terminal device does not release the RRC connection between the terminal device and the radio access network node, and the radio access network node modifies the RRC connection according to the cause value sent by the access and mobility management function network element, so that the RRC connection is suitable for signaling transmission of the second network. Thereby reducing the extra signaling overhead caused by reestablishment after the RRC connection is released.

The above mainly introduces the scheme provided in the embodiments of the present application from the perspective of interaction between different network elements. It is understood that other network elements such as radio access network nodes, terminal devices, access and mobility management function network elements, etc. include hardware structures and/or software modules corresponding to the respective functions for implementing the above-described functions. The elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein may be embodied in hardware or in a combination of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. 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 teachings.

In the embodiment of the present application, according to the above method example, functional modules or functional units may be divided for an access network node, a terminal device, an access and mobility management functional network element, and the like, for example, each functional module or functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing module or processing unit. The integrated modules or units may be implemented in the form of hardware, or may be implemented in the form of software functional modules. It should be noted that, in the embodiment of the present application, the division of the module or the unit is schematic, and is only a logic function division, and there may be another division manner in actual implementation. Please refer to the following detailed description.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a radio access network node according to an embodiment of the present disclosure. As shown in fig. 7, the radio access network node comprises: a receiving module 701 and a processing module 702.

In one embodiment, the radio access network node may be adapted to implement the functionality of the radio access network node in the embodiment illustrated in fig. 2 described above. For example,

the receiving module 701 is configured to receive, from a terminal device, identification information of the second network;

the processing module 702 is configured to modify a radio resource control connection between the radio access network node and the terminal device according to the identifier information of the second network, where the modified radio resource control connection is used for signaling transmission of the second network.

Optionally, the identification information of the second network is carried in a direct transfer message, a user assistance information message, or a connection modification request message.

Optionally, the receiving module 701 is further configured to: receiving identification information of the first network from the terminal device;

the processing module 702 is further configured to: and selecting an access and mobility management function network element in the first network according to the identification information of the first network.

Optionally, the receiving module 701 is specifically configured to:

and receiving the identification information of the first network from the terminal equipment in the radio resource control connection establishment process or the registration process of the first network.

Optionally, the receiving module 701 is further configured to: receiving indication information from the terminal equipment, wherein the indication information is used for indicating that the terminal equipment does not sign a service of the first network;

the processing module 702 is further configured to: when the radio access network node determines that conditions for handover to the first network are met, the radio access network node does not initiate a handover request to the first network.

It can be understood that, for a specific implementation manner and corresponding beneficial effects of the functional blocks included in the radio access network node in fig. 7, reference may be made to the specific description of the embodiment in fig. 2, which is not described herein again.

In another embodiment the radio access network node may be adapted to implement the functionality of the radio access network node in the embodiment shown in fig. 3 described above. For example,

a receiving module 701 is configured to receive a cause value from an access and mobility management function network element of a first network, where the cause value is used to indicate that a terminal device does not sign a service of the first network;

the processing module 702 is configured to modify, according to the cause value, the radio resource control connection between the radio access network node and the terminal device, where the radio resource control connection is modified and used for signaling transmission of the second network.

Optionally, the cause value is further used to indicate that the terminal device signs up for the service of the second network.

Optionally, the receiving module 701 is specifically configured to:

It can be understood that, for a specific implementation manner and corresponding beneficial effects of the functional blocks included in the radio access network node in fig. 7, reference may be made to the specific description of the embodiment in fig. 3, which is not described herein again.

In yet another embodiment the radio access network node may be adapted to implement the functionality of the radio access network node in the embodiment shown in fig. 4 described above. For example,

the receiving module 701 is configured to receive, by a radio access network node, indication information from a terminal device, where the indication information is used to indicate that the terminal device is not subscribed to a service of a first network;

the processing module 702 is configured to not initiate a handover request to the first network by the radio access network node when the radio access network node determines that the condition for handover to the first network is satisfied.

It can be understood that, regarding the specific implementation manner and corresponding beneficial effects of the functional blocks included in the radio access network node in fig. 7, reference may be made to the specific description of the embodiment in fig. 4, which is not described herein again.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device may be used to implement the functions of the terminal device in the embodiments shown in fig. 2-4 described above. As shown in fig. 8, the terminal device includes:

a receiving module 801, configured to receive a registration rejection message from a radio access network node serving a first network and a second network, where the registration rejection message includes a cause value indicating that the terminal device is not subscribed to a service of the first network;

a processing module 802, configured to reserve a radio resource control connection between the radio access network node and the terminal device according to the cause value;

a sending module 803, configured to initiate registration of the second network to the radio access network node.

Optionally, the sending module 803 is further configured to:

and sending the identification information of the second network to the radio access network node, wherein the identification information of the second network is used for indicating the radio resource control connection to be used for signaling transmission of the second network.

Optionally, the sending module 803 is further configured to:

and sending indication information to the radio access network node, wherein the indication information is used for indicating that the terminal equipment does not sign the service of the first network.

Optionally, the sending module 803 is further configured to:

and sending the identification information of the first network to the radio access network node, wherein the identification information of the first network is used for indicating that an access and mobility management function network element in the first network is selected to provide services.

Optionally, the sending module 803 is specifically configured to:

and sending the identification information of the first network to the radio access network node in the process of establishing the radio resource control connection or the registration process of the first network.

It can be understood that, regarding the specific implementation manner and corresponding beneficial effects of the functional blocks included in the terminal device in fig. 8, reference may be made to the specific descriptions of the embodiments in fig. 2 to fig. 4, which are not described herein again.

Referring to fig. 9, fig. 9 is a schematic structural diagram of an access and mobility management function network element according to an embodiment of the present application. The access and mobility management function network element may be configured to implement the functions of the access and mobility management function network element in the embodiments shown in fig. 2 to 4. As shown in fig. 9, the access and mobility management function network element includes:

a receiving module 901, configured to receive indication information from a unified data management network element of the first network, where the indication information is used to indicate that a terminal device does not sign a service of the first network;

a sending module 902, configured to send, according to the indication information, a cause value to a radio access network node serving the first network and the second network, where the cause value is used to indicate that the terminal device does not sign a service of the first network.

It can be understood that, regarding the specific implementation manner and corresponding beneficial effects of the functional blocks included in the access and mobility management functional network element in fig. 9, reference may be made to the specific descriptions of the embodiments in fig. 2 to fig. 4, which are not described herein again.

The radio access network node, the terminal device or the access and mobility management function network element in the embodiments shown in fig. 7, fig. 8 and fig. 9 may be implemented by an entity apparatus 1000 shown in fig. 10, where the entity apparatus includes: the processor 1001 and the transceiver 1003, and the processor 1001 and the transceiver 1003 are communicatively connected, for example, by a bus. The entity apparatus 1000 may also include a memory 1002.

In one embodiment, the entity apparatus 1000 is used to implement the functions of the radio access network node in the embodiment shown in fig. 7 described above. For example, the transceiver 1003 is configured to support information transmission between a radio access network node and a terminal device or an access and mobility management function network element involved in the foregoing embodiments, for example, the transceiver 1003 is configured to implement actions performed by any receiving module 701 in fig. 7, and the processor 1001 is configured to implement actions performed by any processing module 702 in fig. 7. The memory 1002 is adapted to store program codes and data for execution by the radio access network node and the processor 1001 is adapted to execute the application program codes stored in the memory 1002 to implement the actions of the radio access network node provided by the embodiments shown in fig. 2-4.

It should be noted that, in practical applications, a radio access network node may include one or more processors, and the structure of the radio access network node does not constitute a limitation to the embodiments of the present application.

In another embodiment, the entity apparatus 1000 is used to implement the functions of the terminal device in the embodiment shown in fig. 8. For example, the transceiver 1003 is configured to support information transmission between a terminal device and a radio access network node related to the foregoing embodiments, for example, the transceiver 1003 is configured to implement actions performed by any one of the receiving module 801 and the sending module 803 in fig. 8, and the processor 1001 is configured to implement actions performed by any one of the processing modules 802 in fig. 8. The memory 1002 is used for storing program codes and data for the terminal device to execute, and the processor 1001 is used for executing the application program codes stored in the memory 1002 to realize the actions of the terminal device provided by the embodiments shown in fig. 2-4.

It should be noted that, in practical applications, the terminal device may include one or more processors, and the structure of the terminal device does not form a limitation to the embodiments of the present application.

In another embodiment, the entity apparatus 1000 is configured to implement the functions of the access and mobility management function network element in the above-described embodiment shown in fig. 9. For example, the transceiver 1003 is used to support information transmission between the access and mobility management function network element and the radio access network node or the unified data management network element referred to in the above embodiments, for example, the transceiver 1003 is used to implement the actions performed by any one of the receiving module 901 or the sending module 902 in fig. 9. The memory 1002 is used for storing program codes and data for execution by the access and mobility management function network element, and the processor 1001 is used for executing the application program codes stored in the memory 1002 to implement the actions of the access and mobility management function network element provided by the embodiments shown in fig. 2-4.

It should be noted that, in practical applications, the access and mobility management function network element may include one or more processors, and the structure of the access and mobility management function network element does not form a limitation to the embodiments of the present application.

It should be noted that the processor 1001 in fig. 10 may be a Central Processing Unit (CPU), a Network Processor (NP), a hardware chip, or any combination thereof. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

The memory 1002 in fig. 10 may include a volatile memory (volatile memory), such as a Random Access Memory (RAM); the memory 1002 may also include a non-volatile memory (non-volatile memory), such as a read-only memory (ROM), a flash memory (flash memory), a Hard Disk Drive (HDD), or a solid-state drive (SSD); the memory 1002 may also comprise a combination of the above-described types of memory.

In an embodiment of the present application, a computer storage medium may be provided, which is used to store computer software instructions for the radio access network node in the embodiment shown in fig. 7, the terminal device in the embodiment shown in fig. 8, or the access and mobility management function network element in the embodiment shown in fig. 9, and includes a program for executing the program designed for the radio access network node, the terminal device, or the access and mobility management function network element in the above embodiments. The storage medium includes, but is not limited to, flash memory, hard disk, solid state disk.

In an embodiment of the present application, a computer program product is further provided, where the computer program product, when executed by a computing device, may execute the radio access network node in the embodiment shown in fig. 7, the terminal device in the embodiment shown in fig. 8, or the radio connection modification method designed for the access and mobility management function network element in the embodiment shown in fig. 9.

Claims

1. A wireless connection modification method, comprising:

receiving, by a radio access network node serving a first network and a second network, identification information of the second network from a terminal device, the terminal device not subscribing to a service of the first network;

2. The method of claim 1, wherein the identification information of the second network is carried in a direct transfer message, a user assistance information message, or a connection modification request message.

3. A wireless connection modification method, comprising:

and the wireless access network node modifies the wireless resource control connection between the wireless access network node and the terminal equipment according to the reason value, and the modified wireless resource control connection is used for signaling transmission of the second network.

4. The method of claim 3, wherein the cause value is further used to indicate that the terminal device is subscribed to the second network.

5. The method of any one of claims 1-4, further comprising:

the radio access network node receiving identification information of the first network from the terminal device;

and the wireless access network node selects an access and mobility management function network element in the first network according to the identification information of the first network.

6. The method of claim 5, wherein the radio access network node receiving identification information of the first network from the terminal device, comprising:

and in the process of establishing the radio resource control connection or the registration process of the first network, the radio access network node receives the identification information of the first network from the terminal equipment.

7. The method of any one of claims 1-4, further comprising:

the wireless access network node receives indication information from the terminal equipment, wherein the indication information is used for indicating that the terminal equipment does not sign the service of the first network;

and when the wireless access network node determines that the condition of switching to the first network is met, the wireless access network node does not initiate a switching request to the first network according to the indication information.

8. A wireless connection modification method, comprising:

a terminal device receives a registration rejection message from a radio access network node serving a first network and a second network, the registration rejection message including a cause value indicating that the terminal device is not subscribed to a service of the first network;

the terminal equipment reserves the radio resource control connection between the radio access network node and the terminal equipment according to the reason value;

the terminal device initiates registration of the second network to the radio access network node.

9. The method of claim 8, wherein the method further comprises:

and the terminal equipment sends the identification information of the second network to the wireless access network node, wherein the identification information of the second network is used for indicating the wireless resource control connection to be used for signaling transmission of the second network.

10. The method of claim 9, wherein the identification information of the second network is carried in a direct transfer message, a user assistance information message, or a connection modification request message.

11. The method of any of claims 8-10, wherein after receiving the registration rejection message from the radio access network node serving the first network and the second network, the terminal device further comprises:

12. The method of any one of claims 8-10, further comprising:

and the terminal equipment sends the identification information of the first network to the radio access network node, wherein the identification information of the first network is used for indicating to select an access and mobility management function network element in the first network to provide services.

13. The method of claim 12, wherein the terminal device sending identification information of the first network to the radio access network node, comprising:

and in the process of establishing the radio resource control connection or the registration process of the first network, the terminal equipment sends the identification information of the first network to the radio access network node.

14. A radio access network node, wherein the radio access network node serves a first network and a second network, comprising:

a receiving module, configured to receive, from a terminal device, identification information of the second network, where the terminal device does not sign a service of the first network;

and the processing module is used for modifying the radio resource control connection between the radio access network node and the terminal equipment according to the identification information of the second network, and the modified radio resource control connection is used for signaling transmission of the second network.

15. The radio access network node in claim 14, wherein the identification information of the second network is carried in a direct transfer message, a user assistance information message, or a connection modification request message.

16. A radio access network node, wherein the radio access network node serves a first network and a second network, comprising:

a receiving module, configured to receive a cause value from an access and mobility management function network element of a first network, where the cause value is used to indicate that a terminal device does not sign a service of the first network;

and the processing module is used for modifying the radio resource control connection between the radio access network node and the terminal equipment according to the reason value, and the modified radio resource control connection is used for signaling transmission of the second network.

17. The radio access network node in claim 16, wherein the cause value is further used to indicate that the terminal device is subscribed to the service of the second network.

18. The radio access network node according to any of claims 14-17,

the receiving module is further configured to: receiving identification information of the first network from the terminal device;

the processing module is further configured to: and selecting an access and mobility management function network element in the first network according to the identification information of the first network.

19. The radio access network node in claim 18, wherein the receiving module is specifically configured to:

20. The radio access network node according to any of claims 14-17,

the receiving module is further configured to: receiving indication information from the terminal equipment, wherein the indication information is used for indicating that the terminal equipment does not sign a service of the first network;

the processing module is further configured to: and when the wireless access network node determines that the condition of switching to the first network is met, not initiating a switching request to the first network according to the indication information.

21. A terminal device, comprising:

a receiving module, configured to receive a registration rejection message from a radio access network node serving a first network and a second network, where the registration rejection message includes a cause value indicating that the terminal device has not subscribed to a service of the first network;

a processing module, configured to reserve a radio resource control connection between the radio access network node and the terminal device according to the cause value;

a sending module, configured to initiate registration of the second network to the radio access network node.

22. The terminal device of claim 21, wherein the sending module is further configured to:

23. The terminal device of claim 22, wherein the identification information of the second network is carried in a direct transfer message, a user assistance information message, or a connection modification request message.

24. The terminal device of any of claims 21-23, wherein the sending module is further configured to:

25. The terminal device of any of claims 21-23, wherein the sending module is further configured to:

26. The terminal device of claim 25, wherein the sending module is specifically configured to:

27. A wireless connection modification system is characterized in that the system comprises a wireless access network node, terminal equipment and an access and mobility management function network element;

the radio access network node is a radio access network node according to any of claims 14-20;

the access and mobility management function network element for a terminal device according to any of claims 21 to 26, comprising:

a receiving module, configured to receive indication information from a unified data management network element of a first network, where the indication information is used to indicate that a terminal device does not sign a service of the first network;

and a sending module, configured to send a cause value to a radio access network node serving the first network and the second network according to the indication information, where the cause value is used to indicate that the terminal device does not sign a service of the first network.

28. A computer-readable storage medium comprising instructions, the storage medium having stored thereon program code, which, when executed by a computing device, causes a computer to perform a wireless connection modification method as claimed in any one of claims 1 to 13.