CN113141676B

CN113141676B - Method for non-3GPP accessed terminal to enter connection state and communication equipment

Info

Publication number: CN113141676B
Application number: CN202010061668.2A
Authority: CN
Inventors: 姜永; 王胡成
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2022-10-11
Anticipated expiration: 2040-01-19
Also published as: CN113141676A

Abstract

The embodiment of the invention relates to the technical field of wireless communication, and provides a method for a non-3GPP accessed terminal to enter a connection state and communication equipment; the method comprises the following steps: after receiving a bottom layer data link reestablishment instruction through a terminal which is accessed and registered to a 5G core network through a non-3GPP, sending a registration request message to an AMF entity through an N3IWF entity so that the AMF entity controls the terminal to enter a 5GMM connection state after acquiring a 5GMM context of the terminal according to a 5G-GUTI indicated by the registration request message; and the AMF entity can not determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message sent by the terminal, and controls the terminal to enter a 5GMM connection state after acquiring the 5GMM context information of the terminal according to the AMF corresponding to the GUAMI indicated by the terminal to the bottom layer. Various methods are provided for a terminal to transition from a 5GMM idle state to a 5GMM connected state.

Description

Method for non-3GPP accessed terminal to enter connection state and communication equipment

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and a communication device for a non-3 GPP-accessed terminal to enter a connection state.

Background

In the current 5G protocol standard, if a terminal (UE) is accessed to a 5G core network through Non-3GPP, the UE reestablishes a Non-Access-Stratum (NAS) signaling connection through a service request message, activates the UE to transition the UE from a 5GMM idle state to a 5GMM connected state, wherein the service request message includes 5G-S-TMSI, and the NAS layer provides an AMF entity selection of the GUAMI of the UE current terminal identification information 5G-GUTI to the bottom layer.

The UE sends a service request message to re-establish NAS signaling connection, the N3IWF entity receives the service request message and determines an AMF entity which is accessed by the UE before according to GUAMI provided by the UE to a bottom layer; however, in some cases, a new N3IWF entity accessed by the UE cannot determine the corresponding AMF entity according to the GUAMI provided by the UE to the bottom layer, and only a new AMF entity is selected again.

Further, the new AMF entity currently receiving the service request message of the UE cannot find the 5GMM context information registered through non-3GPP access of the UE according to the 5G-S-TMSI of the UE, and further cannot make the UE transition from the 5GMM idle state to the 5GMM connected state based on the 5GMM context of the UE.

Disclosure of Invention

The application provides a method for a non-3GPP accessed terminal to enter a connection state and communication equipment, which are used for at least providing a method for the non-3GPP accessed terminal to enter the connection state.

In a first aspect, the present application provides a method for a non-3 GPP-accessed terminal to enter a connected state, where the method includes:

after receiving the bottom layer data link reestablishment indication through a terminal which is accessed and registered to a 5G core network through non-3GPP, the terminal sends a registration request message to an AMF entity through an N3IWF entity, so that the AMF entity obtains the 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message and then controls the terminal to enter a 5GMM connection state.

In the method, after the terminal receives the instruction for reestablishing the underlying data link, the terminal can trigger a normal registration process to make the terminal change from the 5GMM idle state to the 5GMM connection state.

In a possible implementation manner, before the sending, by the N3IWF entity, the registration request message to the AMF entity after the terminal registered to the 5G core network through the non-3GPP access receives the underlying data link re-establishment instruction, the method further includes:

after the terminal sends a service request message to the AMF entity through the N3IWF entity, the service request message is determined to be rejected by receiving a service rejection message sent by the AMF entity, wherein the service rejection message comprises a cause value that the 5G-S-TMSI indicated by the service request message cannot determine the 5GMM context information of the terminal.

In a possible implementation manner, the AMF entity is an AMF entity reselected for the terminal after determining that there is no AMF entity corresponding to the GUAMI indicated to the bottom layer by the terminal after the N3IWF entity receives the service request message sent by the terminal.

In the method, the terminal can trigger a normal registration process after receiving the service rejection message, so that the terminal is converted from the 5GMM idle state to the 5GMM connection state, and the condition that the AMF entity cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message, and further the terminal cannot enter the 5GMM connection state is avoided.

In a possible implementation manner, before the sending, by the N3IWF entity, the registration request message to the AMF entity after the terminal registered to the 5G core network through the non-3GPP access receives the underlying data link re-establishment indication, the method further includes:

and after the service request message is sent, determining that a bottom link establishment failure indication is received.

In a possible implementation manner, the bottom link establishment failure indication is sent by the N3IWF entity according to the GUAMI indicated by the terminal when sending the service request message, after the AMF entity corresponding to the GUAMI cannot be determined by the GUAMI.

In the method, the N3IWF entity indicates the failure of the establishment of the bottom link to the terminal after determining that the AMF entity cannot be determined according to the GUAMI indicated by the terminal, and then the terminal triggers a normal registration flow, thereby avoiding the situation that the terminal cannot enter a 5GMM connection state because the AMF entity newly selected by the N3IWF does not have a 5GMM context of the UE.

In a second aspect, the present application provides a method for a terminal of a non-3GPP access to enter a connected state, where the method includes:

the AMF entity receives a service request message sent by a terminal which is accessed and registered to a 5G core network through a non-3GPP through an N3IWF entity, if 5GMM context information of the terminal can not be determined according to 5G-S-TMSI indicated by the service request message, the terminal is controlled to enter a 5GMM connection state after the 5GMM context information of the terminal is acquired from the AMF entity corresponding to GUAMI indicated by a bottom layer when the terminal sends the service request message, and the AMF entity corresponding to the GUAMI is the AMF entity which allocates the current 5G-GUTI of the terminal.

In the method, when the AMF entity cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message, the AMF entity acquires the 5GMM context information of the terminal from the AMF entity corresponding to the GUAMI according to the GUAMI indicated by the terminal to the bottom layer, so that the condition that the terminal cannot enter a 5GMM connection state due to the fact that the AMF entity does not have the 5GMM context information of the UE is avoided.

In a possible implementation manner, the AMF entity receives the service request message for the N3IWF entity, determines that there is no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer, and then reselects the AMF entity for the terminal.

In a possible implementation manner, the controlling, by the AMF entity, the terminal to enter a 5GMM connection state includes:

and after determining the 5GMM context information of the terminal and returning a service acceptance message, the AMF entity appoints a new 5G-GUTI to the terminal through a terminal configuration updating message.

In a possible implementation manner, the service request message is sent by the terminal to enable the terminal to enter a 5GMM connection state after receiving the bottom layer link reestablishment indication.

In a third aspect, the present application provides a method for a non-3GPP accessed terminal to enter a connection state, where the method includes:

an AMF entity receives a service request message sent by a terminal which is accessed and registered to a 5G core network through a N3IWF by a non-3GPP, wherein the service request message indicates that 5G-S-TMSI is contained and is sent after the terminal receives a bottom layer data link reestablishment indication, and the AMF entity is an AMF entity which is reselected for the terminal after the N3IWF entity determines that the AMF entity corresponding to GUAMI indicated to the bottom layer by the terminal does not exist after receiving the service request message;

if the 5GMM context information of the terminal cannot be determined according to the 5G-S-TMSI, sending a service rejection message to the terminal, wherein the service rejection message comprises a cause value that the AMF entity cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message;

and receiving a registration request message sent by the terminal through an N3IWF entity after receiving the service rejection message, and controlling the terminal to enter a 5GMM connection state after acquiring a 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message.

Advantageous effects of the above method can be described with reference to effects of the first aspect.

In a fourth aspect, the present application provides a method for a terminal of a non-3GPP access to enter a connected state, where the method includes:

after an N3IWF entity receives a service request message sent by a terminal which is accessed and registered to a 5G core network by a non-3GPP, if the fact that an AMF entity can not be determined according to GUAMI indicated by the terminal to a bottom layer is determined, a bottom layer link establishment failure indication is sent to the terminal so as to inform the terminal that the AMF entity can not be determined based on the GUAMI indicated by the terminal, and the service request message is sent after the terminal receives a bottom layer data link reestablishment indication;

and receiving a registration request message sent by the terminal after receiving the bottom link establishment failure indication, and sending the registration request message to a new AMF entity so that the new AMF entity controls the terminal to enter a 5GMM connection state after acquiring a 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message, wherein the new AMF entity is the AMF entity reselected for the terminal after the N3IWF entity receives the service request message and determines that no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer exists.

The advantageous effects of the above method can be referred to the description of the advantageous effects of the first aspect.

In a fifth aspect, the present application provides a terminal device, which includes a processor and a memory, where the memory is used to store a program executable by the processor, and the processor is used to read the program in the memory and execute the following steps:

after receiving the bottom layer data link reestablishment instruction through the terminal equipment which is accessed and registered to the 5G core network through the non-3GPP, the terminal equipment transmits a registration request message to the AMF entity through the N3IWF entity, so that the AMF entity obtains the 5GMM context of the terminal equipment according to the 5G-GUTI indicated by the registration request message and then controls the terminal equipment to enter a 5GMM connection state.

In one possible implementation, the processor is further configured to perform:

after a terminal device which is accessed and registered to a 5G core network through a non-3GPP receives a bottom layer data link reestablishment instruction, before a registration request message is sent to an AMF entity through an N3IWF entity, after a service request message is sent to the AMF entity through the N3IWF entity, the service request message is determined to be rejected by receiving a service rejection message sent by the AMF entity, wherein the service rejection message comprises a cause value which is indicated by the service request message and can not determine 5GMM context information of the terminal device through 5G-S-TMSI.

In a possible implementation manner, the AMF entity is an AMF entity reselected for the terminal device after determining that there is no AMF entity corresponding to the GUAMI indicated by the terminal device to the bottom layer after the N3IWF entity receives the service request message sent by the terminal device.

In one possible implementation, the processor is further configured to perform:

after receiving the bottom layer data link reestablishment instruction through the terminal equipment which is accessed and registered to the 5G core network by the non-3GPP, the terminal equipment determines to receive the bottom layer link reestablishment failure instruction before sending the registration request message to the AMF entity through the N3IWF entity and after sending the service request message.

In a possible implementation manner, the bottom link establishment failure indication is sent by the N3IWF entity according to the GUAMI indicated by the terminal device to the bottom layer when sending the service request message, after failing to determine the AMF entity corresponding to the GUAMI.

In a sixth aspect, the present application provides a communication device comprising a processor and a memory, the memory being configured to store a program executable by the processor, the processor being configured to read the program in the memory and perform the following steps:

receiving a service request message sent by a terminal which is accessed and registered to a 5G core network through a non-3GPP through an N3IWF entity, if the 5GMM context information of the terminal can not be determined according to the 5G-S-TMSI indicated by the service request message, controlling the terminal to enter a 5GMM connection state after acquiring the 5GMM context information of the terminal from an AMF corresponding to GUAMI indicated by a bottom layer when the terminal sends the service request message, wherein the AMF corresponding to the GUAMI is an AMF entity for distributing the current 5G-GUTI of the terminal.

In a possible implementation manner, the communication device receives the service request message for an N3IWF entity, determines that there is no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer, and then reselects the AMF entity for the terminal.

In one possible implementation, the processor is specifically configured to perform:

and after determining the 5GMM context information of the terminal and returning a service acceptance message, assigning a new 5G-GUTI to the terminal through a terminal configuration updating message.

In a seventh aspect, the present application provides a communication device, which includes a processor and a memory, wherein the memory is used for storing programs executable by the processor, and the processor is used for reading the programs in the memory and executing the following steps:

receiving a service request message sent by a terminal which is accessed and registered to a 5G core network through a non-3GPP through an N3IWF, wherein the service request message indicates that 5G-S-TMSI exists and is sent after the terminal receives a bottom layer data link reestablishment indication, and the communication equipment determines that an AMF entity corresponding to GUAMI indicated to the bottom layer by the terminal does not exist after the N3IWF entity receives the service request message and then reselects the AMF entity for the terminal;

if the 5GMM context information of the terminal cannot be determined according to the 5G-S-TMSI, sending a service rejection message to the terminal, wherein the service rejection message comprises a reason value that the communication equipment cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message;

In an eighth aspect, the present application provides a communication device comprising a processor and a memory, the memory being configured to store a program executable by the processor, the processor being configured to read the program in the memory and execute the following steps:

after receiving a service request message sent by a terminal which is accessed and registered to a 5G core network by a non-3GPP, if determining that an AMF entity can not be determined according to GUAMI indicated by the terminal to a bottom layer, sending a bottom layer link establishment failure indication to the terminal so as to inform the terminal that the AMF entity can not be determined based on the GUAMI indicated by the terminal, wherein the service request message is sent after the terminal receives a bottom layer data link reestablishment indication;

and receiving a registration request message sent by the terminal after receiving the indication of the failure in establishing the bottom link, and sending the registration request message to a new AMF entity, so that the new AMF entity obtains the 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message and then controls the terminal to enter a 5GMM connection state, wherein the new AMF entity is an AMF entity reselected for the terminal after the communication equipment receives the service request message and determines that no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer exists.

In a ninth aspect, the present application provides a communication apparatus comprising:

a registration triggering unit, configured to send a registration request message to an AMF entity through an N3IWF entity after the communication apparatus, which is registered to a 5G core network through non-3GPP access, receives a bottom layer data link reestablishment indication, so that the AMF entity obtains a 5GMM context of the communication apparatus according to a 5G-GUTI indicated by the registration request message and controls the communication apparatus to enter a 5GMM connection state.

In a tenth aspect, the present application provides a communication apparatus comprising:

and the activation terminal unit is used for receiving a service request message sent by a terminal which is accessed and registered to a 5G core network through a non-3GPP through an N3IWF entity, if the 5GMM context information of the terminal can not be determined according to the 5G-S-TMSI indicated by the service request message, controlling the terminal to enter a 5GMM connection state after acquiring the 5GMM context information of the terminal from an AMF corresponding to GUAMI indicated by a bottom layer when the terminal sends the service request message, wherein the AMF corresponding to the GUAMI is an AMF entity for distributing the current 5G-GUTI of the terminal.

In an eleventh aspect, the present application provides a communication apparatus comprising:

a service request message receiving unit, configured to receive a service request message sent by a terminal that is non-3GPP access-registered to a 5G core network through an N3IWF, where the service request message indicates that there is a 5G-S-TMSI and the service request message is sent after the terminal receives a bottom layer data link reestablishment indication, and the communication device is an AMF entity that is reselected for the terminal after determining that there is no AMF entity corresponding to a GUAMI indicated to the bottom layer by the terminal after the N3IWF entity receives the service request message;

a service request rejection unit, configured to send a service rejection message to the terminal if the 5GMM context information of the terminal cannot be determined according to the 5G-S-TMSI, where the service rejection message includes a cause value that the communication device cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message;

and the activation terminal unit is used for receiving a registration request message sent by the N3IWF entity after the terminal receives the service rejection message, and controlling the terminal to enter a 5GMM connection state after acquiring a 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message.

In a twelfth aspect, the present application provides a communication apparatus, comprising:

a bottom link establishment failure indication unit, configured to send a bottom link establishment failure indication to a terminal to notify the terminal that an AMF entity cannot be determined based on GUAMI indicated by the terminal if it is determined that the AMF entity cannot be determined according to GUAMI indicated by the terminal to the bottom after receiving a service request message sent by the terminal that is accessed and registered to a 5G core network, where the service request message is sent after the terminal receives a bottom data link reestablishment indication;

a registration request message forwarding unit, configured to receive a registration request message sent by the terminal after receiving the indication of failed establishment of the underlying link, and send the registration request message to a new AMF entity, so that the new AMF entity obtains a 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message and then controls the terminal to enter a 5GMM connection state, where the new AMF entity is an AMF entity reselected for the terminal after the communication device receives the service request message and determines that there is no AMF entity corresponding to the GUAMI indicated by the terminal to the underlying layer.

In a thirteenth aspect, the present application further provides a computer storage medium having a computer program stored thereon, which when executed by a processing unit, performs the steps of the method of the first or second or third or fourth aspect.

The advantageous effects of the above third to thirteenth aspects may be described with reference to the above description of the first and second aspects.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic diagram of an application scenario in which a non-3GPP access terminal enters a connection state according to an embodiment of the present application;

fig. 2 is a schematic diagram of a method for a non-3GPP access terminal to enter a connection state according to an embodiment of the present application;

fig. 3 is a schematic diagram of a method for a non-3 GPP-accessed terminal to enter a connection state according to an embodiment of the present application;

fig. 4 is a schematic diagram illustrating a method for a non-3 GPP-accessed terminal to enter a connection state according to an embodiment of the present application;

fig. 5 is an interaction diagram of a terminal, an N3IWF entity, and an AMF entity in a process that the terminal enters a connection state according to an embodiment of the present application;

fig. 6 is an interaction diagram of a terminal, an N3IWF entity, and an AMF entity in a process that the terminal enters a connection state according to an embodiment of the present application;

fig. 7 is an interaction diagram of a terminal, an N3IWF entity, and an AMF entity in a process that the terminal enters a connection state according to an embodiment of the present application;

fig. 8 is an interaction diagram of a terminal, an N3IWF entity, and an AMF entity in a process that the terminal enters a connection state according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

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

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

5G-GUTI: the terminal identification information is called as 5G Global Unique temporal identity (5G-GUTI) used in the 5G system, and aims to reduce the permanent identification of the terminal used in communication and improve the safety; the 5G-GUTI consists of two parts, GUAMI and 5G-TMSI, wherein the GUAMI is used for indicating which AMF entity is allocated the 5G-GUIT, and the 5G-TMSI identifies the identity (id) of the terminal which is unique in the AMF entity.

5G-S-TMSI: the 5G-GUTI is shortened, and the introduction of the 5G-S-TMSI is to make an air interface signaling message smaller and improve air interface efficiency, and if paging is carried out, only the 5G-S-TMSI is needed to page the mobile station.

AMF: namely, access and Mobility Management functions, which are all referred to as Access and Mobility Management functions in english, and which can perform registration Management, connectivity Management, mobility Management, lawful interception, transmission of SM messages between a terminal and an SMF, access authentication, and collection of 5GMM (5G Mobility Management) context information of the terminal, etc.

N3IWF: and a Non-3GPP InterWorking Function, which is generally called Non-3GPP InterWorking Function in english, and supports functions of establishing an IPsec tunnel with the terminal, relaying control plane NAS signaling of an uplink and a downlink between the terminal and the AMF entity, processing N2 signaling from the AMF, supporting selection of the AMF entity, and the like.

The following explains the concept of the present application.

When a terminal is accessed into a 5G core network through a non-3GPP access network in a 3GPP 5G network, if an underlying network link exists all the time, the terminal keeps a 5GMM connection state (5 GMM-CONNECTED) in the non-3GPP access network all the time; once the underlay link informs the upper underlay network that it has disconnected, the terminal should immediately transition from the 5GMM-CONNECTED state to the 5GMM IDLE state (5 GMM-IDLE state) and start a non-3GPP de-registration activation timer (non-3 GPP registration timer) as well as the network start a non-3GPP implicit de-registration timer (non-3 GPP registration timer).

In the running process of the non-3GPP interference timer, if the non-3GPP access bottom layer indicates that the access layer link of the upper layer non-3GPP is already established, the terminal needs to stop the non-3GPP interference timer and send a service request message at this time, and the NAS connection is reestablished. Wherein the service request message comprises the 5G-S-TMSI of the 5G-GUTI currently used by the terminal, and the NAS provides the GUAMI of the 5G-GUTI of the terminal to the bottom layer. If the non-3GPP deregistration activation timer expires and the terminal still does not receive the indication of the establishment of the bottom layer link accessed by the non-3GPP, the terminal locally deregisters the 5G system service accessed by the non-3GPP and releases the 5GMM context information registered by the terminal through the non-3 GPP. The network side also registers the terminal after the non-3GPP implicit unregister timer expires, and releases the stored charging 3GPP access 5GMM context information of the terminal.

When a service request message sent by a terminal in the process of converting from a 5GMM idle state to a 5GMM connection state through the service request message reaches an N3IWF entity, the N3IWF entity can determine an AMF entity corresponding to the terminal according to GUAMI provided by the terminal to a bottom layer, if the N3IWF entity can not determine an AMF entity corresponding to the GUAMI according to the GUAMI, the N3IWF entity can select an AMF entity to access, so that the 5G-S-TMSI in the current service request message is not matched with the identification information of the currently and newly accessed AMF, the newly accessed AMF can not obtain the 5GMM context information of the terminal, and the terminal can not enter the 5GMM connection state.

In view of this, the present application provides a method for a non-3 GPP-accessed terminal to enter a connection state and a communication device, so as to provide several methods for a non-3 GPP-accessed terminal to enter a connection state.

In the method provided by the application, after receiving a bottom layer data link reestablishment instruction through a terminal which is accessed and registered to a 5G core network through a non-3GPP, a registration request message is sent to an AMF entity through an N3IWF entity, so that the AMF entity obtains a 5GMM context of the terminal according to a 5G-GUTI indicated by the registration request message and then controls the terminal to enter a 5GMM connection state; or after determining that the 5GMM context information of the terminal cannot be acquired according to the 5G-S-TMSI indicated by the terminal, the AMF entity can acquire the 5GMM context information of the terminal from the AMF entity corresponding to the GUAMI indicated by the bottom layer, and then control the terminal to enter a 5GMM connection state, wherein the AMF corresponding to the GUAMI is the AMF entity which allocates the current 5G-GUTI of the terminal.

In the embodiment of the application, the terminal is a device with a wireless communication function, and can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical treatment (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), etc.; but also UEs in various forms, mobile Stations (MSs), terminal equipment (terminal devices).

To make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1, an application scenario in which a terminal of a non-3GPP access enters a connection state is provided in the embodiment of the present application, where the application scenario includes at least one terminal 10, an N3IWF entity 11, and at least one AMF entity 12, where:

the terminal 10 may send a service request message to the AMF entity 12 through the N3IWF entity 11 to transition itself from the 5GMM idle state to the 5GMM connected state, and the terminal 10 may also send a registration request message after receiving a service reject message or an indication of a bottom layer link establishment failure, or after receiving an indication of a bottom layer data link re-establishment (i.e., when the terminal itself transitions from the 5GMM idle state to the 5GMM connected state), and trigger a registration procedure to make itself enter the 5GMM idle state.

The N3IWF entity 11 may determine, according to the GUAMI indicated by the terminal to the bottom layer, the AMF entity corresponding to the terminal, and forward the service request message of the terminal to the AMF entity, and may also send a bottom layer link establishment failure indication to the terminal after it is not determined that the AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer.

The AMF entity 12 may receive a service request message of the terminal through the N3IWF entity 11, determine 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message, send a service reject message to the terminal when the 5GMM context information of the terminal cannot be determined according to the 5G-S-TMSI indicated by the service request message, acquire the 5GMM context information of the terminal from an AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer, and control the terminal to enter a 5GMM connection state after acquiring the 5GMM context of the terminal.

The present application provides several methods for a non-3 GPP-accessed terminal to enter a connection state, and the following describes the methods in detail with reference to the accompanying drawings and the above application scenarios.

Method for entering connection state of first terminal

If the terminal registered to the 5G core network through non-3GPP access determines that the terminal needs to be converted into a 5GMM connection state from a 5GMM idle state, a registration process is triggered so that the terminal enters the 5GMM connection state.

That is, after receiving the bottom layer data link reestablishment indication through the terminal registered to the 5G core network by the non-3GPP access, the terminal transmits a registration request message to the AMF entity through the N3IWF entity, so that the AMF entity acquires the 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message and controls the terminal to enter a 5GMM connection state.

Specifically, the terminal sends a service request message including the current 5G-GUTI of the terminal to the N3IWF entity and indicates GUAMI to the bottom layer.

After receiving the service request message, the N3IWF entity determines whether an AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer exists according to the GUAMI provided by the terminal to the bottom layer, if so, the registration request message is directly sent to the AMF entity corresponding to the GUAMI, the AMF entity corresponding to the GUAMI acquires the 5GMM context information of the terminal, and then the terminal is controlled to enter a 5GMM connection state.

Further, the AMF entity corresponding to GUAMI may control the terminal to enter the 5GMM connection state by, but is not limited to, the following methods:

after the AMF entity corresponding to the GUAMI acquires the 5GMM context information of the terminal, a registration acceptance message can be sent to the terminal through the N3IWF entity.

In a possible case, if the N3IWF entity determines that there is no AMF entity corresponding to the GUAM provided by the terminal to the bottom layer, the N3IWF entity reselects an AMF entity for the terminal as a new AMF entity, and then the N3IWF entity sends the service request message to the reselected AMF entity, and the reselected AMF entity acquires the 5GMM context information of the terminal, thereby making the terminal enter a 5GMM connection state.

Further, after the reselected AMF acquires the 5GMM context information of the terminal, a registration acceptance message can be sent to the terminal through the N3IWF entity; further, the registration accept message may include the newly allocated 5G-GUTI of the terminal by the reselected AMF entity.

Optionally, when forwarding the service request message of the terminal to the reselected AMF entity or the AMF entity corresponding to GUAMI, the N3IWF entity may, but is not limited to, forward the service request message to the reselected AMF entity or the AMF entity of GUAMI through an N2 message.

Method for second terminal to enter connection state

After receiving the service rejection message in the process of entering the 5GMM connection state, the terminal which is accessed and registered to the 5G core network through the non-3GPP triggers the registration process.

Specifically, after receiving a bottom layer data link reestablishment instruction through a terminal registered to a 5G core network through non-3GPP access, a registration request message is sent to an AMF entity through an N3IWF entity, so that the AMF entity obtains a 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message and then controls the terminal to enter a 5GMM connection state.

Further, after receiving the bottom layer data link reestablishment indication through the terminal registered to the 5G core network through the non-3GPP access, before sending the registration request message to the AMF entity through the N3IWF entity, the method further includes:

Therefore, after the terminal receives the service rejection message, the reason why the 5GMM context information of the terminal cannot be determined can be known according to the reason.

Further, the service rejection message is sent after the AMF entity cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message, and at this time, the service rejection message includes a cause value that the AMF entity cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI; and the AMF entity is an AMF entity reselected for the terminal after the N3IWF entity determines that no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer after receiving the service request message.

Correspondingly, the reselected AMF entity receives a service request message sent by a terminal which is accessed and registered to the 5G core network from a 5GMM idle state to a 5GMM connection state, and sends the service rejection message to the terminal if the 5G-S-TMSI indicated by the service request message cannot determine the 5GMM context information of the terminal.

Referring to fig. 2, the following interaction from the terminal, the N3IWF entity and the AMF entity is illustrated:

step S201, after receiving the bottom layer data link reestablishment indication, the terminal sends a service request message to the N3IWF entity, wherein the service request message indicates that the 5G-S-TMSI of the terminal exists.

The service request message is sent when the NAS signaling connection is reestablished.

In step S201, the terminal further indicates GUAMI to the bottom layer, so that the other device determines the corresponding AMF entity according to GUAMI.

Step S202, the N3IWF entity receives the service request message, and reselects the AMF entity for the terminal after determining that no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer exists;

in step S203, the N3IWF entity sends a service request message of the terminal to the reselected AMF entity.

Alternatively, the N3IWF entity may send the service request message to the new AMF entity through an N2 message, but is not limited thereto.

Step S204, the reselected AMF entity receives the service request message, and sends a service reject message (service reject message) to the terminal after the 5G-S-TMSI indicated by the service request message fails to determine the 5GMM context information of the terminal, where the service reject message includes a cause value indicating that the 5G-S-TMSI cannot determine the 5GMM context information of the terminal.

In step S205, the N3IWF entity forwards the service rejection message.

Step S206, after receiving the service refusing message sent by the reselected AMF, the terminal sends a registration request message, and triggers a registration process to enable the terminal to enter a 5GMM connection state.

The following provides a procedure of the above registration procedure:

the terminal may, but is not limited to, transmit a registration request (registration request) message, which may include the terminal's current 5G-GUTI, to the reselected AMF entity through the N3IWF entity for registration.

Correspondingly, the reselected AMF entity may, but is not limited to, obtain the non-3GPP accessed 5GMM context information of the terminal from the old AMF according to the 5G-GUTI indicated in the registration request message, and further make the terminal enter a 5GMM connection state according to the 5GMM context information of the terminal, where the old AMF entity is an AMF entity that allocates the current 5G-GUTI of the terminal.

Further, after acquiring the 5GMM context information of the terminal, the reselected AMF entity may also send a registration accept (registration accept) message to the terminal, where the message may include a new 5G-GUTI allocated by the new AMF entity to the terminal.

Method for third terminal to enter connection state

After receiving a bottom layer link establishment failure indication in the process of entering a 5GMM connection state, a terminal which is accessed and registered to a 5G core network through non-3GPP triggers a registration process.

Optionally, after receiving the underlying data link reestablishment indication and before sending the registration request message to the AMF entity through the N3IWF entity, the terminal registered to the 5G core network through the non-3GPP access further includes:

Further, the indication of the failure of establishing the underlying link is sent by the N3IWF entity according to the GUAMI indicated by the terminal to the underlying layer when sending the service request message, after failing to determine the AMF entity corresponding to the GUAMI.

Correspondingly, in the process that a terminal registered to a 5G core network through non-3GPP access by an N3IWF entity changes the terminal from a 5GMM idle state to a 5GMM connection state through a service request message, if the GUAMI indicated to the bottom layer by the terminal is determined and the AMF entity corresponding to the GUAMI cannot be determined, a bottom layer link establishment failure indication is sent to the terminal so as to inform the terminal that the GUAMI indicated by the terminal cannot determine the AMF entity.

Referring to fig. 3, the following interaction from the terminal, the N3IWF entity and the AMF entity is illustrated:

step S301, after receiving the bottom layer data link reestablishment indication, the terminal sends a service request message to the N3IWF entity, wherein the service request message indicates that the 5G-S-TMSI of the terminal exists.

The service request message may be sent when the NAS signaling connection is re-established.

In step S301, the terminal further indicates GUAMI to the bottom layer, so that the other device determines the corresponding AMF entity according to GUAMI.

Step S302, the N3IWF entity receives the service request message, and after the AMF entity corresponding to the GUAMI cannot be determined according to the GUAMI indicated by the terminal to the bottom layer, a bottom layer link establishment failure indication is sent to the terminal so as to inform the terminal that the AMF entity corresponding to the GUAMI cannot be determined based on the GUAMI indicated by the terminal.

Step S303, after receiving the bottom link establishment failure indication sent by the N3IWF entity, the terminal sends a registration request message, and triggers the registration process to enable the terminal to enter a 5GMM connection state.

The following provides a procedure of the above registration procedure:

the terminal may, but is not limited to, send a registration request message to the AMF entity that the N3IWF entity reselects after failing to determine the AMF entity corresponding to the GUAMI for registration through the N3IWF entity, where the registration request message may include the current 5G-GUTI of the terminal.

Correspondingly, the reselected AMF entity may, but is not limited to, obtain the non-3GPP accessed 5GMM context information of the terminal from the old AMF according to the 5G-GUTI indicated in the registration request message, and then make the terminal enter a 5GMM connection state according to the 5GMM context information of the terminal, where the old AMF entity is the AMF entity that allocates the current 5G-GUTI of the terminal.

Further, after acquiring the 5GMM context information of the terminal, the reselected AMF entity may also send a registration acceptance message to the terminal, where the message may include a new 5G-GUTI allocated by the reselected AMF entity to the terminal.

Method for fourth terminal to enter connection state

And the new AMF entity acquires the 5GMM context information of the terminal from the AMF entity corresponding to the GUAMI according to the GUAMI indicated by the terminal to the bottom layer.

Specifically, the AMF entity receives a service request message sent by a terminal registered to a 5G core network through a non-3GPP access through an N3IWF entity, and if the 5GMM context information of the terminal cannot be determined according to the 5G-S-TMSI indicated by the service request message, the AMF entity controls the terminal to enter a 5GMM connection state after obtaining the 5GMM context information of the terminal from an AMF corresponding to a GUAMI indicated by a bottom layer when the terminal sends the service request message, where the AMF corresponding to the GUAMI is the AMF entity that allocates the current 5G-GUTI of the terminal.

Optionally, the AMF entity is an AMF entity reselected for the terminal after the N3IWF entity receives the service request message and determines that there is no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer.

Optionally, the controlling, by the AMF entity, the terminal to enter a 5GMM connection state includes:

Further, the service request message is transmitted by the terminal to enable the terminal to enter a 5GMM connection state after receiving the underlay link reestablishment indication.

Referring to fig. 4, the following interaction from the terminal, the N3IWF entity and the AMF entity is illustrated:

step S401, after receiving the bottom link reestablishment indication, the terminal sends a service request message to the N3IWF entity, wherein the service request message indicates the 5G-S-TMSI of the terminal.

In step S401, the terminal further indicates GUAMI to the bottom layer, so that the other device determines the corresponding AMF entity according to GUAMI.

Step S402, the N3IWF entity receives the service request message, and reselects the AMF entity for the terminal after determining that no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer exists;

at step S403, the N3IWF entity sends a service request message of the terminal to the reselected AMF entity.

Step S404, after the reselected AMF determines that the 5G-S-TMSI indicated by the service request message cannot acquire the 5GMM context information of the terminal, the 5G GMM context information of the terminal is acquired from the AMF entity corresponding to the GUAMI according to the GUAMI indicated by the terminal to the bottom layer.

In step S405, the reselected AMF sends a service acceptance message to the N3IWF entity.

In step S406, the N3IWF entity forwards the service receive (service accept) message.

Step S407, the reselected AMF assigns a new 5G-GUTI to the terminal through a terminal configuration update message.

It should be noted that, in the embodiment of the present application, the order of step S305 and step S307 is not limited.

Several examples of the above-described types of terminals entering a connected state are provided below.

It should be noted that the current terminal is in 5GMM idle state with a non-3GPP access to the 5G core network, and the access stratum of this non-3GPP access indicates to the NAS layer that a re-establishment has been made within the access stratum of the non-3GPP access.

Example 1

A specific example of the method in which the second terminal enters the connected state.

Referring to fig. 5, the interaction between the terminal, the N3IWF entity and the AMF entity is as follows:

step S501, the terminal sends a service request message and indicates GUAMI to the bottom layer, and the service request message indicates the 5G-S-TMSI of the terminal.

Step S502, the N3IWF entity can not determine the AMF entity corresponding to the GUAMI according to the GUAMI indicated by the terminal to the bottom layer, reselects an AMF entity for the terminal, and forwards the service request message to the reselected AMF entity through the N2 message;

in step S503, the reselected AMF entity cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message.

In step S504, the reselected AMF entity sends a service reject message to the terminal to indicate to the terminal a cause value for which the 5GMM context information of the terminal cannot be determined by referring to the 5G-S-TMSI.

In step S505, the N3IWF entity forwards the service rejection message to the terminal.

Step S506, after receiving the service refusing message, the terminal sends a registration request message, wherein the registration request message comprises the 5G-GUTI currently used by the terminal.

In step S507, the N3IWF entity forwards the registration request message to the reselected AMF entity.

Step S508, the reselected AMF entity obtains the 5GMM context information of the terminal from the old AMF entity according to the 5G-GUTI indicated by the registration request message, where the old AMF entity is the AMF entity corresponding to the 5G-GUTI indicated by the registration request message.

In step S509, the reselected AMF entity transmits a registration accept message including the new 5G-GUTI designated for the terminal to the N3IWF entity.

In step S510, the N3IWF entity forwards the registration accept message to the terminal.

Step S511, the terminal enters the 5GMM connection state after successful connection through the NAS signaling of the non-3 GPP.

Example 2

A specific example of a method of a first terminal entering a connected state.

Referring to fig. 6, the interaction of the terminal, the N3IWF entity and the AMF entity is as follows:

step S601, the terminal sends a service request message and indicates GUAMI to the bottom layer, and the service request message indicates that the current 5G-GUTI of the terminal exists.

Optionally, the terminal sends a mobile and periodic registration update service request message.

Step S602, the N3IWF entity determines that an AMF entity corresponding to the GUAMI exists according to the GUAMI indicated by the terminal to the bottom layer, and forwards the service request message to the AMF entity corresponding to the GUAMI through the N2 message;

step S603, the AMF entity corresponding to GUAMI determines that the 5GMM context information of the terminal is successful according to the 5G-GUTI indicated by the service request message.

Step S604, the AMF entity corresponding to GUAMI sends a registration acceptance message.

In step S605, the N3IWF entity forwards the registration acceptance message to the terminal.

Step S606, the terminal enters the 5GMM connection state through the successful NAS signaling connection of the non-3 GPP.

Example 3

A method of entering a connected state by a terminal, and a specific example of a change in AMF registered by the terminal.

Referring to fig. 7, the interaction of the terminal, the N3IWF entity and the AMF entity is as follows:

step S701, the terminal sends a service request message and indicates GUAMI to the bottom layer, and the service request message indicates that the current 5G-GUTI of the terminal exists.

Step S702, the N3IWF entity determines that an AMF entity corresponding to the GUAMI does not exist according to the GUAMI indicated by the terminal to the bottom layer, reselects an AMF entity for the terminal, and forwards the service request message to the reselected AMF entity through the N2 message;

at step S703, the reselected AMF entity cannot determine the 5GMM context information of the terminal according to the 5G-GUTI indicated by the service request message.

Step S704, the reselected AMF entity obtains the 5GMM context information of the terminal from the old AMF entity according to the 5G-GUTI indicated by the service request message. The old AMF entity is the AMF entity corresponding to the 5G-GUTI indicated by the service request message.

In step S705, the reselected AMF entity sends a registration accept message.

In step S706, the N3IWF entity forwards the registration accept message to the terminal.

Step S707, the terminal enters the 5GMM connection state through the successful NAS signaling connection of the non-3 GPP.

Example 4

A specific example of a method of the third terminal entering a connected state.

Referring to fig. 8, the interaction between the terminal, the N3IWF entity and the AMF entity is as follows:

step S801, the terminal sends a service request message and indicates GUAMI to the bottom layer, where the service request message indicates that there is the current 5G-S-TMSI of the terminal.

And S802, the N3IWF entity cannot determine the AMF entity corresponding to the GUAMI according to the GUAMI indicated by the terminal to the bottom layer.

In this step, the N3IWF entity may reselect a new AMF entity for the terminal itself.

Step S803, the N3IWF entity sends a bottom link establishment failure indication to the terminal, so as to notify the terminal that GUAMI based on the terminal indication cannot determine the AMF entity corresponding to the GUAMI.

Step S804, after receiving the bottom link establishment failure indication, the terminal sends a registration request message, wherein the registration request message includes the 5G-GUTI currently used by the terminal.

In step S805, the N3IWF entity forwards the registration request message to the reselected AMF entity.

Step S806, the reselected AMF entity obtains the 5GMM context information of the terminal from the old AMF entity according to the 5G-GUTI indicated by the registration request message, where the old AMF entity is the AMF entity corresponding to the 5G-GUTI indicated by the registration request message.

The reselected AMF entity transmits a registration accept message including a new 5G-GUTI designated for the terminal to the N3IWF entity at step S807.

In step S808, the N3IWF entity forwards the registration acceptance message to the terminal.

Step S809, the terminal enters the 5GMM connection state through NAS signaling connection success of the non-3 GPP.

As for a specific example of the method for the fourth terminal to enter the connection state, reference may be made to the description of the method for the fourth terminal to enter the connection state, and a description thereof will not be repeated.

In summary, the embodiments of the present application provide various methods for a terminal accessing a 5G core network through a non-3GPP to transition from a 5GMM idle state to a 5GMM connected state, so as to avoid a problem that an AMF entity receiving a service request message of the terminal cannot acquire terminal context information according to an indicated 5G-S-TMSI, so that the terminal accessing the 5G core network through the non-3GPP can successfully register to a new AMF entity and enter the 5GMM connected state.

As shown in fig. 9, based on the same inventive concept, the present embodiment also provides a terminal device, which includes a processor 901, a memory 902, and a transceiver 903, where the processor 901 is responsible for managing the bus architecture and general processing, and the memory 902 may store data used by the processor 901 when performing operations. The transceiver 903 is used for receiving and transmitting data under the control of the processor 901.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 901, and various circuits, represented by memory 902, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface; the processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations.

The process disclosed in the embodiment of the present application may be applied to the processor 901, or implemented by the processor 901. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 901. The processor 901 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, and may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the signal processing flow in combination with the hardware thereof.

The memory 902 is configured to store a program executable by the processor 901, and the processor 901 is configured to read the program in the memory 902 and execute the following steps:

after receiving the bottom layer data link reestablishment instruction, the terminal equipment which is accessed and registered to the 5G core network through the non-3GPP sends a registration request message to the AMF entity through the N3IWF entity, so that the AMF entity obtains the 5GMM context of the terminal equipment according to the 5G-GUTI indicated by the registration request message and then controls the terminal equipment to enter a 5GMM connection state.

Optionally, the processor is further configured to:

after terminal equipment which is accessed and registered to a 5G core network through non-3GPP receives a bottom layer data link reestablishment instruction, before a registration request message is sent to an AMF entity through an N3IWF entity, after a service request message is sent to the AMF entity through the N3IWF entity, the service request message is determined to be rejected by receiving a service rejection message sent by the AMF entity, and the service rejection message comprises a cause value which is indicated by the service request message and can not determine 5GMM context information of the terminal equipment through 5G-S-TMSI.

Optionally, the AMF entity is an AMF entity reselected for the terminal device after determining that there is no AMF entity corresponding to the GUAMI indicated by the terminal device to the bottom layer after the N3IWF entity receives the service request message sent by the terminal device.

Optionally, the processor is further configured to:

after receiving the bottom layer data link reestablishment instruction, the terminal equipment which is accessed and registered to the 5G core network through the non-3GPP confirms to receive the bottom layer link reestablishment failure instruction before sending the registration request message to the AMF entity through the N3IWF entity and after sending the service request message.

Optionally, the underlying link establishment failure indication is sent by the N3IWF entity according to a GUAMI indicated by the terminal device when sending the service request message, after the AMF entity corresponding to the GUAMI cannot be determined by the GUAMI.

As shown in fig. 10, based on the same inventive concept, the present embodiment also provides a communication apparatus including a processor 1001, a memory 1002, and a transceiver 1003, the processor 1001 being responsible for managing a bus architecture and general processes, and the memory 1002 being capable of storing data used by the processor 1001 when performing operations. The transceiver 1003 is used to receive and transmit data under the control of the processor 1001.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 1001, and various circuits, represented by the memory 1002, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface; the processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 may store data used by the processor 1001 in performing operations.

The processes disclosed in the embodiments of the present application may be applied to the processor 1001, or implemented by the processor 1001. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in software form in the processor 1001. The processor 1001 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and completes the steps of the signal processing flow in combination with the hardware thereof.

The memory 1002 is used for storing a program executable by the processor 1001, and the processor 1001 is used for reading the program in the memory 1002 and executing the following steps:

receiving a service request message sent by a terminal which is accessed and registered to a 5G core network through a non-3GPP through an N3IWF entity, if the 5GMM context information of the terminal can not be determined according to the 5G-S-TMSI indicated by the service request message, controlling the terminal to enter a 5GMM connection state after acquiring the 5GMM context information of the terminal from an AMF entity corresponding to GUAMI indicated by a bottom layer when the terminal sends the service request message, wherein the AMF entity corresponding to the GUAMI is an AMF entity for distributing the current 5G-GUTI of the terminal.

Optionally, the communication device receives the service request message for the N3IWF entity, determines that there is no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer, and then reselects the AMF entity for the terminal.

Optionally, the processor is specifically configured to perform:

and after determining the 5GMM context information of the terminal and returning a service acceptance message, appointing a new 5G-GUTI to the terminal through a terminal configuration updating message.

Optionally, the service request message is sent by the terminal to enable the terminal to enter a 5GMM connection state after receiving a bottom layer link reestablishment instruction.

As shown in fig. 11, based on the same inventive concept, the present embodiment also provides a communication device including a processor 1101, a memory 1102, and a transceiver 1103, the processor 1101 being responsible for managing a bus architecture and general processing, and the memory 1102 may store data used by the processor 1101 when performing operations. The transceiver 1103 is used for receiving and transmitting data under the control of the processor 1101.

The bus architecture can include any number of interconnected buses and bridges, with various circuits representing one or more processors, in particular processor 1101, and memory represented by memory 1102 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface; the processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1102 may store data used by the processor 1101 in performing operations.

The processes disclosed in the embodiments of the present application can be applied to the processor 1101, or implemented by the processor 1101. In implementation, the steps of the signal processing flow may be implemented by instructions in the form of hardware, integrated logic circuits, or software in the processor 1101. The processor 1101 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in a processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, etc. as is well known in the art. The storage medium is located in the memory 1102, and the processor 1101 reads the information in the memory 1102 and completes the steps of the signal processing flow in combination with the hardware thereof.

The memory 1102 is configured to store a program executable by the processor 1101, and the processor 1101 is configured to read the program in the memory 1102 and execute the following steps:

receiving a service request message sent by a terminal which is accessed and registered to a 5G core network through a non-3GPP through an N3IWF, wherein the service request message indicates that 5G-S-TMSI exists and is sent after the terminal receives a bottom layer data link reestablishment indication, and the communication equipment determines that an AMF entity corresponding to GUAMI indicated by the terminal to the bottom layer does not exist after the N3IWF entity receives the service request message and then reselects the AMF entity for the terminal;

if the 5GMM context information of the terminal cannot be determined according to the 5G-S-TMSI, sending a service rejection message to the terminal, wherein the service rejection message comprises a cause value that the communication equipment cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message;

As shown in fig. 12, based on the same inventive concept, the present embodiment also provides a communication apparatus including a processor 1201, a memory 1202, and a transceiver 1203, the processor 1201 being responsible for managing a bus architecture and general processing, and the memory 1202 may store data used by the processor 1201 when performing operations. The transceiver 1203 is used to receive and transmit data under the control of the processor 1201.

The bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together in particular by one or more processors, represented by the processor 1201, and by memory, represented by the memory 1202. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface; the processor 1201 is responsible for managing a bus architecture and general processing, and the memory 1202 may store data used by the processor 1201 in performing operations.

The process disclosed in the embodiment of the present application may be applied to the processor 1201, or implemented by the processor 1201. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in software form in the processor 1201. The processor 1201 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1202, and the processor 1201 reads information in the memory 1202 and completes the steps of the signal processing flow in conjunction with hardware thereof.

The memory 1202 is configured to store a program executable by the processor 1201, and the processor 1201 is configured to read the program in the memory 1202 and execute the following steps:

and receiving a registration request message sent by the terminal after receiving the bottom link establishment failure indication, and sending the registration request message to a new AMF entity, so that the new AMF entity obtains the 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message and then controls the terminal to enter a 5GMM connection state, wherein the new AMF entity is an AMF entity reselected for the terminal after the communication equipment receives the service request message and determines that no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer exists.

As shown in fig. 13, based on the same inventive concept, the present embodiment further provides a communication apparatus 1300, including:

a registration triggering unit 1301, configured to send a registration request message to an AMF entity through an N3IWF entity after the communication apparatus registered to the 5G core network through non-3GPP access receives a bottom layer data link reestablishment indication, so that the AMF entity obtains a 5GMM context of the communication apparatus according to the 5G-GUTI indicated by the registration request message and controls the communication apparatus to enter a 5GMM connection state.

Optionally, the registration triggering unit 1301 is further configured to:

after a terminal which is registered to a 5G core network through non-3GPP access receives a bottom layer data link reestablishment instruction, before a registration request message is sent to an AMF entity through an N3IWF entity, after a service request message is sent to the AMF entity through the N3IWF entity, the service request message is determined to be rejected by receiving a service rejection message sent by the AMF entity, and the service rejection message comprises a cause value that the 5G-S-TMSI indicated by the service request message can not determine the 5GMM context information of the terminal.

Optionally, the AMF entity is an AMF entity reselected for the terminal after determining that there is no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer after the N3IWF entity receives the service request message sent by the terminal.

Optionally, the registration triggering unit 1301 is further configured to:

after receiving the bottom layer data link reestablishment indication through the terminal registered to the 5G core network by the non-3GPP access, the terminal determines to receive the bottom layer link reestablishment failure indication before sending the registration request message to the AMF entity through the N3IWF entity and after sending the service request message.

Optionally, the underlying link establishment failure indication is sent by the N3IWF entity according to the GUAMI indicated by the terminal to the underlying layer when the terminal sends the service request message, and after the AMF entity corresponding to the GUAMI cannot be determined.

As shown in fig. 14, based on the same inventive concept, the present embodiment further provides a communication apparatus 1400, including:

an active terminal unit 1401, configured to receive a service request message sent by a terminal registered in a 5G core network through a N3IWF entity through a non-3GPP access, and if the 5GMM context information of the terminal cannot be determined according to the 5G-S-TMSI indicated by the service request message, control the terminal to enter a 5GMM connection state after obtaining the 5GMM context information of the terminal from an AMF corresponding to a GUAMI indicated by a bottom layer when the terminal sends the service request message, where the AMF corresponding to the GUAMI is an AMF entity that allocates a current 5G-GUTI of the terminal.

Optionally, the active terminal unit 1401 is specifically configured to:

Optionally, the service request message is sent by the terminal to enable the terminal to enter a 5GMM connection state after receiving the bottom link reestablishment instruction.

As shown in fig. 15, based on the same inventive concept, the present embodiment also provides a communication apparatus 1500, including:

a service request message receiving unit 1501, configured to receive a service request message sent by an N3IWF through a terminal that is non-3GPP access-registered to a 5G core network, where the service request message indicates that there is a 5G-S-TMSI and the service request message is sent after the terminal receives a bottom data link reestablishment indication, and the communication device is an AMF entity reselected for the terminal after determining that there is no AMF entity corresponding to a GUAMI indicated by the terminal to a bottom layer after the N3IWF entity receives the service request message;

a service request rejecting unit 1502, configured to send a service reject message to the terminal if the 5GMM context information of the terminal cannot be determined according to the 5G-S-TMSI, where the service reject message includes a cause value that the communication device cannot determine the 5GMM context information of the terminal according to the 5G-S-TMSI indicated by the service request message;

and an active terminal unit 1503, configured to receive a registration request message sent by the N3IWF entity after the terminal receives the service reject message, and control the terminal to enter a 5GMM connection state after acquiring a 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message.

As shown in fig. 16, based on the same inventive concept, the present embodiment further provides a communication apparatus 1600, including:

a bottom link establishment failure indication unit 1601, configured to send a bottom link establishment failure indication to a terminal if it is determined that an AMF entity cannot be determined according to GUAMI indicated by the terminal to a bottom after receiving a service request message sent by a terminal registered in a 5G core network through a non-3GPP access, so as to notify the terminal that the AMF entity cannot be determined based on the GUAMI indicated by the terminal, where the service request message is sent after the terminal receives a bottom data link re-establishment indication;

a registration request message forwarding unit 1602, configured to receive a registration request message sent by the terminal after receiving the indication of failed establishment of the underlying link, and send the registration request message to a new AMF entity, so that the new AMF entity controls the terminal to enter a 5GMM connection state after acquiring a 5GMM context of the terminal according to the 5G-GUTI indicated by the registration request message, where the new AMF entity is an AMF entity reselected for the terminal after the communication device receives the service request message and determines that there is no AMF entity corresponding to the GUAMI indicated by the terminal to the underlying link.

The embodiment of the present application further provides a computer-readable non-volatile storage medium, which includes a program code, and when the program code runs on a computing terminal, the program code is configured to enable the computing terminal to execute the steps of the method provided in the embodiment of the present application.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the present application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for a non-3GPP accessed terminal to enter a connection state is characterized by comprising the following steps:

after receiving a bottom layer data link reestablishment instruction through a terminal which is accessed and registered to a 5G core network through non-3GPP, sending a registration request message to an AMF entity through an N3IWF entity so that the AMF entity obtains a 5GMM context of the terminal according to a 5G-GUTI indicated by the registration request message and then controls the terminal to enter a 5GMM connection state;

wherein, after receiving the bottom layer data link reestablishment indication by the terminal registered to the 5G core network through the non-3GPP access, before sending the registration request message to the AMF entity through the N3IWF entity, the method further comprises:

2. The method of claim 1, wherein the AMF entity is an AMF entity reselected for the terminal after determining that there is no AMF entity corresponding to the GUAMI indicated to the bottom layer by the terminal after receiving the service request message sent by the terminal for an N3IWF entity.

3. The method of claim 1, wherein after receiving the underlying data link re-establishment indication, the terminal registered to the 5G core network through the non-3GPP access, and before sending the registration request message to the AMF entity through the N3IWF entity, further comprising:

4. The method of claim 3, wherein the underlying link establishment failure indication is sent by an N3IWF entity according to a GUAMI indicated by the terminal to the underlying layer when sending the service request message, after the AMF entity corresponding to the GUAMI cannot be determined.

5. A method for a non-3GPP accessed terminal to enter a connection state is characterized by comprising the following steps:

an AMF entity receives a service request message sent by a terminal which is accessed and registered to a 5G core network through a non-3GPP through an N3IWF entity, if 5GMM context information of the terminal can not be determined according to 5G-S-TMSI indicated by the service request message, the terminal is controlled to enter a 5GMM connection state after the 5GMM context information of the terminal is acquired from the AMF entity corresponding to GUAMI indicated by a bottom layer when the terminal sends the service request message, and the AMF entity corresponding to the GUAMI is the AMF entity which allocates the current 5G-GUTI of the terminal;

and the AMF entity is the AMF entity reselected for the terminal after the N3IWF entity receives the service request message and determines that no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer exists.

6. The method of claim 5, wherein the AMF entity controlling the terminal to enter a 5GMM connected state comprises:

7. The method of claim 5, wherein the service request message is sent by the terminal to cause the terminal to enter a 5GMM connected state after receiving an underlying link reestablishment indication.

8. A method for a non-3GPP accessed terminal to enter a connection state is characterized by comprising the following steps:

9. A method for a non-3GPP accessed terminal to enter a connection state is characterized by comprising the following steps:

10. A terminal device comprising a processor and a memory, said memory storing a program executable by said processor, said processor being adapted to read the program in said memory and to perform the steps of:

after receiving a bottom layer data link reestablishment instruction through the terminal equipment which is accessed and registered to the 5G core network through the non-3GPP, sending a registration request message to an AMF entity through an N3IWF entity so that the AMF entity controls the terminal equipment to enter a 5GMM connection state after acquiring a 5GMM context of the terminal equipment according to the 5G-GUTI indicated by the registration request message;

after terminal equipment which is accessed and registered to a 5G core network through non-3GPP receives a bottom layer data link reestablishment instruction, before a registration request message is sent to an AMF entity through an N3IWF entity, after a service request message is sent to the AMF entity through the N3IWF entity, the service request message is determined to be rejected by receiving a service rejection message sent by the AMF entity, wherein the service rejection message comprises a cause value that 5G-S-TMSI indicated by the service request message can not determine 5GMM context information of the terminal equipment.

11. The terminal device of claim 10, wherein the AMF entity is an AMF entity reselected for the terminal device after determining that there is no AMF entity corresponding to the GUAMI indicated to the bottom layer by the terminal device after the N3IWF entity receives the service request message sent by the terminal device.

12. The terminal device of claim 10, wherein the processor is further configured to perform:

after receiving the bottom layer data link reestablishment indication through the terminal equipment which is accessed and registered to the 5G core network by the non-3GPP, the terminal equipment determines to receive the bottom layer link reestablishment failure indication before sending the registration request message to the AMF entity through the N3IWF entity and after sending the service request message.

13. The terminal device of claim 12, wherein the underlying link establishment failure indication is sent by an N3IWF entity after an AMF entity corresponding to a GUAMI indicated by the terminal device to the underlying layer according to the GUAMI that the terminal device cannot determine when sending the service request message.

14. A communication device comprising a processor and a memory, said memory storing a program executable by said processor, said processor being adapted to read the program in said memory and to perform the steps of:

receiving a service request message sent by a terminal which is accessed and registered to a 5G core network through a non-3GPP through an N3IWF entity, if the 5GMM context information of the terminal can not be determined according to the 5G-S-TMSI indicated by the service request message, controlling the terminal to enter a 5GMM connection state after acquiring the 5GMM context information of the terminal from an AMF entity corresponding to GUAMI indicated by a bottom layer when the terminal sends the service request message, wherein the AMF entity corresponding to the GUAMI is an AMF entity for distributing the current 5G-GUTI of the terminal;

and the communication equipment receives the service request message for the N3IWF entity, determines that the AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer does not exist, and then reselects the AMF entity for the terminal.

15. The communications device of claim 14, wherein said processor is further configured to perform:

16. The communications device of claim 14, wherein the service request message is sent by the terminal to cause the terminal to enter a 5GMM connected state after receiving an underlying link reestablishment indication.

17. A communication device comprising a processor and a memory, said memory storing a program executable by said processor, said processor being adapted to read the program in said memory and to perform the steps of:

receiving a service request message sent by a terminal which is accessed and registered to a 5G core network through a N3IWF (Internet protocol gateway) by a non-3GPP (generic GPP access), wherein the service request message indicates that 5G-S-TMSI (5G-service provider identity) is contained, the service request message is sent after the terminal receives a bottom layer data link reestablishment indication, and the communication equipment is an AMF entity which is reselected for the terminal after determining that no AMF entity corresponding to GUAMI indicated to the bottom layer by the terminal exists after the N3IWF entity receives the service request message;

18. A communication device comprising a processor and a memory, said memory storing a program executable by said processor, said processor being adapted to read the program in said memory and to perform the steps of:

19. A communications apparatus, comprising:

a registration triggering unit, configured to send a registration request message to an AMF entity through an N3IWF entity after receiving a bottom layer data link reestablishment indication through the communication apparatus registered in a 5G core network by a non-3GPP access, so that the AMF entity obtains a 5GMM context of the communication apparatus according to a 5G-GUTI indicated by the registration request message and controls the communication apparatus to enter a 5GMM connection state;

wherein, after receiving the bottom layer data link reestablishment indication through the non-3GPP access terminal registered to the 5G core network, and before sending the registration request message to the AMF entity through the N3IWF entity, the registration triggering unit is further configured to:

20. A communications apparatus, comprising:

an activation terminal unit, configured to receive a service request message sent by a terminal registered to a 5G core network through an N3IWF entity through non-3GPP access, and if 5GMM context information of the terminal cannot be determined according to 5G-S-TMSI indicated by the service request message, control the terminal to enter a 5GMM connection state after obtaining the 5GMM context information of the terminal from an AMF corresponding to GUAMI indicated by a bottom layer when the terminal sends the service request message, where the AMF corresponding to the GUAMI is an AMF entity that allocates a current 5G-GUTI of the terminal;

and the communication device is an AMF entity reselected for the terminal after the N3IWF entity receives the service request message and determines that no AMF entity corresponding to the GUAMI indicated by the terminal to the bottom layer exists.

21. A communications apparatus, comprising:

a service request message receiving unit, configured to receive a service request message sent by an N3IWF through a terminal that is non-3GPP access-registered to a 5G core network, where the service request message indicates that there is 5G-S-TMSI and the service request message is sent after the terminal receives a bottom layer data link reestablishment indication, and the communication device is an AMF entity that is reselected for the terminal after determining that there is no AMF entity corresponding to an amgui indicated by the terminal to the bottom layer after the N3IWF entity receives the service request message;

22. A communications apparatus, comprising:

23. A computer storage medium on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the steps of the method of any one of claims 1 to 4 or 5 to 7 or 8 or 9.