CN113079590A

CN113079590A - Service area switching processing method and equipment

Info

Publication number: CN113079590A
Application number: CN202010005094.7A
Authority: CN
Inventors: 宋月; 王丹
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2021-07-06
Anticipated expiration: 2040-01-03
Also published as: CN113079590B; WO2021136360A1

Abstract

The embodiment of the invention provides a service area switching processing method and equipment, wherein the method comprises the following steps: receiving a switching request; acquiring a session management context of a PDU session corresponding to a first DNN of a terminal, and sending a relocation request to an MME, wherein the relocation request comprises: a session management context of a PDU session corresponding to the first DNN; wherein the DNN currently accessed by the terminal comprises the first DNN, and the service area of the first DNN comprises a handover target area. In the embodiment of the present invention, since the service area of the first DNN includes the handover target area, when the terminal enters the handover target area, the PDU session continuity of the terminal can be ensured by the acquired PDU session corresponding to the first DNN.

Description

Service area switching processing method and equipment

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a service area switching processing method and equipment.

Background

The industry network application is a main application scene of the fifth generation mobile communication technology (5th generation, 5G), and for the garden industry network, "the regional nature of the service" is one of the important characteristics, that is, a user can only use a specific service in a limited area. In a real-world scenario, the service regionality becomes complex, that is, for services on the same terminal, some services can be used only in a limited area, and some services can be used outside the area.

Referring to fig. 1, a user has simultaneous voice service and data service in a campus, and when the user moves out of the campus, the user can continue to use the voice service according to a service policy, but cannot use the data service due to enterprise data security.

At present, a Data Network Name (DNN) and a corresponding service Area (Tracking Area (TA) list) are configured on an Access and Mobility Management Function (AMF), and if the service Area of the DNN currently accessed by a terminal does not include a handover target Area, when the terminal enters the handover target Area, a PDU session of the terminal may be interrupted.

Disclosure of Invention

An object of the embodiments of the present invention is to provide a method and a device for handling service area handover, which solve the problem of how to ensure the continuity of a terminal PDU session.

In a first aspect, an embodiment of the present invention provides a service area handover processing method, applied to an AMF, including:

receiving a switching request;

acquiring a session management context of a PDU session corresponding to a first DNN of a terminal, and sending a relocation request to a mobility management entity MME, wherein the relocation request comprises: a session management context of a PDU session corresponding to the first DNN;

the DNN currently accessed by the terminal comprises: the first DNN, a service area of the first DNN comprising a handover target area.

Optionally, the method further comprises:

sending a session management context acquisition request to the SMF, wherein the session management context acquisition request comprises: an identifier of a session management context of the PDU session corresponding to the first DNN;

receiving a session management context of a PDU session corresponding to the first DNN sent by the SMF;

wherein the DNN currently accessed by the terminal further includes: a second DNN, a service area of which does not include the handover target area.

Optionally, the method further comprises:

sending a PDU session management context release request to the SMF, wherein the PDU session management context release request comprises: and the identification of the session management context of the PDU session corresponding to the second DNN.

Optionally, the session management context obtaining request further includes: indication information indicating: whether the service area corresponding to the DNN related to the session management context includes a handover target area.

Optionally, the method further comprises:

receiving a failure message sent by the SMF according to the indication information;

wherein the failure message indicates that the session management context for acquiring the PDU session corresponding to the second DNN fails.

Optionally, before sending the session management context acquisition request of the PDU session to the SMF, the method further includes:

and determining whether a service area corresponding to the DNN currently accessed by the terminal contains the handover target area.

Optionally, the determining whether a service area corresponding to a DNN currently accessed by the terminal includes the handover target area includes:

determining whether a service area corresponding to the DNN currently accessed by the terminal contains the switching target area or not according to the active DNN list, the identification of the switching target area and the service area information;

the service area information represents the corresponding relation between the DNN and the service area identifier.

In a second aspect, an embodiment of the present invention further provides a service area handover processing method, applied to an SMF, including:

sending a session management context of a PDU session corresponding to a first DNN of a terminal to an AMF;

the DNN currently accessed by the terminal comprises: the first DNN, a service area of the first DNN including a handover target area.

Optionally, the sending, to the AMF, a session management context of the PDU session corresponding to the first DNN includes:

receiving a session management context get request from the AMF, the session management context get request comprising: an identifier of a session management context of the PDU session corresponding to the first DNN;

sending a session management context of a PDU session corresponding to a first DNN to the AMF according to the session management context acquisition request;

Optionally, the method further comprises:

receiving a PDU session management context release request sent by the AMF, wherein the PDU session management context release request comprises: an identifier of a session management context of the PDU session corresponding to the second DNN;

and releasing the PDU session corresponding to the second DNN, or keeping the PDU session corresponding to the second DNN.

Optionally, the method further comprises:

keeping the PDU session corresponding to the second DNN according to a pre-configured strategy; or initiating a PDU session release process corresponding to the second DNN.

Optionally, the preconfigured policy is configured locally by the SMF; or from the policy control function PCF.

Optionally, the method further comprises:

sending a failure message to the AMF;

In a third aspect, an embodiment of the present invention further provides an AMF, including:

a first receiving module, configured to receive a handover request;

a first sending module, configured to obtain a session management context of a PDU session corresponding to a first DNN of a terminal, and send a relocation request to an MME, where the relocation request includes: a session management context of a PDU session corresponding to the first DNN;

wherein the DNN currently accessed by the terminal comprises the first DNN, and the service area of the first DNN comprises a handover target area.

In a fourth aspect, an embodiment of the present invention further provides an AMF, including: a first transceiver and a first processor;

the first transceiver is used for receiving a switching request;

the first transceiver is further configured to acquire a session management context of a PDU session corresponding to a first DNN of a terminal, and send a relocation request to an MME, where the relocation request includes: a session management context of a PDU session corresponding to the first DNN;

In a fifth aspect, an embodiment of the present invention further provides an SMF, including:

the second sending module is used for sending the session management context of the PDU session corresponding to the first DNN of the terminal to the AMF;

In a sixth aspect, an embodiment of the present invention further provides an SMF, including: a second transceiver and a second processor;

the second transceiver is used for sending the session management context of the PDU session corresponding to the first DNN of the terminal to the AMF;

In a seventh aspect, an embodiment of the present invention further provides a communication device, including: a processor, a memory and a program stored on the memory and executable on the processor, which program, when executed by the processor, performs steps comprising the service area handover handling method as set forth in the first aspect.

In an eighth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps of the service area handover processing method according to the first aspect.

In the embodiment of the invention, because the service area of the first DNN comprises the handover target area, when the terminal enters the handover target area, the PDU session corresponding to the first DNN is acquired, so that the continuity of the PDU session of the terminal is ensured.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a diagram illustrating network coverage;

FIG. 2 is a second schematic diagram of network coverage;

fig. 3 is a flowchart of a service area switching processing method according to an embodiment of the present invention;

fig. 4 is a second flowchart of a service area handover processing method according to an embodiment of the present invention;

fig. 5 is a third flowchart of a service area handover processing method according to an embodiment of the present invention;

FIG. 6 is a fourth flowchart of a service area switching processing method according to an embodiment of the present invention;

FIG. 7 is a fifth flowchart of a service area switching processing method according to an embodiment of the present invention;

fig. 8 is a sixth flowchart of a service area switching processing method according to an embodiment of the present invention;

fig. 9 is a seventh flowchart of a service area switching processing method according to an embodiment of the present invention;

FIG. 10 is one of the schematic diagrams of an AMF according to an embodiment of the invention;

FIG. 11 is a second schematic diagram of an AMF according to an embodiment of the invention;

FIG. 12 is one of the schematic diagrams of an SMF of an embodiment of the present invention;

FIG. 13 is a second schematic diagram of an SMF according to an embodiment of the invention;

fig. 14 is a schematic diagram of a network device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The techniques described herein are not limited to Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems.

The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership Project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies.

Referring to fig. 3, an embodiment of the present invention provides a service area handover processing method, where an execution subject of the method may be an Access and Mobility Management Function (AMF), and the method includes: step 301 and step 302.

Step 301: receiving a handover request (handed required);

in an embodiment of the present invention, a handover request is used to request a handover from a source area (e.g., a source cell) to a target area (e.g., a target cell).

The third Generation Partnership Project (3 GPP) has defined a Local Area Data Network (LADN) for 5G, a feature that can implement the service Area restriction inside 5G. The purpose is to enable the terminal to use DNN only in a specific geographical area. Wherein the geographical Area is described in the network by a Tracking Area (TA) list. For example, the network type of the source area supports the LADN feature, for example, the network type of the source area is 5G, and the network type of the target area does not support the LADN feature, for example, the network type of the target area is fourth generation mobile communication technology (4G), but the invention is not limited thereto. Referring to fig. 2, in the coverage scenario shown in fig. 2, if the user moves outside the campus, the network side cannot determine the LADN, because the Packet Core Evolution (EPC) does not support the LADN feature.

It is understood that DNNs can be divided into two categories, one being LADN-dependent DNNs and LADN-independent DNNs. For a DNN associated with a LADN, the service area of which includes a particular TA or TAs, configured in the AMF; for a DNN that is not LADN dependent, its service area may be considered to contain all TAs.

Optionally, the handover request includes: the identity of the handover target area, for example: tracking Area Identity (TAI).

Step 302: acquiring a session management context (SM context) of a Packet Data Unit (PDU) session corresponding to a first Data Network Name (DNN) of a terminal, and sending a relocation request (relocation request) to a Mobility Management Entity (MME), wherein the relocation request comprises: a session management context of a PDU session corresponding to the first DNN;

In the embodiment of the present invention, the service area may be understood as an area providing a LADN service, that is, the service area corresponds to a LADN range. The service area of the first DNN currently accessed by the terminal comprises a switching target area which is equivalent to the available range of the terminal in the LADN (or the terminal is in the LADN service area), and the service area of the second DNN currently accessed by the terminal does not comprise a switching target area which is equivalent to the available range of the terminal not in the LADN (or the terminal is out of the LADN service area).

In the embodiment of the present invention, the handover target area may be understood as a handover target tracking area, and the handover target tracking area may cover one or more handover target cells.

Referring to fig. 4, an embodiment of the present invention provides a service area handover processing method, where an execution subject of the method may be an AMF, including: step 401, step 402, step 403 and step 404.

Step 401: receiving a switching request;

step 402: sending a Session Management context acquisition request to a Session Management Function (SMF), the Session Management context acquisition request including: an identification of a session management context (e.g., SmContextRef) of the PDU session to which the first DNN corresponds;

the DNN currently accessed by the terminal comprises: a first DNN and a second DNN, a service area of the first DNN including a handover target area, a service area of the second DNN not including the handover target area. Since the service area of the second DNN does not include the handover target area, in order to avoid that the limitation of the user use area cannot be realized after the handover, the handover of the PDU session corresponding to the second DNN needs to be limited, that is, only the PDU session corresponding to the first DNN is handed over.

It can be understood that the AMF may determine whether the service area corresponding to the DNN currently accessed by the terminal includes the handover target area, and only acquire the session management context of the PDU session corresponding to the first DNN, that is, only acquire the session management context of the PDU session that can be handed over, from the SMF.

Optionally, before step 402, the method shown in fig. 4 may further include: and determining whether a service area corresponding to the DNN currently accessed by the terminal contains the handover target area.

For example: determining whether a service area corresponding to the DNN currently accessed by the terminal contains the switching target area or not according to the active DNN list, the identification of the switching target area and the service area information;

The active DNN list includes information about one or more active DNNs, where an active DNN refers to a DNN with a PDU session established, for example: and 10 DNNs, wherein the PDU sessions are established by DNN1, DNN2 and DNN3, and the PDU sessions are not established by DNN4-DNN10, and the related information of DNN1, DNN2 and DNN3 is included in the active DNN list.

For example, the session management context acquisition request may be Nsmf _ pdusesion _ ContextRequest, but is not limited thereto.

Step 403: receiving a session management context of a PDU session corresponding to the first DNN sent by the SMF;

step 404: sending a relocation request to an MME, wherein the relocation request comprises: a session management context of a PDU session corresponding to the first DNN;

in some embodiments, after handover is completed, the AMF sends a PDU session release request to the SMF, the PDU session release request comprising: the identifier of the PDU session corresponding to the second DNN, that is, the AMF, may initiate a release procedure for the unswitched PDU session.

In the embodiment of the present invention, since the service area of the first DNN includes the handover target area, when the terminal enters the handover target area, the PDU session continuity of the terminal is ensured by the acquired PDU session corresponding to the first DNN, and further, in the embodiment of the present invention, the PDU session handover corresponding to the second DNN may be limited, because the service area of the second DNN does not include the handover target area, in order to avoid that the limitation of the user use area cannot be realized after the handover, at this time, the handover of the PDU session corresponding to the second DNN needs to be limited.

Referring to fig. 5, an embodiment of the present invention provides a service area handover processing method, where an execution subject of the method may be an AMF, including: step 501, step 502, step 503 and step 504.

Step 501: receiving a switching request;

step 502: sending a session management context acquisition request to a Session Management Function (SMF), wherein the session management context acquisition request comprises: an identification (e.g., smccontextref) of a session management context of the PDU session to which the first DNN corresponds, and indication information indicating: whether a service area corresponding to the DNN related to the session management context contains a switching target area or not;

it is to be understood that the indication information may be one-bit information, for example, "1" indicates that the service area corresponding to the DNN currently accessed by the terminal includes the handover target area, and "0" indicates that the service area corresponding to the DNN currently accessed by the terminal does not include the handover target area, which is not limited thereto.

Optionally, before step 502, further comprising: and determining whether a service area corresponding to the DNN currently accessed by the terminal contains the handover target area.

Step 503: receiving a session management context of a PDU session corresponding to the first DNN sent by the SMF;

step 504: sending a relocation request to an MME, wherein the relocation request comprises: a session management context of a PDU session corresponding to the first DNN;

it can be understood that, in the embodiment shown in fig. 5, the AMF initiates, for each active PDU session, an acquisition request of a session management context, where the acquisition request includes indication information indicating whether a service area corresponding to a DNN currently accessed by the terminal includes a handover target area.

Wherein, for the indication information indicating that the service area corresponding to the DNN currently accessed by the terminal contains the handover target area, the SMF can reply the session management context of the PDU session corresponding to the DNN; and for the indication information indicating that the service area corresponding to the DNN currently accessed by the terminal does not contain the handover target area, the SMF may reply a failure response.

In some embodiments, the method further comprises: receiving a failure message sent by the SMF according to the indication information; wherein the failure message indicates that the session management context for acquiring the PDU session corresponding to the second DNN fails.

Referring to fig. 6, an embodiment of the present invention further provides a service area handover processing method, where an execution subject of the method is an SMF, and the method specifically includes: step 601.

Step 601: sending a session management context of a PDU session corresponding to a first DNN of a terminal to an AMF;

Referring to fig. 7, an embodiment of the present invention further provides a service area handover processing method, where an execution subject of the method is an SMF, and the method specifically includes: step 701 and step 702.

Step 701: receiving a session management context get request from the AMF, the session management context get request comprising: an identifier of a session management context of the PDU session corresponding to the first DNN;

the DNN currently accessed by the terminal comprises: a first DNN and a second DNN, a service area of the first DNN including a handover target area, a service area of the second DNN not including the handover target area. Since the service area of the second DNN does not include the handover target area, in order to avoid that the limitation of the user use area cannot be realized after the handover, the handover of the PDU session corresponding to the second DNN needs to be limited.

Step 702: according to the session management context acquisition request, sending the session management context of the PDU session corresponding to the first DNN to the AMF

In some embodiments, after the handover is completed, the method may further include: receiving a PDU session release request sent by the AMF, wherein the PDU session release request comprises: an identifier of a PDU session corresponding to the second DNN; and releasing the PDU session corresponding to the second DNN, or keeping the PDU session corresponding to the second DNN.

Referring to fig. 8, an embodiment of the present invention further provides a service area handover processing method, where an execution subject of the method is an SMF, and the method specifically includes: step 801 and step 802.

Step 801: receiving a session management context get request from the AMF, the session management context get request comprising: identification and indication information of a session management context of a PDU session corresponding to a first DNN, wherein the indication information indicates: whether a service area corresponding to the DNN related to the session management context contains a switching target area or not;

Step 802: according to the session management context acquisition request, sending the session management context of the PDU session corresponding to the first DNN to the AMF

The DNN currently accessed by the terminal comprises: the first DNN and a second DNN, a service area of the first DNN including a handover target area, a service area of the second DNN not including the handover target area.

In some embodiments, after the handover is completed, the method may further include: keeping the PDU session corresponding to the second DNN according to a pre-configured strategy; or initiating a PDU session release process corresponding to the second DNN. Further, the preconfigured policy is locally configured by the SMF; or from a Policy Control Function (PCF).

In some embodiments, for an unswitched PDU session, the method shown in fig. 8 may further include: sending a failure message to the AMF; wherein the failure message indicates that the session management context for acquiring the PDU session corresponding to the second DNN fails.

The following description is given by taking a scheme of service area limitation in a 5G to 4G interoperation scenario as an example, and with reference to fig. 9, the method includes the following steps:

step 901: the AMF configures service area information.

The service area information configured locally by the AMF includes: DNNs and corresponding TAI lists, from which the AMF determines the service area of each DNN.

Step 902: when a handover of 5G to 4G needs to be performed, a next generation radio access network (NG-RAN) transmits a handover request message to the AMF.

Further, the handover request message includes: identification of target base station (eNB ID) and target TAI. The AMF extracts the target TAI from the Handover Required message.

Step 903: the AMF determines whether the target tracking area is within the service area.

The AMF generates an active DNN list related to the UE according to the information stored when the UE establishes the PDU session, and then generates table 1 by combining the service area information in step 501 and the target TAI.

Table 1:

active DNN identification	Whether the target cell is within the service area
		DNN1	Is that
DNN 2	Whether or not
		……	……

Step 904: the AMF communicates an indication to the SMF whether the subscriber is in the service area.

In the handover process, the AMF needs to obtain current PDU session context information of the UE from the SMF, for transmitting to a target Mobility Management Entity (MME).

For example, the AMF sends a HyperText Transfer Protocol (HTTP) request message through the servitization interface as follows:

POST/nsmf-pdusession/{apiVersion}/sm-contexts/{smContextRef}/retrieve

the message body carried by the HTTP request message is a smcontextrietveda type JSON structure, which carries input parameters related to the context obtaining operation.

Optionally, an attribute "targetwithservingarea" is added in the smcontextrerievedata data structure, which contains table 1.

Step 905: the SMF returns the session management context for the PDU session to the AMF.

After receiving the session management context acquisition request of the PDU session of the AMF, the SMF determines the PDU session which can be switched according to the attribute content of the targetWithServingArea, and only returns the session management context of the PDU session which can be switched to the AMF:

for example, the targetwithservingarea attribute contains the following table 2.

Table 2:

DNN identification	Whether the target cell is within the service area
		DNN1	Is that
DNN2	Whether or not
		DNN3	Is that

Then, SMF only contains session management context for DNN1 and DNN3 related PDU sessions in the response message.

Step 906: the SMF processes the non-switched PDU session.

For the PDU session without handover, the SMF may perform the following operations DNN by DNN according to a preset policy:

1) keeping PDU conversation for subsequent user to return to service area; alternatively, the first and second electrodes may be,

2) SMF initiates a PDU session release flow to remove the un-switched PDU session. For example, the SMF may wait for a certain time according to a preset policy and then initiate a PDU session release.

Alternatively, the SMF may obtain the preset policy as follows:

1) local configuration; alternatively, the first and second electrodes may be,

2) the relevant policy is obtained by the PCF.

In the embodiment of the invention, the service area limitation from a network supporting the LADN characteristic to a network not supporting the LADN characteristic under the network interoperation scene can be realized, and the reliability of the communication system is improved.

Referring to fig. 10, an embodiment of the present invention provides an AMF1000 including:

a first receiving module 1001, configured to receive a handover request;

a first sending module 1002, configured to send a relocation request to an MME when a session management context of a PDU session corresponding to a first DNN of a terminal is acquired, where the relocation request includes: a session management context of a PDU session corresponding to the first DNN;

In some embodiments, the first sending module 1002 is further configured to: sending a session management context acquisition request to the SMF, wherein the session management context acquisition request comprises: an identifier of a session management context of the PDU session corresponding to the first DNN; the first receiving module 1001 is further configured to: receiving a session management context of a PDU session corresponding to the first DNN sent by the SMF; wherein the DNN currently accessed by the terminal further includes: a second DNN, a service area of which does not include the handover target area.

In some embodiments, the first sending module 1002 is further configured to: sending a PDU session release request to the SMF, wherein the PDU session release request comprises: and the PDU session corresponding to the second DNN is identified.

In some embodiments, the session management context acquisition request further comprises: indication information indicating: whether the service area corresponding to the DNN related to the session management context includes a handover target area.

In some embodiments, the first receiving module 1001 is further configured to: receiving a failure message sent by the SMF according to the indication information; wherein the failure message indicates that the session management context for acquiring the PDU session corresponding to the second DNN fails.

In some embodiments, AMF1000 further comprises: a determining module, configured to determine whether a service area corresponding to a DNN currently accessed by the terminal includes the handover target area.

In some embodiments, the determining module is further configured to: the terminal is used for determining whether a service area corresponding to the DNN currently accessed by the terminal contains the switching target area or not according to the active DNN list, the identification of the switching target area and the service area information; the service area information represents the corresponding relation between the DNN and the service area identifier.

The AMF provided by the embodiment of the present invention may implement the method embodiments shown in fig. 3, fig. 4, or fig. 5, which have similar implementation principles and technical effects, and this embodiment is not described herein again.

Referring to fig. 11, an embodiment of the present invention provides an AMF1100, which includes: a first transceiver 1101 and a first processor 1102;

a first transceiver 1101 for receiving a handover request;

the first transceiver 1101 is further configured to acquire a session management context of a PDU session corresponding to a first DNN of a terminal, and send a relocation request to an MME, where the relocation request includes: a session management context of a PDU session corresponding to the first DNN;

In some embodiments, the first transceiver 1101 is further configured to: sending a session management context acquisition request to the SMF, wherein the session management context acquisition request comprises: an identifier of a session management context of the PDU session corresponding to the first DNN; the first transceiver 1101 is further configured to: receiving a session management context of a PDU session corresponding to the first DNN sent by the SMF; wherein the DNN currently accessed by the terminal further includes: a second DNN, a service area of which does not include the handover target area.

In some embodiments, the first transceiver 1101 is further configured to: sending a PDU session release request to the SMF, wherein the PDU session release request comprises: and the PDU session corresponding to the second DNN is identified.

In some embodiments, the first transceiver 1101 is further configured to: receiving a failure message sent by the SMF according to the indication information; wherein the failure message indicates that the session management context for acquiring the PDU session corresponding to the second DNN fails.

In some embodiments, the first processor 1102 is configured to determine whether a service area corresponding to a DNN currently accessed by the terminal includes the handover target area.

In some embodiments, the first processor 1102 is further configured to: the terminal is used for determining whether a service area corresponding to the DNN currently accessed by the terminal contains the switching target area or not according to the active DNN list, the identification of the switching target area and the service area information; the service area information represents the corresponding relation between the DNN and the service area identifier.

Referring to fig. 12, an embodiment of the present invention further provides an SMF, where the SMF1200 includes:

a second sending module 1201, configured to send, to the AMF, a session management context of a PDU session corresponding to the first DNN of the terminal;

In some embodiments, SMF1200 further comprises: a second receiving module, configured to receive a session management context obtaining request from the AMF, where the session management context obtaining request includes: an identifier of a session management context of the PDU session corresponding to the first DNN;

a second sending module 1201, configured to send, to the AMF, a session management context of the PDU session corresponding to the first DNN according to the session management context acquisition request; wherein the DNN currently accessed by the terminal further includes: a second DNN, a service area of which does not include the handover target area.

In some embodiments, SMF1200 further comprises: a third receiving module, configured to receive a PDU session release request sent by the AMF, where the PDU session release request includes: an identifier of a PDU session corresponding to the second DNN; and releasing the PDU session corresponding to the second DNN, or keeping the PDU session corresponding to the second DNN.

In some embodiments, SMF1200 further comprises: a processing module, configured to maintain a PDU session corresponding to the second DNN according to a preconfigured policy; or initiating a PDU session release process corresponding to the second DNN.

In some embodiments, the preconfigured policy is configured locally by the SMF; or, it is acquired from the PCF.

In some embodiments, the second sending module 1201 is further configured to send a failure message to the AMF; wherein the failure message indicates that the session management context for acquiring the PDU session corresponding to the second DNN fails.

The SMF provided in the embodiment of the present invention may implement the method embodiments shown in fig. 6, fig. 7, and fig. 8, which have similar implementation principles and technical effects, and this embodiment is not described herein again.

Referring to fig. 13, an embodiment of the present invention further provides an SMF, where the SMF1300 includes: a second transceiver 1301 and a second processor 1302;

a second transceiver 1301, configured to send, to the AMF, a session management context of a PDU session corresponding to the first DNN of the terminal;

In some embodiments, the second transceiver 1301 is further configured to receive a session management context acquisition request from the AMF, where the session management context acquisition request includes: an identifier of a session management context of the PDU session corresponding to the first DNN;

the second transceiver 1301 is further configured to send, to the AMF, a session management context of the PDU session corresponding to the first DNN according to the session management context acquisition request; wherein the DNN currently accessed by the terminal further includes: a second DNN, a service area of which does not include the handover target area.

In some embodiments, the second transceiver 1301 is further configured to receive a PDU session release request sent by the AMF, where the PDU session release request includes: an identifier of a PDU session corresponding to the second DNN; and releasing the PDU session corresponding to the second DNN, or keeping the PDU session corresponding to the second DNN.

In some embodiments, the second processor 1302 is configured to maintain a PDU session corresponding to the second DNN according to a preconfigured policy; or initiating a PDU session release process corresponding to the second DNN.

In some embodiments, the preconfigured policy is configured locally by the SMF; or from the policy control function PCF.

In some embodiments, the second transceiver 1301 is further configured to send a failure message to the AMF; wherein the failure message indicates that the session management context for acquiring the PDU session corresponding to the second DNN fails.

Referring to fig. 14, fig. 14 is a structural diagram of a communication device applied in the embodiment of the present invention, as shown in fig. 14, the communication device 1400 includes: a processor 1401, a transceiver 1402, a memory 1403, and a bus interface, wherein the processor 1401 may be responsible for managing the bus architecture and general processing. The memory 1403 may store data used by the processor 1401 in performing operations.

In one embodiment of the present invention, the communication device 1400 further comprises: a program stored on the memory 1403 and executable on the processor 1401, which program, when executed by the processor 1401, implements the steps in the methods illustrated above in fig. 3, 4, 5, 6, 7 or 8.

In fig. 14, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1401, and various circuits, represented by memory 1403, 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 transceiver 1402 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The communication device provided in the embodiment of the present invention may execute the method embodiments shown in fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, or fig. 8, which have similar implementation principles and technical effects, and this embodiment is not described herein again.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above method for adjusting a computing resource configuration, and can achieve the same technical effect, and in order to avoid repetition, the detailed description is omitted here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or may be embodied in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable hard disk, a compact disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may be carried in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, 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, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the embodiments 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 encompass such modifications and variations.

Claims

1. A service area switching processing method is applied to an access and mobility management function (AMF), and is characterized by comprising the following steps:

receiving a switching request;

acquiring a session management context of a Packet Data Unit (PDU) session corresponding to a first Data Network Name (DNN) of a terminal, and sending a relocation request to a Mobility Management Entity (MME), wherein the relocation request comprises: a session management context of a PDU session corresponding to the first DNN;

2. The method of claim 1, further comprising:

sending a session management context acquisition request to a Session Management Function (SMF), wherein the session management context acquisition request comprises: an identifier of a session management context of the PDU session corresponding to the first DNN;

3. The method of claim 2, further comprising:

4. The method of claim 2, wherein the session management context get request further comprises: indication information indicating: whether the service area corresponding to the DNN related to the session management context includes a handover target area.

5. The method of claim 4, further comprising:

6. The method of claim 2, wherein prior to sending the session management context acquisition request for the PDU session to the SMF, the method further comprises:

7. The method of claim 6, wherein the determining whether the service area corresponding to the DNN currently accessed by the terminal includes the handover target area comprises:

8. A service area switching processing method is applied to SMF, and is characterized by comprising the following steps:

9. The method of claim 8, wherein sending the session management context for the PDU session corresponding to the first DNN to the AMF comprises:

10. The method of claim 9, further comprising:

11. The method of claim 9, wherein the session management context get request further comprises: indication information indicating: whether the service area corresponding to the DNN related to the session management context includes a handover target area.

12. The method of claim 11, further comprising:

13. The method of claim 12, wherein the preconfigured policy is locally configured by the SMF; or from the policy control function PCF.

14. The method of claim 11, further comprising:

sending a failure message to the AMF;

15. An AMF, comprising:

a first receiving module, configured to receive a handover request;

16. An AMF, comprising: a first transceiver and a first processor;

the first transceiver is used for receiving a switching request;

17. An SMF, comprising:

18. An SMF, comprising: a second transceiver and a second processor;

19. A communication device, comprising: processor, memory and program stored on the memory and executable on the processor, which when executed by the processor implements steps comprising a service area switching processing method as claimed in any one of claims 1 to 14.

20. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out steps comprising the service area handover processing method according to any one of claims 1 to 14.