CN116074903A - Session establishment method, apparatus and storage medium - Google Patents

Session establishment method, apparatus and storage medium Download PDF

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Publication number
CN116074903A
CN116074903A CN202111290857.8A CN202111290857A CN116074903A CN 116074903 A CN116074903 A CN 116074903A CN 202111290857 A CN202111290857 A CN 202111290857A CN 116074903 A CN116074903 A CN 116074903A
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user equipment
network element
network
subscription information
hss
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黄明霞
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ZTE Corp
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ZTE Corp
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Priority to CN202111290857.8A priority Critical patent/CN116074903A/en
Priority to PCT/CN2022/122432 priority patent/WO2023078007A1/en
Publication of CN116074903A publication Critical patent/CN116074903A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to the technical field of communication, in particular to a session establishment method, equipment and a storage medium, when slice subscription information corresponding to user equipment is not queried, namely the user equipment switches networks for the first time, a 5G network registration account opening template corresponding to the user equipment is preferentially returned to an AMF network element, so that the AMF network element obtains PDN connection information of the user equipment. And then after the AMF network element acquires the PDN connection information, sending a 5G registration account opening instruction corresponding to the user equipment to the HSS network element, and triggering a deletion instruction of the PDN connection information at the same time, thereby ensuring that the PDN connection information is deleted after the AMF network element acquires the PDN connection information, avoiding the reconstruction of a 5G network session, improving the session establishment efficiency of the user equipment when the network is switched for the first time, and improving the user experience.

Description

Session establishment method, apparatus and storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a session establishment method, apparatus, and storage medium.
Background
With the development of communication technology, networks in the fifth generation communication system (The Fifth Generation, 5G) introduce the concept of Slicing (slicking), where network Slicing mainly creates multiple independent proprietary virtual sub-networks in the same infrastructure to meet the requirements of different services. When the ue moves to the coverage area of the 5G network, the ue is handed over from the network in the fourth generation communication system (The Fourth Generation, 4G) to the 5G network. When the user equipment is switched from the 4G network to the 5G network, the network switching is completed based on the established PDN connection in the 4G network and the network slice corresponding to the user equipment. However, when the user equipment performs the switching between the 4G network and the 5G network for the first time, the user equipment needs to perform the 5G network registration and account opening, and when the user equipment performs the 5G network registration and account opening, the 5G network session needs to be rebuilt, which results in low session establishment efficiency during the first network switching.
Disclosure of Invention
The invention provides a session establishment method, equipment and a storage medium, when user equipment switches networks for the first time, namely slice subscription information corresponding to the user equipment is not queried, a 5G network registration account opening template corresponding to the user equipment is preferentially returned to an AMF network element, so that the AMF network element obtains PDN connection information of the user equipment. And then after the AMF network element acquires the PDN connection information, sending a 5G registration account opening instruction corresponding to the user equipment to the HSS network element, and triggering a deletion instruction of the PDN connection information at the same time, thereby avoiding deleting the PDN connection information before the AMF network element acquires the PDN connection information, avoiding reestablishing a 5G network session, improving the session establishment efficiency of the user equipment when the network is switched for the first time, and improving the user experience.
In a first aspect, the present invention provides a session establishment method, the method comprising:
when a 5G network registration request sent by an AMF network element is received, acquiring a query result of first slicing subscription information of user equipment based on a user equipment identifier in the 5G network registration request;
if the query result is that the first slice subscription information does not exist, determining a 5G network registration account opening template corresponding to the user equipment identifier in an HSS network element;
sending second slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element establishes a PDU session corresponding to the user equipment in a 5G network based on context information corresponding to the user equipment and the second slice subscription information, wherein the context information comprises PDN connection information established by the user equipment in a 4G network;
after the AMF network element obtains the context information corresponding to the user equipment, a 5G registration account opening instruction corresponding to the user equipment is sent to the HSS network element so that the HSS network element can update the subscription information corresponding to the user equipment, wherein the update of the subscription information comprises deleting the PDN connection information established in the 4G network by the user equipment.
In a second aspect, the present invention also provides a session establishment apparatus comprising a memory, a processor, a program stored on the memory and executable on the processor, and a data bus for enabling a connection communication between the processor and the memory, the program when executed by the processor implementing a session establishment method as described above.
In a third aspect, the present invention also provides a storage medium for readable storage, the storage medium storing one or more programs executable by one or more processors to implement a session establishment method as described above.
The invention discloses a session establishment method, equipment and a storage medium, wherein when a 5G network registration request sent by an AMF network element is received, a query result of first slicing subscription information of user equipment is obtained based on a user equipment identifier in the 5G network registration request; if the query result is that the first slice subscription information does not exist, determining a 5G network registration account opening template corresponding to the user equipment identifier in an HSS network element; sending second slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element establishes a PDU session corresponding to the user equipment in a 5G network based on context information corresponding to the user equipment and the second slice subscription information, wherein the context information comprises PDN connection information established by the user equipment in a 4G network; after the AMF network element obtains the context information corresponding to the user equipment, a 5G registration account opening instruction corresponding to the user equipment is sent to the HSS network element so that the HSS network element can update the subscription information corresponding to the user equipment, wherein the update of the subscription information comprises deleting the PDN connection information established in the 4G network by the user equipment. By the method, when the user equipment switches the network for the first time, namely the slice subscription information corresponding to the user equipment is not queried, the 5G network registration account opening template corresponding to the user equipment is preferentially returned to the AMF network element, so that the AMF network element acquires the PDN connection information of the user equipment. And then after the AMF network element acquires the PDN connection information, sending a 5G registration account opening instruction corresponding to the user equipment to the HSS network element, and triggering a deletion instruction of the PDN connection information at the same time, thereby avoiding deleting the PDN connection information before the AMF network element acquires the PDN connection information, avoiding reestablishing a 5G network session, improving the session establishment efficiency of the user equipment when the network is switched for the first time, and improving the user experience.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a session establishment device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a session establishment method provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of a session establishment procedure according to an embodiment of the present invention.
The embodiment of the invention provides a schematic flow chart of the step of comparing the current gesture information with the target trigger condition.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the following description, suffixes such as "module", "part" or "unit" for representing elements are used only for facilitating the description of the present invention, and have no particular meaning in themselves. Thus, "module," "component," or "unit" may be used in combination.
The embodiment of the invention provides a session establishment method, equipment and a storage medium, when user equipment switches networks for the first time, namely slice subscription information corresponding to the user equipment is not queried, a 5G network registration account opening template corresponding to the user equipment is preferentially returned to an AMF network element, so that the AMF network element obtains PDN connection information of the user equipment. And then after the AMF network element acquires the PDN connection information, sending a 5G registration account opening instruction corresponding to the user equipment to the HSS network element, and triggering a deletion instruction of the PDN connection information at the same time, thereby avoiding deleting the PDN connection information before the AMF network element acquires the PDN connection information, avoiding reestablishing a 5G network session, improving the session establishment efficiency of the user equipment when the network is switched for the first time, and improving the user experience.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a session establishment device according to an embodiment of the present invention. The session establishment device 100 may comprise a processor 101 and a memory 102, wherein the processor 101 and the memory 102 may be connected by a bus, such as any suitable bus, e.g. an I2C (Inter-integrated Circuit) bus.
The memory 102 may include a non-volatile storage medium and an internal memory, among others. The non-volatile storage medium may store an operating system and a computer program. The computer program comprises program instructions which, when executed, cause the processor 101 to perform any of the session establishment methods.
Wherein the processor 101 is arranged to provide computing and control capabilities supporting the operation of the entire session establishment device 100.
The processor 101 may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
In an embodiment, the processor 101 is configured to run a computer program stored in the memory 102 and to implement the following steps when executing the computer program:
when a 5G network registration request sent by an AMF network element is received, acquiring a query result of first slicing subscription information of user equipment based on a user equipment identifier in the 5G network registration request;
if the query result is that the first slice subscription information does not exist, determining a 5G network registration account opening template corresponding to the user equipment identifier in an HSS network element;
sending second slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element establishes a PDU session corresponding to the user equipment in a 5G network based on context information corresponding to the user equipment and the second slice subscription information, wherein the context information comprises PDN connection information established by the user equipment in a 4G network;
after the AMF network element obtains the context information corresponding to the user equipment, a 5G registration account opening instruction corresponding to the user equipment is sent to the HSS network element so that the HSS network element can update the subscription information corresponding to the user equipment, wherein the update of the subscription information comprises deleting the PDN connection information established in the 4G network by the user equipment.
In one embodiment, when the processor 101 executes the computer program to implement that, after the AMF network element obtains the context information corresponding to the user equipment, the processor is specifically configured to implement:
and after a first time period of the second slice subscription information is sent to the AMF network element, sending the 5G registration account opening instruction to the HSS network element, wherein the first time period is larger than a second time period corresponding to the context information acquired by the AMF network element.
In one embodiment, after executing the computer program to implement the obtaining, by the AMF network element, the context information corresponding to the user equipment, sending, to the HSS network element, a 5G registration initiation instruction corresponding to the user equipment, so that the HSS network element updates subscription information corresponding to the user equipment, where the updating of the subscription information includes deleting the PDN connection information established in the 4G network by the user equipment, and is specifically configured to implement:
after detecting that the AMF network element acquires the context information, sending the 5G registration account opening instruction to the HSS, so that the HSS network element deletes the subscription information of the user equipment in the 4G network after the AMF network element acquires the context information, and increases the subscription information of the user equipment in the 5G network to complete updating of the subscription information corresponding to the user equipment, wherein deleting the subscription information of the user equipment in the 4G network comprises deleting the PDN connection information established by the user equipment in the 4G network.
In one embodiment, when executing the computer program to implement the obtaining, based on the ue identifier in the 5G network registration request, a query result of the first slice subscription information of the ue when receiving the 5G network registration request sent by the AMF network element, the processor 101 is specifically configured to implement:
and when the 5G network registration request is received, sending a subscription information query request carrying the user equipment identifier to the HSS network element so that the HSS can query the first slicing subscription information based on the user equipment identifier and feed back a query result of the first slicing subscription information.
In one embodiment, when executing the computer program to implement the determining, in the HSS network element, the 5G network registration account opening template corresponding to the ue identifier if the query result indicates that the first slice subscription information does not exist, the method is specifically configured to implement:
and if the query result is that the first piece of subscription information does not exist, querying a template corresponding to the user equipment identifier in the HSS network element according to a preset unowned query strategy, and taking the template as the 5G network registration account opening template.
In one embodiment, when executing the computer program to implement the sending, to the AMF network element, second slice subscription information corresponding to the 5G network registration account opening template, so that the AMF network element establishes a PDU session corresponding to the user equipment in the 5G network based on the context information corresponding to the user equipment and the second slice subscription information, the processor 101 is specifically configured to implement:
and transmitting slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element transmits an acquisition request of the context information to an MME network element, and establishing a PDU session corresponding to the user equipment in the 5G network according to the slice subscription information and the context information transmitted by the MME.
In one embodiment, after executing the computer program to implement the obtaining, by the AMF network element, the context information corresponding to the user equipment, sending, to the HSS network element, a 5G registration initiation instruction corresponding to the user equipment, so that the HSS network element updates subscription information corresponding to the user equipment, where the updating of the subscription information includes deleting the PDN connection information established in the 4G network by the user equipment, and is specifically configured to implement:
after the AMF network element obtains the context information, the AMF network element sends the 5G registration account opening instruction to the HSS network element, so that the HSS generates 5G network subscription information according to the second slice subscription information, and deletes 4G network subscription information of the user equipment, wherein the 4G network subscription information comprises PDN connection information established in a 4G network by the user equipment.
In one embodiment, when executing the computer program to implement the receiving the 5G network registration request sent by the AMF network element, the processor 101 is further configured to, after obtaining the query result of the first slice subscription information of the user equipment based on the user equipment identifier in the 5G network registration request, implement:
and if the query result is that the first slice subscription information exists, acquiring the first slice subscription information from the HSS network element, and returning the first slice subscription information to the AMF network element so that the AMF can establish PDU session corresponding to the user equipment in a 5G network based on PDN connection information established in the 4G network by the user equipment and the slice subscription information.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a session establishment apparatus according to an embodiment of the present invention. The session establishment device 200 may comprise a processor 201 and a memory 202, wherein the processor 201 and the memory 202 may be connected by a bus, such as any suitable bus, e.g. an I2C (Inter-integrated Circuit) bus.
The memory 202 may include a non-volatile storage medium and an internal memory, among others. The non-volatile storage medium may store an operating system and a computer program. The computer program comprises program instructions which, when executed, cause the processor 201 to perform any of the session establishment methods.
Wherein the processor 201 is arranged to provide computing and control capabilities supporting the operation of the entire session establishment device 200.
The processor 201 may be a central processing unit (Central Processing Unit, CPU) which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
As shown in fig. 3, fig. 3 is a schematic flowchart of a session establishment method according to an embodiment of the present invention.
Step S110, when a 5G network registration request sent by an AMF network element is received, acquiring a query result of first slice subscription information of user equipment based on a user equipment identifier in the 5G network registration request;
the step S110 specifically includes:
and when the 5G network registration request is received, sending a subscription information query request carrying the user equipment identifier to the HSS network element so that the HSS can query the first slicing subscription information based on the user equipment identifier and feed back a query result of the first slicing subscription information.
In this embodiment, when a User Equipment (UE) enters a 5G coverage area, for example, an NG-RAN access device or a device accessing a core network (base station, broadband network service network manager, etc.), a 4G is switched to a 5G, that is: the UE sends a 5G network registration request to an access and mobility management network element (Access and Mobility Management function, AMF), which invokes a Numd-SDM servitization interface, and sends a query request carrying a user equipment identity to the UDIWF network element.
The AMF network element is used as a control plane access network element of a user and is used for taking charge of the functions of registration management, connection management, security management, mobility management and the like of the user; the session establishment method provided by the embodiment is applied to a UDIWF network element, wherein the UDIWF network element is used for inquiring slice subscription information, inquiring a 5G network registration account opening template, sending a 5G registration account opening instruction to a user home server (Home Subscriber Server, HSS), triggering account opening operation and the like; the user equipment identity is an international mobile subscriber identity (International Mobile Subscriber Identity, IMSI), which is a number uniquely identifying a mobile subscriber in a 2G/3G/4G mobile communications network, the longest number being 15 digits. In order to meet the interoperability scenarios and requirements of operators 5G and 4G, the permanent identifier (subscription permanent identifier, SUPI) of the subscription of the 5G user adopts an IMSI format, and the IMSI format is the same as that of the 4G.
It can be understood that the 5G user is also a 4G user by default, so that in order to facilitate unified user data management when the 5G user performs 4G/5G interoperability, when setting a unified data management (unified data management, UDM) network element, an operator requires that the UDM network element also has the function of an HSS network element, that is, sets an HSS/UDM converged network element.
The UDIWF network element determines the UE-home HSS network element based on the IMSI of the UE.
The HSS network element is a subscriber database of the 4G core network, and is configured to store and manage subscriber data such as 4G subscriber subscription information, security information, location information, routing information, and the like.
The HSS network element can inquire the corresponding subscription information based on the IMSI of the UE, and returns an inquiry result to the UDIWF network element.
If no subscription information corresponding to the UE is queried, the UE does not perform 5G registration, that is, the UE does not open the 5G service.
Step S120, if the query result is that the first slice subscription information does not exist, determining a 5G network registration account opening template corresponding to the user equipment identifier in an HSS network element;
currently, when receiving a query result returned by an HSS network element and not querying first slice subscription information, the UDIWF network element sends a 5G registration account opening instruction of the UE to the HSS network element, acquires 4G network subscription information corresponding to the UE, generates 5G network subscription information corresponding to the UE according to the 4G network subscription information corresponding to the UE, and then sends a location cancel instruction to a mobility management entity (Mobility Management Entity, MME) at the same time. And after receiving the position cancellation instruction, the MME network element separates the UE and sends a PDN connection deletion instruction to a service network manager corresponding to the UE. Thereby, the subscription information corresponding to the UE is updated from the 4G network subscription information to the 5G network subscription information. The operation of updating the 4G network subscription information into the 5G network subscription information is triggered when the UDIWF network element sends the 5G registration account opening instruction of the UE to the HSS network element, so that the PDN connection is deleted before the AMF network element acquires the PDN connection corresponding to the UE, and the reestablishment of the 5G network session is caused.
In this embodiment, in order to avoid the problem of creating a 5G network session reestablishment, when receiving a query result returned by the HSS network element and not querying the first slice subscription information, the UDIWF network element delays sending a 5G registration account opening instruction of the UE to the HSS network element, and determines, according to the IMSI of the UE, corresponding second slice subscription information in the HSS network element, thereby directly determining, in the HSS network element, the second slice subscription information corresponding to the UE, and avoiding sending, to the HSS network element, a 5G registration account opening instruction that causes PDN connection deletion.
The step S120 specifically includes:
and if the query result is that the first piece of subscription information does not exist, querying a template corresponding to the user equipment identifier in the HSS network element according to a preset unowned query strategy, and taking the template as the 5G network registration account opening template.
In this embodiment, a query policy when no account is opened is configured in advance in a UDIWF network element, and the query policy is used to determine a 5G network registration account opening template corresponding to the UE according to a 5G account opening template corresponding to each user equipment pre-stored in the HSS network element by the IMSI of the UE when the slice subscription information corresponding to the UE is not queried in the HSS network element. The 5G account opening templates corresponding to the user equipment comprise information such as network slices corresponding to the user equipment. Therefore, by inquiring the strategy when the user is not in an account, which is configured in the UDIWF network element, the registration account opening template corresponding to the user equipment which is not registered in the HSS network element is directly inquired, and a 5G registration account opening instruction which leads to PDN connection deletion is prevented from being sent to the HSS network element.
In a specific embodiment, the 5G account opening templates corresponding to the user equipment may also be stored in a unified database (unified data repository, UDR). The UDR network element is used as a unified database in the 5G system, and is responsible for storing user structured data, including user subscription data, user policy data, application data, and capability opening data, and providing a data access interface for network elements such as UDM, PCF, NEF at the front end to access. Generally, in order to facilitate unified user data management when a 5G user performs 4G/5G interoperability, when an operator sets a UDR network element corresponding to a UDM network element, the UDR network element is required to have a function of storing data of HSS at the same time, that is, the UDR network element supports storing data of subscription, security, routing, location, and the like related to the user 4G at the same time. In the 5G system, the UDR network element needs to interface with a BSS (Business Support System, service support system) of the operator, and is configured to receive a tent instruction issued by the BSS network element to perform service opening or changing of the user 5G user. The UDR network element corresponding to the UDM network element may be combined with the UDM network element or may be separately provided with the UDM network element.
It can be understood that in order to reduce the huge cost pressure brought by 5G network construction, protect the investment of existing network stock equipment, reduce the risk of data cutover, when a part of operators deploy 5G networks, the operators can choose to adopt a scheme of mixed networking of HSS and UDR of the same manufacturer in part of provinces or areas. Because the 5G network home UDR network element after the user is migrated and the 4G network home HSS network element before the user is migrated are the same manufacturer equipment, the UDR network element can communicate with the HSS network element through a private interface between the user-defined UDR network element and the HSS network element of the manufacturer.
Further, the step S110 further includes:
and if the query result is that the first slice subscription information exists, acquiring the first slice subscription information from the HSS network element, and returning the first slice subscription information to the AMF network element so that the AMF can establish PDU session corresponding to the user equipment in a 5G network based on PDN connection information established in the 4G network by the user equipment and the slice subscription information.
In this embodiment, if the HSS network element queries the first slice subscription information corresponding to the UE, that is, the UE has completed registration and account opening on the HSS network element, the first slice subscription information is returned to the AMF network element. The AMF network element can establish PDU session corresponding to the UE in the 5G network according to the first slice subscription information and PDN connection established in the 4G network by the UE.
Step S130, sending second slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element establishes a PDU session corresponding to the user equipment in a 5G network based on the context information corresponding to the user equipment and the second slice subscription information, wherein the context information comprises PDN connection information established by the user equipment in a 4G network;
in this embodiment, the UDIWF network element directly determines a 5G network registration account opening template in the HSS network element according to the IMSI of the UE, and sends second slice subscription information in the 5G network registration account opening template to the AMF network element. And the AMF network element establishes PDU session corresponding to the UE in the 5G network according to the context information corresponding to the UE (including PDN connection information established in the 4G network by the UE) and the second slice subscription information. Therefore, when the AMF network element waits for the slice subscription information returned by the HSS network element based on the 5G network registration account opening instruction, the HSS network element simultaneously triggers PDN connection deletion caused by the PDN connection deletion instruction based on the 5G network registration account opening instruction, so that after the AMF network element acquires the PDN connection of the UE in the 4G network, the AMF network element sends the 5G network registration account opening instruction to the HSS network element, and simultaneously triggers the PDN connection deletion instruction to delete the PDN connection.
The step S130 specifically includes:
and transmitting slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element transmits an acquisition request of the context information to an MME network element, and establishing a PDU session corresponding to the user equipment in the 5G network according to the slice subscription information and the context information transmitted by the MME.
In this embodiment, after the UDIWF network element sends the slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, the AMF network element sends an acquisition request of the context information (including information such as IMSI, EPS security context, network capability of the UE, and EPS bearer context of the UE) to the MME network element, and after receiving the context information of the UE in the 4G network returned by the MME network element, the AMF network element establishes a PDU session corresponding to the UE in the 5G network according to the slice subscription information and the context information sent by the MME. Specifically, the context information of the UE in the 4G network may be converted into context information of the UE in the 5G network, for example, pushing to the 5G security context according to the EPS security context, or authenticating to the UE, etc., and establishing a PDU session corresponding to the UE in the 5G network according to the context information of the UE in the 5G network.
Step S140, after the AMF network element obtains the context information corresponding to the user equipment, a 5G registration account opening instruction corresponding to the user equipment is sent to the HSS network element, so that the HSS network element updates subscription information corresponding to the user equipment, where updating the subscription information includes deleting the PDN connection information established in the 4G network by the user equipment.
In this embodiment, after the AMF network element obtains the context information corresponding to the user equipment, the AMF network element sends a 5G registration account opening instruction corresponding to the user equipment to the HSS network element. Namely, the AMF acquires the 4G network subscription information corresponding to the UE and generates the 5G network subscription information corresponding to the UE according to the 4G network subscription information corresponding to the UE. The HSS network element sends a location cancel instruction to the mobility management entity (Mobility Management Entity, MME) while receiving the 5G registration opening instruction. And after receiving the position cancellation instruction, the MME network element separates the UE and sends a PDN connection deletion instruction to a service network manager corresponding to the UE. Thus, the subscription information corresponding to the UE is updated from the 4G network subscription information to the 5G network subscription information, and migration of the subscription information of the UE is completed.
The step S140 specifically includes:
after detecting that the AMF network element acquires the context information, sending the 5G registration account opening instruction to the HSS, so that the HSS network element deletes the subscription information of the user equipment in the 4G network after the AMF network element acquires the context information, and increases the subscription information of the user equipment in the 5G network to complete updating of the subscription information corresponding to the user equipment, wherein deleting the subscription information of the user equipment in the 4G network comprises deleting the PDN connection information established by the user equipment in the 4G network.
In this embodiment, in order to delete the PDN connection information after the AMF network element acquires the PDN connection information, a circulation timer may be set to circulate an instruction for sending to the AMF network element whether to acquire a context, and if so, send an acquisition event completion instruction to the UDIWF network element. Therefore, after the AMF network element is detected to acquire the context information, the 5G registration account opening instruction is sent to the HSS, so that after the AMF network element acquires the context information, the HSS deletes the subscription information of the user equipment in the 4G network, and increases the subscription information of the user equipment in the 5G network, so that updating of the subscription information corresponding to the user equipment is completed, namely the subscription information of the user equipment in the 4G network (including deleting the PDN connection information established in the 4G network by the user equipment) is deleted.
The step of sending the 5G registration account opening instruction corresponding to the user equipment to the HSS network element after the AMF network element obtains the context information corresponding to the user equipment includes:
and after a first time period of the second slice subscription information is sent to the AMF network element, sending the 5G registration account opening instruction to the HSS network element, wherein the first time period is larger than a second time period corresponding to the context information acquired by the AMF network element.
In this embodiment, a timer may be set according to a time required for the AMF network element to obtain the context information after receiving the slice subscription information, where the time is set as a second time period, and when the UDIWF network element sends the second slice subscription information to the AMF network element, and when the first time period is reached, the UDIWF network element sends the 5G registration account opening instruction to the HSS network element, where the first time period is greater than the second time period, so that it is ensured that PDN connection information is deleted after the AMF network element obtains the PDN connection information.
In this embodiment, when the user equipment switches networks for the first time, that is, the slice subscription information corresponding to the user equipment is not queried, the 5G network registration account opening template corresponding to the user equipment is preferentially returned to the AMF network element, so that the AMF network element obtains PDN connection information of the user equipment. And then after the AMF network element acquires the PDN connection information, sending a 5G registration account opening instruction corresponding to the user equipment to the HSS network element, and triggering a deletion instruction of the PDN connection information at the same time, thereby avoiding deleting the PDN connection information before the AMF network element acquires the PDN connection information, avoiding reestablishing a 5G network session, improving the session establishment efficiency of the user equipment when the network is switched for the first time, and improving the user experience.
The embodiment of the invention also provides a storage medium which is used for readable storage, the storage medium stores a program, the program comprises program instructions, and the processor executes the program instructions to realize any one of the session establishment methods provided by the embodiment of the invention.
The storage medium may be an internal storage unit of the session establishment device according to the foregoing embodiment, for example, a hard disk or a memory of the session establishment device. The storage medium may also be an external storage device of the session establishment device, such as a plug-in hard disk, a Smart Media Card (SMC), a secure digital Card (Secure Digital Card, SD Card), a Flash memory Card (Flash Card) or the like, which are provided on the session establishment device.
The invention discloses a session establishment method, equipment and a storage medium, wherein when a 5G network registration request sent by an AMF network element is received, a query result of first slicing subscription information of user equipment is obtained based on a user equipment identifier in the 5G network registration request; if the query result is that the first slice subscription information does not exist, determining a 5G network registration account opening template corresponding to the user equipment identifier in an HSS network element; sending second slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element establishes a PDU session corresponding to the user equipment in a 5G network based on context information corresponding to the user equipment and the second slice subscription information, wherein the context information comprises PDN connection information established by the user equipment in a 4G network; after the AMF network element obtains the context information corresponding to the user equipment, a 5G registration account opening instruction corresponding to the user equipment is sent to the HSS network element so that the HSS network element can update the subscription information corresponding to the user equipment, wherein the update of the subscription information comprises deleting the PDN connection information established in the 4G network by the user equipment. By the method, when the user equipment switches the network for the first time, namely the slice subscription information corresponding to the user equipment is not queried, the 5G network registration account opening template corresponding to the user equipment is preferentially returned to the AMF network element, so that the AMF network element acquires the PDN connection information of the user equipment. And then after the AMF network element acquires the PDN connection information, sending a 5G registration account opening instruction corresponding to the user equipment to the HSS network element, and triggering a deletion instruction of the PDN connection information at the same time, thereby avoiding deleting the PDN connection information before the AMF network element acquires the PDN connection information, avoiding reestablishing a 5G network session, improving the session establishment efficiency of the user equipment when the network is switched for the first time, and improving the user experience.
Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.
In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a storable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). The term storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and thus do not limit the scope of the claims of the present invention. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the present invention shall fall within the scope of the appended claims.

Claims (10)

1. A method of session establishment, the method comprising:
when a 5G network registration request sent by an AMF network element is received, acquiring a query result of first slicing subscription information of user equipment based on a user equipment identifier in the 5G network registration request;
if the query result is that the first slice subscription information does not exist, determining a 5G network registration account opening template corresponding to the user equipment identifier in an HSS network element;
sending second slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element establishes a PDU session corresponding to the user equipment in a 5G network based on context information corresponding to the user equipment and the second slice subscription information, wherein the context information comprises PDN connection information established by the user equipment in a 4G network;
after the AMF network element obtains the context information corresponding to the user equipment, a 5G registration account opening instruction corresponding to the user equipment is sent to the HSS network element so that the HSS network element can update the subscription information corresponding to the user equipment, wherein the update of the subscription information comprises deleting the PDN connection information established in the 4G network by the user equipment.
2. The session establishment method according to claim 1, wherein the step of sending the 5G registration initiation instruction corresponding to the user equipment to the HSS network element after the AMF network element obtains the context information corresponding to the user equipment includes:
and after a first time period of the second slice subscription information is sent to the AMF network element, sending the 5G registration account opening instruction to the HSS network element, wherein the first time period is larger than a second time period corresponding to the context information acquired by the AMF network element.
3. The session establishment method according to claim 1, wherein the step of sending a 5G registration initiation instruction corresponding to the user equipment to the HSS network element after the AMF network element obtains the context information corresponding to the user equipment, so that the HSS network element updates subscription information corresponding to the user equipment includes:
after detecting that the AMF network element acquires the context information, sending the 5G registration account opening instruction to the HSS, so that the HSS network element deletes the subscription information of the user equipment in the 4G network after the AMF network element acquires the context information, and increases the subscription information of the user equipment in the 5G network to complete updating of the subscription information corresponding to the user equipment, wherein deleting the subscription information of the user equipment in the 4G network comprises deleting the PDN connection information established by the user equipment in the 4G network.
4. The session establishment method according to claim 1, wherein the step of acquiring the query result of the first slice subscription information of the user equipment based on the user equipment identifier in the 5G network registration request when the 5G network registration request sent by the AMF network element is received comprises:
and when the 5G network registration request is received, sending a subscription information query request carrying the user equipment identifier to the HSS network element so that the HSS can query the first slicing subscription information based on the user equipment identifier and feed back a query result of the first slicing subscription information.
5. The method for establishing a session according to claim 4, wherein the step of determining, in the HSS network element, the 5G network registration account opening template corresponding to the ue identifier if the query result indicates that the first slice subscription information does not exist includes:
and if the query result is that the first piece of subscription information does not exist, querying a template corresponding to the user equipment identifier in the HSS network element according to a preset unowned query strategy, and taking the template as the 5G network registration account opening template.
6. The session establishment method according to claim 1, wherein the step of sending second slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element establishes a PDU session corresponding to the user equipment in the 5G network based on the context information corresponding to the user equipment and the second slice subscription information comprises:
and transmitting slice subscription information corresponding to the 5G network registration account opening template to the AMF network element, so that the AMF network element transmits an acquisition request of the context information to an MME network element, and establishing a PDU session corresponding to the user equipment in the 5G network according to the slice subscription information and the context information transmitted by the MME.
7. The session establishment method according to claim 1, wherein the step of sending a 5G registration initiation instruction corresponding to the user equipment to the HSS network element after the AMF network element obtains the context information corresponding to the user equipment, so that the HSS network element updates subscription information corresponding to the user equipment includes:
after the AMF network element obtains the context information, the AMF network element sends the 5G registration account opening instruction to the HSS network element, so that the HSS generates 5G network subscription information according to the second slice subscription information, and deletes 4G network subscription information of the user equipment, wherein the 4G network subscription information comprises PDN connection information established in a 4G network by the user equipment.
8. The session establishment method according to any one of claims 1 to 7, wherein, when receiving a 5G network registration request sent by an AMF network element, after the step of obtaining a query result of first slice subscription information of a user equipment based on a user equipment identifier in the 5G network registration request, the method further comprises:
and if the query result is that the first slice subscription information exists, acquiring the first slice subscription information from the HSS network element, and returning the first slice subscription information to the AMF network element so that the AMF can establish PDU session corresponding to the user equipment in a 5G network based on PDN connection information established in the 4G network by the user equipment and the slice subscription information.
9. A session establishment device, characterized in that the device comprises a memory, a processor, a program stored on the memory and executable on the processor, and a data bus for enabling a connection communication between the processor and the memory, which program, when being executed by the processor, implements the steps of the session establishment method according to any of claims 1-8.
10. A storage medium for readable storage, wherein the storage medium stores one or more programs executable by one or more processors to implement the session establishment method of any one of claims 1 to 8.
CN202111290857.8A 2021-11-02 2021-11-02 Session establishment method, apparatus and storage medium Pending CN116074903A (en)

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US10313997B2 (en) * 2017-02-06 2019-06-04 Industrial Technology Research Institute User equipment registration method for network slice selection and network controller and network communication system using the same
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