CN111083718A - Session management method, network function and network system - Google Patents

Session management method, network function and network system Download PDF

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Publication number
CN111083718A
CN111083718A CN201811228251.XA CN201811228251A CN111083718A CN 111083718 A CN111083718 A CN 111083718A CN 201811228251 A CN201811228251 A CN 201811228251A CN 111083718 A CN111083718 A CN 111083718A
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smf
session
registration request
function
communication connection
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CN111083718B (en
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吴玲
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

The invention provides a session management method, a network function and a network system, wherein the method comprises the following steps: when a first SMF establishing communication connection with the UPF fails, taking a second SMF as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set; establishing a communication connection with the second SMF. Thus, when the first SMF fails, the UPF can select a second SMF from the SMF set as the backup of the first SMF and establish communication connection with the second SMF, thereby effectively ensuring that the downlink service is not interrupted due to the failure of the first SMF.

Description

Session management method, network function and network system
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a session management method, a network function, and a network system.
Background
Fifth generation (5)thGeneration, 5G) mobile communication system, after a Network Function (NF) of a control plane fails, a series of problems may occur if a service (such as an uplink service or a downlink service) arrives. For example, a user establishes a Session on a Session Management Function (SMF), and when the SMF fails, a downlink service first arrivesA User Plane Function (User Plane Function, UPF for short) that establishes a session with the failed SMF cannot transmit a downlink service to the SMF; or, when the SMF fails, the uplink service first arrives, and an Access and Mobility Management Function (AMF) that establishes a session with the failed SMF cannot transmit uplink data to the SMF. As can be seen from the above, when the SMF fails, the transmission of the uplink traffic and the downlink traffic is affected.
Disclosure of Invention
Embodiments of the present invention provide a session management method, a network function, and a network system, so as to solve a problem that transmission of an uplink service and a downlink service is affected when an SMF fails.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a session management method, applied to a user plane function UPF, including:
when a first Session Management Function (SMF) establishing communication connection with the UPF fails, taking a second SMF as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set;
establishing a communication connection with the second SMF.
In a second aspect, an embodiment of the present invention provides a session management method, which is applied to access an AMF, and includes:
when a first Session Management Function (SMF) establishing communication connection with the AMF fails, taking a second SMF as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set;
establishing a communication connection with the second SMF.
In a third aspect, an embodiment of the present invention provides a session management method, applied to a session management function SMF, including:
sending an SMF registration request message or an SMF service registration request to a network storage function (NRF), wherein the SMF registration request message or the SMF service registration request comprises a packet where the SMF is located;
receiving a registration response message or a service registration response message sent by the NRF, wherein the registration response message or the service registration response message comprises a SMF set which comprises other SMFs having the same group with the SMF.
In a fourth aspect, an embodiment of the present invention provides a session management method, applied to a network storage function NRF, including:
receiving an SMF registration request message or an SMF service registration request sent by a Session Management Function (SMF), wherein the SMF registration request message or the SMF service registration request comprises a packet where the SMF is located;
sending a registration response message or a service registration response message to the SMF, the registration response message or the service registration response message including a set of SMFs including other SMFs having the same group as the SMF.
In a fifth aspect, an embodiment of the present invention provides a user plane function, including:
the system comprises a first SMF backup acquisition module, a second SMF backup acquisition module and a first session management function (UPF) backup acquisition module, wherein the first SMF backup acquisition module is used for taking the second SMF as the backup of the first SMF when the SMF of the first session management function establishing communication connection with a User Plane Function (UPF) fails; wherein the first SMF and the second SMF belong to the same SMF set;
and the first communication connection module is used for establishing communication connection with the second SMF.
In a sixth aspect, an embodiment of the present invention provides an access mobility management function, including:
the second SMF backup obtaining module is used for taking the second SMF as the backup of the first SMF when the first session management function SMF establishing communication connection with the access mobile management function AMF fails; wherein the first SMF and the second SMF belong to the same SMF set;
and the second communication connection module is used for establishing communication connection with the second SMF.
In a seventh aspect, an embodiment of the present invention provides a session management function, including:
a second sending module, configured to send an SMF registration request message or an SMF service registration request to a network storage function NRF, where the SMF registration request message or the SMF service registration request includes a packet where the SMF is located;
a third SMF set receiving module, configured to receive a registration response message or a service registration response message sent by the NRF, where the registration response message or the service registration response message includes a SMF set, and the SMF set includes other SMFs having the same group as the SMF.
In an eighth aspect, an embodiment of the present invention provides a network storage function, including:
a first receiving module, configured to receive an SMF registration request message or an SMF service registration request sent by a session management function SMF, where the SMF registration request message or the SMF service registration request includes a packet where the SMF is located;
a third sending module, configured to send a registration response message or a service registration response message to the SMF, where the registration response message or the service registration response message includes a SMF set that includes other SMFs having the same group as the SMF.
In a ninth aspect, an embodiment of the present invention further provides a network system, which includes the above-mentioned user plane function, the above-mentioned access mobility management function, the above-mentioned session management function, and the above-mentioned network storage function.
In the embodiment of the invention, when a first SMF establishing communication connection with the UPF fails, a second SMF is used as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set; establishing a communication connection with the second SMF. Thus, when the first SMF fails, the UPF can select a second SMF from the SMF set as the backup of the first SMF and establish communication connection with the second SMF, thereby effectively ensuring that the downlink service is not interrupted due to the failure of the first SMF.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a flowchart of a session management method according to an embodiment of the present invention;
fig. 2 is a flowchart of a session management method according to a second embodiment of the present invention;
fig. 3 is a flowchart of a session management method according to a third embodiment of the present invention;
fig. 4 is a flowchart of a session management method according to a fourth embodiment of the present invention;
fig. 5a is one of the structural diagrams of the user plane function provided in the fifth embodiment of the present invention;
fig. 5b is a second block diagram of the user plane function provided in the fifth embodiment of the present invention;
fig. 6a is one of the structural diagrams of the user plane function provided in the sixth embodiment of the present invention;
fig. 6b is a second block diagram of the user plane function provided in the sixth embodiment of the present invention;
fig. 7a is one of the structural diagrams of the user plane function provided by the seventh embodiment of the present invention;
fig. 7b is a second block diagram of the user plane function provided in the seventh embodiment of the present invention;
fig. 8a is one of the structural diagrams of the user plane function provided in the eighth embodiment of the present invention;
fig. 8b is a second structural diagram of the user plane function according to the eighth 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.
Example one
Fig. 1 is a flowchart of a session management method according to an embodiment of the present invention, and as shown in fig. 1, a session management method according to an embodiment of the present invention is applied to a UPF, and includes the following steps:
step 101, when a first Session Management Function (SMF) establishing communication connection with the UPF fails, taking a second SMF as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set.
Specifically, the SMF set includes a second SMF having the same grouping as the first SMF, and of course, the SMF set may also include the first SMF, and may be flexibly selected according to the actual situation, which is not limited herein. And grouping the SMFs, wherein the SMFs belonging to the same group are included in the same SMF set. When the first SMF fails to transmit, other SMFs belonging to the same group as the first SMF may be backed up by the first SMF. In this embodiment, the backup of the first SMF is referred to as the second SMF.
In the downlink service first, when a first SMF establishing a communication connection with a UPF fails, the UPF selects a second SMF from the SMF set as a backup of the first SMF, so that the second SMF works in place of the failed first SMF.
Further, before this step, the session management method further includes acquiring the SMF set.
There are various ways to obtain the SMF set, for example, the SMF set may be preconfigured in the UPF, and the SMF set includes SMFs located in the same group as the first SMF.
In addition to the above pre-configuring the SMF set in the UPF, the UPF may also obtain the SMF set in a dynamic acquisition manner. For example, the set of SMFs sent by a first SMF is received when a UPF establishes a communication connection with the first SMF. Because the SMF set is obtained when the communication connection is established with the first SMF, compared with the SMF set which is configured in advance in the UPF, the SMF set obtained by the UPF in such a way is more convenient to update and has stronger real-time performance, so that the grouping management of the SMFs is more flexible.
For example, in a first time period, the set of SMFs includes SMF1 and SMF2, and in a second time period, the set of SMFs includes SMF1, SMF2, and SMF 3. When the UPF establishes a communication connection with a first SMF in a first time period, the set of SMFs received by the UPF includes SMF1 and SMF 2;
when the UPF establishes a communication connection with the first SMF during the second time period, the set of SMFs received by the UPF includes SMF1, SMF2, and SMF 3.
It should be noted that the second SMF included in the SMF set needs to be a normally usable SMF, for example, an SMF that cannot be failed or deactivated.
When there are a plurality of second SMFs included in the SMF set, the second SMF may be determined in a round-robin manner or in a load balancing manner. In addition to being selected by the UPF to determine the second SMF, a second SMF may be assigned to the first SMF as a backup directly in the SMF set, and when the first SMF fails, the UPF obtains the second SMF directly from the assignment.
The SMF set may specifically include an ID of the SMF, a packet ID of a packet in which the SMF is located, and the like.
And 102, establishing communication connection with the second SMF.
The UPF establishes a communication connection with the second SMF for data transfer after determining the second SMF.
According to the session management method provided by the embodiment of the invention, when a first SMF establishing communication connection with the UPF fails, a second SMF is used as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set; establishing a communication connection with the second SMF. Thus, when the first SMF fails, the UPF can select a second SMF from the SMF set as the backup of the first SMF and establish communication connection with the second SMF, thereby effectively ensuring that the downlink service is not interrupted due to the failure of the first SMF.
Further, step 102 includes:
and sending a downlink data notification to the second SMF so that the second SMF requests a user context from the UDSF according to the session ID, wherein the downlink data notification comprises the session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the first SMF is located.
And after determining the second SMF, the UPF sends a downlink data notification to the second SMF, wherein the downlink data notification carries the session ID. For each group, an Unstructured Data Storage Function (UDSF) is provided, the UDSF is a centralized Data storage server, and user key information is stored in the UDSF. The second SMF requests the UDSF for a user context according to the session ID, and can obtain information of the UE to be served by the second SMF, i.e. the UE that establishes a session with the first SMF.
The UPF can realize the establishment of communication connection with the second SMF by sending the downlink data notification to the second SMF, thereby realizing the purpose that the second SMF replaces the first SMF when the first SMF fails, and ensuring the effective proceeding of the downlink service.
Example two
Fig. 2 is a flowchart of a session management method provided in the second embodiment of the present invention, and as shown in fig. 2, the embodiment of the present invention provides a session management method applied to an AMF, which includes the following steps:
step 201, when a first Session Management Function (SMF) establishing communication connection with the AMF fails, taking a second SMF as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set.
Specifically, the SMF set includes a second SMF having the same grouping as the first SMF, and of course, the SMF set may also include the first SMF, and may be flexibly selected according to the actual situation, which is not limited herein. And grouping the SMFs, wherein the SMFs belonging to the same group are included in the same SMF set. When the first SMF fails to transmit, other SMFs belonging to the same group as the first SMF may be backed up by the first SMF. In this embodiment, the backup of the first SMF is referred to as the second SMF.
In the uplink service, when a first SMF establishing a communication connection with an AMF fails, the AMF selects a second SMF from the SMF set as a backup of the first SMF, so that the second SMF works in place of the failed first SMF.
Further, before this step, the session management method further includes acquiring the SMF set.
There are various ways to obtain the SMF set, for example, the SMF set may be preconfigured in the AMF, and the SMF set includes SMFs located in the same group as the first SMF.
In addition to the above pre-configuring the SMF set in the AMF, the AMF may also obtain the SMF set by means of dynamic acquisition.
The step of obtaining the SMF set comprises the following steps: sending an SMF registration request or a service discovery request to a Network storage Function (NRF); receiving a response SMF registration request or a response service discovery request of the NRF, wherein the response SMF registration request or the response service discovery request comprises the SMF set.
Specifically, the SMF needs to be registered with the NRF before being put into use. The registration process is as follows: the SMF transmits to the NRF an SMF registration request message or an SMF service registration request including a packet in which the SMF is located.
Through the above SMF registration process, the NRF may obtain SMFs having the same packet, that is, obtain the SMF set, and after the AMF sends an SMF registration request or a service discovery request to the NRF, the NRF may send the SMF set to the AMF in response to the SMF registration request or in response to the service discovery request. Therefore, compared with the SMF set which is configured in advance in the AMF, the SMF set obtained by the AMF in such a way is more convenient to update and has stronger real-time performance, so that the grouping management of the SMFs is more flexible.
It should be noted that the second SMF included in the SMF set needs to be a normally usable SMF, for example, an SMF that cannot be failed or deactivated.
When there are a plurality of second SMFs included in the SMF set, the second SMF may be determined in a round-robin manner or in a load balancing manner. In addition to being selected by the AMF to determine the second SMF, a second SMF may be assigned to the first SMF as a backup directly in the set of SMFs, and when the first SMF fails, the AMF obtains the second SMF directly according to the assignment.
Step 202, establishing a communication connection with the second SMF.
And the AMF establishes a communication connection with the second SMF for data transmission after determining the second SMF.
According to the session management method provided by the embodiment of the invention, when a first Session Management Function (SMF) establishing communication connection with the AMF fails, a second SMF is used as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set; establishing a communication connection with the second SMF. Thus, when the first SMF fails, the AMF can select a second SMF from the SMF set as a backup of the first SMF and establish communication connection with the second SMF, thereby effectively ensuring that the uplink service is not interrupted due to the failure of the first SMF.
Further, step 202 includes:
and sending a session establishment request to the second SMF so that the second SMF requests a user context from the UDSF according to a session ID, wherein the session establishment request comprises the session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the first SMF is located.
After determining the second SMF, the AMF sends a session establishment request to the second SMF, where the session establishment request carries the session ID. And for each group, one UDSF is set, the UDSF is a centralized data storage server, and the key information of the user is stored in the UDSF. The second SMF requests the UDSF for a user context according to the session ID, and can obtain information of the UE to be served by the second SMF, i.e. the UE that establishes a session with the first SMF.
The AMF can realize the establishment of communication connection with the second SMF by sending a session establishment request to the second SMF, so that the second SMF replaces the first SMF when the first SMF fails, and the purpose of ensuring the effective proceeding of the uplink service is realized.
EXAMPLE III
Fig. 3 is a flowchart of a session management method provided in a third embodiment of the present invention, and as shown in fig. 3, a session management method provided in an embodiment of the present invention is applied to an SMF, and includes the following steps:
step 301, sending an SMF registration request message or an SMF service registration request to an NRF, where the SMF registration request message or the SMF service registration request includes a packet in which the SMF is located.
Before the SMF is used, it needs to register in the NRF, that is, an SMF registration request message or an SMF service registration request is sent to the NRF. The SMF registration request message or SMF service registration request includes a packet in which the SMF is located, which may facilitate the NRF to include SMFs having the same packet in the SMF set.
It should be noted that the second SMF included in the SMF set needs to be a normally usable SMF, for example, an SMF that cannot be failed or deactivated.
The SMF set may specifically include an ID of the SMF, a packet ID of a packet in which the SMF is located, and the like.
Step 302, receiving a registration response message or a service registration response message sent by the NRF, where the registration response message or the service registration response message includes a set of SMFs, and the set of SMFs includes other SMFs having the same group as the SMF. If the SMF is a first SMF, then the other SMFs may be considered second SMFs.
The session management method provided by the embodiment of the invention sends SMF registration request message or SMF service registration request to NRF; and receiving a registration response message or a service registration response message sent by the NRF, wherein the registration response message or the service registration response message comprises the SMF set. Thus, when the SMF completes registration, the SMF set sent by the NRF is received, so that when the SMF establishes communication connection with the UPF, the SMF set can be sent to the UPF, and when the SMF fails, the UPF can select another SMF from the SMF set to serve as a backup of the failed SMF, thereby effectively ensuring that the downlink service can normally operate.
Further, when a communication connection is established with the user plane function UPF, the set of SMFs is sent to the UPF. When the SMF sends a fault, the UPF can select another SMF from the SMF set as a backup of the fault SMF, and the normal operation of the downlink service is effectively ensured.
Further, a session management method provided in an embodiment of the present invention further includes:
receiving a downlink data notification sent by the user plane function UPF; and requesting a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the downlink data notification comprises the session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the SMF is located.
Specifically, the SMF receives a downlink data notification sent by the UPF, where the downlink data notification carries the session ID. The SMF requests the UDSF for a user context based on the session ID, and can obtain information about the UE that the SMF is going to serve. When the SMF is a backup SMF, the UE is the UE establishing the session with the failed SMF; otherwise, the UE is the UE establishing the session with the SMF.
In this embodiment, the SMF may establish a communication connection with the UPF by receiving the downlink data notification sent by the UPF. When the SMF is a backup SMF, the SMF can replace the failed SMF to be connected with the UPF, and the downlink service is guaranteed to be effectively carried out.
Further, a session management method provided in another embodiment of the present invention further includes:
receiving a session establishment request sent by an AMF; and requesting a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the session establishment request comprises the session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the SMF is located.
Specifically, the SMF receives a session establishment request sent by the AMF, where the session establishment request carries a session ID. The SMF requests the UDSF for a user context based on the session ID, and can obtain information about the UE that the SMF is going to serve. When the SMF is a backup SMF, the UE is the UE establishing the session with the failed SMF; otherwise, the UE is the UE establishing the session with the SMF.
In this embodiment, the SMF may establish a communication connection with the AMF by receiving the session establishment request sent by the AMF. When the SMF is a backup SMF, the backup SMF can replace the fault SMF to be connected with the AMF, and the uplink service is ensured to be effectively carried out.
Example four
Fig. 4 is a flowchart of a session management method provided in the fourth embodiment of the present invention, and as shown in fig. 4, a session management method provided in the fourth embodiment of the present invention is applied to NRF, and includes the following steps:
step 401, receiving an SMF registration request message or an SMF service registration request sent by a session management function SMF, where the SMF registration request message or the SMF service registration request includes a packet where the SMF is located.
Before the SMF is used, it needs to register in the NRF, that is, an SMF registration request message or an SMF service registration request is sent to the NRF. The SMF registration request message or SMF service registration request includes a packet in which the SMF is located, which may facilitate the NRF to include SMFs having the same packet in the SMF set.
It should be noted that the second SMF included in the SMF set needs to be a normally usable SMF, for example, an SMF that cannot be failed or deactivated.
The SMF set may specifically include an ID of the SMF, a packet ID of a packet in which the SMF is located, and the like.
Step 402, sending a registration response message or a service registration response message to the SMF, where the registration response message or the service registration response message includes a set of SMFs including other SMFs having the same group as the SMF. If the SMF is a first SMF, then the other SMFs may be considered second SMFs.
The session management method provided by the embodiment of the invention receives an SMF registration request message or an SMF service registration request sent by a Session Management Function (SMF); sending a registration response message or a service registration response message to the SMF, the registration response message or the service registration response message including the set of SMFs. Thus, when the SMF completes registration, the SMF set sent by the NRF is received, so that when the SMF establishes communication connection with the UPF, the SMF set can be sent to the UPF, and when the SMF fails, the UPF can select another SMF from the SMF set to serve as a backup of the failed SMF, thereby effectively ensuring that the downlink service can normally operate.
Further, in another embodiment provided by the present invention, the session management method further includes: receiving an SMF registration request or a service discovery request sent by an AMF; sending a response SMF registration request or a response service discovery request to the AMF, the response SMF registration request or the response service discovery request including the set of SMFs.
Specifically, after the NRF receives an SMF registration request or a service discovery request sent by the AMF, the NRF sends the SMF set to the AMF by responding to the SMF registration request or responding to the service discovery request, so that when the SMF establishing a communication connection with the AMF fails, the AMF can select an SMF from the SMF set as a backup of the failed SMF and establish a communication connection with the backup SMF, thereby ensuring that the uplink service is effectively performed.
EXAMPLE five
Fig. 5a is one of the structural diagrams of the user plane function provided in the fifth embodiment of the present invention, and as shown in fig. 5a, an embodiment of the present invention provides a user plane function 500, which includes:
a first SMF backup obtaining module 501, configured to, when a first session management function SMF that establishes a communication connection with a user plane function UPF fails, take a second SMF as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set;
a first communication connection module 502, configured to establish a communication connection with the second SMF.
Further, as shown in fig. 5b, the user plane function 500 further includes:
a first SMF set receiving module 503, configured to receive the set of SMFs sent by the first SMF when a communication connection is established with the first SMF.
Further, the first communication connection module is configured to:
and sending a downlink data notification to the second SMF so that the second SMF requests a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the downlink data notification comprises a session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the first SMF is located.
Since the user plane function 500 in this embodiment is an apparatus embodiment corresponding to the first embodiment, each step in the first embodiment can be implemented, and is not described herein again to avoid repetition.
EXAMPLE six
Fig. 6a is a structural diagram of an access mobility management function according to a sixth embodiment of the present invention, and as shown in fig. 6a, an access mobility management function 600 according to an embodiment of the present invention includes:
a second SMF backup obtaining module 601, configured to, when a failure occurs in a first session management function SMF that establishes a communication connection with an access mobility management function AMF, use the second SMF as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set;
a second communication connection module 602, configured to establish a communication connection with the second SMF.
Further, as shown in fig. 6b, the access mobility management function 600 further includes:
a first sending module 603, configured to send an SMF registration request or a service discovery request to a network storage function NRF;
a second SMF set receiving module 604, configured to receive a response SMF registration request or a response service discovery request of the NRF, where the response SMF registration request or the response service discovery request includes the SMF set.
Further, the second communication connection module 602 is configured to:
and sending a session establishment request to the second SMF so that the second SMF requests a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the session establishment request comprises a session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the first SMF is located.
Since the access mobility management function 600 in this embodiment is a device embodiment corresponding to the embodiment, each step in the second embodiment can be implemented, and is not described herein again to avoid repetition.
EXAMPLE seven
Fig. 7a is a structural diagram of an access mobility management function according to a sixth embodiment of the present invention, and as shown in fig. 7a, a session management function 700 according to an embodiment of the present invention includes:
a second sending module 701, configured to send an SMF registration request message or an SMF service registration request to a network storage function NRF, where the SMF registration request message or the SMF service registration request includes a packet where the SMF is located;
a third SMF set receiving module 702, configured to receive a registration response message or a service registration response message sent by the NRF, where the registration response message or the service registration response message includes a SMF set that includes other SMFs having the same group as the SMF.
Further, as shown in fig. 7b, the session management function 700 provided in this embodiment further includes:
a first SMF set sending module 703, configured to send the SMF set to the user plane function UPF when a communication connection is established with the UPF.
Further, as shown in fig. 7b, the session management function 700 provided in this embodiment further includes:
a downlink data notification receiving module 704, configured to receive a downlink data notification sent by the user plane function UPF;
a request message sending module 705, configured to request a user context from an unstructured data storage function UDSF according to a session ID, where the downlink data notification includes the session ID, and the session ID is an identifier of a session established between a user equipment UE and a mobile data network where the SMF is located.
Further, as shown in fig. 7b, the session management function 700 provided in this embodiment further includes:
a session establishment request receiving module 706, configured to receive a session establishment request sent by an access mobility management function AMF;
a request message sending module 705, configured to request a user context from an unstructured data storage function UDSF according to a session ID, where the session establishment request includes the session ID, and the session ID is an identifier of a session established between a user equipment UE and a mobile data network where the SMF is located.
Since the session management function 700 in this embodiment is an embodiment of a device corresponding to the third embodiment, each step in the third embodiment can be implemented, and is not described herein again to avoid repetition.
Example eight
Fig. 8a is one of the structural diagrams of the network storage function according to the eighth embodiment of the present invention, and as shown in fig. 8a, an embodiment of the present invention provides a network storage function 800, which includes:
a first receiving module 801, configured to receive an SMF registration request message or an SMF service registration request sent by a session management function SMF, where the SMF registration request message or the SMF service registration request includes a packet where the SMF is located;
a third sending module 802, configured to send a registration response message or a service registration response message to the SMF, where the registration response message or the service registration response message includes a set of SMFs, and the set of SMFs includes other SMFs having the same group as the SMF.
Further, as shown in fig. 8b, the network storage function 800 further includes:
a second receiving module 803, configured to receive an SMF registration request or a service discovery request sent by an access mobility management function AMF;
a fourth sending module 804, configured to send a response SMF registration request or a response service discovery request to the AMF, where the response SMF registration request or the response service discovery request includes the SMF set.
Since the network storage function 800 in this embodiment is a device embodiment corresponding to the fourth embodiment, each step in the fourth embodiment can be implemented, and is not described herein again to avoid repetition.
Further, the present invention also provides a network system, which includes the user plane function 500 in the fifth embodiment, the access mobility management function 600 in the sixth embodiment, the session management function 700 in the seventh embodiment, and the network storage function 800 in the eighth embodiment.
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-mentioned session management method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated 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.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (27)

1. A session management method applied to a User Plane Function (UPF) is characterized by comprising the following steps:
when a first Session Management Function (SMF) establishing communication connection with the UPF fails, taking a second SMF as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set;
establishing a communication connection with the second SMF.
2. The session management method of claim 1, wherein before taking a second SMF as a backup for the first SMF, further comprising:
and acquiring the SMF set.
3. The session management method of claim 2, wherein obtaining the set of SMFs comprises:
receiving the set of SMFs sent by the first SMF when a communication connection is established with the first SMF.
4. The session management method according to any of claims 1-3, wherein the establishing a communication connection with the second SMF comprises:
and sending a downlink data notification to the second SMF so that the second SMF requests a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the downlink data notification comprises a session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the first SMF is located.
5. A session management method is applied to access a mobile management function (AMF), and is characterized by comprising the following steps:
when a first Session Management Function (SMF) establishing communication connection with the AMF fails, taking a second SMF as a backup of the first SMF; wherein the first SMF and the second SMF belong to the same SMF set;
establishing a communication connection with the second SMF.
6. The session management method of claim 5, wherein before taking the second SMF as a backup of the first SMF, further comprising:
and acquiring the SMF set.
7. The session management method of claim 6, wherein obtaining the set of SMFs comprises:
sending an SMF registration request or a service discovery request to a network storage function (NRF);
receiving a response SMF registration request or a response service discovery request of the NRF, wherein the response SMF registration request or the response service discovery request comprises the SMF set.
8. The session management method according to any of claims 5-7, wherein the establishing a communication connection with the second SMF comprises:
and sending a session establishment request to the second SMF so that the second SMF requests a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the session establishment request comprises a session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the first SMF is located.
9. A session management method is applied to a Session Management Function (SMF), and is characterized by comprising the following steps:
sending an SMF registration request message or an SMF service registration request to a network storage function (NRF), wherein the SMF registration request message or the SMF service registration request comprises a packet where the SMF is located;
receiving a registration response message or a service registration response message sent by the NRF, wherein the registration response message or the service registration response message comprises a SMF set which comprises other SMFs having the same group with the SMF.
10. The session management method according to claim 9, further comprising:
and when a communication connection is established with a User Plane Function (UPF), sending the SMF set to the UPF.
11. The session management method according to claim 9, further comprising:
receiving a downlink data notification sent by a user plane function UPF;
and requesting a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the downlink data notification comprises the session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the SMF is located.
12. The session management method according to claim 9, further comprising:
receiving a session establishment request sent by an access mobile management function (AMF);
and requesting a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the session establishment request comprises the session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where an SMF is located.
13. A session management method is applied to a network storage function (NRF), and is characterized by comprising the following steps:
receiving an SMF registration request message or an SMF service registration request sent by a Session Management Function (SMF), wherein the SMF registration request message or the SMF service registration request comprises a packet where the SMF is located;
sending a registration response message or a service registration response message to the SMF, the registration response message or the service registration response message including a set of SMFs including other SMFs having the same group as the SMF.
14. The session management method according to claim 13, further comprising:
receiving an SMF registration request or a service discovery request sent by an access mobile management function (AMF);
sending a response SMF registration request or a response service discovery request to the AMF, the response SMF registration request or the response service discovery request including the set of SMFs.
15. A user plane function, comprising:
the system comprises a first SMF backup acquisition module, a second SMF backup acquisition module and a first session management function (UPF) backup acquisition module, wherein the first SMF backup acquisition module is used for taking the second SMF as the backup of the first SMF when the SMF of the first session management function establishing communication connection with a User Plane Function (UPF) fails; wherein the first SMF and the second SMF belong to the same SMF set;
and the first communication connection module is used for establishing communication connection with the second SMF.
16. The user plane function of claim 15, further comprising:
a first SMF set receiving module, configured to receive the SMF set sent by the first SMF when a communication connection is established with the first SMF.
17. The user plane function according to claim 15 or 16, wherein the first communication connection module is configured to:
and sending a downlink data notification to the second SMF so that the second SMF requests a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the downlink data notification comprises a session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the first SMF is located.
18. An access mobility management function, comprising:
the second SMF backup obtaining module is used for taking the second SMF as the backup of the first SMF when the first session management function SMF which establishes communication connection with the access mobile management function AMF fails; wherein the first SMF and the second SMF belong to the same SMF set;
and the second communication connection module is used for establishing communication connection with the second SMF.
19. The access mobility management function of claim 18, further comprising:
a first sending module, configured to send an SMF registration request or a service discovery request to a network storage function NRF;
a second SMF set receiving module, configured to receive a response SMF registration request or a response service discovery request of the NRF, where the response SMF registration request or the response service discovery request includes the SMF set.
20. The access mobility management function according to claim 18 or 19, wherein the second communication connection module is configured to:
and sending a session establishment request to the second SMF so that the second SMF requests a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the session establishment request comprises a session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the first SMF is located.
21. A session management function, comprising:
a second sending module, configured to send an SMF registration request message or an SMF service registration request to a network storage function NRF, where the SMF registration request message or the SMF service registration request includes a packet where the SMF is located;
a third SMF set receiving module, configured to receive a registration response message or a service registration response message sent by the NRF, where the registration response message or the service registration response message includes a SMF set, and the SMF set includes other SMFs having the same group as the SMF.
22. The session management function of claim 21, further comprising a first SMF set sending module configured to send the set of SMFs to a user plane function, UPF, when a communication connection is established with the UPF.
23. The session management function of claim 21, further comprising:
a downlink data notification receiving module, configured to receive a downlink data notification sent by a user plane function UPF;
and the request message sending module is used for requesting a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the downlink data notification comprises the session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the SMF is located.
24. The session management function according to any of claims 21-23, further comprising:
a session establishment request receiving module, configured to receive a session establishment request sent by an access mobility management function AMF;
and the request message sending module is used for requesting a user context from an Unstructured Data Storage Function (UDSF) according to a session ID, wherein the session establishment request comprises the session ID, and the session ID is an identifier of a session established between User Equipment (UE) and a mobile data network where the SMF is located.
25. A network storage function, comprising:
a first receiving module, configured to receive an SMF registration request message or an SMF service registration request sent by a session management function SMF, where the SMF registration request message or the SMF service registration request includes a packet where the SMF is located;
a third sending module, configured to send a registration response message or a service registration response message to the SMF, where the registration response message or the service registration response message includes a SMF set that includes other SMFs having the same group as the SMF.
26. The network storage function of claim 25, further comprising:
a second receiving module, configured to receive an SMF registration request or a service discovery request sent by an access mobility management function AMF;
a fourth sending module, configured to send a response SMF registration request or a response service discovery request to the AMF, where the response SMF registration request or the response service discovery request includes the SMF set.
27. A network system comprising a user plane function according to any of claims 15-17, an access mobility management function according to any of claims 18-20, a session management function according to any of claims 21-24 and a network storage function according to any of claims 25-26.
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113260010A (en) * 2021-07-06 2021-08-13 中兴通讯股份有限公司 SMF discovery method, device, electronic equipment and medium
CN113316269A (en) * 2021-04-28 2021-08-27 武汉虹旭信息技术有限责任公司 Session management method and device
CN113950058A (en) * 2020-07-17 2022-01-18 华为技术有限公司 Communication method and device
US20220022062A1 (en) * 2018-11-23 2022-01-20 Zte Corporation Methods and Related Devices for Implementing Disaster Recovery
WO2022028668A1 (en) * 2020-08-03 2022-02-10 Nokia Technologies Oy Apparatus, method and computer program
CN114339854A (en) * 2022-03-01 2022-04-12 中兴通讯股份有限公司 Session management method, communication device, and storage medium
CN115134936A (en) * 2021-03-24 2022-09-30 海能达通信股份有限公司 User session processing method and related device
CN115243400A (en) * 2022-08-04 2022-10-25 广州爱浦路网络技术有限公司 Service session reconstruction method, device and network element
WO2022267688A1 (en) * 2021-06-23 2022-12-29 中兴通讯股份有限公司 Method and apparatus for discovering standby smf, and electronic device and medium
WO2023284232A1 (en) * 2021-07-12 2023-01-19 武汉绿色网络信息服务有限责任公司 Path addressing method and network service system
WO2023137681A1 (en) * 2022-01-21 2023-07-27 Zte Corporation Method for virtual network communication, apparatus, and storage medium
WO2023185800A1 (en) * 2022-03-29 2023-10-05 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for processing smf set mismatch
WO2024066956A1 (en) * 2022-09-28 2024-04-04 中兴通讯股份有限公司 Network function management method and apparatus, electronic device and storage medium
WO2024125269A1 (en) * 2022-12-12 2024-06-20 中兴通讯股份有限公司 Voice service establishment method, network device, and storage medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018127147A1 (en) * 2017-01-05 2018-07-12 Huawei Technologies Co., Ltd. Systems and methods for application-friendly protocol data unit (pdu) session management
CN108462735A (en) * 2017-02-21 2018-08-28 华为技术有限公司 A kind of methods, devices and systems of selection conversation management functional entity

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018127147A1 (en) * 2017-01-05 2018-07-12 Huawei Technologies Co., Ltd. Systems and methods for application-friendly protocol data unit (pdu) session management
CN108462735A (en) * 2017-02-21 2018-08-28 华为技术有限公司 A kind of methods, devices and systems of selection conversation management functional entity

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZTE: ""C4-187410 was 7335_23.527_R15_SMF Restoration"", 《3GPP TSG_CT\WG4_PROTOCOLLARS_EX-CN4》 *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220022062A1 (en) * 2018-11-23 2022-01-20 Zte Corporation Methods and Related Devices for Implementing Disaster Recovery
US11889330B2 (en) * 2018-11-23 2024-01-30 Zte Corporation Methods and related devices for implementing disaster recovery
CN113950058A (en) * 2020-07-17 2022-01-18 华为技术有限公司 Communication method and device
WO2022012598A1 (en) * 2020-07-17 2022-01-20 华为技术有限公司 Communication method and apparatus
CN116349275A (en) * 2020-08-03 2023-06-27 诺基亚技术有限公司 Apparatus, method and computer program
WO2022028668A1 (en) * 2020-08-03 2022-02-10 Nokia Technologies Oy Apparatus, method and computer program
CN115134936A (en) * 2021-03-24 2022-09-30 海能达通信股份有限公司 User session processing method and related device
CN113316269A (en) * 2021-04-28 2021-08-27 武汉虹旭信息技术有限责任公司 Session management method and device
CN113316269B (en) * 2021-04-28 2022-07-19 武汉虹旭信息技术有限责任公司 Session management method and device
WO2022267688A1 (en) * 2021-06-23 2022-12-29 中兴通讯股份有限公司 Method and apparatus for discovering standby smf, and electronic device and medium
CN113260010A (en) * 2021-07-06 2021-08-13 中兴通讯股份有限公司 SMF discovery method, device, electronic equipment and medium
WO2023284232A1 (en) * 2021-07-12 2023-01-19 武汉绿色网络信息服务有限责任公司 Path addressing method and network service system
WO2023137681A1 (en) * 2022-01-21 2023-07-27 Zte Corporation Method for virtual network communication, apparatus, and storage medium
WO2023165277A1 (en) * 2022-03-01 2023-09-07 中兴通讯股份有限公司 Session management method, communication device, and storage medium
CN114339854A (en) * 2022-03-01 2022-04-12 中兴通讯股份有限公司 Session management method, communication device, and storage medium
WO2023185800A1 (en) * 2022-03-29 2023-10-05 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for processing smf set mismatch
CN115243400A (en) * 2022-08-04 2022-10-25 广州爱浦路网络技术有限公司 Service session reconstruction method, device and network element
WO2024066956A1 (en) * 2022-09-28 2024-04-04 中兴通讯股份有限公司 Network function management method and apparatus, electronic device and storage medium
WO2024125269A1 (en) * 2022-12-12 2024-06-20 中兴通讯股份有限公司 Voice service establishment method, network device, and storage medium

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