CN115087053A - Session creation method, device and AMF - Google Patents
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Abstract
The invention provides a session creation method, a session creation device and an AMF (advanced metering framework), wherein the method comprises the following steps: before a session is established, slice information corresponding to the session is acquired; selecting a Session Management Function (SMF) according to the slice information, and sending a first session creation request message to the selected SMF; in the embodiment of the invention, the AMF obtains the slice information corresponding to the session before the session is created, so that the AMF can select the SMF and create the session according to the correct slice information, thereby avoiding the process of inserting the SMF twice, shortening the switching time delay and improving the user service experience; meanwhile, AMF does not need to configure a special interoperation slice, and the workload of local data is reduced.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a session creation method, an apparatus, and an AMF.
Background
The current scheme for slice interoperation is: when a user carries a multi-slice Session and switches from 4G to 5G, if a Session Management Function (SMF) service area does not need to be crossed, Access and Mobility Management Function (AMF) sends a signaling message to an anchor point SMF without carrying Session switching information, and the anchor point SMF does not need to judge whether slice information carried by the AMF is consistent with Session slice information stored by the anchor point SMF; when crossing SMF service areas, the AMF supports accessing the SMF (visual-SMF) or Intermediate SMF (Intermediate-SMF, I-SMF) reselection based on a Topology Enhancement Technology (ETSUN) mechanism, namely the AMF needs to configure Single Network Slice Selection Assistance Information (S-NSSAI) special for interoperation to select the V-SMF or the I-SMF, and carries the special Slice for interoperation in related signaling messages sent to the AMF. AMF also needs to support the reselection of AMF and V-SMF or I-SMF according to the slice ID corresponding to the session returned by the anchor SMF.
The above slice interoperation scheme has the following defects:
if a provincial roaming user is crossed, the AMF needs to select an I-SMF by using the S-NSSAI of the interoperation special slice, and sends a session creation message to the anchor point SMF through the I-SMF, and when the session message returned by the anchor point SMF carries the correct slice S-NSSAI, the AMF needs to trigger the reselection of the I-SMF due to the inconsistency of the S-NSSAI and the anchor point SMF, so that the I-SMF needs to be inserted twice in the whole switching process, the process is complicated, the switching time is long, and the service experience of a final user is influenced. And the interoperation special slice S-NSSAI configured by the AMF can only serve the scene of slice interoperation, the effect is limited, the configuration needs to be planned and configured in the whole network, and the workload of office data is large.
Disclosure of Invention
The embodiment of the invention aims to provide a session creation method, a session creation device and an AMF (advanced multimedia broadcast framework), so as to solve the problems that the slice interoperation scheme in the prior art may cause complicated flow of inserting two I-SMFs and needs whole network planning and configuration.
In order to solve the above problem, an embodiment of the present invention provides a session creation method, executed by an access and mobility management function AMF, including:
before a session is established, slice information corresponding to the session is acquired;
and selecting a Session Management Function (SMF) according to the slice information, and sending a first session creation request message to the selected SMF.
Before the session is created, slice information corresponding to the session is acquired, and the acquisition includes:
before the session is established, acquiring the slice information corresponding to the session according to the network identification corresponding to the session and the user subscription information;
alternatively, the first and second electrodes may be,
before the session is established, slice information corresponding to the session is acquired from the anchor SMF.
Before the session is created, acquiring slice information corresponding to the session according to a network identifier corresponding to the session and user subscription information, including:
before creating a session, acquiring a network identifier and user subscription information corresponding to the session, wherein the user subscription information comprises: mapping relation between network identification signed by user and slice information;
inquiring in the user subscription information according to a network identifier corresponding to a session, and determining that the slice information having a mapping relation with the network identifier is the slice information corresponding to the session;
wherein the first session creation request message includes: slice information corresponding to the session.
In the subscription information, the mapping relationship between the network identifier subscribed by the user and the slice information is as follows: the N network identifiers correspond to 1 slice of information, where N is an integer greater than or equal to 1.
Before session creation, obtaining slice information corresponding to a session from an anchor SMF, including:
before session creation, sending a second session creation request message to the anchor SMF;
receiving a second session creation response message sent by the anchor SMF, wherein the second session creation response message comprises: slice information corresponding to the session and a network identifier corresponding to the session;
and determining the slice information corresponding to the session according to the second session creation response message.
Wherein, before sending the second session creation request message to the anchor SMF, the method further comprises:
determining the IP address of the anchor SMF according to the fully qualified domain name FQDN of the anchor SMF;
and judging that the user is a 4G or 5G interoperation user according to the IP address of the anchor SMF, and the user is not in the range of the tracking area of the anchor SMF.
The embodiment of the invention also provides a session creation device, which is applied to the access and mobility management function AMF and comprises the following steps:
the acquisition module is used for acquiring the slice information corresponding to the session before the session is established;
and the session creation module is used for selecting a Session Management Function (SMF) according to the slice information and sending a first session creation request message to the selected SMF.
An embodiment of the present invention further provides an access and mobility management function AMF, including a processor and a transceiver, where the transceiver receives and transmits data under the control of the processor, and the processor is configured to perform the following operations:
before a session is established, slice information corresponding to the session is acquired;
and selecting a Session Management Function (SMF) according to the slice information, and sending a first session creation request message to the selected SMF.
Wherein the processor is further configured to:
before the session is established, acquiring the slice information corresponding to the session according to the network identification corresponding to the session and the user subscription information;
alternatively, the first and second electrodes may be,
before the session is established, slice information corresponding to the session is acquired from the anchor SMF.
Wherein the processor is further configured to:
before creating a session, acquiring a network identifier and user subscription information corresponding to the session, wherein the user subscription information comprises: mapping relation between network identification signed by user and slice information;
inquiring in the user subscription information according to a network identifier corresponding to a session, and determining that the slice information which has a mapping relation with the network identifier is the slice information corresponding to the session;
wherein the first session creation request message includes: slice information corresponding to the session.
In the subscription information, the mapping relationship between the network identifier subscribed by the user and the slice information is as follows: the N network identifiers correspond to 1 slice of information, where N is an integer greater than or equal to 1.
Wherein the processor is further configured to:
before session creation, sending a second session creation request message to the anchor SMF;
receiving a second session creation response message sent by the anchor SMF, wherein the second session creation response message comprises: slice information corresponding to the session and a network identifier corresponding to the session;
and determining the slice information corresponding to the session according to the second session creation response message.
Wherein the processor is further configured to:
determining the IP address of the anchor SMF according to the fully qualified domain name FQDN of the anchor SMF;
and judging that the user is a 4G or 5G interoperation user according to the IP address of the anchor SMF, and the user is not in the range of the tracking area of the anchor SMF.
The embodiment of the present invention further provides an AMF, which includes a memory, a processor, and a program stored in the memory and capable of running on the processor, and when the processor executes the program, the session creation method as described above is implemented.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the session creation method described above.
The technical scheme of the invention at least has the following beneficial effects:
in the session creation method, the session creation device and the AMF, the AMF obtains the slice information corresponding to the session before the session is created, so that the AMF can select the SMF and create the session according to the correct slice information, the process of inserting the SMF twice is avoided, the switching time delay is shortened, and the user service experience is improved; meanwhile, AMF does not need to configure a special interoperation slice, and the workload of local data is reduced.
Drawings
Fig. 1 is a flowchart illustrating steps of a session creation method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a session creation apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an AMF according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a session creation method, which is executed by an access and mobility management function AMF, and includes:
and 102, selecting a Session Management Function (SMF) according to the slice information, and sending a first session creation request message to the selected SMF.
The slice information includes: S-NSSAI of sections. The AMF selects the SMF as V-SMF or I-SMF, namely step 102 is: the AMF selects an appropriate V-SMF or I-SMF according to the obtained slice information and TA (Tracking Area), and transmits a first session creation request message to the selected V-SMF or I-SMF.
In the embodiment of the invention, before the session is established, the AMF obtains the slice information corresponding to the session, and the S-NSSAI of the special slice for the interoperation in the whole network is not needed, so that the office data configuration is saved, the operation and maintenance pressure is reduced, and the isolation among the slices can be realized. And before the session is established, the AMF obtains the slice information corresponding to the session, so that secondary insertion of the AMF into a V/I-SMF flow is avoided, the switching time delay is shortened, and the user service experience is improved. In the embodiment of the invention, only some functions need to be added by the AMF, other network elements do not need to be changed, and the influence on the current network is small.
In at least one embodiment of the present invention, two schemes for acquiring slice information corresponding to a session before the session is created are provided, which respectively are:
the first scheme comprises the following steps: before the session is established, the AMF acquires the slice information corresponding to the session according to the network identification corresponding to the session and the user subscription information.
Scheme two is as follows: before the session is created, the AMF acquires the slice information corresponding to the session from the anchor SMF.
For the first scheme, before the session is created, the obtaining of the slice information corresponding to the session according to the network identifier corresponding to the session and the user subscription information includes:
before session creation, the AMF obtains a network identifier and user subscription information corresponding to the session, where the user subscription information includes: mapping relation between network identification signed by user and slice information;
inquiring in the user subscription information according to a network identifier corresponding to a session, and determining that the slice information which has a mapping relation with the network identifier is the slice information corresponding to the session;
wherein the first session creation request message includes: slice information corresponding to the session.
As an optional embodiment, the AMF obtains a network identifier corresponding to the session from an MME (Mobility Management Entity) through the context request message and the context response message, where the network identifier specifically may be: access Point Name (APN). Optionally, the context response message further includes: a Fully Qualified Domain Name (FQDN) of an anchor SMF or PGW-C (Packet data network-controlled-platform function, PDN Gateway control plane).
As another optional embodiment, the AMF obtains the user subscription information from a Unified Data Manager (UDM) through a "numm _ SDM _ Get message", where the network identifier of the user subscription may specifically be: data Network Name (DNN); namely, the AMF obtains the mapping relationship between the DNN signed by the user and the slice information from the UDM.
Wherein, both DNN and APN are network identities, which can be considered as consistent. The AMF deduces the mapping relationship between the APN of the session and the slice information through the network identifier corresponding to the session and the user subscription information, and then can obtain the slice information corresponding to the session.
Further, the AMF selects a proper V-SMF or I-SMF according to the obtained slice information and TA (Tracking Area), sends a first session creation request message to the selected V-SMF or I-SMF, and carries the slice information corresponding to the session in the first session creation request message.
In the subscription information, the mapping relationship between the network identifier subscribed by the user and the slice information is as follows: the N network identifiers correspond to 1 slice of information, where N is an integer greater than or equal to 1.
In other words, the scheme is applicable to mapping of slices to DNNs as "1: n ", in which a unique corresponding slice can be determined from one DNN. While other scenarios, such as mapping of slices to DNN is "M: 1' scene, according to a DNN, a unique corresponding slice can not be obtained; m is greater than 1.
The scheme does not need to additionally configure interoperation special slices in the whole network, and can meet different slice isolation scenes; the AMF does not need to initiate a secondary insertion process of the V/I-SMF, and the switching time delay is shortened; and for slices and DNNs is 1: in the N scenario, the intercommunication between the whole network AMF and the SMF network is not needed under the scheme, and the requirement on the AMF function is relatively low.
For the second scheme, before session creation, the AMF acquires, from the anchor SMF, slice information corresponding to the session, including:
before session creation, sending a second session creation request message to the anchor SMF;
receiving a second session creation response message sent by the anchor SMF, wherein the second session creation response message comprises: slice information corresponding to the session and a network identifier corresponding to the session;
and determining the slice information corresponding to the session according to the second session establishment response message.
Wherein, before sending the second session creation request message to the anchor SMF, the method further comprises:
determining the IP address of the anchor SMF according to the fully qualified domain name FQDN of the anchor SMF;
and judging that the user is a 4G or 5G interoperation user according to the IP address of the anchor SMF, and the user is not in the range of the tracking area of the anchor SMF.
In other words, when the AMF determines that it is a subscriber of the 4/5G interoperability and is not in the service area of the anchor SMF and needs to insert a V/I-SMF, it does not first directly select and insert a V/I-SMF, but directly initiates a session creation request (i.e., a second session creation request message) to the anchor SMF. And the anchor point SMF directly sends the slice information corresponding to the correct session to the AMF, and the AMF sends the V/I-SMF insertion flow after obtaining the slice information corresponding to the correct session.
For example, the AMF obtains the IP address of the anchor SMF by obtaining the FQDN of the SMF/PGW-C from the MME, and determines that the result is 4/5G interoperation user, but when the user is not in the TA range of the anchor SMF and needs to insert the V/I-SMF, the AMF does not initiate a request for inserting the V/I-SMF, but directly initiates a second session creation request message to the anchor SMF without carrying the slice information corresponding to the session. After receiving the second session creation request message of the AMF, the anchor SMF directly sends the session information (including the slice information and the DNN corresponding to the session, etc.) created by the previous user to the AMF through the second session creation response message. And after receiving the slice information corresponding to the session sent by the anchor SMF, the AMF selects a proper V/I-SMF according to the slice information and the TA information and sends a first session creation request message to the selected V/I-SMF. And the V/I-SMF transmits the first session creation request message to the anchor point SMF, and transmits the first session creation response message returned by the anchor point SMF to the AMF after receiving the first session creation response message.
In the second scheme, the inter-operation special slices do not need to be additionally configured in the whole network, and different slice isolation scenes can be met; the AMF does not need to initiate a secondary insertion process of the V/I-SMF, and the switching time delay is shortened; and no additional requirements are imposed on the mapping relationship of the slices and the DNN. However, the scheme requires the intercommunication between the whole network AMF and the SMF network, and has high requirements on the function of the AMF.
It should be noted that, in practical applications, a person skilled in the art may select, based on different service requirements, different networking schemes, and the like, to obtain slice information corresponding to a session through the scheme one or the scheme two; and is not particularly limited herein.
In conclusion, the AMF obtains the slice information corresponding to the session before the session is created, so that the AMF can perform SMF selection and session creation according to correct slice information, the process of inserting SMFs twice is avoided, the switching time delay is shortened, and the user service experience is improved; meanwhile, AMF does not need to configure a special interoperation slice, and the workload of local data is reduced.
As shown in fig. 2, an embodiment of the present invention further provides a session creation apparatus, which is applied to an access and mobility management function AMF, and includes:
an obtaining module 201, configured to obtain slice information corresponding to a session before the session is created;
and a session creating module 202, configured to select a session management function SMF according to the slice information, and send a first session creation request message to the selected SMF.
As an alternative embodiment, the obtaining module 201 includes:
the first acquisition sub-module is used for acquiring the slice information corresponding to the session according to the network identifier corresponding to the session and the user subscription information before the session is established;
and/or the presence of a gas in the gas,
and the second acquisition submodule is used for acquiring the slice information corresponding to the session from the anchor point SMF before the session is established.
As an alternative embodiment, the first obtaining sub-module includes:
a first unit, configured to acquire a network identifier and user subscription information corresponding to a session before the session is created, where the user subscription information includes: mapping relation between network identification signed by user and slice information;
a second unit, configured to query the user subscription information according to a network identifier corresponding to a session, and determine that slice information having a mapping relationship with the network identifier is the slice information corresponding to the session;
wherein the first session creation request message includes: slice information corresponding to the session.
As an optional embodiment, in the subscription information, a mapping relationship between a network identifier subscribed by a user and slice information is as follows: the N network identifiers correspond to 1 slice of information, where N is an integer greater than or equal to 1.
As an alternative embodiment, the second sub-obtaining module includes:
a third unit, configured to send a second session creation request message to the anchor SMF before session creation;
a fourth unit, configured to receive a second session creation response message sent by the anchor SMF, where the second session creation response message includes: slice information corresponding to the session and a network identifier corresponding to the session;
and a fifth unit, configured to determine, according to the second session creation response message, slice information corresponding to the session.
As an alternative embodiment, the apparatus further comprises:
the address determination module is used for determining the IP address of the anchor SMF according to the fully qualified domain name FQDN of the anchor SMF;
and the judging module is used for judging that the user is a 4G or 5G interoperation user according to the IP address of the anchor SMF, and the user is not in the range of the tracking area of the anchor SMF.
In the embodiment of the invention, the AMF obtains the slice information corresponding to the session before the session is created, so that the AMF can select the SMF and create the session according to the correct slice information, thereby avoiding the process of inserting the SMF twice, shortening the switching time delay and improving the user service experience; meanwhile, AMF does not need to configure special interoperation slices, and the workload of local data is reduced.
It should be noted that the session creation apparatus provided in the embodiment of the present invention is an apparatus capable of executing the session creation method, and all embodiments of the session creation method are applicable to the apparatus and can achieve the same or similar beneficial effects.
As shown in fig. 3, an embodiment of the present invention further provides an access and mobility management function AMF, which includes a processor 300 and a transceiver 310, where the transceiver 310 receives and transmits data under the control of the processor 300, and is configured to perform the following operations:
before a session is established, slice information corresponding to the session is acquired;
and selecting a Session Management Function (SMF) according to the slice information, and sending a first session creation request message to the selected SMF.
As an alternative embodiment, the processor 300 is further configured to perform the following operations:
before the session is established, acquiring the slice information corresponding to the session according to the network identification corresponding to the session and the user subscription information;
alternatively, the first and second liquid crystal display panels may be,
before the session is established, slice information corresponding to the session is acquired from the anchor SMF.
As an alternative embodiment, the processor 300 is further configured to perform the following operations:
before creating a session, acquiring a network identifier and user subscription information corresponding to the session, wherein the user subscription information comprises: mapping relation between network identification signed by user and slice information;
inquiring in the user subscription information according to a network identifier corresponding to a session, and determining that the slice information which has a mapping relation with the network identifier is the slice information corresponding to the session;
wherein the first session creation request message includes: slice information corresponding to the session.
As an optional embodiment, in the subscription information, a mapping relationship between a network identifier subscribed by a user and slice information is as follows: the N network identifiers correspond to 1 slice of information, where N is an integer greater than or equal to 1.
As an alternative embodiment, the processor 300 is further configured to perform the following operations:
before session creation, sending a second session creation request message to the anchor SMF;
receiving a second session creation response message sent by the anchor SMF, wherein the second session creation response message comprises: slice information corresponding to the session and a network identifier corresponding to the session;
and determining the slice information corresponding to the session according to the second session creation response message.
As an alternative embodiment, the processor 300 is further configured to perform the following operations:
determining the IP address of the anchor SMF according to the fully qualified domain name FQDN of the anchor SMF;
and judging that the user is a 4G or 5G interoperation user according to the IP address of the anchor SMF, and the user is not in the range of the tracking area of the anchor SMF.
In the embodiment of the invention, the AMF obtains the slice information corresponding to the session before the session is created, so that the AMF can select the SMF and create the session according to the correct slice information, thereby avoiding the process of inserting the SMF twice, shortening the switching time delay and improving the user service experience; meanwhile, AMF does not need to configure a special interoperation slice, and the workload of local data is reduced.
It should be noted that, the AMF provided by the embodiment of the present invention is an AMF capable of executing the session creation method, and all embodiments of the session creation method are applicable to the AMF and can achieve the same or similar beneficial effects.
An embodiment of the present invention further provides an AMF, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements each process in the above-described embodiment of the session creation method when executing the program, and can achieve the same technical effect, and details are not repeated here to avoid repetition.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements each process in the above-described embodiment of the session creation method, 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.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.
These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (15)
1. A session creation method, performed by an access and mobility management function, AMF, comprising:
before a session is established, slice information corresponding to the session is acquired;
and selecting a Session Management Function (SMF) according to the slice information, and sending a first session creation request message to the selected SMF.
2. The method of claim 1, wherein obtaining slice information corresponding to a session before the session is created comprises:
before the session is established, acquiring the slice information corresponding to the session according to the network identification corresponding to the session and the user subscription information;
alternatively, the first and second electrodes may be,
before the session is established, slice information corresponding to the session is acquired from the anchor SMF.
3. The method of claim 2, wherein before the session is created, acquiring slice information corresponding to the session according to the network identifier corresponding to the session and the subscription information of the user, comprises:
before creating a session, acquiring a network identifier and user subscription information corresponding to the session, wherein the user subscription information comprises: mapping relation between the network identification signed by the user and the slice information;
inquiring in the user subscription information according to a network identifier corresponding to a session, and determining that the slice information which has a mapping relation with the network identifier is the slice information corresponding to the session;
wherein the first session creation request message includes: slice information corresponding to the session.
4. The method of claim 3, wherein in the subscription information, the mapping relationship between the network identifier subscribed by the user and the slice information is: the N network identifiers correspond to 1 slice of information, where N is an integer greater than or equal to 1.
5. The method of claim 2, wherein obtaining slice information corresponding to the session from the anchor SMF before the session is created comprises:
before the session is established, sending a second session establishment request message to the anchor point SMF;
receiving a second session creation response message sent by the anchor SMF, wherein the second session creation response message comprises: slice information corresponding to the session and a network identifier corresponding to the session;
and determining the slice information corresponding to the session according to the second session creation response message.
6. The method of claim 5, wherein prior to sending the second session creation request message to the anchor SMF, the method further comprises:
determining the IP address of the anchor SMF according to the fully qualified domain name FQDN of the anchor SMF;
and judging that the user is a 4G or 5G interoperation user according to the IP address of the anchor SMF, and the user is not in the range of the tracking area of the anchor SMF.
7. A session creation apparatus, applied to an access and mobility management function, AMF, and comprising:
the acquisition module is used for acquiring the slice information corresponding to the session before the session is established;
and the session creation module is used for selecting a Session Management Function (SMF) according to the slice information and sending a first session creation request message to the selected SMF.
8. An access and mobility management function, AMF, comprising a processor and a transceiver, the transceiver receiving and transmitting data under control of the processor, characterized in that the processor is adapted to:
before a session is established, slice information corresponding to the session is acquired;
and selecting a Session Management Function (SMF) according to the slice information, and sending a first session creation request message to the selected SMF.
9. The AMF of claim 8, wherein the processor is further configured to:
before the session is established, acquiring the slice information corresponding to the session according to the network identification corresponding to the session and the user subscription information;
alternatively, the first and second electrodes may be,
before the session is established, slice information corresponding to the session is acquired from the anchor SMF.
10. The AMF of claim 9, wherein the processor is further configured to:
before a session is established, acquiring a network identifier and user subscription information corresponding to the session, wherein the user subscription information comprises: mapping relation between network identification signed by user and slice information;
inquiring in the user subscription information according to a network identifier corresponding to a session, and determining that the slice information which has a mapping relation with the network identifier is the slice information corresponding to the session;
wherein the first session creation request message includes: slice information corresponding to the session.
11. The AMF of claim 10, wherein the mapping relationship between the network identifier subscribed by the user and the slice information in the subscription information is as follows: the N network identifiers correspond to 1 slice of information, where N is an integer greater than or equal to 1.
12. The AMF of claim 9, wherein the processor is further configured to:
before session creation, sending a second session creation request message to the anchor SMF;
receiving a second session creation response message sent by the anchor SMF, wherein the second session creation response message comprises: slice information corresponding to the session and a network identifier corresponding to the session;
and determining the slice information corresponding to the session according to the second session creation response message.
13. The AMF of claim 12, wherein the processor is further configured to:
determining the IP address of the anchor SMF according to the fully qualified domain name FQDN of the anchor SMF;
and judging that the user is a 4G or 5G interoperation user according to the IP address of the anchor SMF, and the user is not in the range of the tracking area of the anchor SMF.
14. An AMF comprising a memory, a processor, and a program stored on the memory and executable on the processor; characterized in that the processor implements the session creation method according to any one of claims 1 to 6 when executing the program.
15. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of a session creation method according to any one of claims 1 to 6.
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