CN115835337A - Method, system and medium for selecting TNGF network element based on 5G core network - Google Patents
Method, system and medium for selecting TNGF network element based on 5G core network Download PDFInfo
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Abstract
The invention discloses a method, a system and a medium for selecting a TNGF network element based on a 5G core network, which can be widely applied to the technical field of the 5G core network. According to the method, after the shortest distances between the position information of the UE node and the position information of the TNGF node are calculated, all the shortest distances are sorted, one TNGF node is selected as a TNGF node to be compared, the relation between the section data of the TNGF node to be compared and the section data of the UE node is compared, and when the TNGF node to be compared and the TNGF node to be compared are the same, the network element of the TNGF node to be compared is used as a target TNGF network element for non-trusted 3GPP access, so that the currently selected TNGF network element can support the section required by the UE, and the accuracy of the connection process of the terminal and a 5G core network is improved.
Description
Technical Field
The invention relates to the technical field of 5G core networks, in particular to a method, a system and a medium for selecting a TNGF network element based on a 5G core network.
Background
In the related technology, the TNGF network element mainly functions to enable the terminal to access to the 5G core network from the trusted non-3GPP network. Currently, through trusted non-3GPP access registration by 5GC, when the originally selected TNGF cannot support the slice required by the UE, the AMF is allowed to trigger TNGF relocation, reselecting a different TNGF to serve the UE. However, at present, one TNGF network element is randomly selected from a plurality of TNGF network elements, but when the selected TNGF network element cannot be accessed through the trusted non-3GPP, the connection process between the terminal and the 5G core network is affected.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a method, a system and a medium for selecting a TNGF network element based on a 5G core network, which can effectively and accurately select a section required by the TNGF network element to support UE.
In one aspect, an embodiment of the present invention provides a method for selecting a TNGF network element based on a 5G core network, including the following steps:
when the AMF triggers the relocation of the TNGF network element, acquiring UE nodes and first position information of the UE nodes and second position information of the TNGF nodes and the TNGF nodes, which are acquired by the AMF;
calculating the shortest distance from the UE node to each TNGF node according to the first position information and the second position information;
sequencing all the shortest distances to obtain a target distance list;
selecting a TNGF node from the target distance list as a TNGF node to be compared;
acquiring first slice data of the TNGF node to be compared and second slice data of the UE node from the AMF;
and when the first sliced data is the same as the second sliced data, taking the network element of the TNGF node to be compared as a target TNGF network element to perform non-trusted 3GPP access.
In some embodiments, the sorting all the shortest distances to obtain a target distance list includes:
and sequencing all the shortest distances in a descending manner to obtain a target distance list.
In some embodiments, the selecting one TNGF node from the target distance list as the TNGF node to be compared includes:
and selecting the first TNGF node in the sequence from the target distance list as the TNGF node to be compared.
In some embodiments, the method further comprises the steps of:
and when the first section data is different from the second section data, selecting a first TNGF node in the sequence from the rest TNGF nodes as a TNGF node to be compared.
In some embodiments, the performing non-trusted 3GPP access on the network element of the to-be-compared TNGF node as a target TNGF network element includes:
taking the network element of the TNGF node to be compared as a target TNGF network element;
sending an initial context setting request through the target TNGF network element, and sending the IP address of the target TNGF network element to the current TNGF network element so that the current TNGF network element sends the IP address to the UE node;
and the UE node sends an EAP-Response/5G-Notification message to the current TNGF network element, and after the current TNGF network element sends a message containing the EAP-Success message to the AMF, the UE node establishes NWt connection with the target TNGF network element.
In some embodiments, after the step of obtaining the AMF-collected first location information of the UE node and the UE node, and second location information of the TNGF node and the TNGF node, the method further comprises the steps of:
acquiring third position information of the AMF;
and constructing a directed topological graph according to the first position information, the second position information and the third position information.
In some embodiments, after the step of calculating the shortest distance of the UE node to each of the TNGF nodes based on the first location information and the second location information, the method further comprises the steps of:
and displaying the shortest distance, the first position information, the second position information and the third position information by the directed topological graph.
In another aspect, an embodiment of the present invention provides a system for selecting a TNGF network element based on a 5G core network, including:
a first obtaining module, configured to obtain, when the AMF triggers a TNGF network element relocation, first location information of a UE node and the UE node and second location information of the TNGF node and the TNGF node, which are acquired by the AMF;
a calculation module, configured to calculate a shortest distance from the UE node to each TNGF node according to the first location information and the second location information;
the sorting module is used for sorting all the shortest distances to obtain a target distance list;
the selecting module is used for selecting one TNGF node from the target distance list as a TNGF node to be compared;
a second obtaining module, configured to obtain, from the AMF, first slice data of the TNGF node to be compared and second slice data of the UE node;
and the comparison module is used for performing non-trusted 3GPP access by taking the network element of the TNGF node to be compared as a target TNGF network element when the first slice data is the same as the second slice data.
In another aspect, an embodiment of the present invention provides a system for selecting a TNGF network element based on a 5G core network, including:
at least one memory for storing a program;
at least one processor configured to load the program to perform the method for selecting the TNGF network element based on the 5G core network.
In another aspect, an embodiment of the present invention provides a storage medium, where a computer-executable program is stored, and when the computer-executable program is executed by a processor, the computer-executable program is configured to implement the method for selecting a TNGF network element based on a 5G core network.
The method for selecting the TNGF network element based on the 5G core network provided by the embodiment of the invention has the following beneficial effects:
in this embodiment, after the shortest distances between the location information of the UE node and the location information of the TNGF nodes are calculated, all the shortest distances are sorted, one of the TNGF nodes is selected as a to-be-compared TNGF node, then a relationship between slice data of the to-be-compared TNGF node and slice data of the UE node is compared, and when the two are the same, a network element of the to-be-compared TNGF node is used as a target TNGF network element for non-trusted 3GPP access, so that the currently selected TNGF network element can support a slice required by the UE, and the accuracy of a connection process between the terminal and the 5G core network is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
fig. 1 is a flowchart of a method for selecting a TNGF network element based on a 5G core network according to an embodiment of the present invention;
FIG. 2 is a directed topology diagram according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an optimal selection of TNGF nodes according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly defined, terms such as set, etc. should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Before proceeding with the description of the specific embodiments, the terms of art to which the present embodiments relate are explained:
5GC: the 5G core network is the core of the 5G mobile network. It establishes a reliable, secure network connection for the end user and provides access to its services. The core domain handles various basic functions in the mobile network, such as connectivity and mobility management, authentication and authorization, user data management and policy management, etc. The 5G core network functions are completely software-based and designed to be cloud-native, which means that they are independent of the underlying cloud infrastructure, enabling greater deployment agility and flexibility.
AMF: the network element is called Access and Mobility Management Function in English, and Chinese is interpreted as an Access and Mobility Management Function network element, and the functions of the network element comprise connection Management, accessibility Management, mobility Management, access authorization and the like.
3GPP: english is interpreted as 3rd Generation Partnership Project, third Generation Partnership Project. The 3GPP aims to realize smooth transition from a 2G network to a 3G network, ensure backward compatibility of future technologies, and support easy network establishment and roaming and compatibility between systems. Its function is to make the third generation of technical specification based on the GSM core network and UTRA as the radio interface. The UTRA is a specification of using FDD as W-CDMA technology and TDD as TD-SCDMA technology.
non-3GPP: the new terminal access method proposed in non-3GPP access, 5G, is different from the general access method through the base station.
TNGF: the English interpretation is Trusted Non-3GPP Gateway Function, which is primarily responsible for Trusted Non-3GPP access.
UE: english is interpreted as User Equipment and Chinese is interpreted as User Equipment. The user device may be a cell phone, tablet, laptop, or other device.
TNAN: english is interpreted as Trusted non-3GPP Access Network.
S-NSSAI: the English interpretation is Single Network Slice Selection Assistance Information, slice data.
With the rapid development of communication technology, the communication network technology of 5GC is continuously developed and innovated, the service coverage area of 5GC is gradually enlarged, the number of users is increasing, especially in recent years, the convergence of 4G and 5G develops, more and more users select 5G communication services, and there are multiple ways to access the 5G core network, including 3GPP access and non-3GPP access. For a non-3GPP access registration 5G core network which is trusted, when the TNGF originally selected can not support the slice required by the UE, the AMF is allowed to trigger the TNGF relocation, and a different TNGF is reselected to serve the UE. However, the prior art cannot determine which TNGF to select from among a plurality of TNGF to serve a UE. However, the TNGF network element mainly functions to enable the terminal to access the 5G core network from the trusted non-3GPP network, and if the selection of the TNGF cannot be determined, the terminal cannot access the non-3GPP network through the trust.
Based on this, an embodiment of the present invention provides a method for selecting a TNGF network element based on a 5G core network, which is used to provide an optimal selection for determining TNGF for AMF by calculating a shortest distance between a UE node and a TNGF node and comparing slice information supported by TNGF with slice information provided by UE when the originally selected TNGF cannot support slices required by UE.
Specifically, as shown in fig. 1, an embodiment of the present invention provides a method for selecting a TNGF network element based on a 5G core network, including but not limited to the following steps:
step S110, when the AMF triggers the TNGF network element relocation, first position information of the UE node and second position information of the TNGF node and the TNGF node, which are acquired by the AMF, are acquired.
Step S120, calculating the shortest distance from the UE node to each TNGF node according to the first position information and the second position information;
s130, sequencing all the shortest distances to obtain a target distance list;
step S140, selecting a TNGF node from the target distance list as a TNGF node to be compared;
step S150, acquiring first slice data of the TNGF node to be compared and second slice data of the UE node from the AMF;
and step S160, when the first sliced data is the same as the second sliced data, taking the network element of the TNGF node to be compared as a target TNGF network element to perform non-trusted 3GPP access.
In this embodiment, after the location information of the UE node and the location information of the TNGF node are obtained, the location information of the AMF is simultaneously obtained as third location information, and a directed topology graph is constructed according to the first location information, the second location information, and the third location information. Exemplarily, taking the directed topology map as an example in fig. 2, the node includes an AMF node as a point a, 4 TNGF nodes as B point, C point, D point and E point, respectively, and a UE node as F point. Then, as shown in formula (1) and formula (2), the initialization assignment is performed on the TNGF node and the UE node of the topology map based on the location information data of the AMF and the TNGF:
UE = [ F (x 5, y 5) ] formula (2)
Then based on the data after the assignment, calculating the shortest distance between the UE node and each TNGF node by a formula (3), wherein the shortest distances between all TNGF nodes and the UE node form a distance sequence to be sequenced:
and then sorting the shortest distances in the distance sequence to be sorted to obtain a target distance list. The sorting process may be sorting all the shortest distances in a descending manner to obtain a target distance list. After the ordering is completed, the TNGF node in the first position may be ordered from the target distance list as the TNGF node to be compared, that is, the TNGF node closest to the UE node is selected as the TNGF node to be compared. And then, acquiring slice data (S-NSSAI) of the TNGF node to be compared as first slice data, acquiring slice data of the UE node as second slice data, comparing whether the contents of the first slice data and the second slice data are the same, and if so, taking the TNGF node to be compared as a target TNGF network element to perform non-trusted 3GPP access. And if the first section data is different from the second section data, selecting a first TNGF node in sequence from the rest TNGF nodes as a TNGF node to be compared, and repeating the relation of comparing the section data for the TNGF node to be compared until the optimal TNGF node is selected.
Specifically, as shown in fig. 3, when the network element of the to-be-compared TNGF node is used as a target TNGF network element for non-trusted 3GPP access, the method includes, but is not limited to, the following steps:
the UE node is registered through the trusted non-3GPP access, when the network element of the TNGF-1 of the original TNGF node cannot support the slicing of the UE node, the AMF triggers the TNGF node to reposition, and the optimal TNGF-2 network element of the TNGF node is determined to be used as a target TNGF network element through a shortest distance algorithm module;
the method comprises the steps that a request for setting an initial context is sent through a target TNGF network element, the IP address of the target TNGF network element is sent to an original TNGF network element, when the original TNGF network element receives a request message, the IP address of another TNGF contained in the TNGF address is identified, and the AMF request TNGF relocation is determined;
the original TNGF network element forwards the received IP address of the target TNGF network element to the UE node through the target TNGF network element, and the TNGF address sent to the UE node is the IP address of the target TNGF network element provided by the AMF. If the SSID is supported by a non-3gpp access network (such as a WLAN access network), the UE node does not switch to other SSIDs after receiving the message;
the UE node sends an EAP-Response/ 5G-Notification message to the original TNGF network element;
the original TNGF network element sends a message containing an EAP-Success message to the AMF;
and the UE node establishes a safe NWt connection with the target TNGF network element.
In some embodiments, after the shortest distance between each TNGF node and a UE node is obtained, the shortest distance, the first location information, the second location information, and the third location information are displayed in the directed topology map, so that how to select and which TNGF to pass through by a terminal under trusted non-3GPP access can be monitored more intuitively, and data multiplexing is facilitated.
The embodiment of the invention provides a system for selecting a TNGF network element based on a 5G core network, which comprises the following steps:
a first obtaining module, configured to obtain, when the AMF triggers a TNGF network element relocation, first location information of a UE node and the UE node and second location information of the TNGF node and the TNGF node, which are acquired by the AMF;
a calculation module, configured to calculate a shortest distance from the UE node to each TNGF node according to the first location information and the second location information;
the sorting module is used for sorting all the shortest distances to obtain a target distance list;
the selecting module is used for selecting one TNGF node from the target distance list as a TNGF node to be compared;
a second obtaining module, configured to obtain, from the AMF, first slice data of the TNGF node to be compared and second slice data of the UE node;
and the comparison module is used for performing non-trusted 3GPP access by taking the network element of the TNGF node to be compared as a target TNGF network element when the first slice data is the same as the second slice data.
The contents of the embodiment of the method of the invention are all applicable to the embodiment of the system, the functions specifically realized by the embodiment of the system are the same as those of the embodiment of the method, and the beneficial effects achieved by the embodiment of the system are also the same as those achieved by the method.
The embodiment of the invention provides a system for selecting a TNGF network element based on a 5G core network, which comprises the following steps:
at least one memory for storing a program;
at least one processor configured to load the program to perform the method for selecting the TNGF network element based on the 5G core network shown in fig. 1.
The contents of the embodiment of the method of the invention are all applicable to the embodiment of the system, the functions specifically realized by the embodiment of the system are the same as those of the embodiment of the method, and the beneficial effects achieved by the embodiment of the system are also the same as those achieved by the method.
An embodiment of the present invention provides a storage medium, in which a computer-executable program is stored, and the computer-executable program is executed by a processor to implement the method for selecting a TNGF network element based on a 5G core network shown in fig. 1.
The contents of the method embodiment of the present invention are all applicable to the embodiment of the storage medium, the functions specifically implemented by the embodiment of the storage medium are the same as those of the method embodiment, and the beneficial effects achieved by the embodiment of the storage medium are also the same as those achieved by the method.
Embodiments of the present application also disclose a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The computer instructions may be read by a processor of a computer device from a computer-readable storage medium, and the computer instructions executed by the processor cause the computer device to execute the method for selecting the TNGF network elements based on the 5G core network shown in fig. 1.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A method for selecting a TNGF network element based on a 5G core network is characterized by comprising the following steps:
when the AMF triggers the relocation of the TNGF network element, acquiring UE nodes and first position information of the UE nodes and second position information of the TNGF nodes and the TNGF nodes, which are acquired by the AMF;
calculating the shortest distance from the UE node to each TNGF node according to the first position information and the second position information;
sequencing all the shortest distances to obtain a target distance list;
selecting a TNGF node from the target distance list as a TNGF node to be compared;
acquiring first slice data of the TNGF node to be compared and second slice data of the UE node from the AMF;
and when the first slice data is the same as the second slice data, taking the network element of the TNGF node to be compared as a target TNGF network element to perform non-trusted 3GPP access.
2. The method according to claim 1, wherein the sorting all the shortest distances to obtain a target distance list comprises:
and sequencing all the shortest distances in a descending manner to obtain a target distance list.
3. The method of claim 2, wherein the selecting a TNGF node from the target distance list as the TNGF node to be compared includes:
and selecting the first TNGF node in the sequence from the target distance list as the TNGF node to be compared.
4. The method for selecting the TNGF network element based on the 5G core network according to claim 3, wherein the method further comprises the following steps:
and when the first section data is different from the second section data, selecting a first TNGF node in the sequence from the rest TNGF nodes as a TNGF node to be compared.
5. The method according to claim 1, wherein the performing non-trusted 3GPP access with the to-be-compared TNGF node network element as a target TNGF network element comprises:
taking the network element of the TNGF node to be compared as a target TNGF network element;
sending an initial context setting request through the target TNGF network element, and sending the IP address of the target TNGF network element to the current TNGF network element so that the current TNGF network element sends the IP address to the UE node;
and the UE node sends an EAP-Response/5G-Notification message to the current TNGF network element, and after the current TNGF network element sends a message containing the EAP-Success message to the AMF, the UE node establishes NWt connection with the target TNGF network element.
6. The method for selecting a TNGF network element based on a 5G core network of claim 1, wherein after the step of obtaining the AMF-collected first location information of the UE node and the UE node, and the second location information of the TNGF node and the TNGF node, the method further comprises the steps of:
acquiring third position information of the AMF;
and constructing a directed topological graph according to the first position information, the second position information and the third position information.
7. The method for selecting a TNGF network element based on a 5G core network as claimed in claim 6, wherein after the step of calculating the shortest distance from the UE node to each of the TNGF nodes according to the first location information and the second location information, the method further comprises the steps of:
and displaying the shortest distance, the first position information, the second position information and the third position information by the directed topological graph.
8. A system for selecting TNGF network elements based on a 5G core network, comprising:
a first obtaining module, configured to obtain, when the AMF triggers a TNGF network element relocation, first location information of a UE node and the UE node and second location information of the TNGF node and the TNGF node, which are acquired by the AMF;
a calculation module, configured to calculate a shortest distance from the UE node to each TNGF node according to the first location information and the second location information;
the sorting module is used for sorting all the shortest distances to obtain a target distance list;
the selecting module is used for selecting one TNGF node from the target distance list as a TNGF node to be compared;
a second obtaining module, configured to obtain, from the AMF, first slice data of the TNGF node to be compared and second slice data of the UE node;
and the comparison module is used for performing non-trusted 3GPP access by taking the network element of the TNGF node to be compared as a target TNGF network element when the first slice data is the same as the second slice data.
9. A system for selecting a TNGF network element based on a 5G core network, comprising:
at least one memory for storing a program;
at least one processor configured to load the program to perform the method for selecting TNGF network elements based on a 5G core network according to any one of claims 1 to 7.
10. A storage medium having stored therein a computer-executable program which, when executed by a processor, is adapted to implement a method for selecting TNGF network elements based on a 5G core network as claimed in any one of claims 1 to 7.
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| CN107979860A (en) * | 2016-10-25 | 2018-05-01 | 华为技术有限公司 | Support user plane functions entity selection method, equipment and the system of non-3GPP accesses |
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