KR102237379B1 - Apparatus and method for routing in communication system - Google Patents

Abstract

An exemplary embodiment of the present invention relates to an apparatus and method for routing in a communication system capable of normally routing each communication device without manually inputting target device information to each communication device when a failure occurs in a target information server such as a network repository function (NRF) providing target device information in a communication system. According to one aspect of the present invention, the method for routing in the communication device, which receives device information of a corresponding target device from a target information server and routes the device information when the routing is required, may comprise the steps of: (a) periodically requesting a device information list of one or more target devices to the target information server and obtaining the device information list; (b) storing or updating the obtained device information list of the target devices; and (c) routing the corresponding target devices based on the device information list of the target devices stored in step (a) when a failure occurs in the target information server when the routing is required.

Description

Apparatus and method for routing in communication system

The present invention relates to an apparatus and method for routing in a communication system, and more particularly, in the case of a failure in a Network Repository Function (NRF) in a 5G SA (Stand Alone) communication system, each communication equipment can be routed normally. It relates to an apparatus and a method for making it possible.

In general, in 5G, compared to the existing mobile communication network system, there are more types of network communication equipment (or equipment abbreviated), and one equipment can provide multiple services, and equipment creation/deletion can be performed dynamically. As there is, the interworking between equipment becomes more complicated.

In each device of the existing mobile communication network system, target device information (e.g., IP, port information) that needs to be interlocked is input to the device in advance. This may be intuitive in an environment where the number of devices is not large, but 5G In the environment, it can be a factor that complicates operations.

For this purpose, the 5G standard (TS 23.501) has defined a new node called Network Repository Function (NRF), and each device delivers the name of the target device to which it wants to interlock to the NRF. port) list. In other words, unlike the existing mobile communication network system, the 5G device does not need to input target device information (IP, port) that needs to be interworked to the device in advance.

However, if the NRF fails and it is impossible to provide normal information, there is a practical problem in that the settings must be put in advance, just like the existing mobile communication network system, as it still has no choice but to operate by referring to the target device information manually input to each device. .

Unexamined Patent Publication No. 10-2019-0060667 (2019.06.03.)

The present invention is to solve the above-described conventional problem, and its object is to provide target device information to each communication device when a failure occurs in a target information server such as a Network Repository Function (NRF) that provides information on the target device in a communication system. It is to provide an apparatus and method for routing in a communication system so that each communication equipment can route normally without manually inputting each.

In order to achieve the above object, an apparatus for routing in a communication system according to an aspect of the present invention is a communication device for receiving and routing equipment information of a target device from a target information server when routing is required, wherein the communication device An apparatus for routing in a communication system provided in, comprising: an information acquisition unit for periodically or aperiodically requesting and acquiring a list of equipment information of one or more target devices from the target information server; An information storage unit for storing or updating the acquired equipment information list of the target equipment; And a routing unit configured to perform routing to the target device based on the device information list of the target device stored in the information storage unit when a failure occurs in the target information server when routing is required.

In order to achieve the above object, a method for routing in a communication system according to another aspect of the present invention is a communication device for receiving and routing equipment information of a target device from a target information server when routing is required, wherein the communication device A method for routing in a communication system performed in, comprising: (a) periodically requesting and obtaining a list of equipment information of one or more target devices from the target information server; (b) storing or updating the obtained equipment information list of the target equipment; And (c) performing routing to the target device based on the device information list of the target device stored in step (a) when a failure occurs in the target information server when routing is required.

The device information may include IP address and port information, the target information server may include a Network Repository Function (NRF), the communication device may include an Access and Mobility Management Function (AMF), and the target device It may include User Data Management (UDM).

In order to achieve the above object, according to another aspect of the present invention, it is possible to provide a computer-readable recording medium in which a program for executing the routing method in the communication system in a computer is recorded.

In order to achieve the above object, according to another aspect of the present invention, it is possible to provide an application stored in a computer-readable recording medium in order to execute the method for routing in the communication system in combination with hardware.

In order to achieve the above object, according to another aspect of the present invention, a computer program stored in a computer-readable recording medium can be provided in order to execute the method for routing in the communication system on a computer.

As described above, according to various aspects of the present invention, since target device information of each communication device is periodically acquired and stored/updated by the communication device, a Network Repository Function (NRF) in a 5G SA (Stand Alone) communication system. In the event of a failure in each communication device, there is an effect that each communication device can route normally based on the real-time stored/updated target device information without manually manually inputting the target device information to each communication device.

1 is a block diagram of an exemplary communication system to which the present invention can be applied;
2 is a block diagram of an apparatus for routing in case of an NRF failure in a 5G communication system according to an exemplary embodiment of the present invention;
3 is a flowchart of a method for routing in case of an NRF failure in a 5G communication system according to an exemplary embodiment of the present invention;
4 is a flow chart for explaining a routing process according to the 5G standard in the communication system as shown in FIG. 1;
5 is a flowchart illustrating a routing process according to a conventional method when an NRF failure occurs in the communication system as shown in FIG. 1;
6 is a flowchart illustrating a routing process according to the method of the present invention of FIG. 2-3 when an NRF failure occurs in the communication system of FIG. 1.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to elements of each drawing, the same elements are to have the same numerals as possible, even if they are indicated on different drawings. In addition, when it is determined that a detailed description of a known configuration or function related to the description of an embodiment of the present invention may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a block diagram of an exemplary communication system to which the present invention can be applied, as shown in the drawing, a communication network 1, a communication equipment 2, a target information server 3, a target equipment 4, and It may include a terminal 5.

The communication network (1) is a single or complex connection between the communication equipment (2), the target information server (3), the target equipment (4), and the terminal (5) by wired, wireless and/or Internet, etc. In the embodiment of the present invention, a 5G SA (Stand Alone) communication network will be described as an example.

The communication device 2 receives and routes the device information (eg, IP address and port information) of the target device 4 from the target information server 3 when the message uploaded from the terminal 5 needs to be routed. This indicates a communication device for, and may include, for example, an Access and Mobility Management Function (AMF) of a 5G communication network.

The target information server 3 builds the routing information for each terminal 5, that is, equipment information (eg, IP address and port information, etc.) of the target equipment 4 as a database. Represents a server device to be provided upon request, and may include, for example, a network repository function (NRF) of a 5G communication network.

The target device 4 may include, for example, UDM (User Data Management) of a 5G communication network.

The terminal 5 represents a communication terminal device owned by a user, for example, a mobile communication terminal capable of voice communication, data communication, and Internet communication, a PDA, a smart phone, a tablet PC, a notebook PC, and a personal computer. (PC) and the like may be included.

2 is a block diagram of an apparatus 20 for routing in case of an NRF failure in a 5G communication system according to an exemplary embodiment of the present invention. ) Will be described as an example.

The apparatus 20 for routing in case of an NRF failure in a 5G communication system according to an exemplary embodiment of the present invention, as shown in FIG. 2, includes an information acquisition unit 21, an information storage unit 23, and routing. It may include a part (25).

The information acquisition unit 21 is an equipment including IP address and port information of the target device 4 as the routing information based on the subscriber number information of the terminal 5 when routing for a message uploaded from the terminal 5 is required. Information is obtained by requesting from the target information server 3, but according to this embodiment, the device information list of one or more target devices 4 is continuously (periodic or aperiodic) to the target information server 3 regardless of whether routing is necessary or not. ) Can be obtained in advance by requesting.

As an example, the information acquisition unit 21 may obtain a list of equipment information of one or more UDMs 4 divided by subscriber number band units and installed periodically or aperiodically to the NRF 3 regardless of whether routing is necessary or not. have.

Typically, when the AMF (2) receives a registration (REGISTRATION) request message from the terminal (5), the message must be routed to the UDM (4) where the corresponding subscriber information exists, and the UDM (4) is a subscriber number band unit. If the equipment is divided into one or more equipment, for example, the subscriber number band of 450060108080xxxx is UDM#0, the subscriber number band of 450060108081xxxx is UDM#1, and the subscriber number band of 450060108082xxxx is divided into UDM#2, etc. , The information acquisition unit 21 may periodically or aperiodically obtain equipment information of all UDMs 4 including UDM#0, UDM#1, and UDM#2 by requesting from the NRF3.

The information storage unit 23 stores the equipment information of the UDM 4 acquired through the information acquisition unit 21 or updates and stores information already stored.

When a registration request message is received from the terminal 5, the routing unit 25 is for routing the message to the UDM 4 where the subscriber information exists. In particular, a failure occurs in the NRF 3 when routing is required. If so, routing to the corresponding UDM 4 may be performed based on the list of equipment information (IP address and port information) of the UDM 4 stored in the information storage unit 23.

For example, when a registration request message is received from the terminal 5 of the subscriber number 450061080802780, the routing unit 25 of the AMF 2 may route the message to the UDM#0(4).

3 is a flow chart of a method for routing in case of an NRF failure in a 5G communication system according to an exemplary embodiment of the present invention. NRF(3) failure in a 5G communication system performed by the AMF 2 of FIG. 1-2 A method for city routing will be described as an example.

First, the AMF (2) periodically or aperiodically requests the equipment information of all the UDM (4) (for example, IP address and port number, etc.) to the NRF (3) according to a preset appointment (S301), step UDM equipment information provided from the NRF 3 is received at the request of S301 (S303), and the UDM equipment information received in step S303 is stored or updated and stored (S305), and the processes of steps S301 to S305 are described above. Repeatedly or aperiodically according to the set appointment.

Subsequently, when a registration request message is received from the terminal 5, the AMF 2 determines that routing of the registration request message to the UDM 4 is necessary (S307), and if it is determined that routing is necessary in step S307, the NRF ( 3) It determines whether there is a failure, for example, equipment information for the corresponding routing to the NRF 3 based on the subscriber number information of the terminal 5 (eg, IP address and port number information of the corresponding UDM) After requesting for, if there is no response to this request, it may be determined that a failure has occurred in the NRF 3 (S309).

Subsequently, the AMF (2) performs routing in the same manner as the existing process (see S403-S407 in Fig. 4) if there is no failure in the NRF (3) as a result of the determination in step S309 (S311), and if there is a failure in the NRF (3) If it is determined that there is, based on the UDM equipment information stored in step S305, equipment information for the corresponding routing corresponding to the subscriber number information (for example, 450061080802780) of the terminal 5 (for example, IP address and port number information of UDM#0) is provided. Search and perform routing, that is, to transmit (route) the registration request message of the terminal 5 to the corresponding UDM #0 (4) (S313).

4 is a flowchart illustrating a typical routing process of a terminal registration request message according to the 5G standard in the communication system of FIG. 1.

The plurality of UDMs(4) is based on the assumption that the equipment is divided by the subscriber number band unit.For example, the subscriber number band '450060108080xxxx' is UDM#0, '450060108081xxxx' is UDM#1, and '450060108082xxxx' is UDM. Assume that it is separated by #2.

First, when the AMF (2) receives a registration request message from the terminal 5 of the subscriber number '450061080802780' (S401), the UDM interlocking information of the subscriber number band '45006108080xxxx' (i.e., UDM Equipment information) is requested (S403).

Subsequently, the NRF 3 transmits IP address information (eg, IP: 10.10.10.10) and port information (eg, Port: 5000) as equipment information of UDM#0 to the AMF 2 (S405). ).

Finally, the AMF (2) transmits a registration request message to the terminal 5 of the subscriber number '450061080802780' to the UDM (4) of UDM#0 based on the UDM equipment information received from the NRF (3). Routing is finished (S407).

5 is a flowchart illustrating a routing process of a terminal registration request message according to a conventional method when an NRF failure occurs in the communication system of FIG. 1.

As in the example of FIG. 4, the plurality of UDMs 4 assume that the equipment is divided by the subscriber number band unit, for example, the subscriber number band '450060108080xxxx' is UDM#0, and '450060108081xxxx' is UDM# 1, it is assumed that '450060108082xxxx' is classified as UDM#2.

When a failure occurs in the NRF(5), conventionally, the operator must manually input target equipment information corresponding to the subscriber number band into the AMF(2) in advance, for example, the subscriber number band '450060108080xxxx'. Is'UDM#0(10.10.10.10, 5000)', '450060108081xxxx' is'UDM#1(10.10.10.11, 5000)', '450060108082xxxx' is'UDM#2(10.10.10.12, 5000)', etc. Do (S501).

When the AMF (2) receives a registration request message from the terminal 5 of the subscriber number '450061080802780' (S503), the UDM interlocking information of the subscriber number band '45006108080xxxx' to the NRF (3) (i.e., UDM equipment information ) Is requested (S503).

The AMF 2 recognizes the failure of the NRF 3 (S507), and refers to the target device information manually input in step S501, that is, UDM device information (S509), to the terminal 5 of the subscriber number '450061080802780'. Routing is completed by transmitting a registration request message for the UDM #0 to the UDM (4) (S511).

6 is a flowchart illustrating a routing process of a terminal registration request message according to the method of the present invention of FIG. 2-3 when an NRF failure occurs in the communication system of FIG. 1.

As in the above example, the plurality of UDMs 4 is based on the assumption that the equipment is divided by the subscriber number band unit, for example, the subscriber number band '450060108080xxxx' is UDM#0, and '450060108081xxxx' is UDM#1. , It is assumed that '450060108082xxxx' is identified as UDM#2.

First, the AMF (2) periodically or aperiodically requests the equipment information (IP address and port number) of all UDM (4) to the NRF (3) according to a preset appointment (S601), and the NRF (3) is a step In response to the request of S601, equipment information (IP address and port number) of UDM 4 corresponding to all subscriber bands is transmitted to AMF 2, for example, the subscriber number band '450060108080xxxx' is'UDM#'. 0(10.10.10.10, 5000)', '450060108081xxxx' is'UDM#1(10.10.10.11, 5000)', '450060108082xxxx' is'UDM#2(10.10.10.12, 5000)'. Equipment information is provided (S603).

Subsequently, the AMF (2) receives and stores or updates the UDM equipment information provided from the NRF (3) in step S603 (S605), and performs periodic or aperiodic processes according to a preset appointment. Repeatedly performed (S607).

When the AMF (2) receives a registration request message from the terminal 5 of the subscriber number '450061080802780' (S611), the UDM interlocking information of the subscriber number band '45006108080xxxx' to the NRF (3) (i.e., UDM equipment information ) Is requested (S613).

Finally, if there is no response from the NRF (3) to step S613, the AMF (2) recognizes the failure of the NRF (3) (S615), and refers to the target equipment information, that is, UDM equipment information stored in step S605 ( S617), a registration request message for the terminal 5 of the subscriber number '450061080802780' is transmitted to the UDM 4 of UDM#0 to complete the routing (S619).

Meanwhile, according to the method for routing (of the terminal registration request message) in case of an NRF failure in the 5G communication system of the present invention described above, a computer-readable recording medium recording a program for executing the method in a computer can be implemented. .

On the other hand, according to the method for routing (of the terminal registration request message) in case of an NRF failure in the 5G communication system of the present invention, an application stored in a computer-readable recording medium is used to execute the method in combination with hardware. Can be implemented.

On the other hand, according to the method for routing (of a terminal registration request message) in case of an NRF failure in the 5G communication system of the present invention described above, a computer program stored in a computer-readable recording medium is used to execute the method in a computer. Can be implemented.

For example, as described above, a method for routing (of a terminal registration request message) in case of an NRF failure in a 5G communication system according to an exemplary embodiment of the present invention provides program instructions for performing operations implemented by various computers. It may be implemented as a computer-readable recording medium including or an application stored in such a recording medium. The computer-readable recording medium may include a program command, a local data file, a local data structure, or the like alone or in combination. The recording medium may be specially designed and configured for the embodiment of the present invention, or may be known to and usable by a person skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magnetic-optical media such as floppy disks, and ROM, RAM, flash memory, and the like. Hardware devices specially configured to store and execute the same program instructions are included. Examples of the program instructions may include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1: communication network
2: Communication equipment (AMF: Access and Mobility Management Function)
3: Target Information Server (NRF: Network Repository Function)
4: Target equipment (UDM: User Data Management)
20: routing device
21: Information Acquisition Department
23: information storage unit
25: routing unit

Claims (13)

A communication device for routing by receiving device information of a target device from a target information server when routing is required, comprising: a device for routing in a communication system provided in the communication device,
An information acquisition unit for periodically or aperiodically requesting and obtaining a list of equipment information of one or more target devices from the target information server;
An information storage unit for storing or updating the acquired equipment information list of the target equipment; And
Including; a routing unit for performing routing to the target device based on the device information list of the target device stored in the information storage unit when a failure occurs in the target information server when routing is required, and
The target information server includes a Network Repository Function (NRF), and the communication device includes an Access and Mobility Management Function (AMF). The method of claim 1,
The device information includes IP address and port information. delete delete The method of claim 1,
The device for routing in a communication system, characterized in that the target device includes UDM (User Data Management). In a communication device for routing by receiving device information of a target device from a target information server when routing is required, as a method for routing in a communication system performed by the communication device,
(a) periodically requesting and obtaining a list of equipment information of one or more target equipment from the target information server;
(b) storing or updating the obtained equipment information list of the target equipment; And
(c) if a failure occurs in the target information server when routing is necessary, performing routing to the target device based on the device information list of the target device stored in step (a); and
The target information server includes a Network Repository Function (NRF), and the communication device includes an Access and Mobility Management Function (AMF). The method of claim 6,
The device information includes IP address and port information. delete delete The method of claim 6,
The method for routing in a communication system, characterized in that the target device includes UDM (User Data Management). A computer-readable recording medium storing a program for executing the method for routing in the communication system according to any one of claims 6, 7 and 10 on a computer. An application stored in a computer-readable recording medium to execute the method for routing in the communication system according to any one of claims 6, 7 and 10 in combination with hardware. A computer program stored in a computer-readable recording medium in order to execute the method for routing in the communication system according to any one of claims 6, 7 and 10 on a computer.

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