KR102065019B1 - Home subscriber server and method for managing subscriber in internet protocol multimedia subsystem network - Google Patents

Abstract

The subscriber information management server for managing subscribers in an Internet Protocol Multimedia Subsystem (IMS) network includes an input unit for receiving information of a failed system among a plurality of systems included in the IMS network, and a subscriber information previously stored in the subscriber information management server. A subscriber extracting unit for extracting a subscriber registered in the system where the failure occurs, a message generating unit for generating a re-registration request message for the IMS network, and the re-registration request message to a connection management device associated with the extracted subscriber; It includes a transmission unit for transmitting.

Description

Subscriber information management server and method for managing subscriber in IMS network {HOME SUBSCRIBER SERVER AND METHOD FOR MANAGING SUBSCRIBER IN INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM NETWORK}

The present invention relates to a subscriber information management server and method for managing subscribers in an IMS network.

The 3rd Generation Partnership Project (3GPP) has emerged as a new standard for creating, transmitting and playing multimedia over high-speed wireless networks. The Internet Protocol Multimedia Subsystem (IMS) proposed in the 3GPP standard refers to a system for providing an IP-based multimedia service.

IMS service refers to simultaneously providing various types of packet services based on the underlying IP transport protocol to mobile subscribers. IMS service can provide various types of packet-based services based on IP transmission protocol to mobile subscribers at the same time. In addition to real-time services such as voice and video, mobile subscribers can use file transfer, e-mail, This means that a non-real-time service such as a short message can be used at the same time, or a new service using such a service can be used.

In this regard, Korean Patent Publication No. 2016-0013702, which is a prior art, discloses an electronic device and a method of providing an IMS service of the electronic device.

If a failure occurs in a system included in the IMS network that provides such IMS service, the first one call fails in the IMS network, or the failure of the IMS network fails due to the pre-backup of recovery information for the failed system. As a result, subscribers are inevitably affected by IMS network failures. In addition, when a failure occurs in another system included in the IMS network other than the CSCF, there is a disadvantage that there is no method for recovering it.

If a failure occurs in the IMS network, the subscriber information of the subscriber information management server (HSS) is used to extract the affected subscriber from the failure, and the registered subscriber is re-registered in the IMS network to minimize the service impact that may occur to the subscriber. The present invention provides a subscriber information management server and method for managing subscribers in an IMS network. Conventionally, when a failure occurs in the S-CSCF included in the IMS network, the subscriber information management server recovers the state of the subscriber by using the recovery information of the S-CSCF previously backed up by the subscriber information management server (HSS). -The subscriber's state could be restored depending on the backup of the recovery information of the CSCF, but the subscriber information management server manages the subscriber in the IMS network to resolve the recovery failure of the IMS network due to the absence of the recovery information of the S-CSCF. To provide a subscriber information management server and method. Conventionally, when a failure occurs in the P-CSCF included in the IMS network, the first incoming call must be failed to recover the P-CSCF, but after the first failed failed call, the subscriber must be connected before performing recovery for the P-CSCF. It is an object of the present invention to provide a subscriber information management server and method for managing subscribers in an IMS network that can recover a callable state. In addition to CSCF, the present invention provides a subscriber information management server and method for managing subscribers in an IMS network that can recover a callable state even when a failure occurs in an IP-SM-GW-based system. However, the technical problem to be achieved by the present embodiment is not limited to the technical problems as described above, and other technical problems may exist.

As a means for achieving the above-described technical problem, an embodiment of the present invention, the input unit for receiving the information of the failure system among the plurality of systems included in the IMS network, the subscriber information previously stored in the subscriber information management server A subscriber extracting unit for extracting a subscriber registered in the system where the failure occurs, a message generating unit for generating a re-registration request message for the IMS network, and the re-registration request message to a connection management device associated with the extracted subscriber; It is possible to provide a subscriber information management server including a transmitting unit for transmitting.

Another embodiment of the present invention, the step of receiving the information of the failure system among a plurality of systems included in the IMS network, the subscriber registered in the system where the failure occurs based on the subscriber information previously stored in the subscriber information management server Extracting the data, generating a re-registration request message for the IMS network, and transmitting the re-registration request message to the connection management device associated with the extracted subscriber.

According to another embodiment of the present invention, when the computer program is executed by a computing device, the system receives the information of a system in which a failure occurs among a plurality of systems included in the IMS network, and the system in which the failure occurs based on previously stored subscriber information. A computer stored in a medium including a sequence of instructions for extracting a subscriber registered with the client, generating a re-registration request message for the IMS network, and sending the re-registration request message to a connection management device associated with the extracted subscriber; Program can be provided.

The above-mentioned means for solving the problems are merely exemplary, and should not be construed to limit the present invention. In addition to the exemplary embodiments described above, there may be additional embodiments described in the drawings and detailed description of the invention.

According to any one of the above-described problem solving means of the present invention, when a failure occurs in the IMS network, by using the subscriber information of the subscriber information management server (HSS) to extract the subscriber affected by the failure, the extracted subscriber to the IMS network There is provided a subscriber information management server and method for managing subscribers in an IMS network that can minimize the impact of services that may occur to subscribers by re-registering. Conventionally, when a failure occurs in the S-CSCF included in the IMS network, the subscriber information management server recovers the state of the subscriber by using the recovery information of the S-CSCF previously backed up by the subscriber information management server (HSS). -The subscriber's state could be restored depending on the backup of the recovery information of the CSCF, but the subscriber information management server manages the subscriber in the IMS network to resolve the recovery failure of the IMS network due to the absence of the recovery information of the S-CSCF. A subscriber information management server and method can be provided. Conventionally, when a failure occurs in the P-CSCF included in the IMS network, the first incoming call must be failed to recover the P-CSCF, but after the first failed failed call, the subscriber must be connected before performing recovery for the P-CSCF. A subscriber information management server and method for managing subscribers in an IMS network capable of restoring to a callable state can be provided. In addition to CSCF, it is possible to provide a subscriber information management server and method for managing subscribers in an IMS network that can recover a callable state even when a failure occurs in an IP-SM-GW based system.

1A to 1C are flowcharts illustrating a process of recovering a failure occurring in a conventional IMS network.
2 is a block diagram of a subscriber management system according to an embodiment of the present invention.
3 is a block diagram of a subscriber information management server according to an embodiment of the present invention.
4 is a flowchart illustrating a method of managing a subscriber in an IMS network in a subscriber information management server according to an embodiment of the present invention.
5 is a flowchart illustrating a method for managing a subscriber according to a system in which a failure occurs in a subscriber information management server according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is "connected" to another part, this includes not only "directly connected" but also "electrically connected" with another element in between. . In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components, unless specifically stated otherwise, one or more other features It is to be understood that the present disclosure does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

In the present specification, the term 'unit' includes a unit realized by hardware, a unit realized by software, and a unit realized by both. In addition, one unit may be realized using two or more pieces of hardware, and two or more units may be realized by one piece of hardware.

Some of the operations or functions described as being performed by a terminal or a device in the present specification may instead be performed in a server connected to the terminal or device. Similarly, some of the operations or functions described as being performed by the server may be performed by a terminal or a device connected to the server.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1A to 1C are flowcharts illustrating a process of recovering a failure occurring in a conventional IMS network. 1A and 1B are flowcharts illustrating a process of recovering a failure when a failure occurs in an S-CSCF among a plurality of systems included in a conventional IMS network, and FIG. 1C illustrates a plurality of systems included in a conventional IMS network. An operation flowchart illustrating a process of recovering from a failure when a failure occurs in the P-CSCF.

FIG. 1A is an operation flowchart illustrating a process of backing up recovery information of S-CSCF in advance in order to recover from a failure when a network failure occurs in a conventional IMS network. Referring to FIG. 1A, a conventional IMS network includes a subscriber station (UE) 100, a P-CSCF 101, an I-CSCF 102, an S-CSCF1 103, and an HSS 104.

In the registration process of the IMS network, the S-CSCF1 103 may store the IMS registration information of the subscriber station 100 in advance to the HSS 104 in advance. For example, when the subscriber station 100 requests registration of the IMS network, the S-CSCF1 103 sends a server assignment request (SAR) message including registration and location information (PATH, CONTACT) to the HSS 104. And the registration information may be stored in the IMS network in the HSS 104 (reference numeral 111).

Then, when subscriber information is transmitted from the subscriber station 100, the S-CSCF1 103 transmits a SAR message including re-registration and subscriber information to the HSS 104 (reference numeral 112), and at the HSS 104 Subscriber information may be stored (113).

Through this process, the S-CSCF1 103 may back up the IMS network registration information of the subscriber station 100 to the HSS 104 in advance.

1B is a flowchart illustrating a process of recovering from a failure when a network failure occurs in a conventional IMS network. Referring to FIG. 1B, a conventional IMS network includes a subscriber station (UE) 120, a P-CSCF 121, an S-CSCF 122, an I-CSCF 123, an S-CSCF1 124, and an S-CSCF2. 125, P-CSCF / UE 126, and HSS 127.

The subscriber station 120 generates an INVITE message and transmits it to the P-CSCF 121 (130), and the P-CSCF 121 sends an INVITE message to the I-CSCF 123 via the S-CSCF 122. Can be transmitted. The I-CSCF 123 generates a Location Info Request (LIR) message for the S-CSCF search request and sends it to the HSS 127 (reference numeral 131), and the HSS 127 receives the retrieved S-CSCF1 124. A Location Information Answer (LIA) message including a message may be generated and transmitted to the I-CSCF 123 (see numeral 132).

Subsequently, when the I-CSCF 123 transmits an INVITE message to the S-CSCF1 124 (reference numeral 133), but a failure occurs in the S-CSCF1 124 (reference numeral 134), the I-CSCF 123 Send a LIR message requesting registration and an available S-CSCF to the HSS 127 (135) and receive a LIA message containing the S-CSCF available from the HSS 127 (reference 136). It is possible to select another S-CSCF other than S-CSCF1 124 by checking the CAPA of the available S-CSCFs (Fig. 137). In this case, the selected S-CSCF may be S-CSCF2 125.

When I-CSCF 123 sends an INVITE message to the newly selected S-CSCF2 125 (reference numeral 138), S-CSCF2 125 sends a SAR message to HSS 127 indicating that it is an unregistered subscriber ( 139, by receiving a SAA message containing an allocation error from the HSS 127 (140), recovering subscriber information (141), and sending an INVITE message to the P-CSCF / UE 126. (142), and a session can be established accordingly (143).

As such, when an incoming service is not possible due to a failure of the S-CSCF1 124, the registration information of the subscriber station 100 stored in the HSS 104 is restored through another S-CSCF, such as the S-CSCF2 125. You can make incoming calls possible.

However, the S-CSCF recovery has a disadvantage that the information of the subscriber stations 100 and 120 of the S-CSCF previously backed up to the HSS 104 may be performed. This information may not be fully backed up due to HSS, SW update of S-CSCF, relocation of subscribers, etc. In this case, the S-CSCF registration procedure cannot be performed so that incoming call recovery is impossible. Have However, even if the S-CSCF recovery cannot be performed, when the P-CSCF recovery is performed, since the information of the subscriber station is registered in the IMS network again through the S-CSCF, recovery may be possible.

1C is a flowchart illustrating an operation for recovering when a failure occurs in a conventional P-CSCF. Referring to FIG. 1C, a conventional IMS network includes a subscriber station 150, an MME / SGSN 151, a failed P-CSCF 152, a new P-CSCF 153, an S-CSCF 154, and an HSS 155. ) May be included.

Assume that a failure occurs in the failed P-CSCF 152 among a plurality of systems included in the IMS network. When HSS 155 sends a SIP message to S-CSCF 154 (reference numeral 160), S-CSCF 154 sends a SIP message to failed P-CSCF 152 (reference numeral 161), but failed. Since a failure has occurred in the P-CSCF 152, the failed P-CSCF 152 may either not respond or send a SIP error message to the S-CSCF 154 (FIG. 162). S-CSCF 154 may send a Cx SAR message to HSS 155 (163) and may receive a Cx SAA message from HSS 155 (164).

Thereafter, after the MME / SGSN 151 exchanges S6a / S6d IDR / IDA or Gr ISD messages for the recovery of the P-CSCF through communication with the HSS 155 (reference numeral 165), the S-CSCF 154 May send a SIP response message to the HSS 155 (reference numeral 166).

Thereafter, when the MME / SGSN 151 transmits the IMS PDN release message to the subscriber station 150 (Fig. 167), the subscriber station 150 reestablishes the MME / SGSN 151 and the IMS PDN (Fig. Code). 168), by sending a SIP registration message to New P-CSCF 153 (reference numeral 169), and by sending a SIP registration message to S-CSCF 154 via New P-CSCF 153 (reference numeral 171). Registration may be completed (reference numeral 171).

As such, when a failure occurs in the P-CSCF, the first one call must be performed, such as a failure of the failed P-CSCF 152 in the P-CSCF registration procedure or an SIP error message sent to the S-CSCF 154. Will fail. When a P-CSCF failure is detected at the time of one call, the subscriber station 150 is induced to be re-registered with another P-CSCF, such as New P-CSCF 153, and then recovered. Incoming calls can be made from two incoming calls.

In addition, conventionally, when a failure of another system in the IMS network except the CSCF occurs, such as P-CSCF and S-CSCF, a separate recovery procedure does not exist, and thus, subscriber information cannot be recovered.

2 is a block diagram of a subscriber management system according to an embodiment of the present invention. Referring to FIG. 2, the subscriber management system 1 includes a subscriber station 200, an eNB 210, an MME 220, a P-CSCF 230, an S-CSCF 240, an HSS 250, and an IP-. SM-GW based system 260 may be included. The subscriber station 200, the eNB 210, the connection management device 220, the S-CSCF 230, the P-CSCF 240, the HSS 250, and the IP-SM-GW-based system 260 manage subscribers. Illustrates components that can be controlled by the system 1. In addition, the IMS network 2 may include a P-CSCF 230, an S-CSCF 240, an HSS 250, and an IP-SM-GW based system 260 as a system configuring the IMS network 2. Can be. Hereinafter, the MME 220 refers to a connection management device, the P-CSCF 230 refers to a second session control device, the S-CSCF 240 refers to a first session control device, and the HSS 250 refers to a subscriber information management server. Each performs the same function.

Each component of the subscriber management system 1 of FIG. 2 is generally connected via a network. A network refers to a connection structure capable of exchanging information between nodes such as terminals and servers, and includes a local area network (LAN), a wide area network (WAN), and the Internet (WWW: World). Wide Web), wired / wireless data communication network, telephone network, wired / wireless television communication network, and the like. Examples of wireless data networks include 3G, 4G, 5G, 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE), World Interoperability for Microwave Access (WIMAX), Wi-Fi, Bluetooth communication, Infrared communication, Ultrasound Communication, visible light communication (VLC), liFi (LiFi), and the like, but are not limited thereto.

In order to receive the IMS service, the mobile subscriber must perform the registration process. In this registration process, a call control function for controlling the call and service of the mobile subscriber station must be allocated. In order to provide such an IMS service, important functional elements of a subsystem in an IMS core network include a call session control function (CSCF) and a home subscriber server (HSS).

When the subscriber station 200 transmits a registration message for registering the terminal to the IMS network 2 and a subscriber information message including subscriber information to the eNB 210, the eNB 210 transmits a plurality of subscriber stations within the IMS network 2. The message can be sent to the system.

The connectivity management device 220 may perform functions such as authentication, security, and mobility management. The connection management device 220 may perform the authentication on the subscriber station 200 and then allow the subscriber station 200 to be connected to the LTE network. The connection management device 220 may protect the subscriber station 200 by calculating an encryption key and a defect free protection key. The connection management apparatus 220 records and tracks in which region the subscriber station 200 is located, and when the subscriber station 200 moves from the first region to the second region, the eNB connected with the subscriber station 200 ( 210 may be changed to another eNB.

CSCF is a device that handles registration and multimedia call processing using SIP (Session Initiation Protocol), relay call control function device (P-CSCF: Proxy-Call Session Control Function, 230), query / answer call control function device ( I-CSCF is divided into Interrogate-Call Session Control Function (S-CSCF) and Serving-Call Session Control Function (S-CSCF).

The P-CSCF 230 corresponding to the first session control device is a point where the mobile subscriber first connects to the network. The P-CSCF 230 delivers the SIP registration request message of the mobile subscriber to the I-CSCF 235 with reference to the subscriber's home domain and maintains a security relationship with the mobile subscriber.

The I-CSCF 235 obtains the address of the S-CSCF 240 that performs SIP registration of the mobile subscriber from the HSS 250 and allocates the S-CSCF 240 that is responsible for the actual registration of the mobile subscriber. Play a role.

The S-CSCF 240 downloads and stores the subscription information of the mobile communication subscriber from the HSS 250 and provides a corresponding service to the mobile communication subscriber. In order to process an IMS call, the subscriber must register with the S-CSCF 240 using the subscriber's IP and ID, for example, a phone number and a login ID. At this time, the I-CSCF 235 queries the HSS 250 to determine which S-CSCF 240 is registered.

The HSS 250 serves as a master database that manages subscriber information of mobile communication subscribers. The HSS 250 functions as a home location register (HLR) and manages and authenticates mobility of IP multimedia subscribers. It is a database with integrated functionality. In addition, the HSS 250 is IMS registration information, location registration information (3G MSC GT, 3G SGSN GT) of the subscriber terminal 200, LTE location registration information (LTE MME Hostname) and incoming network support information of the subscriber terminal 200 (VoLTE enabled, VoLTE impossible), and the destination network and the destination routing node (3G MSC GT-MSC Number, S-CSCF Name) of the incoming message can be determined based on the stored information.

The IP-SM-GW based system 260 is a system existing in the IMS network 2, and may be a system that provides a text service such as SMS through the IMS network 2.

In order to process the IMS call, the S-CSCF 240 needs to be registered using the IP and ID of the mobile subscriber, for example, a phone number and a login ID. At this time, the I-CSCF 235 queries the HSS 250 to determine which S-CSCF 240 should be registered. A brief description of the entire call processing process including this process is as follows.

First, when the P-CSCF 230 receives a request from the mobile subscriber to register with the I-CSCF 235, the I-CSCF 235 requests the HSS 250 to find the S-CSCF 240 to register. S-CSCF 240 makes a search request. The HSS 250 determines whether an existing S-CSCF 240 exists, and if there is an existing S-CSCF 240, the corresponding S-CSCF 240 information is used for re-registration. The I-CSCF 235 responds, otherwise the I-CSCF 235 tells it to judge for itself. When the HSS 250 informs the S-CSCF 240 information, the I-CSCF 235 transmits a registration request message to the corresponding S-CSCF 240, and the S-CSCF 240 receives the registration request message. The mobile subscriber sends a status message to the HSS 250 indicating that the subscriber is registered. On the other hand, when the HSS 250 transmits a registration status response message to the corresponding S-CSCF 240, IMS call processing service control for the corresponding S-CSCF 240 becomes possible.

3 is a block diagram of a subscriber information management server according to an embodiment of the present invention. Referring to FIG. 3, the subscriber information management server 250 may include an input unit 310, a subscriber extractor 320, a message generator 330, and a transmitter 340.

The input unit 310 may receive information on a system in which a failure occurs among a plurality of systems included in the IMS network. For example, the input unit 310 may receive a command from a manager terminal (not shown) indicating a system in which a failure occurs among a plurality of systems included in the IMS network.

The subscriber extracting unit 320 may extract a subscriber registered in a system in which a failure occurs based on the subscriber information previously stored in the subscriber information management server 250. Here, the subscriber information includes a subscriber identifier (PRID / PUID / IMSI), a first session control device name (S-CSCF name), a second session control device address (P-CSCF address), and an IP / SM / GW address (IP-SM). -GW address, S-CSCF Restoration information of the first session control device, an MME address of the connection management device, an IMS user state of the IMS network with respect to the subscriber, and the like. The subscriber identifier is information used as a key of the subscriber. The first session control device (S-CSCF) 240 name is that when the subscriber registers with the IMS network, the S-CSCF 240 registers its address in the HSS 250. The second session control device address is in the S-CSCF 240 recovery information that the S-CSCF 240 backs up to the HSS 250. IP-SM-GW address is registered with its own address on the registration, HSS (250) of the IP-SM-GW (260) Third parties (3 ^rd -party). The address of the connection management device is that when the LTE location registration, the MME 220 registered its information on the HSS (250). The registration status of the IMS network for the subscriber may include registration / unregistration / deregistration. By using such subscriber information, it is possible to extract subscribers affected by the failure generated in the IMS network.

For example, if the failing system is a first session control device (eg, S-CSCF, 240), the subscriber extractor 320 registers with the first session control device 240 using subscriber information. The recovery information of the first session control device 240 among the subscribers may extract a subscriber corresponding to an abnormal condition. The reason why the recovery information of the first session control device 240 extracts only a subscriber corresponding to an abnormal condition is different from when a failure occurs in the second session control device 230, but the first session control device 240 is normally performed. This is because the first incoming call does not occur and the incoming call succeeds immediately.

Here, the abnormal condition is that the subscriber is registered in the IMS network (IMS User State = Registration), but the recovery information of the first session control device 240 does not exist in relation to the subscriber or the first session control device The storage time of the recovery information of the 240 may include at least one of the cases that are earlier than the registration time of the first session control device 240. That is, when a subscriber registers in the IMS network, the first session control device 240 should back up the network registration information of the subscriber station 200 which it has to the HSS 250. However, if the network registration information does not exist, the recovery of the first session control device 240 cannot be performed. In addition, when the recovery time is more than the registration time, since the information of the first session control device 240 is information of the past that is not normally updated at the time of the last registration time, the information of the first session control device 240 is determined by the past information. When the recovery occurs, the incoming call fails because the information restored by the first session control device 240 is not the latest information.

In another example, when the failing system is the second session control device (eg, P-CSCF, 230), the subscriber extracting unit 320 uses the subscriber information to send the second session control device 230 to the second session control device 230. All registered subscribers can be extracted.

For another example, if the failing system is an Internet Protocol (IP), Subnet Mask (SM) and Gateway (GW) based system 260, the subscriber extracting unit 320 may be an IP, SM and GW based system ( 260) can extract all of the subscribers registered to the third party (3 ^rd -party).

The message generator 330 may generate a re-registration request message for the IMS network. For example, the message generator 330 generates a re-registration request message based on an IDR (Insert Subscriber Data Request Message) transmitted to a connection management device (MME) for recovery of the P-CSCF. can do.

The transmitter 340 may transmit an Insert Subscriber Data Request Message to the connection management apparatus 220 associated with the extracted subscriber. Here, the re-registration request message may be a message generated to restore the extracted subscription state of the subscriber and to induce re-registration of the IMS network.

For example, when the failing system is the first session control device 240, the transmission unit 340 connects the re-registration request message for re-registering the subscriber corresponding to the extracted abnormal condition in the IMS network. And transmit to 220.

For another example, when the failing system is the second session control device 230, the transmitter 340 may be configured to re-register all subscribers registered in the extracted second session control device 230 to the IMS network. The re-registration request message may be transmitted to the connection management device 220. In this case, when an incoming call occurs, the transmitter 340 may transmit a re-registration request message to the connection management device 220 in advance before it occurs due to the failure detection of the second session control device 230.

As another example, a failure occurs the IP system, if the SM and GW-based system 260, the material of all subscribers registered in the transfer unit 340 extracts the third-party (3 ^rd -party) in IMS networks The re-registration request message for registering may be transmitted to the connection management apparatus 220.

Through this process, subscriber information of the subscriber may be restored by the connection management device 220 and re-registered in the IMS network.

4 is a flowchart illustrating a method of managing a subscriber in an IMS network in a subscriber information management server according to an embodiment of the present invention. The method for managing subscribers in the IMS network in the subscriber information management server 250 shown in FIG. 4 includes the steps processed in time series by the subscriber management system 1 according to the embodiment shown in FIGS. 1A to 3. do. Therefore, even if omitted below, the method is applied to the method of managing the subscriber in the IMS network in the subscriber information management server 250 according to the embodiment shown in Figs.

In operation S410, the subscriber information management server 250 may receive information on a system in which a failure occurs among a plurality of systems included in the IMS network.

In operation S420, the subscriber information management server 250 may extract a subscriber registered in a system in which a failure occurs based on the subscriber information previously stored in the subscriber information management server 250.

In operation S430, the subscriber information management server 250 may generate a re-registration request message for the IMS network.

In operation S440, the subscriber information management server 250 may transmit a re-registration request message to the connection management apparatus 220 associated with the extracted subscriber.

In the above description, steps S410 to S440 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted as necessary, and the order between the steps may be switched.

5 is a flowchart illustrating a method for managing a subscriber according to a system in which a failure occurs in a subscriber information management server according to an embodiment of the present invention. Referring to FIG. 5, the subscriber information management server 250 may restore the state information of the subscriber based on a system in which a failure occurs among a plurality of systems included in the IMS network.

The subscriber information management server 250 may determine whether the failing system among the plurality of systems included in the IMS network is the S-CSCF 240 which is the first session control device (S501). For example, when the failing system is the S-CSCF 240 (S502), the subscriber information management server 250 may check whether the subscriber information is registered in the failing S-CSCF 240 (S503). . If the subscriber information is registered in the failed S-CSCF 240 (S504), the subscriber information management server 250 is abnormal condition for the recovery information of the S-CSCF 240 among the subscribers registered in the S-CSCF 240 In step S506, when the recovery information of the S-CSCF 240 corresponds to an abnormal condition (S506), the subscriber corresponding to the abnormal condition is extracted (S508), and a re-registration request message is extracted. The subscriber can be transmitted to the connection management device 220 is located (S509).

If the subscriber information management server 250 is not registered in the S-CSCF 240 that has failed in the subscriber information (S505), the recovery information of the S-CSCF 240 among the subscribers registered in the S-CSCF 240 is abnormal If the condition does not correspond (S510), when the failing system is not the S-CSCF 240 (S511), the failing system among the plurality of systems included in the IMS network is the P-CSCF (the second session control device). 230, it may be determined (S512).

For example, if the failing system is the P-CSCF 230 (S512), it is possible to check whether the subscriber information is registered in the failing P-CSCF 230 (S514). When the subscriber information is registered in the P-CSCF 230 where the failure occurs (S516), the subscriber information management server 250 extracts the subscriber whose subscriber information is registered in the P-CSCF 230 (S517) and requests for re-registration. The message may be transmitted to the connection management device 220 where the extracted subscriber is located (S509).

The subscriber information management server 250 does not register the subscriber information in the P-CSCF 230 which has failed (S515) and when the failed system is not the P-CSCF 230 among a plurality of systems included in the IMS network. In operation S518, it may be determined whether the system in which the failure occurs among the plurality of systems included in the IMS network is the IP-SM-GW-based system 260 (S519).

For example, when the failing system is the IP-SM-GW based system 260 (S520), it is possible to check whether the subscriber information is registered in the failing IP-SM-GW based system 260 (S521). . When the subscriber information is registered in the failed IP-SM-GW based system 260 (S523), the subscriber information management server 250 extracts the subscriber whose subscriber information is registered in the IP-SM-GW based system 260. In operation S517, the re-registration request message may be transmitted to the connection management apparatus 220 in which the extracted subscriber is located (S509).

If the subscriber information management server 250 is not registered in the failed IP-SM-GW based system 260 (S522) or if the failed system is not the IP-SM-GW based system 260 ( S524) recovery of the state information of the subscriber can be terminated.

If a failure occurs in a system included in the IMS network through this process, the subscriber corresponding to the above condition is extracted and the subscriber can be received by inducing re-registration to the network through the connection management device 220 of the LTE network. It has the advantage of being able to recover immediately. By performing all the subscribers in the subscriber information management server 250 through the above procedure, it is possible to restore the entire subscriber to the callable state.

In the above description, steps S501 to S524 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted as necessary, and the order between the steps may be switched.

The method for managing a subscriber in an IMS network in the subscriber information management server described with reference to FIGS. 2 to 5 is also implemented in the form of a computer program stored in a medium executed by a computer or a recording medium including instructions executable by the computer. Can be. In addition, the method of managing a subscriber in an IMS network in the subscriber information management server described with reference to FIGS. 2 to 5 may be implemented in the form of a computer program stored in a medium executed by a computer.

Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer readable medium may include a computer storage medium. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

200: user terminal
210: eNB
220: connection management device (MME)
230: first session control device (S-CSCF)
240: second session control device (P-CSCF)
250: subscriber information management server (HSS)
260: IP-SM-GW based system
310: input unit
320: subscriber extracting unit
330: message generating unit
340: transmission unit

Claims (19)

In the subscriber information management server for managing subscribers in an Internet Protocol Multimedia Subsystem (IMS) network,
An input unit for receiving information of a system in which a failure occurs among a plurality of systems included in the IMS network;
From the subscriber information registered in the plurality of systems included in the subscriber information pre-stored in the subscriber information management server, the subscriber information registered in the system in which the failure has occurred is checked, A subscriber extracting unit for extracting a registered subscriber;
A message generator for generating a re-registration request message for the IMS network; And
Transmission unit for transmitting the re-registration request message to the connection management device associated with the extracted subscriber
Including,
If the failing system is a first session control device (S-CSCF),
And the subscriber extracting unit extracts a subscriber whose recovery information of the first session control device corresponds to an abnormal condition among the subscribers registered in the first session control device using the subscriber information.
delete The method of claim 1,
And the transmitting unit transmits the re-registration request message for re-registering the subscriber corresponding to the extracted abnormal condition to the IMS network to the connection management apparatus.
The method of claim 1,
The abnormal condition is that the subscriber is registered in the IMS network,
At least any of when there is no recovery information of the first session control device in relation to the subscriber or when a storage time for the recovery information of the first session control device is earlier than a registration time of the first session control device. The subscriber information management server, including one.
The method of claim 1,
If the failing system is a second session control device,
And the subscriber extracting unit extracts all subscribers registered in the second session control device using the subscriber information.
The method of claim 5,
And the transmission unit transmits the re-registration request message for re-registering all subscribers registered in the extracted second session control device to the IMS network to the connection management device.
The method of claim 1,
If the failing system is an Internet Protocol (IP), Subnet Mask (SM) and Gateway (GW) -based system,
Of the subscriber extracting unit to extract all the subscribers registered to the third party (3 ^rd -party) of the IP, SM and GW-based system, a subscriber information management server.
The method of claim 7, wherein
And the transmitting unit transmits the re-registration request message for re-registering all subscribers registered in the extracted third party to the IMS network to the connection management apparatus.
The method of claim 1,
The subscriber information includes a subscriber identifier, a first session control device name, a second session control device address, an IP / SM / GW address, recovery information of the first session control device, an address of the connection management device, and the IMS for the subscriber. Subscriber information management server comprising at least one of the registration status of the network.
The method of claim 1,
The subscriber information of the subscriber is restored by the connection management device is re-registered in the IMS network, subscriber information management server.
A method of managing a subscriber in an Internet Protocol Multimedia Subsystem (IMS) network in a subscriber information management server,
Receiving information of a system in which a failure occurs among a plurality of systems included in the IMS network;
Confirming subscriber information registered in the failing system from subscriber information registered in the plurality of systems included in the subscriber information previously stored in the subscriber information management server;
Extracting subscribers registered in the failing system according to the confirmed subscriber information;
Generating a re-registration request message for the IMS network; And
Transmitting the re-registration request message to a connection management device associated with the extracted subscriber;
If the failing system is a first session control device (S-CSCF),
The extracting of the subscriber may include extracting a subscriber whose recovery information of the first session control device corresponds to an abnormal condition among subscribers registered in the first session control device using the subscriber information.
delete The method of claim 11,
The transmitting may include transmitting, to the connection management device, the re-registration request message for re-registering a subscriber corresponding to the extracted abnormal condition to the IMS network.
The method of claim 11,
The abnormal condition is that the subscriber is registered in the IMS network,
At least any of when there is no recovery information of the first session control device in relation to the subscriber or when a storage time for the recovery information of the first session control device is earlier than a registration time of the first session control device. It will include one, recovery method.
The method of claim 11,
If the failing system is a second session control device,
The extracting of the subscribers comprises extracting all the subscribers registered in the second session control device using the subscriber information.
The method of claim 15,
The transmitting may include transmitting, to the connection management device, the re-registration request message for re-registering all subscribers registered in the extracted second session control device to the IMS network.
The method of claim 11,
If the failing system is an Internet Protocol (IP), Subnet Mask (SM) and Gateway (GW) -based system,
Extracting the access method is to extract all the subscribers registered to the third party (3 ^rd -party) of the IP, SM and GW-based systems, recovery.
The method of claim 17,
The method comprising the transmission method is to transmit to all the subscribers registered to the extracted third-party (3 ^rd -party) wherein the re-registration request message for re-registration to the IMS network connection management device, recover.
A computer program stored in a medium containing a sequence of instructions for managing a subscriber in an Internet Protocol Multimedia Subsystem (IMS) network,
When the computer program is executed by a computing device,
Receiving information of a system in which a failure occurs among a plurality of systems included in the IMS network,
From the subscriber information registered in the plurality of systems included in the stored subscriber information, the subscriber information registered in the system where the failure occurs,
Extracts subscribers registered in the failing system according to the confirmed subscriber information,
Generate a re-registration request message for the IMS network;
Transmit the re-registration request message to the connection management device associated with the extracted subscriber;
If the failing system is a first session control device (S-CSCF),
When extracting the subscriber, using the subscriber information includes a sequence of instructions for extracting the subscriber that the recovery information of the first session control device corresponding to an abnormal condition among the subscribers registered in the first session control device; , Computer program stored on media.

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