KR101260800B1

KR101260800B1 - System and Method for registering location for moving of terminal

Info

Publication number: KR101260800B1
Application number: KR1020080097725A
Authority: KR
Inventors: 한덕희
Original assignee: 에스케이텔레콤 주식회사
Priority date: 2008-10-06
Filing date: 2008-10-06
Publication date: 2013-05-06
Also published as: KR20100038673A

Abstract

The present invention provides a location registration processing system by movement of a terminal when a plurality of call session control apparatuses exist in a mobile communication network, wherein a location registration request message is obtained when a location registration request message is received from a subscriber information management server and a terminal. The first call control device for transmitting a server allocation request message for the subscriber information management server to classify and store the application server list included in the subscriber information according to the location information of the terminal when the subscriber information is received, the terminal If the location information deletion request message is received from the subscriber information management server, the location registration information of the terminal is deleted and classified as the location information necessary server of the terminal from the previously stored application server list. Application server exists In this case, the second call session control device is configured to notify the corresponding application server to delete the location registration information. When a plurality of call session control devices exist in the IMS network, the registered call session control is performed according to the change of the location of the terminal. If the device changes, the service provided by the application server to which the call session control device is interworked can be provided without any problem.

IMS, application, location registration, linkage

Description

System and method for registering location by moving a terminal {System and Method for registering location for moving of terminal}

The present invention relates to a location registration processing system and method by movement of a terminal. More particularly, when a plurality of call session control apparatuses exist in a mobile communication network, the call session control apparatus is changed by movement of a terminal. The location registration processing system and method by the movement of the terminal so that the control device updates the location registration information registered in the application server classified as the location information required server of the terminal, so that the service provided by the application server can be serviced without a problem. It is about.

Recently, there are not only circuit switching based communication networks such as CDMA (Code Division Multiple Access) networks, but also packet switching based communication networks, especially IP based communication. IMS (IP Multimedia Subsystem) network is used.

The IMS network is a communication network based on a communication network standard proposed by the 3rd Generation Partnership Project (3GPP). The IMS network provides an IP-based communication service and mainly uses a signaling protocol such as a Session Initiation Protocol (SIP).

A terminal subscribed to the IMS network (hereinafter, referred to as an 'IMS terminal') requests power location registration to a Call Session Control Function (CSCF) of the IMS network when the power is turned on (eg, HSS: Home). Try to register the location with Subscriber Server.

The CSCF is responsible for the exchange function in the IMS network and manages the location registration of the IMS network service subscriber, which is one of the general basic functions of the exchange.

However, conventionally, when two or more call session control devices exist and the location registration is duplicated by two or more exchanges due to the location movement of the terminal, the invalid location registration has to be deleted. There is no detailed description on the interworking management with the application server that was linked with the previous exchange.

The present invention has been made to solve the above-described problems, and when a plurality of CSCFs exist in the IMS network, the service provided by the application server to which the CSCF is linked accordingly when the registered CSCF changes according to the location change of the terminal It is an object of the present invention to provide a location registration processing system and method by the movement of a terminal that can be serviced without problems.

In addition, the present invention provides a location registration processing system and method by the movement of the terminal to enable the application server that provides a specific service using the terminal information such as location information during the location registration process of the terminal to manage the terminal information. There is another purpose to provide.

According to an aspect of the present invention to achieve the above object, in the mobile communication network when there is a plurality of call session control device in the location registration processing system by the movement of the terminal, subscriber information management server, the subscriber information of the terminal is stored, When a location registration request message is received from the terminal, a server assignment request message for location registration and subscriber information acquisition is transmitted to the subscriber information management server, and when subscriber information is received from the subscriber information management server, the subscriber information is included in the subscriber information. The first call session control device which classifies and stores an application server list according to the location information of the terminal, and the terminal moves to the first call session control device area and receives a location information deletion request message from the subscriber information management server. If the location registration information of the terminal is deleted In addition, if there is an application server classified as a location information need server of the terminal among the pre-stored application server list, the location registration by the movement of the terminal including the second session control device to notify the corresponding application server to delete the location registration information A processing system is provided.

The first call session control device informs an application server classified as a location information necessary server of a terminal to the location registration information including the terminal identification information and its own identification information, and the application server according to the location registration information of the terminal. Update location information.

The application server receiving the location registration information deletion notification from the second call session control device deletes the location information by the second call session control device for the corresponding terminal.

The application server list in the subscriber information received by the first session control device from the subscriber information management server is a list of application servers linked to the first session control device, and the application server list stored in the second session control device is It may be a list of application servers linked to the second call session control device.

In the application server classified as the location information required server of the terminal, terminal identification information and location information to which call session control device identification information in which a session is established with the terminal are mapped are registered.

The subscriber information management server registers the location of the terminal based on the message when the server assignment request message is received from the first call session control device, and includes an application server list linked with the first call session control device. The subscriber information is transmitted to the first call session control device, and the location information deletion request message is transmitted to the second call session control device where the previous location registration information exists for the terminal.

According to another aspect of the present invention, when the location registration request message is received from the terminal, the database storing the state information of the terminal, and transmits a server assignment request message for location registration and subscriber information acquisition of the terminal to the subscriber information management server; Location registration processing unit for receiving the subscriber information including the application server list from the subscriber information management server, an application for classifying the application server list in the subscriber information received by the location registration processing unit according to the location information of the terminal to store in the database The call classifier includes a server registration unit and a location registration information notification unit that notifies the application server classified as the location information required server of the terminal by the application server classifier to the location registration information including the terminal identification information and its own identification information. A device is provided.

When the location information deletion request message is received from the subscriber information management server, the location registration processor deletes the location information of the corresponding terminal, and the location registration information is stored in the application server classified as the location information required server of the terminal from the previously stored application server list. The location registration information notification unit is requested to notify the deletion.

The application server classification unit correlates with a first classification that needs to know the location information of the terminal for the application server list included in the subscriber information, a second classification that needs to know the location information of the terminal but cannot process the changed location information, and the location information of the terminal. Classify the application server into a third class that does not exist.

According to another aspect of the present invention, in the method for processing location registration when the terminal moves to the first call session control device, (a) the location registration request message is received from the terminal in the first call session control device; (B) the subscriber information management server registering the location of the terminal based on the server allocation request message, and transmitting the server assignment request message for location registration and subscriber information acquisition; Transmitting a server assignment response message including subscriber information to the first call session control device and transmitting a location information deletion request message to a previous call session control device when the previous location registration information exists for the terminal; (c) the previous call session controlling apparatus deletes the location registration information of the terminal according to the location information deletion request message; Determining whether there is a list of application servers classified as location information necessary servers of the terminal by searching the provided database; and (d) the previous call session control device needs location information of the terminal as a result of the determination of step (c). When there is a list of application servers classified as servers, a location registration processing method is provided by moving a terminal, the method including informing a corresponding application server of deleting location registration information.

The first call session control device that receives the subscriber information in step (b) classifies and stores the application server list included in the subscriber information according to the location information of the terminal and stores the classified application server as the location information required server. There is provided a location registration processing method by movement of a terminal further comprising informing the application server of location identification information including identification information of the terminal and its own identification information.

In step (d), the application server receiving the location registration information deletion notification from the previous call session control device updates the location registration information of the corresponding terminal.

According to another aspect of the present invention, in the method for the call session control device to handle the location registration by the movement of the terminal, when a location registration request message is received from the terminal, server registration request for location registration and subscriber information acquisition Transmitting a message to a subscriber information management server, and when subscriber information is received from the subscriber information management server, classifying and storing an application server list included in the subscriber information according to whether location information of a terminal is needed and storing the stored application. If there is an application server classified as a location information required server in the server list, the location registration processing method by the movement of the terminal comprising the step of informing the application server location registration information including the identification information of the terminal and its own identification information This is provided.

Upon receiving the server assignment request message, the subscriber information management server registers the location of the terminal and transmits subscriber information including the application server list to the call session controller.

As described above, according to the present invention, when a plurality of CSCFs exist in an IMS network, when a registered CSCF is changed according to a change in the location of a terminal, a service provided by an application server to which the CSCF is interworked can be serviced without a problem. It is possible to provide a location registration processing system and method by movement of an existing terminal.

In addition, an application server that provides a specific service using terminal information such as location information in the location registration process of the terminal may also provide a location registration processing system and method by moving the terminal that can manage the terminal information. .

The foregoing and other objects, features, and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is a view showing a location registration processing system according to the movement of the terminal according to the present invention, Figure 2 is a conceptual diagram for explaining a location registration processing method according to the movement of the terminal according to the present invention.

Referring to FIG. 1, a location registration processing system according to a movement of a terminal may include an access network 110 that allows a communication terminal 100 to access an IMS network 200, and an IMS network 200 that provides an IP-based communication service. ).

The access network 110 is a mobile communication network to which the communication terminal 100 can access the IMS network 200. For example, 1x EV-DO includes a wired internet network, a base station, a base station controller, and a packet data service node. Network, Node B, radio network controller (RNC), SGSN, WCDMA (UMTS) network including GGSN, WiBro network including RAS and ACR.

The IMS network 200 includes a gateway (not shown) connected to the access network 110, a call session control device 130 (CSCF) for session control, an HSS (150, Home Subscriber Server, subscriber information management server), an application server ( 170 and a media processing device (not shown).

The call session control device 130 of the IMS network 200 may be a call session control function (CSCF). Of course, it will be more apparent from the following description that not only the CSCF but also all devices controlling the call session can be implemented equally as the session control device. Hereinafter, the call session control device 130 will be described using CSCF as an example.

The CSCF 130 registers the subscribed communication terminal with the HSS 150 and performs a function of routing SIP signaling to an appropriate server.

The CSCF 130 may include a Proxy CSCF (P-CSCF), a Serving CSCF (S-CSCF), and an Interrogating CSCF (I-CSCF). P-CSCF performs the same function as SIP proxy server. Compression / decompression of SIP message, authentication and QoS measurement of bearer resource, SIP register request from UE to I-CSCF Functions such as delivering. S-CSCF controls the session to the terminal and functions to maintain session state for service maintenance. The I-CSCF receives the SIP request from another network and routes it to the S-CSCF, and the address of the S-CSCF is obtained from the HSS. That is, the I-CSCF allows forwarding SIP requests and responses to the S-CSCF. P-CSCF, S-CSCF, and I-CSCF will be apparent to those skilled in the art, and thus a detailed description thereof will be omitted.

The CSCF 130 classifies and stores the coordinated application server included in the subscriber information received from the HSS 150 according to the location registration information of the terminal.

In addition, if there is a coordinated application server that needs to know the location registration information of the terminal, the CSCF 130 informs the location registration information and location registration deletion information to the application server.

Application server 170 provides video conference call service, video conference call-based technology, video conference call media control, intelligent network prepaid billing processing, billing information transmission, voice control function when performing push-to-talk (PTT) function, guidance It is a device for providing application functions such as broadcasting and ring-back-tone functions. Of course, one application server 170 may provide all application functions, but a plurality of application servers 170 may provide application functions according to respective functions.

The communication terminal 100 is a mobile communication terminal capable of processing SIP signaling, and not only a mobile phone but also all communication devices capable of performing IP-based communication such as a personal digital assistant (PDA) may be implemented in the same manner. It will be more apparent from the following description.

A location registration method when the terminal 100 moves from the first CSCF to the second CSCF in the system configured as described above will be described with reference to FIG. 2.

Referring to FIG. 2, when the terminal 100 moves from the second CSCF area to the first CSCF area and transmits a location registration request message to the first CSCF 130a, the first CSCF 130a registers the location and the subscriber. Receive subscriber information by transmitting a server assignment request (SAR) message for obtaining information to the HSS 150, and the application server list included in the received subscriber information according to whether the terminal needs location information Sort and save. The application server list included in the subscriber information may be an application server list linked to the first CSCF 130a.

The terminal 100 moves from the second CSCF area to the first CSCF area due to a change in the IP address and transmits a location registration request message to the first CSCF 130a.

The first CSCF 130a needs to know the location registration information of the terminal 100 and the location registration information of the terminal with respect to the changed location registration information with respect to the application server list received from the HSS 150. The application server list is classified into a second classification that cannot be processed and a third classification that is not related to the location registration information of the terminal. Here, the application server classified as the location information required server of the terminal stores location registration information to which the terminal and call session control device identification information in which the session is established are mapped.

In addition, the first CSCF 130a informs the application server classified as the location information necessary server of the terminal to the location registration information including the terminal identification information and its own identification information, and the corresponding application server according to the location registration information. Update the location information of the terminal.

When the server assignment request message is received from the first CSCF (130a), the HSS 150 registers the location of the terminal and includes a server assignment response message (SAA) including subscriber information of the terminal. Is transmitted to the first CSCF (130a).

In addition, the HSS 150 checks whether the previous location registration information exists for the terminal registered by the first CSCF 130a and, if present, requests deletion of the location registration to the previous CSCF. Here, the previous CSCF may be the second CSCF 130b.

The second CSCF 130b is located in the terminal 100 when the terminal 100 moves to the first CSCF region and receives a location termination request message (RTR) from the HSS 150. If the application server classified as the location information required server of the terminal 100 is deleted from the previously stored application server list, the corresponding application server 170 is notified of the deletion of the location registration information. Here, the pre-stored application server list may be an application server list linked with the second CSCF 130b.

The application server 170 that receives the location registration information deletion notification from the second CSCF 130b deletes the location information by the second CSCF 130b in the corresponding terminal 100.

3 is a block diagram schematically showing the configuration of a call session control apparatus according to the present invention.

Referring to FIG. 3, the call session control device (CSCF) 130 includes a communication unit 132, a database 134 in which state information of a terminal is stored, and a location registration processing unit 136 that processes location registration in accordance with a position movement of the terminal. The application server classifier 138 and the location registration information notification unit 140 for classifying the associated application server are included.

When the location registration request message is received from the terminal, the location registration processing unit 136 transmits a server assignment request message for location registration and subscriber information acquisition to a subscriber information management server and includes an application server list from the subscriber information management server. Subscriber information is received.

In addition, when the location information deletion request message is received from the subscriber information management server, the location registration processing unit 136 deletes the location registration information of the corresponding terminal, and is classified as the location information necessary server of the terminal from the previously stored application server list. The location registration information notification unit 140 is requested to notify the application server of deleting the location registration information.

Then, the location registration information notification unit 140 is a terminal to the application server classified as the location information required server of the terminal in the application server classifier 138 according to the location registration information notification request from the location registration processing unit 136. Informs the deletion of the location registration information including the identification information and its own identification information.

The application server classifier 138 classifies the application server list included in the subscriber information received by the location registration processor 136 according to the location information of the terminal and stores it in the database 134.

That is, the application server classifier 138 may correlate with the first classification that needs to know the location registration information of the terminal, the second classification that needs to know the location registration information of the terminal but cannot process the changed location registration information, and the location registration information of the terminal. Classify the application server into a third class that does not exist.

The location registration information notification unit 140 informs the application server classified by the application server classification unit 138 as the location information necessary server of the terminal to the location registration information including the identification information of the terminal and its own identification information. To perform.

4 is a flowchart illustrating a method for processing location registration by movement of a terminal according to the present invention.

Referring to FIG. 4, when the terminal moves from the second call session control device area to the first call session control device area and the location is changed, the terminal requests a location registration request from the first session device for location registration. Send a message (S400).

The location movement of the terminal may be performed by changing the IP address.

Upon receiving the location registration request message from the terminal, the first call session control apparatus transmits a server assignment request message (SAR) for location registration and subscriber information acquisition to the subscriber information management server (S402).

Then, the subscriber information management server registers the location of the terminal and transmits a server assignment response message (SAA) including subscriber information to the first call session controller (S404). The subscriber information includes a list of application servers linked with the first call session control device.

The subscriber information management server checks whether the previous location registration information exists for the terminal, and if there is a location information deletion request message to a previous call session control device (hereinafter referred to as a second call session control device). (RTR) is transmitted (S406). The location information deletion request message includes terminal identification information and second call session control device identification information.

Then, the second call session control device deletes the location registration information of the terminal according to the location information deletion request message and transmits a location registration information deletion completion message (RTA) to the subscriber information management server (S408).

Then, the second call session control apparatus searches the provided database to determine whether there is an application server classified as the location information necessary server of the terminal (S410).

As a result of the determination in S410, if there is an application server classified as a location information need server of the terminal, the second call session control device notifies the corresponding application server of de-register (S412).

Then, the application server deletes the location information registered in the second call session control device for the terminal and transmits the response message to the second call session control device (S414).

5 is a flowchart illustrating a method of registering a location with a subscriber information management server by a call session control device to which a terminal moves according to the present invention.

Referring to FIG. 5, when a location registration request message is received from a terminal (S500), the call session control apparatus transmits a server assignment request message for location registration and subscriber information acquisition of the terminal to a subscriber information management server (S502). .

Then, the subscriber information management server registers the location of the terminal according to the server assignment request message (S504), and transmits a server assignment completion message including subscriber information of the terminal to the call session controller (S506). .

The call session control apparatus classifies and stores the application server list included in the received subscriber information according to whether the terminal needs location information (S508). The subscriber information includes application server list information. Accordingly, the call session control apparatus may include a first classification that needs to know the location registration information of the terminal, a second classification that needs to know the location registration information of the terminal but cannot process the changed location registration information, and a third category that is not related to the location registration information of the terminal. Classify and store application servers by classification.

Then, the call session control apparatus determines whether an application server classified as a location information required server exists in the stored application server list (S510).

If there is an application server classified as a location information required server as a result of the determination in S510, the call session control apparatus informs the corresponding application server of location registration information including identification information of the terminal and its own identification information (S512).

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

As described above, the system and method for location registration processing by movement of a terminal according to the present invention processes location registration by movement of a terminal when a plurality of call session control apparatuses exist in a mobile communication network, and interworks with a corresponding call session control apparatus. The service provided by the existing application server can be used for a technology that can provide a problem without problems.

1 is a view showing a position registration processing system according to the movement of a terminal according to the present invention.

2 is a conceptual diagram illustrating a location registration processing method according to movement of a terminal according to the present invention;

Figure 3 is a block diagram schematically showing the configuration of a call session control apparatus according to the present invention.

4 is a flowchart illustrating a location registration processing method by movement of a terminal according to the present invention;

5 is a flowchart illustrating a method of registering a location with a subscriber information management server by a call session control device to which a terminal moves according to the present invention;

100: terminal 110: access network

130: CSCF (call session control device) 132: communication unit

134: database 136: location registration processing unit

138: coordinated application server classification unit 140: location registration information notification unit

150: subscriber information management server (HSS) 170: application server

Claims

In the location registration processing system by the movement of the terminal when a plurality of call session control device exists in the mobile communication network,

A subscriber information management server storing subscriber information of a terminal;

When a location registration request message is received from the terminal, a server assignment request message for location registration and subscriber information acquisition is transmitted to the subscriber information management server, and when subscriber information is received from the subscriber information management server, the subscriber information is included in the subscriber information. The first call session control device for classifying and storing the application server list according to the location information of the terminal;

When the terminal moves to the first call session control device area and receives a location information deletion request message from the subscriber information management server, the terminal deletes the location registration information of the terminal, and the server needs the location information of the terminal from the previously stored application server list. A second call session control device for notifying deletion of location registration information to the corresponding application server when the application server classified as is present;

Location registration processing system by the movement of the terminal comprising a.

The method of claim 1,

The first session control apparatus informs an application server classified as a location information necessary server of a terminal to location registration information including terminal identification information and its own identification information, and the corresponding application server according to the location registration information. The location registration processing system by the movement of the terminal, characterized in that for updating the location information.

The method of claim 1,

The application server receiving the location registration information deletion notification from the second call session control device deletes the location information by the second call session control device for the terminal.

The method of claim 1,

The application server list in the subscriber information received by the first session control device from the subscriber information management server is a list of application servers linked to the first session control device, and the application server list stored in the second session control device is Location registration processing system by the movement of the terminal, characterized in that the application server list linked to the second session control device.

The method of claim 1,

And location information mapped with terminal identification information and call session control device identification information in which a session is established with the terminal is registered in an application server classified as a location information required server of the terminal.

The method of claim 1,

The subscriber information management server registers the location of the terminal based on the message when the server assignment request message is received from the first call session control device, and includes an application server list linked with the first call session control device. The subscriber information is transmitted to the first call session control device, and the location information deletion request message is transmitted to the second call session control device where the previous location registration information exists for the terminal. Location registration processing system.

A database storing state information of the terminal;

When a location registration request message is received from a terminal, a server assignment request message for location registration and subscriber information acquisition of the terminal is transmitted to a subscriber information management server to receive subscriber information including an application server list from the subscriber information management server. A location registration processor;

An application server classifier for classifying the application server list in the subscriber information received by the location registration processor according to the location information of the terminal and storing the list in the database; and

A location registration information notification unit for notifying an application server classified as a location information required server of a terminal by the application server classification unit, location registration information including identification information of the terminal and identification information of the terminal;

Call session control device comprising a.

The method of claim 7, wherein

When the location information deletion request message is received from the subscriber information management server, the location registration processor deletes the location information of the corresponding terminal, and the location registration information is stored in the application server classified as the location information required server of the terminal from the previously stored application server list. And requesting the location registration information notification unit to notify the deletion.

The method of claim 7, wherein

The application server classification unit correlates with a first classification that needs to know the location information of the terminal for the application server list included in the subscriber information, a second classification that needs to know the location information of the terminal but cannot process the changed location information, and the location information of the terminal. Call session control device, characterized in that to classify the application server with a third classification.

In the location registration processing method when the terminal moves to the first call session control device,

(a) transmitting a server assignment request message for location registration and subscriber information acquisition to a subscriber information management server when the location registration request message is received from the terminal at the first call session control device;

(b) the subscriber information management server registers the location of the terminal based on the server assignment request message, and transmits a server assignment response message including subscriber information of the terminal to the first call session control device; Transmitting a location information deletion request message to a previous call session control device when the previous location registration information exists for the terminal;

(c) The previous call session control apparatus deletes the location registration information of the corresponding terminal according to the location information deletion request message, and searches the provided database to determine whether there is a list of application servers classified as location information necessary servers of the terminal. Step; and

(d) when the previous call session control device determines that there is an application server list classified as the location information required server of the terminal as a result of the determination of step (c), informing the corresponding application server of deleting the location registration information;

Location registration processing method by the movement of the terminal comprising a.

The method of claim 10,

Receiving the subscriber information in step (b), the first call session control device classifies and stores the application server list included in the subscriber information according to the location information of the terminal and stores the classified application information as a location information required server. And informing a server of location registration information including identification information of the terminal and identification information of the terminal.

The method of claim 10,

The application server receiving the location registration information deletion notification from the previous call session control device in the step (d) updates the location registration information of the terminal characterized in that the movement of the terminal.

In the method of the call session control device handles the location registration by the movement of the terminal,

If a location registration request message is received from the terminal, transmitting a server assignment request message for location registration and subscriber information acquisition to a subscriber information management server;

When the subscriber information is received from the subscriber information management server, classifying and storing the application server list included in the subscriber information according to the location information of the terminal;

Informing the location registration information including the identification information of the terminal and the identification information of the terminal to the corresponding application server when the application server classified as the location information required server exists in the stored application server list;

14. The method of claim 13,

The subscriber information management server receiving the server assignment request message registers the location of the terminal and transmits subscriber information including an application server list to the call session control device. Way.