KR100952704B1 - Method and System for managing a public identity related with a plurality of private identities in IP Multimedia Subsystem - Google Patents

Abstract

The present invention relates to a public identifier processing for sharing a plurality of personal identifiers in an Internet protocol multimedia subsystem environment capable of call processing for a subscriber having a plurality of personal identifiers and a plurality of public identifiers corresponding to each individual identifier. According to the present invention, a method of processing a public identifier in an internet protocol multimedia sub-system interworking with a home subscriber server and a call session control device may include extracting personal identifiers associated with public identifiers to be unregistered; (B) generating a deregistration request message including a personal identifier, and (c) transmitting the generated deregistration request message to the call session control device, wherein the individual is deactivated by the deregistration request message. Register all public identifiers belonging to the identifier. It is.

RTR message, personal identifier, public identifier

Description

Method and System for Managing a Public Identity Related with a Multiple of Private identities in IP Multimedia Subsystem in Internet Protocol Multimedia Subsystem

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing public identity, and to a method and system for processing a public identifier that shares a plurality of private identities in an Internet Protocol multimedia subsystem.

Recently, with the rapid development of mobile communication and the Internet, it is required to realize various multimedia services of high quality for mobile terminal subscribers. The development of the Internet multimedia service required a change from a circuit-based core network to a packet-based core network, and furthermore, an IP (Internet Protocol) based core network. It is seeking to evolve into form.

Currently, 3GPP has standardized ALL IP-based network reference model to provide IP-based multimedia service. IP-based multimedia service provides mobile subscribers with various types of packet-based services based on IP transport protocol. A service that can be provided at the same time. This allows subscribers to simultaneously use existing real-time services such as voice and video, as well as non-real-time services such as file transfer, e-mail, and short messages, or use new services using these services, For example, it means making video phones, instant messaging, emergency calls, location services, presence services, and the like available.

Meanwhile, 3GPP standardizes the ALL IP network reference model and provides a Call Session Control Function (CSCF) and a Home Subscriber Server to provide an IP-based multimedia service. A sub system including a functional element such as hereinafter referred to as 'HSS' is defined, which is called an IP multimedia sub-system (IMS).

At this time, CSCF is in charge of registration and multimedia call processing function using Session Initiation Protocol (SIP). CSCF performs different functions depending on the network where subscriber is located. It can be logically divided into Proxy-CSCF (P-CSCF), Interrogating-CSCF (I-CSCF), and Serving-CSCF (S-CSCF). The P-CSCF is a first point of access for a user equipment (UE) to the IMS network, and the I-CSCF is a first point of access to a home network of the UE, and several P-CSCFs may exist in one network domain. . The S-CSCF registers that the server performs session control of the UE in the HSS and then downloads and stores subscriber information of the UE. In addition, the S-CSCF performs a control service while managing session state of an actually registered UE, and provides information related to service resources to the UE.

On the other hand, HSS is a function element that manages and manages mobility of IP multimedia user as well as home location register (HLR) function of legacy mobile network, and various calls between CSCF and HSS for smooth IMS service. Processing is performed.

In addition, the HSS processes the subscriber identifier relationship for each service. Since the identifier for determining the unique subscriber in the circuit switched domain, the packet switched domain, and the IMS is different, the HSS provides an appropriate relationship between them. In particular, the IMS determines a unique subscriber by using a private identity and a public identifier. For example, the personal identifier may be unique identification information or universal subscriber identity module of each terminal. USIM) unique information of the card, the public identifier can be understood as the telephone number of each terminal.

However, the present 3GPP (3 ^rd Generation Partnership Project) specification in the only call processing structure of the CSCF and the HSS for a subscriber having a personal identifier and a plurality of public identifiers corresponding thereto is to be defined only per user, one per subscriber, Call processing for subscribers having a plurality of personal identifiers and a plurality of public identifiers corresponding thereto is not defined.

Thus, when one subscriber has a plurality of personal identifiers, processing for the corresponding public identifier may be problematic.

For example, assuming that there is one personal identifier prid_100 per subscriber and three public identifiers puid_101, puid_102, and puid_103 corresponding thereto, as shown in FIG. 1, the first public identifier 'puid_101' 'If you want to delete, that is, if you want to unregister the first public identifier' puid_101 'for the subscriber in the S-CSCF of the IMS network, the HSS will simply register the' puid_101 'in the Registration-Termination-Request Message. The first public identifier 'puid_101' can be deregistered by including the information and passing it to the CSCF.

However, when one subscriber has two personal identifiers prid_100 and prid_200 and three public identifiers puid_201, puid_202, and puid_203, as shown in FIG. 2, the first public identifier 'puid_201' is 2 Since it is associated with the individual personal identifiers 'prid_100' and 'prid_200', the subscriber cannot be deregistered by the above method.

Accordingly, there is a need for a method of deleting or unregistering a public identifier sharing two personal identifiers in a structure having a plurality of personal identifiers.

In order to achieve the above object, according to the present invention, it is possible to process a call for a subscriber having a plurality of personal identifiers and a plurality of public identifiers corresponding to each individual identifier, and an internet protocol to which a home subscriber server and a call session control device are interworked. The method of processing a public identifier in a multimedia subsystem includes (a) extracting personal identifiers associated with public identifiers to be deregistered, and (b) generating a deregistration request message including the extracted personal identifiers. And (c) transmitting the generated deregistration request message to the call session control device, wherein all the public identifiers belonging to the personal identifier are released by the deregistration request message.

In addition, in order to achieve the above object, according to the present invention, a call processing for a subscriber having a plurality of personal identifiers and a plurality of public identifiers corresponding to each individual identifier is possible, and the home subscriber server and the call session control apparatus are interworked. The public identifier processing method in the public identifier processing method in the Internet protocol multimedia subsystem includes the steps of (a) generating a deregistration request message including at least one public identifier to be deregistered, and the generated deregistration. (B) sending a request message to the call session control device, wherein the at least one public identifier shares a plurality of personal identifiers, and registration of the at least one public identifiers is made by the deregistration request message. Is released.

Furthermore, in order to achieve the above object, according to the present invention, a public identifier in an Internet protocol multimedia subsystem environment capable of call processing for a subscriber having a plurality of personal identifiers and a plurality of public identifiers corresponding to each individual identifier is processed. To generate a deregistration request message according to a first mode for deregistering all public identifiers belonging to the personal identifier or a second mode for deregistering at least one or more public identifiers sharing a plurality of personal identifiers. And a call session control device for receiving a home subscriber server for transmitting and transmitting the deregistration request message and deregistering a corresponding public identifier according to the first mode or the second mode.

According to the present invention, in an IMS environment that accommodates a plurality of personal identifiers and public identifiers, there is an effect of more effectively deleting or unregistering a public identifier sharing a plurality of personal identifiers.

Specific details of embodiments of the present invention are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

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

First of all, in order to make the understanding of the present invention easier, it is explained that the registration of all the public identifiers corresponding to a specific personal identifier or the registration of a specific public identifier is divided and described below. The mode and the latter will be expressed as the second mode.

That is, referring to FIG. 2, the first mode means deregistering all of the public identifiers 'puid_201' and 'puid_202' included in the personal identifier 'prid_100', and the second mode is included in the personal identifier 'prid_100'. This means that the registered public identifier 'puid_201' is deregistered. At this time, the public identifier 'puid_201' shares two personal identifiers.

3 is a diagram illustrating a public identifier processing system according to an embodiment of the present invention.

Referring to FIG. 3, the system according to the present invention includes a subscriber station 350, a RAN 312, an SGSN 314, a GGSN 316, and a P-CSCF 316 and a home network constituting a visited network 310. I-CSCF 324, S-CSCF 326 and HSS 322 that make up 320.

In a 3GPP system, a radio access network controller constituting the RAN 312 generally communicates with the SGSN 314 using an Iu-interface protocol, and the SGSN 314 performs a general packet radio service (GPRS). ) To communicate with the GGSN 316 through the backbone network.

The P-CSCF 316 is the first point at which the subscriber station 350 connects to the IMS network. When the subscriber request message is transmitted from the subscriber station 350, the P-CSCF 318 receives the registration request message (REGISTER). Forward to I-CSCF 324. The P-CSCF 318 stores the address of the S-CSCF 326 assigned by the I-CSCF 324 in the process of processing the registration request message, and then a session request message (INVITE) is received from the subscriber station 350. If received, it can be forwarded to S-CSCF 326.

The S-CSCF 326 may register a subscriber with the HSS 326 when the registration request message is received from the I-CSCF 324 and obtain a service profile of the subscriber from the HSS 322. In addition, when receiving the RTR message from the HSS 322, the S-CSCF 326 deregisters the public identifier included in the RTR message.

The I-CSCF 324 serves as a contact point for incoming calls to connect to subscriber stations in the network and a contact point with terminals of other network subscribers roaming in the network. The I-CSCF 324 may obtain an address of the S-CSCF available from the HSS 322 in the subscriber registration process, and may allocate the S-CSCF 326 to be in charge of actual registration with reference to this.

The HSS 322 is a subscriber's master database, which stores and manages profile information, authentication and location related data, and provides information required by the I-CSCF 324 or the S-CSCF 326. In addition, HSS 322 may include the functionality of a Home Location Register (HLR).

On the other hand, the information about the subscriber is mainly provided by the HSS 322, in particular the HSS 322 is information on the public identity associated with a particular subscriber station and the S-CSCF in which the subscriber station is registered Stores identifying information.

At this time, each subscriber station is distinguished by a unique private identity (private identity), for example, can be distinguished in the form of 'UE1@aaa.com'. In addition, the public identifier for a subscriber may be understood as the public address of the subscriber used to perform communication in the IMS system. Accordingly, the public identifier may be expressed in a SIP URI form such as 'sip: pid1@bbb.org' and a TEL URI form of 'tel: 01033331111'.

In the present invention, the public identifiers share a plurality of personal identifiers, in which the HSS 322 sends an RTR message to the S-CSCF 326 in order to unregister the public identifier in the S-CSCF 326, The S-CSCF 326 deregisters the public identifier requested by the HSS 322, and then in response to the RTR message, the S-CSCF 326 sends a Registration-Termination-Answer (RTA) message to the HSS 322. Will be sent.

In this case, the RTR message includes public identifier information to be deregistered, and may be expressed differently according to the first mode or the second mode described above.

First, in the case of the first mode, that is, when deregistering all public identifiers included in a specific personal identifier, a public identifier to be deregistered using 'Associated Private Identity' Attribute Value Pairs (AVP) in an RTR message. Indicates a personal identifier associated with these fields.

For example, in FIG. 2, when deregistering all the public identifiers puid_201 and puid_202 belonging to the personal identifier prid_100, the HSS 322 sets the value of the 'Private Identity' AVP to 'prid_100' and the 'Associated Private Identity' AVP. Also generates an RTR message of 'prid_100' and transmits it to the S-CSCF 326. At this time, the S-CSCF 326 releases the registration of the public identifiers puid_201 and puid_202 belonging to the 'Associated Private Identity' AVP value, and then transmits an RTA message in response to the RTR message to the HSS 322.

Meanwhile, in the first mode, the HSS 322 may extract personal identifiers associated with the public identifiers to be deregistered from its database and include them in the RTR message.

In the case of the second mode, that is, when deregistering a public identifier sharing a plurality of personal identifiers, the public identifiers to be deregistered are indicated by using 'Public Identity' AVP (Attribute Value Pairs) in the RTR message.

For example, in FIG. 2, when the public identifiers sharing the personal identifiers prid_100 and prid_200 are to be deregistered only from puid_201 belonging to prid_200, the HSS 322 sets the value of the 'Private Identity' AVP to 'prid_200', An RTR message having a value of 'identity' AVP as 'puid_201' is generated and transmitted to the S-CSCF 326. At this time, the S-CSCF 326 deregisters the public identifier puid_201 belonging to the 'Public Identity' AVP value, and then transmits an RTA message in response to the RTR message to the HSS 322. At this time, when the HSS 322 wants to deregister the 'puid_201' as the public identifier belonging to the personal identifier 'prid_100', the value of the 'Private Identity' AVP may be set to 'prid_100'.

Also, in the second mode, when it is desired to deregister a plurality of public identifiers belonging to a specific personal identifier, the plurality of public identifiers to be deregistered are displayed on the 'Public Identity' AVP.

Refer to 3GPP TS29.229 V7.5.0 for the AVP described in the above-described RTR message.

Meanwhile, although P-CSCF 318, I-CSCF 324, S-CSCF 326, and HSS 322 are shown one by one in FIG. 3, this is for explaining the basic configuration of the IMS. It is not limited. Accordingly, the IMS may include a plurality of devices or servers shown in FIG. 3. In addition, although not shown in FIG. 3, the subscriber station 350 may be a mobile communication network such as Code Division Multiple Access (CDMA), Wideband CDMA (WCDMA), Global System for Mobile communication (GSM), or a Public Switched Telephone Network (PSTN). It may be connected to the IMS through a wired communication network such as an ISDN (Integrated Services Digital Network), or other known communication network. In this case, it will be apparent to those skilled in the art that network elements constituting the visited network 310 may also be changed in correspondence with the corresponding communication network.

4 is a diagram illustrating call processing when a request for processing a public identifier from an HSS occurs according to another embodiment of the present invention.

First, when an event occurs that deregisters the public identifier for the subscriber station 350 from the HSS 322, the HSS 322 generates an RTR message in the first mode or the second mode according to the present invention to generate the S- message. The processor transmits to the CSCF 320 (S410).

As soon as the S-CSCF 326 receives the generated RTR message, the S-CSCF 326 requests 'NOTIFY' to the subscriber station 350 via the P-CSCF 318 to inform the subscriber station 350 that the public identifier is deregistered. The message is transmitted (S412, S414).

The subscriber station 350 transmits a '200 OK' response message to the S-CSCF 326 via the P-CSCF 318 in response to the 'NOTIFY' request message (S416 and S418).

Receiving the '200 OK' response message from the P-CSCF 318, the S-CSCF 326 sends a 'NOTIFY' message to the P-CSCF 318 to inform that the public identifier of the subscriber station 350 is unregistered. The request message is transmitted (S420), and correspondingly, the P-CSCF 318 transmits a '200 OK' response message to the S-CSCF 326 (S422).

The S-CSCF 326 receives the '200 OK' response message from the P-CSCF 318 and then transmits an RTA response message for the RTR message received from the HSS 322 to the HSS 322 in step S410. It is made (S424).

5 is a diagram illustrating call processing when a request for processing a public identifier from an S-CSCF occurs according to another embodiment of the present invention.

First, when an event occurs that deregisters the public identifier for the subscriber station 350 from the S-CSCF 326, the S-CSCF 326 informs the subscriber station 350 that the public identifier is deregistered. In order to transmit the 'NOTIFY' request message to the subscriber station 350 via the P-CSCF 318 (S510 and S512).

The subscriber station 350 transmits a '200 OK' response message to the S-CSCF 326 via the P-CSCF 318 in response to the 'NOTIFY' request message (S514 and S516).

Receiving the '200 OK' response message from the P-CSCF 318, the S-CSCF 326 sends a 'NOTIFY' message to the P-CSCF 318 to inform that the public identifier of the subscriber station 350 is unregistered. The request message is transmitted (S518), and correspondingly, the P-CSCF 318 transmits a '200 OK' response message to the S-CSCF 326 (S520).

The S-CSCF 326 then informs the HSS 322 that the subscriber's public identifier for the event that has occurred is unregistered, at which time the HSS 322 responds to a request from the S-CSCF 326. Accordingly, the location information of the S-CSCF for the subscriber is deleted or maintained (S522). If the location information of the S-CSCF is deleted from the HSS 322, the public identifier of the corresponding subscriber is stored in the HSS 322 and the S-CSCF 326 as not registered. In this case, the S-CSCF 326 transfers the personal identifiers associated with the public identifiers to be deregistered to the HSS 322 in the first mode according to the present invention, and the plurality of personal identifiers in the second mode. At least one public identifier and a corresponding personal identifier sharing a may be delivered to the HSS 322.

Although one embodiment of the present invention has been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains should be embodied in other specific forms without changing the technical spirit or essential features of the present invention. I can understand that you can. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1 illustrates the structure of a conventional personal identifier-public identifier in an IMS environment.

2 is a diagram illustrating a structure of a personal identifier-public identifier according to the present invention in an IMS environment.

3 is a diagram illustrating a public identifier processing system according to an embodiment of the present invention.

4 is a diagram illustrating call processing when a request for processing a public identifier from an HSS occurs according to another embodiment of the present invention.

5 is a diagram illustrating call processing when a request for processing a public identifier from an S-CSCF occurs according to another embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

350: subscriber station, 312: RNA

314: SGSN, 316: GGSN

318: P-CSCF, 322: HSS

324: I-CSCF, 326: S-CSCF

Claims (12)

Call processing for subscribers having a plurality of personal identifiers and a plurality of public identifiers corresponding to the individual identifiers, and a method for processing public identifiers in an Internet protocol multimedia subsystem in which a home subscriber server and a call session control device are interworked. In (A) extracting a personal identifier associated with the public identifiers to be deregistered; (B) generating a deregistration request message including the extracted personal identifier; And (C) transmitting the generated deregistration request message to the call session control device, And disassociate all public identifiers belonging to the personal identifier by the deregistration request message. The method of claim 1, The deregistration request message is a Registration-Termination-Request (RTR) message defined in 3GPP standards. The method of claim 1, The personal identifier is represented by a value of 'Associated Private Identity' AVP in a Registration-Termination-Request (RTR) message defined in 3GPP standards. Call processing for subscribers having a plurality of personal identifiers and a plurality of public identifiers corresponding to the individual identifiers, and a method for processing public identifiers in an Internet protocol multimedia subsystem in which a home subscriber server and a call session control device are interworked. In (A) generating a deregistration request message that includes at least one public identifier to deregister; And (B) transmitting the generated deregistration request message to the call session control device. The at least one public identifier shares a plurality of personal identifiers, And registering the at least one public identifier with the deregistration request message. The method of claim 4, wherein Wherein the at least one public identifier is indicated by a value of 'Public Identity' AVP in the RTR message, and the personal identifier is indicated by a value of 'Private Identity' AVP in the RTR message. A system for processing a public identifier in an Internet protocol multimedia subsystem environment capable of call processing for a subscriber having a plurality of personal identifiers and a plurality of public identifiers corresponding to each individual identifier, A home that generates and transmits a deregistration request message according to a first mode for deregistering all public identifiers belonging to a personal identifier or a second mode for deregistering at least one or more public identifiers sharing a plurality of personal identifiers. Subscriber server; And And a call session control device for receiving the transmitted deregistration request message and deregistering a corresponding public identifier according to the first mode or the second mode. The method of claim 6, The deregistration request message is an RTR message defined in 3GPP standard. The method of claim 7, wherein In the first mode, the personal identifier is represented by a value of 'Associated Private Identity' AVP in the RTR message. The method of claim 7, wherein In the first mode, the at least one public identifier is indicated by a value of 'Public Identity' AVP in the RTR message, and the shared personal identifier is indicated by a value of 'Private Identity' AVP in the RTR message, Public identifier processing system. The method of claim 6, And the call session control device transmits a response message corresponding to the received deregistration request message to the home subscriber server. The method of claim 10, And the response message is a Registration-Termination-Answer (RTA) message defined in the 3GPP standard. The method of claim 6, The call session control device is a serving call session control function (S-CSCF), public identifier processing system.

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