KR20070036847A - Method of Provisioning Representative Number Service in 3BPPI IMS-based Network - Google Patents

Abstract

The present invention relates to a method for providing a representative number service in a 3GPP IMS based network, comprising: a first step of storing information including REGISTER and INVITE trigger information, name and service information of the AS, as subscriber profile information in the HSS; A second step of registering the group directory number and the individual directory number designated as a representative number using the subscriber profile information in the IMS based network; A third step of sending a call origination request message to the S-CSCF and the AS by the group directory number or the individual directory number attempting to make a call; A fourth step of calling a call to the group directory number and transmitting a call request message to the S-CSCF and the AS; And a fifth step of calling a call to the individual directory number and transmitting a call request message to the S-CSCF and the AS.

Description

A group directory number providing method in network based on 3GPP IMS}

1 is a block diagram showing the configuration of a 3GPP IMS-based network.

2 is a subscriber profile according to the present invention.

3 is a flowchart of a GDN / IDN registration procedure according to the present invention;

4 is a flowchart of an outgoing call processing procedure of a GDN / IDN according to the present invention;

5 is a flowchart of an incoming call processing procedure of a GDN according to the present invention;

6 is a flowchart of an incoming call processing procedure according to the present invention;

The present invention relates to a method for providing a representative number service in a 3GPP IMS-based network. More specifically, when an incoming call is attempted to a subscriber number representing a specific group in a 3GPP IMS-based network, another incoming call belonging to the representative number or group is included. It is to provide a service to call the number.

3GPP stands for 3rd Generation Partnership Project, a new standard for creating, delivering and playing multimedia over high-speed wireless networks. The 3GPP standard provides a new type of multimedia add-on radio and rich multimedia technology through a new, evolved broadband mobile network. Such a multimedia service environment includes an IMS (IP Multimedia Subsystems) based network. IMS-based network is a next-generation core information and communication technology that provides high-speed data transmission by integrating the Internet and wireless mobile communication environment.

The IMS-based network has a problem in that it cannot provide a representative number service provided by the existing Public Switch Telephone Network (PSTN).

Representative number service is to make a specific group, for example, a specific company or group as a group, to be called by using the subscriber number representing the group, when the call is received another number belonging to the representative number or group It is a service to call by using various hunting method as called number.

It is easy to provide the representative number service in the public switched telephone network because it performs fixed line management. All circuits accommodated in the network are in fixed locations. Therefore, the designated group has similarities in the region, so it is convenient to provide the representative number service.

However, the IMS-based network provides an IP-based multimedia service for right and wireless mobile subscribers in a wired / wireless multi-access network environment using an octave switch. There is a problem that the representative number service is not provided in the octave switch.

An object of the present invention for solving the above problems is to provide a representative number service in an environment in which a terminal accesses a network using IP in a 3GPP IMS-based network providing wired and wireless mobility of the terminal.

A method for providing a representative number service in a 3GPP IMS-based network of the present invention for achieving the above object includes: a first storing information including REGISTER and INVITE trigger information and name and service information of the AS as subscriber profile information in the HSS; step; A second step of registering the group directory number and the individual directory number designated as the representative number using the subscriber profile information in the IMS based network; Transmitting a call origination request message to the S-CSCF and the AS by the group directory number or the individual directory number attempting to make a call; A fourth step of transmitting a call request message to the S-CSCF and the AS by requesting a call to the group directory number; And a fifth step of transmitting a call request message to the S-CSCF and the AS by requesting a call to the individual directory number.

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

1 is a block diagram showing the configuration of a 3GPP IMS-based network.

3GPP IMS-based network is composed of a terminal 100, I-CSCF (200), S-CSCF (300), AS (400) and HSS (500).

The terminal 100 is a terminal that provides a multimedia service based on Session Initiation Protocol and corresponds to a GDN or IDN.

The I-CSCF 200 (Interrogating-Call Session Control Function, hereinafter referred to as I-CSCF) is the first point where the terminal 100 accesses a network, and may exist in a single network domain. The I-CSCF 200 receives the address of the S-CSCF 300, which performs SIP registration of the terminal 100, from the HSS 500 and actually performs network registration of the terminal 100. By assigning the address of the router to route the SIP message received from the other network to the S-CSCF (300), and generates a Charge Data Record (CDR).

The S-CSCF 300 (Serving-Call Session Control Function, hereinafter referred to as S-CSCF) is a device for controlling a session of the subscriber terminal 100, acquires and stores subscriber information from the HSS 500, and registers the registered subscriber. By managing and controlling the session state, an operation such as obtaining an I-CSCF 200 address of a called subscriber through a dialed number of the subscriber or a SIP URL is performed.

AS 400 stands for application server and provides services such as instant messaging, presence, local traffic reporting, and conferencing functions over an IMS-based network. The AS 400 resides in or outside the IMS infrastructure. This is outside the IMS infrastructure when the supported services are provided by a third party. In the present invention, the AS 400 is a server providing a representative number service.

The HSS 500 (HSS) stores all subscriber related information in the IMS-based network and communicates with the S-CSCF 300 through an interface called a Cx interface. The Cx interface is a message between the HSS 500 and the S-CSCF 300 to register / unregister subscribers, to verify the accessibility of the subscriber's IMS-based network, and to manage location information. Exchange messages for renewal and subscriber authentication. In some cases, the HSS 500 may include an identifier information storage unit, a security information storage unit, a location information storage unit based on location registration and movement information, a profile information storage unit, and the like.

The representative number service is to designate a plurality of IDNs (Individual Directory Numbers) to one GDN (Group Directory Number), and then, when the GDN is called, select one IDN from a plurality of IDNs and receive the call. . GDN is also a kind of IDN, but a specific IDN registered with a plurality of IDNs becomes a GDN.

The AS 400 for providing the representative number service of the present invention includes the following functions.

The AS 400 selects each IDN for the call connected to the GDN and forwards the call to each IDN. In this process, the IDN selection method that will receive a call is called a hunting method.

Hunting methods include sequential, circular and random methods. The sequential method is a method of sequentially searching for and searching for idle subscribers from the first subscriber in a group.

The circular method lists multiple IDNs as one and starts searching from the first. When a IDN is idle, the call is received. It stores the IDN that received the call and starts searching for the IDN in idle state from the stored location when requesting the next call connection. If the last IDN is searched and the idle IDN is not found, the search restarts from the beginning of the list.

The random method is a method of randomly selecting and searching for IDNs among a plurality of registered IDNs.

In addition, the AS 400 should support the charging method according to the charging type.

There are two types of billing methods: individual billing and representative billing. Individual billing is billed by IDN, and representative billing is GDN, in which the charges of IDN are collectively charged.

In addition, it provides various ways of performing according to the hunting result.

If there is an idle IDN according to the hunting result, the call is forwarded to the corresponding IDN. If there is no idle IDN, the busy tone is transmitted. In addition, if an incoming IDN is attempted but the corresponding IDN is unresponsive, it should provide various execution methods according to the environment setting such as no additional hunting.

The function is defined by the subscriber profile.

2 is a subscriber profile according to the present invention.

In this embodiment, the subscriber profile information will be described using an example in which the GDN uses 15882424 and the IDN uses 0312790001.

The portion of the subscriber profile that sets the type of service and its contents is stored in the ServiceInfo portion of the IFC (InitialFilterCriteria) of the subscriber profile. At this time, service contents are defined by Uniform Resource Indicator (URI), hunting method, billing policy and type.

A URI is a URI of a GDN. A URI is a location similar to a URL, and basically has a SIP or TEL value. URI entries are defined in the RFC3261 standard.

The hunting method may be selected randomly, sequential or circular according to the hunting method supported by the AS (400).

The billing may be selected such as representative or individual billing supported by the AS (400), and in some cases free billing may be selected.

The Type item is used to determine whether the GDN number to receive the representative number service is a special number or a representative number. The special number is a special number designated by the telephone operator to refer to a special telephone number connected to a police station or a fire station.

In addition, the subscriber profile can set whether the representative number is subscribed and the operation at the call or the call by using the register sender trigger and the incoming call trigger. The trigger information is such that the corresponding GDN or IDN is subscribed to the representative number service to prevent the S-CSCF (300) from performing outgoing / incoming call processing, and to be triggered first by the AS 400 providing the subscribed representative number service. It plays a role.

Through the triggering to the AS 400, information and status necessary for providing the representative number service are managed.

The setting contents of the profile are reflected through the subscriber registration procedure.

3 is a flowchart of a GDN / IDN registration procedure according to the present invention.

The registration process is the same with no distinction between GDN and IDN.

The GDN or IDN connected to the IMS-based network attempts to register using the register message.

The register message of the GDN or IDN is delivered to the I-CSCF 200, and the I-CSCF 200 is responsible for registering the GDN or IDN for providing the representative number service from the HSS 500. Obtain the address of.

The I-CSCF 200 transmits a register message of a GDN or IDN to the obtained address of the S-CSCF 300.

The S-CSCF 300 performs a standard authentication procedure defined in the 3GPP IMS based network standard.

S-CSCF 300 accesses HSS 500 and downloads the subscriber profile. The S-CSCF 300 checks the REGISTER trigger information stored in the subscriber profile information. The REGISTER trigger information is information indicating, for example, whether to transmit the contents set in the server name and ServiceInfo of the AS 400 to the AS 400 according to the setting number service according to the representative number service.

The S-CSCF 300 determines the transmission of the REGISTER trigger according to the REGISTER trigger information, and the S-CSCF 300 transmits the corresponding register message to the AS 400.

Thereafter, the AS 400 sets up a service environment using the subscriber profile information.

Outgoing call processing procedure of GDN or IDN according to reflected subscriber profile is as follows.

4 is a flowchart of an outgoing call processing procedure of a GDN / IDN according to the present invention.

The GDN or the IDN attempts to transmit and sends an invite message to the S-CSCF 300. S-CSCF (300) checks the invitation information of the GDN or IDN subscriber profile attempted to send. The S-CSCF 300 transmits an invite message to the AS 400 according to the triggering information. The AS 400 changes the state of the GDN or IDN from idle to busy. The AS 400 sends an invite message back to the S-CSCF 300 so that the S-CSCF 300 performs outgoing call processing defined in the 3GPP IMS standard.

The incoming call processing procedure of GDN based on the reflected subscriber profile is as follows.

5 is a flowchart of an incoming call processing procedure of a GDN according to the present invention.

When an invite message requesting an incoming call to the GDN is transmitted to the S-CSCF 300, the S-CSCF 300 transmits an invite message to the AS 400 according to the invite incoming trigger information. The AS 400 determines whether the corresponding GDN is in an idle state, and when it is idle, changes the state of the GDN from idle to busy. However, if the GDN is busy, the IDN is selected according to the set IDN hunting method. The state of the selected IDN is changed from idle to busy, and the invite message transmitted to the AS 400 is transmitted to the S-CSCF 300 again. The S-CSCF 300 proceeds with call processing using the selected GDN or IDN as the called terminal according to the invite message.

Outgoing call processing procedure of IDN based on reflected subscriber profile is as follows.

6 is a flowchart of an incoming call processing procedure according to the present invention.

When an invite message requesting an incoming IDN is transmitted to the S-CSCF 300, the S-CSCF 300 checks the invite incoming trigger information and transmits an invite message to the AS 400 according to the trigger information. The AS 400 checks the state of the corresponding IDN, and if busy, transmits a busy tone to the terminal that has made a call request and requests execution of a call release procedure. If the state of the IDN is idle, change the state of the IDN to busy, and transmit the invite message to the S-CSCF (300) to perform the call processing procedure.

As described above, the method for providing a representative number service in a 3GPP IMS based network according to the present invention includes a subscriber number service which is not defined in a call processing method of an originating / incoming call which is a standard defined in an existing 3GPP IMS based network. By using the trigger information of the profile to distinguish the terminal that needs to provide the representative number service, bypasses the AS providing the representative number service in the call processing process of the S-CSCF and performs the state management of the terminal required to provide the representative number service As a result, it is effective to provide the representative number service in the 3GPP IMS-based network.

In addition, a preferred embodiment of the present invention is for the purpose of illustration, those skilled in the art will be able to various modifications, changes, replacements and additions through the spirit and scope of the appended claims, such modifications, changes, etc. are the following patents It should be regarded as belonging to the claims.

Claims (6)

Interrogating-Call Session Control Function (I-CSCF), where the group directory number and the individual directory number are first connected to the network, and the S-CSCF (Serving-Call), which registers, calls, and receives the group directory number and the individual directory number. Representative number service in 3GPP IMS (3rd Generation Partnership Project IP Multimedia Subsystem) based network with session control function (AS), application server (AS) performing representative number supplementary service, and home subscriber server (HSS) storing subscriber profile information In the method for providing, A first step of storing information including REGISTER and INVITE trigger information and name and service information of the AS as subscriber profile information in the HSS; A second step of registering the group directory number and the individual directory number designated as the representative number using the subscriber profile information in the IMS based network; Transmitting a call origination request message to the S-CSCF and the AS by the group directory number or the individual directory number attempting to make a call; A fourth step of transmitting a call request message to the S-CSCF and the AS by requesting a call to the group directory number; And And a fifth step of forwarding a call request message to the S-CSCF and the AS by requesting a call to the individual directory number. The method of claim 1, The subscriber profile information includes trigger information for triggering a call request message to the AS before performing a call processing procedure in response to an originating and incoming request in the S-CSCF, name information of the AS providing the representative number service, and the group. And a directory number, the individual directory number information, hunting information, charging policy information, and special service classification information. The method of claim 1, wherein the second step, A first step of performing registration of the group directory number and the individual directory number in the S-CSCF; And And a second process of performing registration of the group directory number and the individual directory number in the AS according to the trigger information of the subscriber profile information. The method of claim 1, wherein the third step, Transmitting, by the S-CSCF, the call origination request message to the AS according to the trigger information of the subscriber profile information; And And a fourth process of performing outgoing call processing in response to the call origination request in the S-CSCF. The method of claim 1, wherein the fourth step, A fifth step of transmitting, by the S-CSCF, the call forwarding request message to the AS according to the trigger information of the subscriber profile information; And And a sixth process of performing an incoming call processing to the group directory number or the individual directory number in the S-CSCF according to the state of busy state of the group directory number. How to Provide Number Services. The method of claim 1, wherein the fifth step, A seventh step of transmitting, at the S-CSCF, the call forwarding request message to the AS according to the trigger information of the subscriber profile information; And And an eighth process of performing an incoming call processing in the S-CSCF according to the state of busy of the individual directory number.

Images