KR20100060422A - Method and system for controlling of message routing - Google Patents

Abstract

PURPOSE: A method and a system for controlling message routing are provided to normally route in-bounded or out-bounded messages, thereby easily grasping session information. CONSTITUTION: A call session controller(110) receives the first SIP(Session Initiation Protocol) message from another company IMS(IP Multimedia Subsystem) network. The call session controller inserts reply route information into the first SIP message. An application server(130) extracts the reply route information from the first SIP message. The application server generates the second SIP message corresponding to the first SIP message. The application server transmits the second SIP message to the call session controller through the reply route information.

Description

Method and system for controlling of message routing

The present invention relates to mobile communication, and more particularly, to a method and apparatus for interworking with a third party communication network to control routing of a message.

In recent years, a voice or video call service can be provided using a wireless packet switching network such as a packet network for data communication as well as a wireless communication service using a circuit switched network. Voice / video communication technology using a wireless packet-switched network called Voice over Internet Protocol (VoIP) is currently being developed and researched due to the advantages that it can be used simultaneously by multiple users through a cable, it is scalable, and the cost is much lower than that of a conventional telephone. It is becoming. Commonly used protocols in VoIP include H.323, SIP, MGCP and MEGACO.

Currently, not only Korea, but also many other countries have mixed circuit switching networks such as WCDMA, CDMA, GSM, and packet switching networks, so interworking with each network may be an important issue to provide smooth call services. However, at present, there is a problem in that messages cannot be normally routed (ie, returned) in interworking between different communication networks.

The present invention is to provide a method and apparatus for controlling routing of messages inbound or outbound in conjunction with a third-party communication network.

In addition, the present invention is to provide a method and apparatus for interrogating messages that are inbound or outbound by interworking with a third party communication network to normally route session messages and to control routing of messages that can be charged for an ongoing call. .

According to an aspect of the present invention, a system and apparatus for interworking with a third party IMS network to control routing of a message are provided.

According to an embodiment of the present invention, in a system interoperating with a third-party IMS network to control routing of a message, a first SIP message is received from the third-party IMS network, and reply path information is inserted into the first SIP message. Call session control device for transmitting by; And extracting the reply path information from the first SIP message, generating a second SIP message corresponding to the first SIP message, and converting the second SIP message to the call session control device using the reply path information. Including a transmitting application server, wherein the second SIP message may be provided to the message routing control system, characterized in that transmitted to the third party IMS network through the call session control device.

According to another embodiment of the present invention, in the call session control device for controlling the routing of messages inbound or outbound in conjunction with a third-party IMS network and its application server providing any service, from the third-party IMS network A communication unit receiving a first SIP message; A message changer for inserting connection information of the call session control device as reply path information into a route header of the first SIP message; And a controller for transmitting the first SIP message with the reply path information inserted through the communication unit.

According to another aspect of the present invention, there is provided a method for controlling routing to a message in connection with a third party IMS network in a system including a call session control device and an application server.

According to an embodiment of the present invention, in a system including a call session control device and an application server, interworking with a third party IMS network to control routing of a message, the call session control device receives a first SIP message step; Inserting, by the call session controller, reply path information to the call session controller, into the first SIP message and transmitting the information; Generating, by the application server, a second SIP message corresponding to the first SIP message; The application server extracting the reply path information from the first SIP message; And inserting, by the application server, the reply path information into the second SIP message and transmitting the message routing control method.

The present invention can control routing of a message that is inbound or outbound by interworking with a third-party communication network.

In addition, the present invention has the advantage that it is easy to grasp the session information by allowing the inbound or outbound message is normally routed in conjunction with the third-party communication network, it is possible to charge for the ongoing call.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

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

Hereinafter, it will be described on the assumption that the first communication network is its own communication network, and the second communication network will be described on the assumption that it is a third party communication network.

1 is a configuration diagram schematically showing the structure of an IMS network according to an embodiment of the present invention. 1, an IMS network according to an embodiment of the present invention is a call session control apparatus (CSCF: call session control function, hereinafter referred to as' CSCF ') 110, a home subscriber server, hereinafter' HSS 120) and the application server 130.

The IMS network is a communication network based on the communication network standard proposed by the 3rd generation partnership project (3GPP). The IMS network provides an IP (Internet protocol) based communication service and mainly uses a SIP (session initiation protocol) signaling protocol. The IMS network can be used as a secondary network of a mobile communication network such as WCDMA.

The CSCF 110 performs a function related to call processing in the IMS network. The CSCF 110 includes a call control module (CCF: call control function, hereinafter referred to as 'CCF'), a serving profile database (SPD), and an address handling module (AH: address). handling, hereinafter referred to as 'AH').

The CCF is responsible for call setup, termination, and status / event management, call event reporting for billing, and reception and processing of application level registrations. The SPD communicates with the HSS of the home domain to manage user profile information and performs a similar function to the VLR of the existing network that informs the home domain of the user's first access. AH performs the functions of analyzing, translating, and modifying addresses, and provides address mobility.

CSCF 110 performs different functions depending on the network in which the subscriber is located and based on its location and function, proxy-CSCF (P-CSCF), interrogating-CSCF (I-CSCF), and serving-CSCF (S-CSCF). Logically separated by

P-CSCF is a SIP proxy server that is the first connection point for the terminal 140 in the IMS network. P-CSCF resides in home or visited networks. The terminal needs to acquire P-CSCF location information to be connected, which is obtained through a dynamic host configuration protocol (DHCP) or a PDP context activation (PDP context activation) procedure. The P-CSCF is assigned to the terminal upon registration in the IMS network and does not change during the registration period. In addition, the P-CSCF performs policy control, band management, and quality of service (QoS) control. The P-CSCF is included in the path of all signaling messages and checks all messages. The P-CSCF also authenticates the user and establishes an IP sec security association with the terminal. This prevents spoofing attacks, replay attacks, and protects user privacy. P-CSCF compresses or decompresses SIP messages using SigComp (signaling compression). This can reduce the round-trip of the radio link. The P-CSCF generates a charging record (CDR).

I-CSCF is located at the boundary of the management domain if no border function exists. Therefore, the IP address is published in the DNS of the domain so that servers in other domains can find the I-CSCF and use it as the input node of the network. The I-CSCF uses the Cx or / and Dx interface to query the HSS for the location of the terminal and forwards the SIP message to the S-CSCF to which the terminal is assigned. When I-CSCF transfers SIP messages between different domains, I-CSCF may not transmit some network information to another domain by performing a topology hiding inter-network gateway (THIG).

The S-CSCF is a central node of the signaling layer and performs session control as one SIP server. S-CSCF is always on the home network and uses the Cx / Dx interface to download user profiles from or upload user profiles to the HSS. The S-CSCF also binds the location of the terminal and the SIP address at the time of SIP registration. S-CSCF is included in the path of all signaling messages and checks all messages. The S-CSCF also determines the server to provide the service and routes the SIP message to the application server.

HSS 120 supports IMS entities that perform session control with a user information database. The HSS 120 stores user related subscription information related to multimedia session control, that is, user location information, security information for authentication and permission of the user, and user profile information including a service subscribed to by the user.

The application server 130 interfaces with the CSCF 110 using the SIP message. The application server 130 provides a wireless Internet service to a terminal connected to the IMS network.

The terminal 140 is a terminal capable of processing session initiation protocol (SIP) signaling. The terminal 140 may be equally applicable to all communication devices capable of performing IP-based communication, such as a mobile communication terminal and a PDA.

2 is a flowchart illustrating a method of controlling routing of a message in connection with a third-party communication network according to an embodiment of the present invention, FIG. 3 is a diagram illustrating a part of a first SIP message according to the prior art, and FIG. FIG. 5 illustrates a portion of a first SIP message according to an embodiment of the present invention, and FIG. 5 illustrates a portion of a second SIP message according to an embodiment of the present invention. Here, the third party communication network may be, for example, a third party IMS network.

In step 210, the call session control apparatus 110 receives an arbitrary first SIP message (eg, INVITE, SUBSCRIBE, NOTIFY) through a third party communication network. The call session control apparatus 110 is a first entry point for an incoming call from a third party communication network. For this reason, the message is transmitted and received through the call session control device between two or more different domains. In the present specification, the first SIP message is defined as being a SIP message inbound to the call session control apparatus 110 through a third party communication network (eg, a third party IMS network). In the following description, it is assumed that the first SIP message is a SUBSCRIBE message in order to facilitate understanding and explanation.

In step 215, the call session control device 110 analyzes the first SIP message. The call session controller 110 inserts the access information to the call session controller 110 into the route header (RECORD-ROUTE HEADER) of the first SIP message as the reply path information. 4 illustrates a first SIP message in which access information is inserted into a route header as return path information. 3 illustrates a first SIP message according to the prior art.

In operation 220, the call session control apparatus 110 transmits the first SIP message, to which the reply path information is inserted, to the application server 130.

In more detail, the call session control apparatus 110 transmits the first SIP message to a service capability manage (SCIM) (not shown) included in the first SIP message. The service control device interworks with the application server 130 to control a service provided by the application server 130. Accordingly, the call session control device 110 may transmit the first SIP message to the service control device (SCIM), and the service control device may transmit the first SIP message to the application server 130.

In operation 225, the application server 130 analyzes the first SIP message to extract reply path information. That is, the application server 130 may extract the reply path information from the route header of the first SIP message.

In operation 230, the application server 130 generates a second SIP message corresponding to the first SIP message. Here, the second SIP message is a message outbound to the third party communication network in response to the first SIP message. For example, assuming that the first SIP message is a SUBSCRIBE message, the second SIP message may be a NOTIFY message. A simple acknowledgment message (ACK) or a simple negative response message corresponding to the first SIP message is not included in the second SIP message.

In operation 235, the application server 130 inserts the extracted reply path information into the second SIP information and transmits it. For example, the application server 130 may insert the reply path information into the route header of the second SIP message and transmit it. In more detail, the extracted return path information may include access information about the call session control apparatus 110 and the service control apparatus. A portion of the second SIP message including the return path information is illustrated in FIG. 5.

The application server 130 transmits the second SIP message to the service control device. The service control device analyzes the second SIP message, deletes the access information for the service control device, and transmits it to the call session control device 110.

Accordingly, the call session control device 110 may transmit the second SIP message to the third party IMS network.

Conventionally, the call session control device 110 does not have an edit / change function for a message inbound from a third party communication network. For this reason, when the first SIP message is received, the call session control apparatus 110 transmits the information to the application server 130 as it is. The application server 130 receiving the first SIP message analyzes the route header of the first SIP message and sets a path for reply and transmits the second SIP message. In this case, since the application server 130 does not include access information to the call session control apparatus 110 in the second SIP message, the application server 130 directly transmits the second SIP message to the third party communication network. However, as described above, message transmission and reception between a plurality of different domains must be performed through the call session control device 110. That is, since the third party communication network and the company communication network are interworked through the call session control apparatus 110, there is a problem that the message transmitted from the application server 130 cannot be normally transmitted to the third party communication network.

6 is a block diagram illustrating an internal configuration of a call session control apparatus according to an embodiment of the present invention.

Referring to FIG. 6, a call session control apparatus 110 according to an embodiment of the present invention includes a communication unit 610, a message converter 620, a storage unit 630, and a controller 640.

The communication unit 610 receives an inbound first SIP message (eg, INVITE, SUBSCRIBE, NOTITY) from a third party communication network. In addition, the communication unit 610 transmits a second SIP message (for example, notify) including state information on a service corresponding to the first SIP message under the control of the control unit 640.

The first SIP message is a message requesting any service provided by the application server 130 of the company's communication network. The first SIP message is an inbound message through a third party communication network, and the second SIP message is a message for a service corresponding to the first SIP message. A message containing various status information that is outbound to a third party communication network.

The message conversion unit 620 analyzes the first SIP message and inserts the access address of the call session control apparatus 110 into the first SIP message as the reply path information. Here, the access address may be an IP address or URL.

For example, assume that the access address of the call session control device 110 is "i-cscf.ktfims.com". The message conversion unit 620 sets the access address of the call session control apparatus 110 as the return path information and inserts it into the route header of the first SIP message.

The storage unit 630 stores an algorithm for operating the call session control device 110 according to an embodiment of the present invention, and an access address for the call session control device 110.

The controller 640 controls the internal components of the call session control apparatus 110 (for example, the communication unit 610, the message converter 620, the storage unit 630, etc.) according to an embodiment of the present invention. Perform the function.

In addition, the controller 640 transmits the first SIP message input from the message converter 620 (that is, the first SIP message inserted with the reply path information) to the application server 130 through the communication unit 610.

7 is a block diagram illustrating an internal configuration of an application server according to an embodiment of the present invention.

Referring to FIG. 7, the application server 130 according to the embodiment of the present invention includes a communication unit 710, a message generator 720, a storage unit 730, and a controller 740.

The communication unit 710 receives the first SIP message from the call session control device 110 through a communication network. In addition, the communication unit 710 performs a function of transmitting the second SIP message under the control of the control unit 740.

The message generator 720 analyzes the first SIP message and generates a second SIP message (notify) including state information about a corresponding service. The message generator 720 extracts reply path information by analyzing the first SIP message. In more detail, the message generator 720 may extract reply path information from the route header of the first SIP message. The message generator 720 inserts the extracted reply path information into the route header of the second SIP message.

Suppose that the application server 130 transmits a second SIP message to the call session control device 110 through a service control device (SCIM) that controls a service provided by the application server 130. The application server 130 may insert the extracted reply path information and the access address for the service control device into the route header of the second SIP message, respectively. When the second SIP message is received, the service control device may delete the access address for the service control device from the second SIP message and transmit the deleted address to the call session control device 110. In this specification, it will be described on the assumption that the application server 130 includes a service control device.

In addition, a method of generating a second SIP message corresponding to the first SIP message is obvious to those skilled in the art, and since there is a possibility of blurring the subject matter according to an embodiment of the present invention, a detailed description thereof will be omitted.

The storage unit 730 is an algorithm for operating the application server 130 according to an embodiment of the present invention, various information related to the service provided by the application server 130, service control linked with the application server 130 The access address for the device is stored.

The controller 740 controls the internal components of the application server 130 according to an embodiment of the present invention (eg, the communication unit 710, the message generator 720, the storage unit 730, etc.). Perform.

In addition, the control unit 740 is a second SIP message (reply) input through the message generating unit 720

And transmits the second SIP message including the route information to the call session control apparatus 110 through the communication unit 710.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 is a configuration diagram schematically showing an IMS network structure according to an embodiment of the present invention.

2 is a flowchart illustrating a method for controlling routing of a message in association with a third-party communication network according to an exemplary embodiment of the present invention.

3 illustrates a portion of a first SIP message according to the prior art.

4 illustrates a portion of a first SIP message according to an embodiment of the invention.

5 illustrates a portion of a second SIP message in accordance with an embodiment of the present invention.

6 is a block diagram illustrating an internal configuration of a call session control apparatus according to an embodiment of the present invention.

7 is a block diagram illustrating an internal configuration of an application server according to an embodiment of the present invention.

Claims (10)

In the system to control the routing of messages in conjunction with the third-party IMS network, A call session control device which receives a first SIP message from the third party IMS network and inserts reply path information into the first SIP message and transmits it; And Extracting the reply path information from the first SIP message, generating a second SIP message corresponding to the first SIP message, and transmitting the second SIP message to the call session control device using the reply path information. Include application servers, And the second SIP message is transmitted to the third party IMS network through the call session control device. According to claim 1, And the call session control device inserts and transmits access information about the call session control device into the route header of the service request message as the reply path information. The method of claim 2, The call session control device, A communication unit receiving the first SIP message from the third party IMS network; A message changer for inserting the access address of the call session control device as reply path information into the route header of the second SIP message; And And a control unit for transmitting the first SIP message including the reply path information to the application server through the communication unit. According to claim 1, The application server inserts the reply path information into the route header of the second SIP message and transmits the message. According to claim 1, The application server, A communication unit receiving the first SIP message; Generate a message for analyzing the first SIP message, generating a corresponding second SIP message, extracting the reply path information from the first SIP message, and inserting the extracted reply path information into the second SIP message; part; And And a control unit for transmitting the second SIP message including the reply path information to the call session control device through the communication unit. In the call session control device that controls the routing of inbound or outbound messages in conjunction with a third-party IMS network and its application server that provides any service, A communication unit receiving a first SIP message from the third party IMS network; A message changer for inserting connection information of the call session control device as reply path information into a route header of the first SIP message; And And a control unit for transmitting the first SIP message including the reply path information to the communication unit. The method according to claim 6, The access information is a call session control device, characterized in that the IP address or URL (URL) for the call session control device. In a system including a call session control device and an application server, the method for interworking with a third-party IMS network to control routing of a message, Receiving, by the call session control device, a first SIP message; Inserting, by the call session controller, reply path information to the call session controller, into the first SIP message and transmitting the information; Generating, by the application server, a second SIP message corresponding to the first SIP message; The application server extracting the reply path information from the first SIP message; And And inserting, by the application server, the reply path information into the second SIP message and transmitting the message. The method of claim 8, The first SIP message is a message inbound through the third party IMS network, The first SIP message is a message routing control method, characterized in that the message outbound to the third-party IMS network. The method of claim 8, The reply path information is access information of the call session control device. The access information is a message routing control method, characterized in that the IP address or URL (URL).

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