KR100402787B1 - Call Setup Method for Video Telephony Service in mobile radio communication network - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a call setup method for a video telephone service in a mobile communication network.

2. The technical problem to be solved by the invention

The present invention provides a mobile communication network that allows a user to quickly and quickly set up a call for a video telephone service using a telephone number between mobile terminals using different protocols by establishing a common video telephone database for mobile terminals having different protocols. The purpose of the present invention is to provide a computer-readable recording medium recording a call setup method for a video telephone service and a program for realizing the method.

3. Summary of the Solution of the Invention

The present invention provides a call setup method for a video telephone service applied to a mobile communication system, comprising: receiving caller / caller information from a caller's mobile terminal and searching a common video call database using the received caller / caller information. A first step of making; A second step of confirming whether the caller and the called party have the same type of call processing protocol registered for the caller if both the caller and the called party are registered with the video call service; If the call processing protocol registered for the caller and the called party is the same as a result of the checking of the second step, call setting is directly performed between the caller's mobile terminal and the called party's mobile terminal, and for the caller and the called party, A third step of performing call setup between the caller's mobile terminal and the called party's mobile terminal through a network interworking device (IWF) if the registered call processing protocols are different; And a fourth step of transmitting a video call service rejection message to the caller's mobile terminal if at least one of the caller and the called party is not registered in the video call service as a result of the search of the first step.

4. Important uses of the invention

The present invention is used for video telephony services in mobile communication networks.

Description

Call setup method for video telephony service in mobile radio communication network

The present invention relates to a call setup method for a video telephony service in a mobile communication network, and more particularly, by establishing a common video telephony database for mobile terminals having different protocols, using a telephone number between mobile terminals using different protocols. A call setup method for a video telephony service in a mobile communication network, which allows a call setup for a telephone service to be carried out quickly and quickly, and a computer-readable recording medium having recorded thereon a program for realizing the method.

Currently, video telephony services mainly used on the Internet use H.225, H.225, H.245, or Session Initiation Protocol (SIP) / Session Description Protocol (SDP) as call processing protocols. Here, H.323 is a set of protocols standardized by the ITU, and SIP / SDP is a protocol standardized by the IETF.

Each user identifier is used for H.323 and SIP / SDP.

User identifiers in H.323 are called alias addresses, and there are various types of IP addresses, numbers, URLs, and e-mails.

On the other hand, the user identifier of the SIP is called a SIP address, and has a SIP-URL form in which "sip:" is added before the URL. For example, it has a form such as "sip: jkprk@sktelecom.com", where "jkpark" represents subscriber information and "sktelecom.com" represents host information.

Nowadays, the demand and necessity of the video telephone service through the mobile terminal is increasing. Since the mobile communication network uses the telephone number as the user identifier, in order to enable the video telephone service using the mobile terminal in such a mobile communication network, the mobile terminal Based on the telephone number of the video call service is required to be made. In other words, it is required to use the mobile phone number as the user identifier regardless of which protocol is used, H.323 or SIP / SDP.

In addition, if the subscriber subscribes only to the video call service, it is required to provide an easy interface for the subscriber so that the subscriber can use the video call service without knowing which protocol is used, H.323 or SIP / SDP.

If a subscriber database for a video telephony service is constructed and operated separately for each call processing protocol such as H.323 and SIP / SDP, it is difficult to interwork due to different protocols. There will be a problem that a complicated call processing process is required to enable a video telephone service between mobile terminals to be used.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and by using a telephone number between mobile terminals using different protocols by establishing a common video telephone database for mobile terminals having different protocols. An object of the present invention is to provide a call setting method for a video telephony service in a mobile communication network and a computer readable recording medium storing a program for realizing the method.

1 is a configuration diagram of an embodiment of a mobile communication system for a video telephone service to which the present invention is applied.

2 is a flowchart of an embodiment of a method for registering an H.323 mobile terminal in a common video telephone database applied to the present invention.

3 is a flowchart illustrating a method for registering a SIP mobile terminal in a common video telephone database applied to the present invention.

4 is a flow chart of an embodiment of a call setup method for a video telephone service when an H.323 mobile terminal originates according to the present invention.

5 is a flowchart illustrating a method for setting up a call for a video call service when a SIP mobile terminal according to the present invention originates.

* Explanation of symbols on the main parts of the drawing

10: subscriber 12: common videophone database

14: H.323 gatekeeper (GK) 16: network interlocking device (IWF)

18: SIP server

The present invention for achieving the above object, in a call setup method for a video telephone service applied to a mobile communication system, receiving caller / caller information from the mobile terminal of the caller, using the received caller / caller information A first step of retrieving a common videophone database; A second step of confirming whether the caller and the called party have the same type of call processing protocol registered for the caller if both the caller and the called party are registered with the video call service; If the call processing protocol registered for the caller and the called party is the same as the result of the second step, the call setup is directly performed between the caller's mobile terminal and the called party's mobile terminal, and the caller and the called party A third step of performing call setup between the caller's mobile terminal and the called party's mobile terminal through a network interworking device (IWF) if the registered call processing protocols are different; And a fourth step of transmitting a video call denial message to the caller's mobile terminal if at least one of the caller and the called party is not registered in the video call service.

On the other hand, the present invention, in order to set up a call for a video telephone service in a mobile communication network, a mobile communication system having a processor, receives the caller / caller information from the mobile terminal of the sender, and receives the received caller / caller information A first function of retrieving a common videophone database by using; A second function of confirming that the type of a call processing protocol registered for the caller and the called party is the same, if both the caller and the called party are registered with the video telephone service as a result of the search of the first function; As a result of confirming the second function, if the call processing protocol registered for the caller and the called party is the same, call setting is performed directly between the caller's mobile terminal and the called party's mobile terminal, and the caller and the called party A third function of performing call establishment between the caller's mobile terminal and the called party's mobile terminal through a network interworking device (IWF) if the registered call processing protocols are different; And a fourth function of transmitting a video telephone service rejection message to the caller's mobile terminal if at least one of the caller and the called party is not registered with the video telephone service as a result of the search of the first function. Provide a computer readable recording medium having recorded thereon.

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

1 is a configuration diagram of an embodiment of a mobile communication system for a video telephone service to which the present invention is applied.

The present invention relates to a method for simultaneously supporting a mobile terminal using H.323 and a mobile terminal using SIP and enabling video telephony between mobile terminals using different protocols in a mobile communication network.

If the common video phone DB 12 is established in the mobile communication network and the database is shared, both the H.323 network and the SIP network can be accessed. You don't need to know whether you are using SIP, or on which network, you just make a video call using the mobile phone number.

The alias address supported by H.323 is used to support mobile phone numbers, and the Session Initiation Protocol (SIP) uses subscriber information to support mobile phone numbers.

For example, if the subscriber's telephone number is "011-123-4567", the subscriber's H.323 alias address is used in the form of "0111234567" or "0111234567@sktelecom.com", and the SIP address is "sip." : 0111234567@sktelecom.com ", the subscriber makes a call through the mobile terminal number of the other party.

The common videophone database 12 is a database related to the videophone service, and the subscriber's profile is generated when the subscriber subscribes to the videophone service. The common videophone database 12 includes information on the subscriber's telephone number, the IP address of the subscriber's mobile terminal, the subscriber's H.323 / SIP registration (subscriber's registration of the videophone service, and the call processing protocol type for the subscriber). Stored.

The common videophone DB 12 interworks with the SIP server 18 and the H.323 gate keeper (GK) 14 and registers the subscriber 10 with the SIP network or the H.323 network. Enter the network into the subscriber profile. This subscriber profile distinguishes whether a subscriber registers with a SIP network or with an H.323 network.

When originating from an H.323 network, the H.323 gatekeeper (GK) 14 queries the common videophone DB 12 with the number of the called mobile terminal, and whether the called mobile terminal is registered or not is registered. Know and relay signaling. At this time, if the terminating mobile terminal is registered with SIP, signaling is performed to Inter-Working Functions (IWF) 16, and if the terminating mobile terminal is registered in H.323, another H.323 gatekeeper (GK) is used. I signal to the mobile terminal.

On the other hand, when originating from a SIP network, the SIP server 18 queries the video telephone DB with the number of the called mobile terminal, knows whether the called mobile terminal is registered and the registered network, and relays the signaling. At this time, if the incoming mobile terminal is registered in H.323, it is signaled to the IWF 16, and if it is registered in SIP, it is signaled to another SIP server or mobile terminal.

2 is a flowchart illustrating a method for registering an H.323 mobile terminal in a common video telephone database to which the present invention is applied.

After establishing a traffic channel with a base station controller (BSC), the H.323 mobile terminal establishes a traffic channel (201), and then a packet data service node (PDSN) and a point-to-point communication protocol (PPP). Point Protocol) is set (202). At this time, it informs that the mobile IP (Mobile IP) service will be used.

The PDSN advertises the agent in the H.323 mobile terminal (203), and the H.323 mobile terminal requests the PDSN to register the mobile IP (204).

Then, the PDSN requests authentication from an authentication / authorization / accounting server (AAA Server) (hereinafter referred to as an AAA server) (205), and the AAA server responds to the PDSN in response to the authentication request. (206).

Thereafter, when the PDSN forwards the mobile IP registration request message to the home agent (HA) (207), the home agent (HA) forwards the mobile IP registration response message to the PDSN (208). The PDSN then forwards the Mobile IP Registration Response message to the H.323 mobile terminal (209).

If the H.323 mobile terminal receiving the mobile IP registration response message requests the H.323 registration to the H.323 gatekeeper (210), the gatekeeper registers the H.323 mobile terminal to the common videophone DB. Inform (211).

Thereafter, when the common video telephone DB notifies that the H.323 gatekeeper is registered (212), the gatekeeper confirms H.323 registration to the mobile terminal (213).

3 is a flowchart illustrating a method for registering a SIP mobile terminal in a common video telephone database to which the present invention is applied.

After establishing the traffic channel with the BSC (301), the SIP mobile station establishes the PDSN and the PPP (302). At this time, inform the mobile IP service.

The PDSN makes an agent advertisement in the SIP mobile terminal (303), and the SIP mobile terminal requires the PDSN to register the mobile IP (304).

The PDSN then requests authentication from the AAA server (305), and the AAA server responds to the PDSN with the authentication request (306).

Thereafter, when the PDSN delivers the mobile IP registration request message to the home agent HA (307), the home agent HA transmits the mobile IP registration response message to the PDSN (308). The PDSN then delivers the mobile IP registration response message to the SIP mobile terminal (309).

When the SIP mobile terminal receiving the mobile IP registration response message requests SIP registration from the SIP server (310), the SIP server notifies the SIP mobile terminal of the SIP registration to the common videophone DB (311).

Thereafter, when the common videophone DB informs the SIP server of the SIP registration of the SIP mobile terminal (312), the SIP server transmits the SIP registration to the SIP mobile terminal (313).

4 is a flowchart illustrating a call setup method for a video telephone service when the H.323 mobile terminal according to the present invention originates.

When the mobile terminal transmits an approval request message for the video telephone service to the H.323 gatekeeper (GK) to set up the video telephone call (401), the H.323 gatekeeper transmits the caller and the called party to the common video telephone DB. A confirmation of registration of a videophone service is requested (402).

Then, the common video phone DB checks whether the caller / recipient registers the video phone service and transmits the verification result to the H.323 gatekeeper (403). Here, the caller / recipient's registration of the video call service is performed using the phone number of the caller / receiver's mobile terminal.

The H.323 gatekeeper sends an acknowledgment message to the calling mobile terminal if both the caller and the called party are H.323 registered, or the caller is H.323 registered and the called party is SIP registered, depending on the received confirmation result. Transmit (404).

On the other hand, if the caller is not H.323 registered, or if the caller is H.323 registered but the called party is not both H.323 registered and SIP registered, the H.323 gatekeeper will return an error value to the calling mobile terminal. Reject the approval (405).

When the mobile terminal receives the acknowledgment message, it transmits a call setup request message to the H.323 gatekeeper (406).

The H.323 gatekeeper then checks the type of call processing protocol registered for the called party (407), and if the called party is registered for SIP, sends a call setup request message to the IWF (408). If the H.323 is registered, the call setup request message is transmitted to the called mobile station (409). That is, if the call processing protocols supported by the calling party's mobile terminal and the call processing protocols supported by the called party's mobile terminal are the same, the call setup is directly performed between the sender's mobile terminal and the called party's mobile terminal (i.e., not through the network interworking device). On the other hand, if the call processing protocol supported by the sender's mobile terminal and the call processing protocol supported by the called party's mobile terminal are different, the call setup is performed between the caller's mobile terminal and the called party's mobile terminal through the network interworking device (IWF). do. Here, the call setup is made using the IP address for the caller / recipient mobile terminal stored in the common videophone database.

According to the above process, a video call is set up, and a video call is made between the caller and the called party.

5 is a flowchart illustrating a call setup method for a video telephone service when a SIP mobile terminal according to the present invention originates.

When the mobile terminal sends an Invite Message to the SIP server to set up a call for the video telephone service (501), the SIP server checks whether the caller / recipient registers the video telephone service to the common video telephone DB. 502 is required.

Then, the common video telephone DB checks whether the caller / recipient registers the video telephone service and transmits the verification result to the SIP server (503). Here, the caller / recipient's registration of the video call service is performed using the phone number of the caller / receiver's mobile terminal.

If the caller is not registered with SIP or the caller is registered with SIP but the called party is not registered with both H.323 and SIP, the SIP server sends the corresponding error value to the calling mobile terminal. Respond to the invitation message (504).

On the other hand, if both the sender and the called party are registered in SIP, or the caller is registered in SIP and the called party is registered in H.323, the SIP server performs the following process without responding to the calling mobile terminal.

The SIP server checks the type of call processing protocol registered for the called party (505). If the called party is registered with H.323, the SIP server sends a call setup request message to the IWF (506). If so, the message is sent to the called mobile terminal (507). That is, if the call processing protocols supported by the calling party's mobile terminal and the call processing protocols supported by the called party's mobile terminal are the same, the call setup is directly performed between the sender's mobile terminal and the called party's mobile terminal (i.e., not through the network interworking device). On the other hand, if the call processing protocol supported by the sender's mobile terminal and the call processing protocol supported by the called party's mobile terminal are different, the call setup is performed between the caller's mobile terminal and the called party's mobile terminal through the network interworking device (IWF). do. Here, the call setup is made using the IP address for the caller / recipient mobile terminal stored in the common videophone database.

According to the above process, a video call is set up, and a video call is made between the caller and the called party.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited by the drawings.

As described above, the present invention has an effect of allowing a subscriber to use a video telephone with a number of a mobile terminal by subscribing to a video telephone service through a simple call setup process using a common video telephone database.

In addition, the present invention has an effect of enabling a video call by recognizing in a network, regardless of which protocol the subscriber mobile terminal uses H.323 or SIP / SDP by using a common video call database.

In addition, the present invention has the effect of providing a video service through the protocol conversion by the network interworking device (IWF) in the network, if the source and destination mobile terminals use different protocols.

In addition, the present invention has an effect that the subscriber can make a video call through the registered network (i.e., SIP network or H.323 network) regardless of which protocol the calling subscriber uses.

Claims (6)

A call setting method for a video telephone service applied to a mobile communication system, A first step of receiving caller / caller information from a caller's mobile terminal and searching a common videophone database using the received caller / caller information; A second step of confirming whether the caller and the called party have the same type of call processing protocol registered for the caller if both the caller and the called party are registered with the video call service; If the call processing protocol registered for the caller and the called party is the same as the result of the second step, the call setup is directly performed between the caller's mobile terminal and the called party's mobile terminal, and the caller and the called party A third step of performing call setup between the caller's mobile terminal and the called party's mobile terminal through a network interworking device (IWF) if the registered call processing protocols are different; And A fourth step of transmitting a video call denial message to a mobile terminal of the caller if at least one of the caller and the called party is not registered with the video call service as a result of the search of the first step; Call setup method for a video call service in a mobile communication network comprising a. The method of claim 1, The caller / recipient information of the first step is And a phone number of the mobile terminal of the caller / recipient. The method of claim 1, The common video telephone database of the first step is A video telephone service in a mobile communication network, which stores information on a subscriber's telephone number, an Internet Protocol (IP) address of a subscriber's mobile terminal, whether the subscriber registers a video telephone service, and a call processing protocol type for the subscriber. How to set up calls for The method according to any one of claims 1 to 3, The call processing protocol of the second step, A call setup method for a video telephony service in a mobile communication network, comprising "H.323" and a Session Initiation Protocol (SIP). The method of claim 4, wherein The call setting in the third step is Call setup method for a video telephone service in a mobile communication network, characterized in that stored in the common video telephone database to perform a call setup using the Internet Protocol (IP) address of the mobile terminal of the caller / called party. In a mobile communication system having a processor for setting up a call for a video telephone service in a mobile communication network, A first function of receiving caller / caller information from a caller's mobile terminal and searching a common videophone database using the received caller / caller information; A second function of confirming that the type of a call processing protocol registered for the caller and the called party is the same, if both the caller and the called party are registered with the video telephone service as a result of the search of the first function; As a result of confirming the second function, if the call processing protocol registered for the caller and the called party is the same, call setting is performed directly between the caller's mobile terminal and the called party's mobile terminal, and the caller and the called party A third function of performing call establishment between the caller's mobile terminal and the called party's mobile terminal through a network interworking device (IWF) if the registered call processing protocols are different; And A fourth function of transmitting a video call service rejection message to the mobile terminal of the caller if at least one of the caller and the called party is not registered with the video call service as a result of the search of the first function; A computer-readable recording medium having recorded thereon a program for realizing this.