KR100469748B1 - Video call service supporting method in a high rate packet data service - Google Patents

Abstract

A base station controller connected to the terminals, a packet data communication through a packet data service node through a switch system, and data connected to the base station controller through the switch system and storing information and subscriber information of the terminals. Disclosed is a method for providing a video call service in a mobile communication system including a location register of a terminal.

Description

VIDEO CALL SERVICE SUPPORTING METHOD IN A HIGH RATE PACKET DATA SERVICE}

The present invention relates to a mobile communication system, and more particularly, to a method of providing a video call service in a mobile communication system supporting high speed data communication.

In general, a mobile communication system is a communication system for guaranteeing a service such as voice or data when a user moves. In order to guarantee the mobility of the user, the mobile communication system does not connect through a wire, but communicates through a wireless (RF) channel. Such mobile communication systems have evolved from analog communication systems to digital communication systems. The digital communication system has also developed into a second generation mobile communication system that provides cellular services and more advanced PCS mobile communication systems.

As such, the mobile communication system Developed primarily for voice calls, it is gradually being driven by user's desire for data communication. Also, from a service provider's point of view, a method for providing a video call service as a service for meeting the needs of users is being studied.

However, since the mobile communication system is an advanced system based on voice calls, data transmission is limited. That is, there is a problem that high-speed data transfer cannot be performed. Therefore, in order to solve this problem, development of 1x EV-DO (EV-DO), a system for high-speed data transmission, is in progress. The system for high speed data transmission is a system for transmitting only data.

The system for high-speed data transmission is configured differently from the system based on a voice call. Accordingly, there is a need for a method for providing a video call service suitable for a system for high speed data transmission.

Accordingly, an object of the present invention is to provide a video call service method in a mobile communication system for high speed data transmission.

Another object of the present invention is to provide a signaling method for a video call service in a mobile communication system for high speed data transmission.

The present invention to achieve these objects

A base station controller connected to the terminals, a packet data communication through a packet data service node through a switch system, and data connected to the base station controller through the switch system and storing information and subscriber information of the terminals. In a mobile communication system comprising a location register of a terminal, in a video call service providing method,

When the video call service request call is generated from a predetermined terminal, the base station controller transmits a first video call request message including originating / receiving subscriber information to the location register of the data terminal and the location register of the data terminal. 1, upon receiving the image call request message, receiving location information of the called terminal, packet data service node IP address information, and location register IP address information of the called data terminal previously stored in the location register of the predetermined central data terminal; The location register of the terminal transmits a second video call request message including video call service activation information to the location register of the called data terminal, and the location register of the called data terminal receives the second video call request message. The service activation information to the called terminal through a called base station controller; Transmitting, and when the receiving terminal receives the service activation information, setting a video call service application and transmitting the video call activation preparation information to the location register of the terminating data terminal through the terminating base station controller; When the location register of the incoming data terminal receives the activation preparation information, transmitting a first video call activation response message including the activation preparation information to the location register of the data terminal; Receiving a first video call activation response message, transmitting a second video call activation response message including packet data service node IP address information to the base station controller; and the base station controller includes a video call service including service identifier information. Request message is sent to the packet data service node. And receiving a video call service.

The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that those skilled in the art may better understand the detailed description of the invention that follows.

Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. Those skilled in the art should recognize that the disclosed concepts and specific embodiments of the invention may be readily used as a basis for modifying or designing other structures for achieving the same purposes of the present invention. Those skilled in the art should also recognize that structures equivalent to the invention do not depart from the spirit and scope of the broadest form of the invention.

1 is a view showing the configuration of a mobile communication system for high-speed data transmission to which the present invention is applied;

2 is a signal flow diagram illustrating a video communication service providing method according to an embodiment of the present invention;

3 is a signal flow diagram illustrating an outgoing line recovery procedure at the end of a video call service according to an embodiment of the present invention;

4 is a signal flowchart illustrating a call forward recovery procedure at the end of a video call service according to an embodiment of the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that reference numerals and like elements among the drawings are denoted by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention provides a terminal, a base station controller connected to the terminal and a packet data communication through a packet data service node through a switch system, and a base station controller connected to the base station controller through the switch system, and information and subscriber information of the terminals. The present invention relates to a video call service providing method in a mobile communication system including a location register of a stored data terminal. In the following, a mobile communication system to which the present invention is applied will first be described. Next, a video communication service providing method according to an embodiment of the present invention will be described.

1 is a view showing the configuration of a mobile communication system for high-speed data transmission to which the present invention is applied. As shown in FIG. 1, the system to which the present invention is applied is based on a 1x EV-DO (or HRPD: High Rate Packet Data) system. A description with reference to FIG. 1 is as follows.

An access network controller (ANC) 10 connected to an access terminal (AT) 90 of a mobile communication system for high-speed data transmission is performed through an A14 interface discussed in the 1x EVDO standard. General ATM switch network) 20. The gan 20 performs data communication through a Packet Data Serving Node (PDSN) 80 connected to the A10 / A11 interface discussed in the standard.

The gan 20 is connected to a data location register (DLR) 30 of a data terminal through the A14 interface. In addition, the location register 30 of the data terminal, which performs a role similar to a home location register in a mobile communication system serving mainly voice, provides this when the location information of the data terminal is requested from the GAN 20. The location register 30 of the data terminal is also called a session control and mobility management block (SC / MM: Session Controller / Mobility Manager). The location register 30 of the data terminal may be provided outside the gan 20 as shown in FIG. 1, and in another way, a packet control function block provided in the gan 20. It may be configured to include in (not shown).

As shown in FIG. 1, the network 130 to which the originating terminal (AT) 90 belongs and the network 160 to which the called terminal 100 belongs have the same configuration. On the other hand, the location register 30 of the calling data terminal and the location register 50 of the called data terminal are connected via the A13 interface discussed in the standard. The location registers 30 and 50 of each data terminal are connected to a central data terminal location register 40 through an interface for a video call.

The central data terminal location register 40 stores location information and profile information of each terminal for supporting an image service, and performs a function of processing an image service operation requested from the data terminal location register 30. do.

The video call service according to the present invention is provided by a system having the configuration as shown in FIG. Prior to describing an embodiment of the present invention, it is assumed that each of the terminals 90 and 100 performs the following function. The terminals 90 and 100 store subscriber information in the location register of the central data terminal as an interface for a video call through the location registers 30 and 50 of the data terminal to which each terminal belongs. The calling terminal 90 completes PPP Nego (Point to Point Protocol Negotiation) during a video call, and the video call service option provided from the terminal during traffic and the IMSI (International Mobile Identifier) of the called terminal 100. To the location register 30 of the data terminal through the A14 interface.

2 is a signal flowchart illustrating a video communication service providing method according to an exemplary embodiment of the present invention. Hereinafter, a description will be given with reference to FIGS. 1 and 2.

When the request for the video call service occurs from the called terminal 90, the base station controller 10, in step 200, the location of the first data call activation request (VideoCallActivationRequest_A2D) message including the calling / called subscriber information. Transfer to the register 30. The first video call activation request message is an identifier indicating a video call in the 1x EVDO service option, and is unique information recognizable by the location register of the data terminal.

By receiving the first video call activation request message, the location registration register 30 of the data terminal triggers the information that the video call service should be provided. In step 205, the subscriber is called using the IMSI as a key. The service profile request (VideoCallServiceProfileRequest_D2H) message requesting the acquisition of the location information is transmitted to the location register 40 of the central data terminal. In step 210, the location register 40 of the central data terminal receiving the service profile request message receives the session information and packet data service node IP address information of the subscriber currently registered with the IMSI key, and the connected base station system. The service profile response (ViedoCallServiceProfileResponse_H2D) message including the information and the stored location register IP address information of the called terminal is transmitted to the location register 30 of the calling data terminal.

In step 215, the location register 30 of the calling data terminal receiving the information of the called terminal through the service profile response message receives the calling video call service activation information-for example, 1x EVDO service option. And a second video call activation request (VideoCallActivationRequest_D2D) message including a current status information of the subscriber and service profile information, and the like, to the location register 50 of the called party's data terminal through the A13 interface.

In step 220, the location register 50 of the called-party data terminal receiving the second video call activation request message transmits the service activation information to the base station controller 70 through a first call activation instruction (VideoCallActivationDirective_D2A) message. do.

The base station controller 70 receiving the first call activation instruction message transmits the activation information to the called terminal 100. Receiving terminal 100 receives this to set the application (Application) of the terminal for the video call service (Start) to start the video call preparation. Thereafter, the terminal 100 performs a process for transmitting the activation ready information to the location register of the data terminal. The activation preparation information is transmitted to the location register 50 of the data terminal through the base station controller 70. That is, in step 225, the base station controller 70 transmits a second call activation instruction (VideoCallActivationDirective_A2D) message including the activation preparation information to the location register 50 of the data terminal.

In step 230, the location register 50 of the data terminal receiving the second call activation instruction message receives the first video call activation response (VideoCallActivationResponse_D2D) message including the received service activation information through the A13 interface. The data is transmitted to the location register 30 of the calling data terminal.

In step 235, the location register 30 of the originating data terminal receiving the first video call activation response message receives the second video call activation response (VideoCallActivationResponse_D2A) message including the received service activation information. Transfer to (10). Here, the second video call activation response message includes a called subscriber information, a called subscriber status information, and a session information parameter corresponding to the called in response to the first video call activation request message of the base station controller in step 200. In addition, the packet data service node IP address corresponding to the incoming call, the location register IP address of the data terminal, and the temporary identifier information (UATI: Unicast Access Terminal Identifier) information are further included.

The originating base station controller 10 knows that the incoming call information is which session information to which packet data service node through the second video call activation response message. In step 240, the base station controller 10 transmits a video call service request (VideoCallServiceRequest_A2P) message including service ID (video call service) information to the corresponding packet data service node 80 for a service providing request. .

In step 245, the packet data service node 80 processes a connection detail for a point-to-point protocol session and generates a call detail recording (CDR) for charging purposes for the service. , Authorization and Accounting) 110 sends a charge generation (VideoCall_CDR_Generation_P2A) message. The billing generation message includes date / time information on call origination and originating / incoming IMSI information.

In the subsequent step, the originating base station controller 10 and the location register 30 of the data terminal performs the session information update process with the session information update information received from the called party.

In step 250, the originating base station controller 10 transmits a first session update (VideoCallSessionUpdate_A2D) message for updating session information to the location register 30 of the data terminal. Here, the first session update message includes outgoing IMSI information, incoming packet data service node IP address, and incoming session information. In step 250, the location register 30 of the data terminal receiving the first session update message receives a second session update (VideoCallSessionUpdate_D2H) message to notify the location register 40 of the central data terminal of the change of session information. Is transmitted to the location register 40 of the central data terminal. The location register 40 of the central data terminal receiving the second session update message updates the session information and, with a response signal, registers a third session update (VideoCallSessionUpdate_H2D) message with the location register 30 of the originating data terminal. To send). The location register 30 of the originating data terminal receiving the third session update message sends a fourth session update (VideoCallSessionUpdate_D2A) message to the base station controller 10 to notify completion of the session information update. To 10).

In step 200 to step 265, the calling terminal 90 and the called terminal 100 are provided with a video call service.

3 is a signal flow diagram illustrating an outgoing line recovery procedure at the end of a video call service according to an embodiment of the present invention. When the video call is terminated, the calling terminal 90 or the called terminal 100 performs a session close. Hereinafter, a description will be given with reference to FIG. 3.

When the video call ends, in step 300, the originating base station controller 10 sends a call termination (EndOfVideoCall_A2P) message including service ID information, session information, and subscriber number information to the packet data service node 80. send.

In step 310, the packet data service node 80 receiving the call end message receives an end-of-charge (EndOfVideoCall_CDR_P2A) message that includes time information about the call end and information on the subscriber number for billing end processing. Transmit to 110.

In step 320, the originating base station controller 10 transmits a first session termination request (EndOfVideoCallSessionRequest_A2D) including subscriber information to the location register 30 of the calling data terminal for session termination processing.

In step 330, the location register 30 of the originating data terminal receiving the first session end request message receives a second session end request (EndOfVideoCallSessionRequest_D2D) message through the A13 interface. The data is transmitted to the location register 50 of the terminal.

In step 340, the location register 50 of the called-party data terminal receiving the second session end request message transmits a first session end instruction (EndOfVideoCallSessionDirective_D2A) message to the called-side base station controller 70, so that the video call Notify that it is finished. The terminating base station controller 70 receiving the first session end instruction message notifies the terminating terminal 100 of the end of a video call, and the terminating terminal 100 receiving the terminating call notification receives an application related to a video call. Quit all programs. In step 350, the called base station controller 50 transmits a second session end indication (EndOfVideoCallSessionDirective_A2D) message, which is a response signal (Return value) to the first session end indication message, to the location register of the called data terminal. 50).

In step 360, the location register 50 of the called-party data terminal receiving the second session end instruction message sends the first session end response message (EndOfVideoCallSessionResponse_D2D) which is a response signal to the second session termination request message. The data is transmitted to the location register 30 of the side data terminal.

The location register 30 of the originating data terminal having received the first session termination response message receives a second session termination response (EndOfVideoCallSessionResponse_D2A) message which is a response signal to the first session termination request message. 10) to complete the session termination process.

In the case of the called line recovery, as shown in FIG. 4, the same process as that of the outgoing line recovery procedure is performed, and thus description thereof will be omitted.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention has an advantage of providing a video call service in a mobile communication system for high-speed data transmission.

Claims (7)

A base station controller connected to the terminals, a packet data communication through a packet data service node through a switch system, and data connected to the base station controller through the switch system and storing information and subscriber information of the terminals. In a mobile communication system comprising a location register of a terminal, in a video call service providing method, The base station controller, when a video call service request call is generated from a predetermined terminal, transmitting a first video call request message including information of originating / receiving subscriber information to a location register of the data terminal; When the location register of the data terminal receives the first image call request message, the location information of the called terminal, the packet data service node IP address information, and the location register IP address of the called data terminal, which are previously stored in the location register of the predetermined central data terminal Receiving the information, Transmitting, by the location register of the data terminal, a second video call request message including video call service activation information to the location register of the called data terminal; Transmitting, by the location register of the called data terminal, the service activation information to the called terminal through the called base station controller when the second video call request message is received; When the called terminal receives the service activation information, setting up a video call service application and transmitting the video call activation preparation information to the location register of the called data terminal through the called base station controller; When the location register of the incoming data terminal receives the activation preparation information, transmitting a first video call activation response message including the activation preparation information to the location register of the data terminal; When the location register of the data terminal receives the first video call activation response message, transmitting a second video call activation response message including packet data service node IP address information to the base station controller; The base station controller includes a process of receiving a video call service by transmitting a video call service request message including service identifier information to a corresponding packet data service node, wherein the video call service of the mobile communication system for high-speed data transmission is performed. How to Provide. The method of claim 1, wherein the corresponding packet data service node A method of providing a video call service of a mobile communication system for high-speed data transmission, further comprising the step of transmitting a charging generation message including a video call call origination date / time information to a predetermined authentication calculation system. The method of claim 1, wherein the base station controller And transmitting a first session update message including an incoming session information to a location register of the data terminal, for updating the session information. . The location register of claim 2, wherein the location register of the data terminal When the first session update message is received, updating session information with the received session information, and transmitting a second session update message including the changed session information to a location register of the central data terminal; The location register of the central data terminal further comprises the step of updating the session with the changed session information, the video call service providing method of the mobile communication system for high-speed data transmission. The method of claim 1, wherein the base station controller When the call termination message is received from the terminal, transmitting a call termination message including service identifier information, session information, and subscriber number information to the corresponding packet data service node; The base station controller further comprises the step of transmitting a first session termination message including subscriber information to the location register of the data terminal to terminate the session, the video call service providing method of the mobile communication system for high-speed data transmission . The method of claim 5, wherein the packet data service node And upon receiving the call termination message, transmitting a charging termination message including charging termination information to the authentication calculation system. The method of claim 5, wherein the session termination process is performed. Notifying the end of the video call by the location register of the data terminal transmitting a first session end instruction message to the location register of the incoming data terminal; The location register of the terminating data terminal further includes the step of terminating the session by transmitting a third session terminating message to the terminating base station controller upon receiving the second session terminating instruction message. Method of providing a video call service in a communication system.