KR20070069569A - Apparatus, method and system for retransmitting multimedia data - Google Patents

Abstract

A device for retransmitting multimedia data and a method and system therefor are provided to retransmit multimedia data according to a user's pattern if the transmitted multimedia data is not properly delivered to a receiving side, thereby increasing a success rate of a multimedia data transmission service. A multimedia data transmission device receives multimedia data, and transmits a reception notify message in response to the received multimedia data. A reception request agent receives the reception notify message to relay the message to a receiving terminal. If a multimedia data reception possible message is received from the receiving terminal, the multimedia data transmission device retransmits the reception notify message.

Description

Apparatus, Method and System for Retransmitting Multimedia Data

1 is a diagram showing a network environment for multimedia data retransmission according to the present invention;

2 is a block diagram of an embodiment of a multimedia retransmission apparatus according to the present invention;

3 is a configuration diagram of an embodiment of a wireless communication terminal according to the present invention;

4 is a flowchart illustrating a method of retransmitting multimedia data according to the present invention;

5 is a flowchart illustrating another embodiment of a method of retransmitting multimedia data according to the present invention.

* Explanation of symbols for the main parts of the drawings

310: interface 320: transcoder

330: terminal DB 340: storage unit

350: timer 360: control unit

The present invention relates to a technique for retransmitting multimedia data, and more particularly, to an apparatus, a method and a system for retransmitting multimedia data when a receiving terminal cannot receive multimedia data in a mobile communication network, and a wireless communication terminal requiring retransmission.

Recently, various additional functions have been added to a mobile communication terminal in addition to a transmission / reception function of a voice call or a short message. In other words, the mobile communication terminal can receive a web service by accessing the wireless Internet, and is implemented to download, store and play back so-called multimedia data such as an address book, a photo, an animation, a video, and a ringtone.

In addition, the mobile communication terminal has been implemented to add a camera function to take a picture as well as a video, store and play it as well as to transmit to another terminal.

In particular, the Multimedia Messaging Service (MMS), defined in the International Standard Recommendation 3GPP (3rd Generation Partnership Project) Technical Specification (TS) 22.140 and 23.140, provides voice, image, audio, video data, Allows you to send and receive various multimedia data.

Such multimedia data is transmitted through a data channel. That is, a voice call uses a circuit switched voice channel, and the multimedia data uses a packet switched data channel.

Therefore, in a mobile communication network that does not support concurrent operation or Simultaneous Voice and Data (SVD), a voice call and a multimedia data transmission service cannot be provided at the same time. have.

On the other hand, even when SVD is supported, there is a problem that the receiving terminal frequently receives multimedia data due to a collision between codecs when the called terminal simultaneously uses a voice call and a multimedia data transmission service.

In addition, in the case of a terminal that does not support multitask, there is a problem that a user cannot receive multimedia data while using an application offline.

The present invention has been proposed to solve the above problems, and an object thereof is to provide a system and a method for retransmitting when a terminating terminal cannot receive multimedia data in a mobile communication network.

Another object of the present invention is to provide a multimedia transmission apparatus for transmitting multimedia data received from a calling terminal to a called terminal, when the called terminal cannot receive the multimedia data.

In addition, another object of the present invention is to provide a wireless communication terminal for transmitting a non-receipt message including a reason for non-reception to a multimedia transmission device when multimedia data cannot be received.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

According to an aspect of the present invention, there is provided a system for retransmission of multimedia data in a mobile communication network, comprising: a multimedia data transmission device configured to receive multimedia data and to transmit a reception notification message accordingly; And an incoming request agent for receiving the received notification message and relaying the received notification message to a called terminal, wherein the multimedia data transmitting apparatus retransmits the received notification message when receiving a non-received multimedia data message from the called terminal. It is done.

The present invention also provides a method for retransmitting multimedia data in a mobile communication network, the method comprising: receiving multimedia data and transmitting a reception notification message accordingly; Receiving a multimedia data reception impossible message from a terminal that has received the reception notification message; And retransmitting the reception notification message.

The present invention also provides an apparatus for retransmitting multimedia data in a mobile communication network, comprising: notification means for generating a reception notification message upon receipt of multimedia data and transmitting the received notification message to a called terminal; Receiving means for receiving a multimedia data reception impossible message from the called terminal; And control means for controlling the notification means to retransmit the reception notification message upon reception of the non-receipt message through the reception means.

The present invention also provides a wireless communication terminal for requesting retransmission of multimedia data, comprising: receiving means for receiving a multimedia data reception notification message; Determination means for identifying a use state of the terminal; And transmitting means for transmitting a multimedia data reception impossible message when the multimedia data is not in use.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A multimedia messaging service (MMS) message is described as an example of multimedia data, and a multimedia messaging service center (MMSC) is described as an example of a multimedia retransmission apparatus. However, it is clear that the multimedia retransmission device can be implemented as an independent device, not a multimedia messaging service center (MMSC), to provide multimedia data services.

In addition, the reception notification agent for transmitting the multimedia data reception notification message is described as a short messaging service center (SMSC) as an example, but is not limited thereto, and may be implemented as an independent system capable of performing multimedia data reception notification. Clarify that it can be implemented as an internal module of the multimedia retransmission device.

1 is a diagram illustrating a network environment for retransmission of multimedia data according to the present invention.

The originating terminal 101 and the terminating terminal 102 shown in FIG. 1 are terminals that support a multimedia messaging service (hereinafter, referred to as 'MMS'), and support for creating, receiving, and storing and displaying MMS messages. do. Such a mobile terminal has an MMS client installed to support the MMS, and a user can directly write an MMS message using a terminal's own function (camera, etc.) or provide a multimedia content through a mobile communication network (Contents Provider). ) You can connect to the server and write MMS message.

The originating terminal 101 accesses a packet data service node (PDSN) 106 via a base station (BTS) 103 and a base station controller (BSC) 104 to establish a PPP connection with the packet data service node 106. After the execution, the packet data service node 106 is assigned an IP address. The originating terminal 101 transmits the created MMS message to the multimedia messaging service center (MMSC) 109 (hereinafter referred to as 'MMSC') via the packet data service node 106.

Meanwhile, an MMS message may be created using the personal computer 110 as well as the mobile communication terminal and transmitted to the mobile communication terminal. In this case, an MMS client is installed in the personal computer 110 to create an MMS message using multimedia content stored therein, or to connect to a content provider server to create an MMS message and transmit the MMS message to the MMSC 109 through an internet network. .

The MMSC 109 receives and stores an MMS message from a mobile communication terminal or a personal computer, and sends an SMS message to the destination terminal 102 through a short messaging service center (SMSC) 108. Notify that the MMS message has been received by transmitting.

That is, the SMSC 108 obtains the location information of the destination terminal 102 with the home location register (HLR, 107) using the destination terminal information according to the request for delivery of the notification message from the MMSC 109, and the MMSC 109 Transmits a reception notification message received from the < RTI ID = 0.0 >) to < / RTI >

In this case, the MMSC 109 may transmit the MMS message in a pull method or a push method. In each case, the format of the reception notification message is different. When the MMS message is transmitted in a pulled manner, the destination terminal 102 receives the received notification message and displays it for the user to confirm, and the user confirms the corresponding received notification message and the MMSC 109 through the called terminal 102. Access the MMS message to download. On the other hand, when the MMS message is transmitted in a push manner, the called terminal 102 does not display the received notification message to the user and immediately connects to the MMSC 109 to automatically download the corresponding MMS message.

The received notification message sent by the MMSC 109 to the destination terminal 102 through the SMSC 108 includes a callback URL, an MMS message ID, a message subject, a transmission time, an MMS message transmission method (pull or push) field, and the like. .

The destination terminal 102 establishes a data channel by performing PPP negotiation with the packet data service node 106 and accesses the callback URL 222 included in the reception notification message to download the corresponding MMS message. However, when the MMSC 109 transmits an MMS message in a push manner, when the called terminal 102 is currently performing a voice call or cannot download an MMS message using an application offline, the called terminal 102 receives an incoming call. An SMS unreceive message including a number, a callback URL, an MMS message ID, and a reason code (Reason Code) is generated and transmitted to the MMSC 109 via the SMSC 108.

At this time, the called number included in the SMS unreceived message is a special number that can be routed to the MMSC, and the SMSC 108 recognizes that the called number included in the unreceived message is a special number and sends the unreceived message to the MMSC 109. Route.

On the other hand, in a mobile communication network that supports concurrent operation or Simultaneous Voice and Data (SVD), the destination terminal 102 can use the data channel, but lacks resources for data communication to receive an MMS message. If not, the called terminal 102 may send a non-receipt message via a data connection with the MMSC 109. The terminating terminal 102 transmits an unreceivable message through a data channel when it is connected to a packet switched network and cannot receive an MMS message while maintaining a dormant state.

The MMSC 109 reads the unreceivable reason code 243 included in the unreceivable message received from the called terminal 102 and retransmits the reception notification message to the called terminal 102 at a transmission period set for each corresponding reason code.

2 is a block diagram of an embodiment of a multimedia retransmission apparatus according to the present invention.

As shown in FIG. 2, the apparatus for multimedia retransmission according to the present invention includes a network interface 310 for transmitting and receiving data with a mobile communication network and an internet network including a packet data service node, a short messaging service center, and the like, from an originating terminal. Transcoder 320 for converting the received MMS message into a format that can be processed by the called terminal, a terminal DB 330 for storing information of the subscriber station, a received MMS message, and a reason for not receiving the MMS message And a storage unit 340 for storing a retransmission period corresponding thereto, a timer 350 for checking a time for retransmission of the MMS message to the called terminal, and a controller 360 for controlling the overall operation of the multimedia retransmission apparatus.

The multimedia retransmission apparatus receives an MMS message from the packet data service node (PDSN) via the network interface 310 based on TCP / IP and stores the MMS message in the storage unit 340.

The controller 360 creates a push type SMS reception notification message to be transmitted to the called terminal by using the information included in the received MMS message, and transmits the received notification message to an incoming notification agent (for example, a short messaging service center (SMSC)). The SMS reception notification message includes a callback URL, an MMS message ID, an MMS message transmission method (push) field, and the like.

If the called terminal is in a voice call or performs an application and cannot download the MMS message, the called terminal transmits a non-receivable message including a URL, a message ID, and a reason code for not receiving.

The controller 360 of the multimedia data retransmission apparatus extracts an unreceivable reason code from the unreceivable message received through the network interface 310, and the retransmission period corresponding to the extracted unreceivable reason code in the storage unit 340. Search for. For example, the storage unit 340 may be connected to the non-receipt reason code for the voice call and the retransmission period 3 minutes, the nonreception reason code for the use of the application and the retransmission period 5 minutes, respectively, and stored as a table.

In this case, the retransmission period stored in the storage unit 340 may be adjusted according to the terminal usage pattern of the user. For example, the retransmission period for the voice call is set according to the average voice call time of the mobile communication subscribers.

The controller 360 operates the timer 350 to retransmit the reception notification message to the called terminal according to the retransmission period. For example, if the unacceptable reason code included in the unacceptable message is the unacceptable reason code for the voice call, the controller 360 extracts three minutes of retransmission cycles to operate the timer 350 and the corresponding time elapses. At one point in time, the reception notification message is transmitted to the incoming notification agent (eg, a short messaging service center (SMSC)) through the network interface 310.

On the other hand, when the called terminal receives the reception notification message and accesses the multimedia retransmission apparatus based on the callback URL included in the reception notification message, the transcoder 320 stores the terminal information stored in the terminal DB 330, that is, the terminal type and the terminal. The format of the MMS message is converted and transmitted to the called terminal so that the called terminal can play the MMS message with reference to the manufacturer, browser type, version, and terminal type ID.

3 is a configuration diagram of an embodiment of a wireless communication terminal according to the present invention. The wireless communication terminal according to the present invention cannot receive an MMS message during a voice call or when an application or a data channel cannot be downloaded due to the use of a data channel. To the multimedia retransmission device.

As shown in FIG. 3, the wireless communication terminal according to the present invention inputs and outputs a transceiver 410 for transmitting and receiving a wireless signal through an antenna, a key input unit 420 consisting of a plurality of numeric keys and a function selection key, and a voice. The handset 430, the display unit 440 for outputting a text signal and graphics, etc., and stores the MMS message and short message (SMS message) received through the transceiver 410 and the reason for not receiving The memory 450 includes a state determiner 460 for determining a use state of the terminal, and a controller 470 for controlling the overall operation of the terminal.

In particular, the memory 450 stores an unreceivable reason code to be transmitted to the multimedia retransmission apparatus when the terminal cannot download an MMS message, and also generates an SMS unreceived message and an MMS message that includes an unreceiveable reason code. Stores a playback program that plays the message.

The state determination unit 460 continuously checks the current state of use of the terminal, for example, the state of use of the terminal such as voice call, wireless Internet, and use of an application, and provides the terminal state information of the controller 470 when the terminal request information.

When the reception notification message is received through the transceiver 410, the controller 470 requests the terminal usage status information from the status determination unit 460, and stores the memory according to the terminal usage status information transmitted from the status determination unit 460. The non-receipt reason code stored at 450 is read, and the SMS generation module generates an SMS non-receipt message including the non-reception reason code and transmits the paging message.

As described above, the reception notification message includes a callback URL, an MMS message ID, an MMS message transmission method (push), and the like.

The SMS non-receipt message includes a callback URL, a message ID, and a non-receipt reason code read from the memory 450 included in the reception notification message.

URL: http://10.111.222.111:5000

MMS ID: 200512011000002MMS

Unacceptable reason code: 200, Voice_Tr, Traffic_Tr, etc. Here, 200 is a code for using an application, Voice_Tr is a code for voice call, and Traffic_Tr is an example for a code for data channel use. The reason code for not receiving is a promised value between the terminal and the multimedia transmission device. The value specified in this example may be changed according to the definition of the promised value between the terminal and the multimedia transmission device.

On the other hand, the MMS message is received through the transceiver 410 and stored in the memory 450, the MMS message playback program stored in the memory 450 is driven when the user inputs the playback through the key input unit 420, the corresponding MMS message Play the video and show it to the user through the display unit 440.

4 is a flowchart illustrating a method of retransmitting multimedia data according to the present invention.

As shown in Figure 4, the user of the originating terminal writes the MMS message (S501) and transmits the MMS message to the MMSC (S502). More specifically, the originating terminal first performs a PPP negotiation with the packet data service node (PDSN) via the base station and the base station controller, and then transmits an MMS message to the packet data service node (PDSN). The MMS message received from the originating terminal is transmitted to the MMSC based on the IP.

Subsequently, the MMSC generates an SMS reception notification message for receiving and storing the MMS message and transmitting the MMS message in a push manner, and transmits it to the destination terminal via the SMSC (S503 and S504).

That is, the MMSC generates an SMS reception notification message and sends a request to the SMSC, and the SMSC requests the location information of the called terminal to the home location register (HLR) using the called terminal number included in the message. Based on the location information of the called terminal received from the home location register (HLR), the SMSC transmits a reception notification message to the called terminal. As described above, the reception notification message includes a callback URL, an MMS message ID, an MMS message transmission method (push), and the like.

The receiving terminal receiving the SMS reception notification message through paging checks the current use state of the terminal to determine whether the MMSC can be downloaded by accessing the MMSC (S505). That is, it is determined whether the current terminal is in a state of voice call, application use, data channel use, and the like.

If the user is currently using a voice call or wireless Internet or an application, the reception reason code corresponding to the corresponding reason is read from the memory to generate an SMS reception failure message and transmitted to the SMSC through paging (S506). The SMS unacceptable message includes a callback URL, a message ID, and a reason for not receiving a code.

The SMSC transmits the unreceivable message received from the called terminal to the MMSC (S507), and after the MMSC recognizes the unacceptable reason code included in the unreceivable message (S508), the retransmission cycle (T) assigned to the corresponding reason (T). The reception notification message is retransmitted (S509 and S510).

The receiver terminal receiving the retransmitted reception notification message accesses the URL included in the reception notification message (S511), and downloads the corresponding MMS message (S512). That is, the terminating terminal opens a data channel through PPP negotiation with the packet data access node (PDSN) via the base station and the base station controller, and the packet data access node (PDSN) accesses the MMSC so that the terminating terminal downloads the MMS message from the MMSC. To receive it.

The called terminal stores the downloaded MMS message in the memory and drives the MMS viewer program to play the MMS message stored in the memory according to the user's playback input.

5 is a flowchart illustrating another embodiment of a method of retransmitting multimedia data according to the present invention.

As shown in FIG. 5, first, the MMSC receives an MMS message from an originating terminal and stores the received MMS message (S601).

Subsequently, a reception notification message is created based on the information included in the MMS message and transmitted to the destination terminal through the SMSC (S602). More specifically, the MMSC composes a reception notification message and sends a notification request to the SMSC. The SMSC obtains the reception location information from the home location register based on the called party number included in the reception notification message and sends the reception notification message to the destination terminal. send.

As described above, the reception notification message includes a callback URL, an MMS message ID, an MMS message transmission method (push), and the like.

The called terminal receiving the reception notification message checks the current use state of the terminal. If the data channel is not available, i.e. during a voice call or using a data channel, or if an application is in use, an SMS unacceptable message containing the code of the reason is generated and sent to the MMSC via the SMSC ( S603). The unacceptable message includes the URL, the message ID, and the unacceptable reason code included in the receipt notification message.

After receiving the non-receipt message from the called terminal, the MMSC reads the non-receipt reason code included in the non-receipt message and sets a retransmission period according to the reason (S604).

The MMSC retransmits the reception notification message to the destination terminal through the SMSC according to the set period (S605), and the destination terminal, which has been resolved, opens the data channel and accesses the URL included in the reception notification message received from the MMSC. Download the MMS message (S606).

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

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

The present invention as described above, in the various multimedia data transmission services, such as MMS message, VOD, when the transmitted multimedia data is not properly delivered to the called party by re-transmitting the multimedia data in accordance with the user's pattern, In addition to increasing the success rate, there is an effect that can increase the service satisfaction of the user.

Claims (13)

A system for retransmission of multimedia data in a mobile communication network, A multimedia data transmission device for receiving multimedia data and transmitting a reception notification message accordingly; And Including the incoming request agent for receiving the reception notification message and relaying to the destination terminal, And the multimedia data transmission device retransmits the reception notification message when receiving the multimedia data reception impossible message from the called terminal. The method of claim 1, The non-receipt message, And a non-receipt reason code. The method of claim 2, The multimedia data transmission device, And retransmitting the reception notification message by determining a retransmission cycle according to a non-reception reason code. A method for retransmitting multimedia data in a mobile communication network, (a) receiving multimedia data and transmitting a reception notification message accordingly; (b) receiving a multimedia data reception impossible message from a terminal receiving the reception notification message; And (c) resending the receipt notification message. Multimedia data retransmission method comprising a. The method of claim 4, wherein The non-receipt message, And a non-receipt reason code. The method of claim 5, In step (c), And retransmitting the reception notification message by determining a retransmission cycle according to the non-reception reason code. An apparatus for retransmitting multimedia data in a mobile communication network, Notification means for generating a reception notification message upon receipt of the multimedia data and transmitting it to the called terminal; Receiving means for receiving a multimedia data reception impossible message from the called terminal; Control means for controlling the notification means to retransmit the reception notification message upon reception of a reception impossible message through the reception means; Multimedia data transmission device comprising a. The method of claim 7, wherein The non-receipt message, And a non-receipt reason code. The method of claim 8, Storage means for storing an unacceptable reason code and a corresponding retransmission period Multimedia data transmission device further comprises. The method of claim 9, The control means, And a retransmission period is determined by comparing the non-receipt reason code included in the non-receipt message with the non-receipt reason code stored in the storage means. A wireless communication terminal requiring retransmission of multimedia data, Receiving means for receiving a multimedia data reception notification message; Determination means for identifying a use state of the terminal; And Transmitting means for transmitting a multimedia data reception impossible message when the multimedia data is not in use; Wireless communication terminal comprising a. The method of claim 11, The non-receipt message, And a non-receipt reason code. The method of claim 12, Storage means for storing an unacceptable reason code Wireless communication terminal further comprising.

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