Abstract:
A method for downloading high-capacity data of multimedia content data (e.g., MP3, music video, and movie, etc.) in a mobile communication terminal, and a system for implementing the same are disclosed. The method for downloading data in a mobile communication terminal includes the steps of: selecting a desired data over a mobile communication network, and downloading the selected data over a broadcast network. Therefore, a user can download multimedia content data over a data channel of a DMB network, instead of the Internet of a mobile communication network, resulting in reduction of internet charges accumulated when downloading the high-capacity data.

Description:
CROSS REFERENCE TO RELATED APPLICATION  
       [0001]     This application claims the benefit of Korean Patent Application No. 10-2005-0049833, filed on Jun. 10, 2005, which is hereby incorporated by reference as if fully set forth herein.  
       BACKGROUND OF THE INVENTION  
       [0002]     1. Field of the Invention  
         [0003]     The present invention relates to a method and system for downloading data, and more particularly to a method for downloading high-capacity data such as multimedia content data (e.g., MP3, music video, and movie, etc.) in a mobile communication terminal, and a system for implementing the same.  
         [0004]     2. Discussion of the Related Art  
         [0005]     In recent times, with the increasing development of information communication technologies, information and communication environments have been abruptly changed. Particularly, mobile communication terminals have been considered to be requisites for modern society, and have been widely used throughout the world. With the increasing demands of users due to widespread use of the above-mentioned mobile communication terminals, not only a general voice call function, but also a variety of functions (e.g., a SMS function, and functions for downloading/reproducing multimedia content data, etc.) have been added to the mobile communication terminals.  
         [0006]     In association with the function for downloading the multimedia content data, a conventional mobile communication terminal has widely used the Internet over a mobile communication network to download the multimedia content data. However, if a plurality of terminal users simultaneously and frequently download high-capacity multimedia content data, traffic increases due to a limited network bandwidth of the Internet.  
         [0007]     Considering the above-mentioned situation, mobile communication service providers have assessed Internet charges, for terminal users, in packet units associated with the traffic caused by multimedia content data.  
         [0008]     Therefore, a user who desires to download multimedia content data in his or her mobile communication terminal must unavoidably pay not only a usage fee for desired content data, but also Internet traffic charges for downloading the content data. As a result, teenagers and twenties, who tend to have great desire to download multimedia content data but do not have enough financial ability to pay, may feel a huge economical burden.  
         [0009]     A multimedia content provider transmits high-capacity multimedia content data using limited network resources, such that it has difficulty in simultaneously providing many users with the high-capacity multimedia content data.  
       SUMMARY OF THE INVENTION  
       [0010]     Accordingly, the present invention is directed to a method and system for downloading high-capacity data that substantially obviate one or more problems due to limitations and disadvantages of the related art.  
         [0011]     An object of the present invention is to provide a method and system for downloading multimedia content data, which allows a user to download desired multimedia content data at lower prices by reducing the double-charging problems, and allows a multimedia content provider to simultaneously provide many more users with the multimedia content data, resulting in increased economical efficiency.  
         [0012]     Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.  
         [0013]     To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a method for downloading data in a mobile communication terminal comprising the steps of: selecting a desired data over a mobile communication network, and downloading the selected data over a broadcast network.  
         [0014]     In another aspect of the present invention, there is provided a method for downloading data comprising the steps of: accessing a server to select a desired data over a mobile communication network by a mobile communication terminal, reserving a transmission schedule of the data by the server, transmitting the selected data over a broadcast network based on the transmission schedule by the server, and receiving the data over the broadcasting network by the mobile communication terminal.  
         [0015]     In yet another aspect of the present invention, there is provided a system for downloading data comprising: a server for providing a variety of data, and a mobile communication terminal for accessing to the server to select a desired data over a mobile communication network and downloading the selected data over a broadcast network.  
         [0016]     In yet another aspect of the present invention, there is provided a mobile communication terminal for downloading data comprising: a mobile communication module for accessing a server capable of providing the data over a mobile communication network, and selecting a desired data from the server, and a mobile broadcast module for downloading the selected data over a mobile broadcast service network.  
         [0017]     It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0018]     The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:  
         [0019]      FIG. 1  is a block diagram illustrating a system for downloading multimedia content data according to the present invention; and  
         [0020]      FIG. 2  is a flow chart illustrating a method for downloading multimedia content data according to the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0021]     Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.  
         [0022]     It should be noted that the present invention uses a broadcast network for downloading data, especially high-capacity data such as multimedia content data (e.g., MP3, music video, and movie, etc.). Preferably, the present invention uses a mobile broadcast network capable of receiving broadcast data while in motion.  
         [0023]     The term “mobile broadcast” is indicative of a variety of mobile multimedia broadcast services (e.g., a MediaFlo service of the United States, a DMB (Digital Multimedia Broadcasting) service of the Republic of Korea, and a DVB-H service of Europe, etc.). Typically, the mobile broadcast provides users with a multi-channel multimedia broadcast service and a high-speed digital data service, such that the users can receive desired broadcast data via mobile phones, PDAs, or receivers for vehicles, etc. while in motion.  
         [0024]     It should be noted that the present invention is designed to download high-capacity data using the above-mentioned data services of the mobile broadcast.  
         [0025]     For the convenience of description and better understanding of the present invention, it is assumed that the present invention exemplarily shows a method for downloading multimedia content data over the DMB network of the Republic of Korea, however, it should be noted that the present invention is not limited to the above-mentioned DMB network or multimedia content data, and can be applied to all of broadcast networks capable of providing data services as necessary, such that it can download high-capacity data.  
         [0026]     A preferred embodiment of the present invention will hereinafter be described with reference to  FIGS. 1 and 2 .  
         [0027]      FIG. 1  is a block diagram illustrating a system for downloading multimedia content data according to the present invention.  FIG. 2  is a flow chart illustrating a method for downloading multimedia content data according to the present invention.  
         [0028]     Referring to  FIGS. 1 and 2 , a user of the mobile communication terminal  110  gains access to a content server  150  for providing multimedia content data over the Internet via a mobile communication network  130 .  
         [0029]     The user&#39;s access to the content server  150  over the mobile communication network is facilitated by a mobile communication module  113  of the mobile communication terminal  110 , which is controlled by a controller  117  of the mobile communication terminal  110 . The content server  150  provides the terminal user with a list of multimedia content data (e.g., MP3, music video, and movie, etc.) possessed by the server, and the user selects desired multimedia content data from among the list of multimedia content data at step S 201 .  
         [0030]     Then, the content server  150  reserves a transmission schedule for transmitting the selected multimedia content data to the user over a DMB data channel of a DMB network  190  at step S 203 . Data is not selectively applied to only a specific person via the DMB data channel, and is simultaneously applied to unspecified users who register as members in a DMB service, such that it is necessary to reserve a transmission (TX) schedule indicating what time or how long the selected multimedia content data will be transmitted to unspecified users.  
         [0031]     The content server  150  generates an encryption key (also called an encoding key) associated with the selected multimedia content data at step S 203 . The content server  150  transmits the reserved transmission (TX) schedule and the encryption key to the mobile communication terminal  110  over the mobile communication network  130  at step S 205 .  
         [0032]     The mobile communication terminal  110  receives/stores the encryption key and the transmission (TX) schedule at step S 207 .  
         [0033]     The encryption key is employed when the mobile communication terminal  110  reproduces received multimedia content data. The transmission (TX) schedule controls the mobile communication terminal  110  to automatically receive the multimedia content data at a date and/or time according to the transmission (TX) schedule.  
         [0034]     In the meantime, we can imagine a case where the selected multimedia content data for the user has been also already selected by a third party before the user&#39;s selection, such that a transmission (TX) schedule/an an encryption key for the above-mentioned multimedia content data has been already reserved/generated for the third party.  
         [0035]     In this case, the content server  150  uses the reserved transmission (TX) schedule as a transmission (TX) schedule for the user.  
         [0036]     In other words, the content server  150  transmits the already reserved transmission (TX) schedule and the already generated encryption key for the third party, to the user. As a result, although several users repeatedly desire to download the same multimedia content data, the content server  150  makes the users to simultaneously download the same multimedia content data, such that a data channel of the DMB network  190  can be more effectively used.  
         [0037]     Thereafter, the content server  150  encrypts (or encodes) the selected multimedia content data using the encryption key at step S 209 . If a current time reaches a predetermined transmission (TX) time reserved by the transmission (TX) schedule, the content server  150  transmits the encrypted multimedia content data to a DMB broadcast equipment  170 . The DMB broadcast equipment  170  transmits the above-mentioned multimedia content data to unspecified users over the DMB data channel of the DMB network  190  at step S 211 .  
         [0038]     However, the unspecified users other than the above-mentioned user do not have the encryption key, so that they cannot decode/reproduce the encrypted multimedia content data, only the above-mentioned user who has already received the above-mentioned encryption key over the mobile communication network can receive/decode/reproduce the encrypted multimedia content data.  
         [0039]     Thereafter, the mobile communication terminal  110  receives the above-mentioned multimedia content data transmitted via the DMB data channel at step S 211 . Therefore, it is preferable that the mobile communication terminal  110  is implemented with a DMB terminal including a DMB module  115 , and the DMB module  115  receives data over the DMB data channel. The DMB module  115  is controlled by the controller  117  of the mobile communication terminal  110   
         [0040]     In the meantime, if the above-mentioned multimedia content data is completely received, the mobile communication terminal  110  transmits a reception (RX) completion message of the multimedia content data to the content server  150  over the mobile communication network  130  at step S 213 .  
         [0041]     The content server  150  repeatedly transmits the above-mentioned multimedia content data over the DMB data channel during a transmission (TX) time based on the transmission (TX) schedule until receiving the reception (RX) completion message.  
         [0042]     If the multimedia content data is transmitted to a plurality of users according to the same transmission (TX) schedule, the content server  150  repeatedly transmits the multimedia content data until receiving reception (RX) completion messages from all the users.  
         [0043]     Therefore, if the content server  150  receives the reception (RX) completion messages from the user or all users within the transmission (TX) time, it stops transmitting the multimedia content data, and uses the remaining TX time to reserve/transmit other multimedia content data for other users.  
         [0044]     However, if the TX time elapses, the content server  150  stops transmitting the multimedia content data irrespective of reception of the RX completion message, and transmits the next scheduled multimedia content data according to the TX schedule at step S 215 .  
         [0045]     The mobile communication terminal  110  decodes the encrypted multimedia content data received via the DMB network  190  using the encryption key received via the mobile communication network  130 , and stores the decoded multimedia content data at step S 217 . The mobile communication terminal  110  reproduces the stored multimedia content data for the terminal user as necessary.  
         [0046]     As apparent from the above description, the method and system for downloading multimedia content data according to the present invention have the following effects.  
         [0047]     Firstly, the present invention allows a user to download multimedia content data over a data channel of the DMB network, instead of the Internet of a mobile communication network, such that it can greatly reduce Internet charges for downloading the multimedia content data as compared to the conventional art.  
         [0048]     Secondly, if a plurality of users attempts to download the same multimedia content data, the present invention can simultaneously transmit the multimedia content data to the users whereas the conventional art must repeatedly transmit the multimedia content data to individual users, such that it improves use efficiency of a network acting with limited resources.  
         [0049]     Thirdly, the multimedia content provider can provide the users with the multimedia content data at low prices, resulting in increased economical efficiency.  
         [0050]     It is obvious to those skilled in the art that the present invention can be modified into other specific formats without departing from the spirit or scope of the inventions.  
         [0051]     For example, although the present invention has exemplarily disclosed the method/system for downloading multimedia content data over the DMB network, it is obvious to those skilled in the art that the present invention may be adapted to download the multimedia content data over any other broadcast network capable of transmitting other data.  
         [0052]     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 inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.