KR20060117778A - DRM based video content service method and apparatus - Google Patents

Abstract

The present invention relates to a DRM-based VOD content service method and apparatus. A method of providing a VOD content purchase service according to the present invention is a method of providing a VOD content purchase service in a content providing server which is combined with a DRM server and at least one user terminal through a communication network, wherein the VOD content purchase request signal is received from a user terminal. Receiving the VOD content list information to the user terminal in response to the VOD content purchase request signal, receiving the purchase information from the user terminal that purchased the VOD content using the VOD content list information, and purchasing information. Confirming that the user terminal is a DRM phone, transmitting the purchased content to the user terminal, receiving a content download completion signal from the user terminal, and storing a purchase log by receiving the content download completion signal; do.

Description

DRM-based video content service method and apparatus {Method and Apparatus for providing multi-media contents service using DRM}

1 is a view schematically showing the configuration of a VOD content service using a DRM server according to an embodiment of the present invention.

2 is a diagram illustrating a configuration of a user terminal to which a DRM module is applied for providing a VOD content service according to an exemplary embodiment of the present invention.

3 is a block diagram showing a content providing server according to an embodiment of the present invention.

4 is a module configuration diagram of a content providing server according to an embodiment of the present invention.

5 is a signal flow diagram illustrating a procedure for purchasing VOD content by a user terminal according to an exemplary embodiment of the present invention.

6 is a signal flow diagram illustrating a procedure for presenting VOD content by a user terminal according to an embodiment of the present invention.

7 is a signal flow diagram illustrating a procedure for receiving a VOD content from the user terminal according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

101... User terminal 103. communications network

105... Content providing server 107. DRM server

The present invention relates to a DRM-based VOD content service method and apparatus.

Currently, wireless data networks are growing relatively faster than other broadcasting media (eg, radio, TV, cable, broadcasting, etc.) due to the increase in users using wireless communication.

Recently, wireless internet services have provided various high quality multimedia video on demand (VOD) contents to wireless terminals according to the development of advanced technologies such as real time video transmission technology, location tracking, and voice recognition. A wireless terminal capable of providing various multimedia VOD contents services such as a video image file and a music file through the wireless data network includes a terminal for IMT-2000. The wireless terminal for the VOD content service is equipped with a WAP browser and a VOD player to download and play VOD content data from a service server through a wireless data network.

Meanwhile, in a system providing VOD services through a wireless network and a wired network, in particular, a system based on an IP network and providing a VOD content service to a dedicated terminal, abnormally accessing an IP address and a port providing a service The user needs to be denied access.

That is, it is necessary to prevent not only illegal access by the third party to the content, but also unnecessary access of the corresponding user, for example, accessing the content exceeding the valid time or accessing the content more than once. Therefore, the VOD service is required in the system, in order to prevent the charging problem of the content access, system security problems, etc. in advance, and to implement a more efficient content access.

An object of the present invention is to provide a method and apparatus for purchasing VOD content using a DRM-based communication network.

Another object of the present invention is to provide a method and apparatus for sending and receiving VOD content gifts using a DRM-based communication network.

Another object of the present invention is to provide a method and apparatus for safely providing VOD content to a user terminal using a DRM server.

In order to achieve the above objects, according to an aspect of the present invention, in a method for providing a VOD content purchase service in a content providing server coupled with a DRM server and at least one user terminal through a communication network, VOD from the user terminal Receiving a content purchase request signal, transmitting VOD content list information to the user terminal in response to the VOD content purchase request signal, and purchasing information from the user terminal that has purchased VOD content using the VOD content list information Receiving, the step of confirming that the user terminal is a DRM phone based on the purchase information, transmitting the purchased content to the user terminal, receiving a content download completion signal from the user terminal and the content download Receive a completion signal It may provide a method for providing a VOD content purchase service comprising the step of storing.

In a preferred embodiment, the purchase information may include the VOD content information purchased on the basis of the VOD content list information and the identifier of the user terminal. In addition, the content transmission step may be characterized in that to transmit the DCF content to the user terminal if the user terminal confirms that the DRM phone. The method may further include receiving a content download completion signal from the user terminal and confirming that the user terminal is a DRM phone. The purchase log may include a purchased content ID and a user contract number.

According to another aspect of the present invention, a method for providing a VOD content purchase service in a DRM server coupled with a content providing server and at least one user terminal via a communication network, the method comprising: receiving a usage right confirmation request signal from the user terminal Authenticating content by receiving the use right request signal, checking a user terminal by receiving the use right request signal, receiving purchase confirmation information from the content providing server, and based on the purchase confirmation information A method of providing a VOD content purchasing service including authenticating a content purchase and authenticating a purchase of the content and transmitting a use right to the user terminal may be provided.

In a preferred embodiment, the DRM server may be characterized by using an Open Mobile Alliance (OMA) 2.0 based encryption scheme. In addition, the purchase confirmation information may be characterized in that the information of the user terminal including the DRM module by the OMA (Open Mobile Alliance) 2.0-based encryption scheme.

According to another aspect of the present invention, a method of providing a VOD content gift service for presenting VOD content in a content providing server coupled with at least one user terminal through a communication network, the VOD content present request signal from the user terminal Receiving VOD content list information to the user terminal in response to the VOD content present request signal, receiving gift information from the user terminal that has purchased VOD content using the VOD content list information; The present invention may provide a method for providing a VOD content gift service including generating a gift text message based on the gift information and transmitting the gift text message to another user terminal.

In a preferred embodiment, the gift information may include purchased VOD content information and an identifier of the user terminal. The method may further include identifying that the user terminal is a DRM phone based on the gift information.

According to another aspect of the present invention, a method for providing a VOD content gift service for receiving VOD content in a content providing server coupled with a DRM server and at least one user terminal through a communication network, the callback access signal from the user terminal Receiving a content, transmitting content to the user terminal using a channel formed by the callback access signal, receiving a content download completion signal from the user terminal, and receiving the content download completion signal to obtain a purchase log. It may provide a method for providing a VOD content gift service comprising the step of storing.

In an exemplary embodiment, the method may further include receiving a content download completion signal from the user terminal to confirm that the user terminal is a DRM phone. The purchase log may include a purchased content ID and a user contract number.

According to another aspect of the present invention, a method for providing a VOD content gift service for receiving VOD content in a DRM server coupled with a content providing server and at least one user terminal through a communication network, the use authority confirmation from the user terminal Receiving a request signal, authenticating content by receiving the usage right request signal, checking a user terminal by receiving the usage right request signal, receiving purchase confirmation information from the content providing server; A method of providing a VOD content presenting service comprising authenticating a content purchase based on the purchase confirmation information and transmitting a use right to the user terminal by authenticating the purchase of the content.

In a preferred embodiment, the DRM server may be characterized by using an Open Mobile Alliance (OMA) 2.0 based encryption scheme. In addition, the purchase confirmation information may be characterized in that the information of the user terminal including the DRM module by the OMA (Open Mobile Alliance) 2.0-based encryption scheme.

According to another aspect of the present invention, a content providing server coupled with a DRM server and at least one user terminal through a communication network to provide a VOD content purchase service, comprising: means for receiving a VOD content purchase request signal from the user terminal; Means for transmitting VOD content list information to the user terminal in response to the VOD content purchase request signal, means for receiving purchase information from the user terminal that purchased VOD content using the VOD content list information, and the purchase information. Means for confirming that the user terminal is a DRM phone, means for transmitting the purchased content to the user terminal, means for receiving a content download completion signal from the user terminal, and storing the purchase log by receiving the content download completion signal Providing content comprising means for You can provide a server.

According to another aspect of the present invention, a DRM server coupled to a content providing server and at least one user terminal via a communication network and providing a VOD content purchase service, means for receiving a usage right confirmation request signal from the user terminal Means for authenticating content by receiving the usage right request signal, means for checking the user terminal by receiving the usage right request signal, means for receiving purchase confirmation information from the content providing server, based on the purchase confirmation information A DRM server may include a means for authenticating a content purchase and a means for authenticating the purchase of the content to transmit a use right to the user terminal.

According to another aspect of the present invention, a content providing server for providing a VOD content gift service for presenting VOD content coupled to a DRM server and at least one user terminal through a communication network, the VOD content present request signal from the user terminal Means for transmitting VOD content list information to the user terminal in response to the VOD content present request signal, and means for receiving gift information from the user terminal that purchased VOD content using the VOD content list information. And a means for generating a gift text message based on the gift information, and a means for transmitting the gift text message to another user terminal.

According to another aspect of the present invention, in the content providing server for providing a VOD content gift service that is combined with the DRM server and at least one user terminal via a communication network to receive the VOD content, receiving a callback access signal from the user terminal Means for transmitting content to the user terminal using a channel formed by the callback connection signal, means for receiving a content download completion signal from the user terminal, and receiving the content download completion signal to store a purchase log; It can provide a content providing server comprising a means.

According to another aspect of the present invention, in the DRM server for providing a VOD content gift service that is combined with the content providing server and at least one user terminal via the communication network to receive the VOD content gift, the user authority confirmation request signal from the user terminal Means for receiving a license, a means for authenticating content by receiving the usage right request signal, means for confirming a user terminal by receiving the usage right request signal, means for receiving purchase confirmation information from the content providing server, and purchase confirmation. A DRM server may include a means for authenticating a content purchase based on information, and a means for authenticating the purchase of the content to transmit a use right to the user terminal.

According to another aspect of the present invention, a content providing server coupled with a DRM server and at least one user terminal through a communication network to provide a VOD content purchase service, a memory in which a program is stored, coupled to the memory and the program And a processor for executing a VOD content purchase request signal from the user terminal, and transmitting VOD content list information to the user terminal in response to the VOD content purchase request signal. Step, Receiving the purchase information from the user terminal that purchased the VOD content using the VOD content list information, Confirming that the user terminal is a DRM phone based on the purchase information, Content purchased to the user terminal Transmitting to the user terminal And receiving the content download completion signal and receiving the content download completion signal to store a purchase log.

According to another aspect of the present invention, a DRM server coupled to a content providing server and at least one user terminal through a communication network to provide a VOD content purchase service, a memory in which a program is stored, coupled to the memory and the program And a processor for executing the program, wherein the processor receives, by the program, a usage right confirmation request signal from the user terminal, receiving the usage right request signal to authenticate contents, and receiving the usage right request signal. Receiving and confirming the user terminal; receiving purchase confirmation information from the content providing server; authenticating content purchase based on the purchase confirmation information; and authenticating the purchase of the content to transfer the use authority to the user terminal. Characterized by executing the step of transmitting A system can be provided.

According to another aspect of the present invention, a content providing server for providing a VOD content gift service for presenting VOD content, coupled with the DRM server and at least one user terminal through a communication network, the memory, the program is stored, the memory And a processor coupled to the processor to execute the program, wherein the processor receives, by the program, a VOD content present request signal from the user terminal, the VOD content present to the user terminal in response to the VOD content present request signal. Transmitting list information, receiving gift information from the user terminal purchasing VOD content using the VOD content list information, generating a gift text message based on the gift information, and generating the gift text message. Transmitting to another user terminal It is possible to provide a system which is characterized in that execution.

According to another aspect of the present invention, in the content providing server for providing a VOD content gift service that is combined with the DRM server and at least one user terminal via a communication network to receive VOD content gift, the memory, the program is stored in the memory A processor coupled to the processor to execute the program, the processor receiving, by the program, a callback access signal from the user terminal; Transmitting content to the user terminal using a channel formed by the callback access signal; receiving a content download completion signal from the user terminal; and receiving the content download completion signal and storing a purchase log; It is possible to provide a system characterized in that.

According to another aspect of the present invention, in the DRM server for providing a VOD content gift service that is combined with the content providing server and at least one user terminal via the communication network to receive the VOD content gift, the memory, the program is stored in the memory A processor coupled to the processor to execute the program, wherein the processor receives, by the program, a usage right confirmation request signal from the user terminal, receiving the usage right request signal to authenticate content; Checking a user terminal by receiving a usage right request signal, receiving purchase confirmation information from the content providing server, authenticating a content purchase based on the purchase confirmation information, and authenticating the purchase of the content Transmitting the authority to the user terminal The running can provide a system which is characterized.

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

1 is a diagram schematically illustrating a configuration of a VOD content service using a DRM server according to an embodiment of the present invention.

Referring to FIG. 1, the VOD content service according to the present invention includes a user terminal 101, a communication network 103, a content providing server 105, and a DRM server 107.

The user terminal 101 is a mobile terminal for performing mobile communication through the communication network 103, and is equipped with a mobile platform including a DRM module and includes a VOD content player for downloading VOD contents. The user terminal 101 communicates with the DRM server 107 through a wired or wireless communication network 103 to perform communication, and receives a message from the content providing server 105 to output a message in a standby mode. Include. In addition, the user terminal 101 may receive the content purchased from the content providing server 105 and transmit a content download completion signal to the content providing server 105. In addition, the user terminal 101 may be authenticated to purchase the VOD content from the DRM server 107 to download the right to use the VOD content. The user terminal 101 may include a mobile phone, a PDA phone, a smart phone, a notebook, a tablet PC, and the like.

The content providing server 105 is connected to the user terminal 101 and the DRM server 107 through the communication network 103. The content providing server 105 may receive a VOD content purchase or a VOD content present from the user terminal 101 and transmit the VOD content list information to the user terminal 101. The content providing server 105 further includes a function of authenticating that the terminal to receive the content to the DRM server 107 by receiving the purchase information or the gift information from the user terminal 101 is a DRM phone. The content providing server 105 further includes a function of authenticating that the user terminal 101 is a DRM phone, and then applying the DRM content purchase policy to the VOD content to transmit the converted DRM content format. In addition, the content providing server 105 receives a content download completion signal from the user terminal 101 includes a function of confirming that the user terminal is a DRM phone, and then stores the purchase log. Here, the purchase log includes the contract number and the content ID of the content user.

The DRM server 107 is connected to the user terminal 101 and the content providing server 105 through the communication network 103. The DRM server 107 includes a function of receiving a usage right confirmation request signal from the user terminal 105 to perform VOD content authentication and user confirmation. In addition, the DRM server 107 authenticates the VOD content purchase of the user terminal 101 by using the content providing server 105, and further transmits a usage right to the user terminal 101 according to whether the VOD content purchase is authenticated. Include. When the DRM server 107 receives the purchase confirmation information from the content providing server 105, the DRM server 107 encrypts the VOD content and generates authentication information (Right Object: RO) capable of interpreting the encrypted VOD content. Play a role. In particular, in the present invention, the encryption scheme provided by the DRM server 107 may be based on OMA (Open Mobile Alliance) 2.0. The OMA (Open Mobile Alliance) 2.0 type of encryption is one of the world's standards among the content encryption method, so a person having ordinary knowledge in the field related to the encryption method can easily know the detailed description thereof will be omitted.

A method of providing a service according to the present invention will be described with reference to the above configuration as follows.

First, the user terminal 101 receives a content list information by requesting a VOD content purchase or a VOD content present from the content providing server 105 to purchase or present the VOD content. The user terminal 101 purchases content based on the content list information and transmits the purchase information or the gift information to the content providing server 105. The content providing server 105 receiving the purchase information authenticates that the user terminal 101 to receive the content is a DRM phone, and transmits a DRM Contents Format (DCF Contents Format) content to which a DRM content purchase policy is applied. Here, the content providing server 105 receiving the gift information authenticates that the user terminal 101 to receive the content is a DRM phone, applies the DRM content purchase policy, and transmits a gift text message. The user terminal 101 receiving the DCF content downloads the DCF content and transmits a content download completion signal to the content providing server 105. In this case, when the user terminal 101 does not support DRM, the content providing server 105 may transmit the VOD content as it is and complete the purchase. The content providing server 105 receiving the content download completion signal confirms that the user terminal 101 is a DRM phone, and stores a purchase log. Thereafter, the user terminal 101 requests a usage right confirmation from the DRM server 107. Receiving the usage right request signal, the DRM server 107 issues a content key to authenticate the content and confirms the user of the content. In addition, the DRM server 107 receives the content purchase confirmation information from the content providing server 105 to authenticate the VOD content purchase. Thereafter, the user terminal 101 receives and downloads a usage right of the VOD content from the DRM server 107. In this case, when the DRM server 107 does not authenticate the purchase of the VOD content, the DRM server 107 may transmit a VOD content repurchase message to the user terminal 101.

According to the present invention, if the user terminal 101 wants to listen in advance by dividing the pre-listening file and the original file of the VOD content, the user terminal 101 may use the pre-listening file from the content storage server 105. Can be. In addition, when the user terminal 101 wants to download VOD content, the user terminal 101 may use a file to which DRM is applied from the content storage server 105. The service according to the present invention may be applied to the VOD content and AOD content download service.

2 is a diagram illustrating a configuration of a user terminal to which a DRM module is applied for providing a VOD content service according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the terminal platform includes a memory 200, an OEM HAL I / O area 210, a native area 220, a WIPI area 230, and a DRM module 240.

The terminal VOD platform includes the functions of the existing terminal platform as it is, including GVM, SK-VM, KVM, MAP, BREW, and WIPI. In addition, the terminal VOD platform further includes a function of receiving a content by receiving a callback connection to a content providing server when receiving a gift text message according to the present invention. The terminal VOD platform also provides an inquiry and update interface for the purchase log.

The memory 200 stores personal certificates, usage rights, DRM contents, general contents, and the like, and the information is usually stored in an included ROM area and can be erased as necessary. Electrically erasable ROMs include EEPROM, flash memory, and the like. The memory 200 also includes a RAM that temporarily stores data generated during execution of various operation programs. In addition, the memory 200 further includes a function of storing a message received from a content providing server.

The OEM HAL I / O area 210 includes a WIPI HAL API and is connected to the native area 220 and the WIPI area 230. The WIPI HAL API is a collection of WIPI HAL APIs supported by the platform used by the application developer. In addition, the WIPI HAL API includes a C API and a Java API to provide convenience for program developers.

The native area 220 is connected to the content library 222, the content player 224, and the KUN Browser 226. The content library 222 performs a user interface function of the mobile terminal for providing VOD content information. The content player 224 performs a software function on the mobile terminal for executing the VOD content. The KUN Browser 226 performs a web browser function that supports general wired pages as well as existing wireless pages.

The WIPI region 230 includes a WIPI code and an extended WIPI and is connected to the DRM module 240.

The DRM module 240 includes a usage rights library 231, a personal certificate library 232, an application performance management (233), a DRM D / L Agent 234, a DRM content 235, a DRM application 236, and DRM Agent 237 is included.

The usage rights library 231 serves as a user interface for managing usage rights. Here, the usage right may have multiple usage rights in one content, and is a key to solve the encrypted content. In addition, the usage right is inputted with information such as a period and a date during which the content can be used. The personal certificate library 232 performs a function of requesting a certificate from the user to the DRM server and downloading the personal certificate to the terminal. Here the personal certificate is only downloaded once. The personal certificate further includes the ability to encrypt the content certificate and to unencrypt the already encrypted usage rights encryption. The APM 233 downloads the WIPI content in association with the DRM application 235 and the DRM content 236 as an application for managing the mobile terminal. The DRM modules are all executed in RAM by the APM 233 connected to the WIPI during terminal operation. The DRM Agent 237 is an application mounted on the mobile terminal and performs a DRM related task. The DRM Agent 237 performs a function of checking the personal certificate to determine whether to execute the DRM content in conjunction with the DRM D / L Agent 234. In addition, the DRM Agent 237 includes an XML Parser and an Encryption Library, and can be wirelessly upgraded using the WIPI platform. In addition, both the DRM D / L Agent 234 and the DRM Agent 237 can be written as a DLL for WIPI.

The configuration of the user terminal to which the DRM module is applied consists of configuring the KUN Browser in the OEM to implement various services, including the DRM encryption module on the WIPI for WIPI applications, and configuring the KUN Browser in the OEM. In the form of including DRM encryption module in native for WIPI application in user terminal, configuring KUN Browser in OEM and incorporating DRM encryption module in WIPI for WIPI application and OEM content player in user terminal. KUN Browser in the user terminal and DRM encryption module included in Native for WIPI application and OEM content player in the user terminal, KUN Browser in the WIPI configuration and DRM encryption module in the WIPI for WIPI application in the user terminal. Build KUN Browser on Form and WIPI And it can implement a form of a function module in the DRM encryption modules Native as WIPI eopeulrikeyisyeonreul destination at the user terminal.

3 is a block diagram showing a content providing server according to an embodiment of the present invention.

Referring to FIG. 3, the content providing server may include a memory system 320, at least one central processing unit (CPU) 310, an input device 330, and a communication device coupled to the memory system 320 to perform high-speed operation. 340 may be included.

The central processing unit 310 includes an Arithmetic Logic Unit (ALU) 312 for performing calculations, a register 314 for temporary storage of data and instructions, and a controller 316 for controlling the operation of the transfer service management server. do. The central processing unit 310 includes Digital, Alpha, MIPS Technology, NEC, IDT, Siemens, etc. MIPS, Intel and Cyrix, AMD, and Nexgen. It could be a processor with a variety of architectures, such as the company's x86 and IBM's and Powerola's PowerPC.

The memory system 320 generally includes a high speed main memory 322, a type of storage medium such as random access memory (RAM) and read only memory (ROM), and a floppy disk, a hard disk, a tape, a CD-ROM, a flash memory, and the like. Auxiliary memory 324 in the form of a long-term storage medium and a device for storing data using electrical, magnetic, optical or other storage media. In addition, the main memory 322 may include a video display memory for outputting an image through the display device.

In addition, the input device 330 includes a keyboard, a mouse, and the like. The mouse may include, for example, a physical transducer such as a touch screen or a microphone. The communication device 340 includes a communication interface for communicating with a user terminal, a content providing server, and the like.

4 is a module configuration diagram of a content providing server according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the content providing server stores transmission / reception processing module 432 for processing wired / wireless communication with a DRM server and a user terminal, and provides a content list when a purchase request or a gift request is received from the user terminal. And a content management module 434 for transmitting the purchased content, an authentication processing module 436 for confirming that the user terminal to receive the content is a DRM phone, and a gift short message to be sent to the user terminal for callback access to the content providing server. The message generating module 438 may be included. Looking at the overall configuration of the content providing server according to an embodiment of the present invention through such an application module as follows.

The content providing server may use various operating systems (OS) as the OS of the system. The OS provides a high level command to an API 400 to control the operation of each application module 430.

The content providing server includes a high level command processor 410 that identifies each application module 430 according to a high level command provided from the API 400, decodes the high level command, and provides the high level command to a corresponding place. . The application module controller 420 controls the operation of the application module 430 according to the command provided from the high level command processor 410. That is, the high level command processing unit 410 identifies whether there is an application module 430 corresponding thereto according to the high level command provided through the API 400, and corresponds to the case where the corresponding application module 430 exists. The decoded command is recognized by the application module 430 and transmitted to the corresponding mapping unit or the message transmission is controlled. Here, the application module 430 includes a transmission / reception processing module 432, an authentication processing module 434, a content management module 436, and a message generating module 438. The application module controller 420 includes mapping units 421, 423, 425, and 427 and interface units 422, 424, 426, and 428 for each application module, respectively.

The transmission / reception processing module mapping unit 421 may receive a high level command for performing wired / wireless communication with the content providing server or the user terminal from the high level command processing unit 410, and may process the transmission / reception processing module 432. Maps to a device level command and provides it to the transmit / receive processing module 432 via the transmit / receive processing module interface 422. In addition, the transmission and reception processing module 432 may include a physical transmission interface for data transmission and reception with the content providing server as needed. In this case, the physical transport interface includes a communication interface such as SS7 voice network interworking interface or TCP / IP network interworking interface.

The content management module mapping unit 423 stores content and provides a content list when a purchase request or a gift request is received from a user terminal and transmits the purchased content. In addition, the content management module mapping unit 423 includes a function of storing a user's purchase log and managing billing information. That is, the content management module mapping unit 423 receives a high level command for storing and outputting content from the high level command processing unit 410, and maps it to a device level command that can be recognized by the content management module 434. It is provided to the content management module 434 through the content management module interface 424.

The authentication processing module mapping unit 425 is a part for confirming that the user terminal to receive the content is a DRM phone. That is, the authentication processing module mapping unit 425 receives the high level command for processing the purchase information or the gift information received from the user terminal in the high level command processing unit 410, and the authentication processing module 436 may recognize it. Maps to device level commands and provides them to the authentication processing module 436 via the authentication processing module interface 426.

The message generating module mapping unit 427 is a part for generating a gift short message to be transmitted to a user terminal for accessing a callback to a content providing server. That is, the message generating module mapping unit 427 receives a high level command for generating a short message from the high level command processing unit 410, maps it to a device level command that the message generating module 438 can recognize, and then maps it to a device level command. The message generating module 438 is provided to the message generating module 438 through the message generating module interface 428.

5 is a signal flow diagram illustrating a procedure for purchasing VOD content by a user terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 5, first, a user of a user terminal requests a purchase of VOD content to purchase from a content providing server through a communication network (step 501). The content providing server receiving the purchase request transmits various VOD contents as list information (step 503). The user terminal receiving the content list information selects and purchases one content (step 505), and purchases information including the corresponding VOD content information and the telephone number of the user terminal to receive the purchased VOD content to the content providing server. Transmit (step 507). The content providing server determines that the user terminal is a DRM phone based on the purchase information and applies a DRM content purchasing policy (step 513). The content providing server converts the VOD content to which the DRM content purchase policy is applied and converts the content into DRM Contents Format (DCF Contents Format) content to the user terminal (step 515). If the user terminal does not support the DRM, the content providing server may transmit the VOD content as it is and complete the purchase. The user terminal receiving the DCF content downloads the DCF content (step 517), and transmits a content download completion signal to the content providing server (step 519). The content providing server receiving the content download completion signal confirms that the user terminal that purchased the content is a DRM phone (step 520). The content providing server confirming that the user terminal is a DRM phone stores a purchase log (step 521). Here, the purchase log includes the contract number and the content ID of the content user.

Thereafter, the user terminal, which has been confirmed to be a DRM phone, requests a use right confirmation from the DRM server (step 523). Upon receiving the usage right request signal, the DRM server issues a content key to authenticate the content (step 525) and confirms the user of the VOD content (step 527). In addition, the DRM server requests the content purchase confirmation to the content providing server to authenticate the content purchase of the user (step 529), and receives the content purchase confirmation information of the user terminal from the content providing server (step 531). After the DRM server authenticates the purchase of the VOD content of the user terminal from the purchase confirmation information (step 533), the DRM server transmits the use right of the corresponding VOD content to the user terminal (step 535). The user terminal which has received the usage right may download the usage right and complete the VOD content purchase (step 537). If the DRM server does not authenticate the VOD content purchase, the DRM server may transmit a VOD content repurchase message to the user terminal.

6 is a signal flow diagram illustrating a procedure for presenting VOD content by a user terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 6, first, a user of a user terminal requests a present of a VOD content to a content providing server through a communication network (step 601). The content providing server receiving the gift request transmits various VOD contents as list information (step 603). The user terminal receiving the content list information purchases one VOD content (step 605), and transmits the gift information including the corresponding VOD content information and the phone number of another user terminal to receive the gift to the content providing server ( Step 607). The content providing server determines that the user terminal is a DRM phone based on the gift information and applies a DRM content purchase policy (step 613). The content providing server may convert the VOD content to which the DRM content purchase policy is applied, into DRM Contents Format (DCF) content and transmit the same to the user terminal. Here, when the user terminal does not support DRM, the content providing server may transmit the VOD content as it is. Thereafter, the content providing server transmits a gift text message to another user terminal to transmit DCF content or VOD content (step 615).

7 is a signal flow diagram illustrating a procedure for receiving a VOD content from a user terminal according to an embodiment of the present invention.

Referring to FIG. 7, first, a user terminal receives a gift text message from a content providing server (step 701). The user terminal receiving the gift text message calls back to a content providing server and receives DCF content or VOD content to be presented (steps 703 and 705). The user terminal receiving the DCF content downloads the DCF content (step 707) and transmits a content download completion signal to the content providing server (step 709). Thereafter, the content providing server confirms that the user terminal that purchased the content is a DRM based on the received content ID (step 710). If it is confirmed that the user terminal is a DRM phone, the content providing server stores a purchase log (step 711). Here, the purchase log includes the contract number and the content ID of the content user. In this case, if the user terminal does not support DRM, the user terminal receiving the VOD content may complete the present after downloading the VOD content.

Thereafter, the user terminal which is confirmed that the DRM phone is requested to check the content use authority to the DRM server (step 713). Upon receiving the usage right confirmation request signal, the DRM server issues a content key to authenticate the content (step 715), and confirms the user of the content (step 717). In addition, the DRM server requests the content purchase confirmation to the content providing server to authenticate the content purchase of the user (step 719), and receives the content purchase confirmation information of the user terminal from the content providing server (step 721). After the DRM server authenticates the content purchase of the user terminal from the purchase confirmation information (step 723), the DRM server transmits the use right of the content to the user terminal (step 725). The user terminal that has received the usage right may download the usage right and complete receiving a gift (step 727). If the DRM server does not authenticate the content purchase, the DRM server may transmit a content repurchase message to the user terminal.

The present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention.

According to the present invention can provide a method and apparatus for purchasing VOD content using a DRM-based communication network.

According to the present invention can provide a method and apparatus for sending and receiving VOD content gift using a DRM-based communication network.

According to the present invention, a method and apparatus for safely providing VOD content to a user terminal using a DRM server can be provided.

Claims (27)

A method of providing a VOD content purchase service in a content providing server that is combined with a DRM server and at least one user terminal through a communication network, Receiving a VOD content purchase request signal from the user terminal; Transmitting VOD content list information to the user terminal in response to the VOD content purchase request signal; Receiving purchase information from the user terminal that purchased VOD content using the VOD content list information; Confirming that the user terminal is a DRM phone based on the purchase information; Transmitting the purchased content to the user terminal; Receiving a content download completion signal from the user terminal; And Receiving the content download completion signal and storing a purchase log Method of providing a VOD content purchase service comprising a. The method of claim 1, The purchase information includes VOD content information purchased based on the VOD content list information and an identifier of the user terminal. Method of providing a VOD content purchase service, characterized in that. The method of claim 1, The content transmission step is to transmit the DCF content to the user terminal if the user terminal confirms that the DRM phone Method of providing a VOD content purchase service, characterized in that. The method of claim 1, Receiving a content download completion signal from the user terminal and confirming that the user terminal is a DRM phone; Method of providing a VOD content purchase service, characterized in that. The method of claim 1, The purchase log includes a purchased content ID and a user contract number Method of providing a VOD content purchase service, characterized in that. A method of providing a VOD content purchase service in a DRM server coupled with a content providing server and at least one user terminal through a communication network, Receiving a usage right confirmation request signal from the user terminal; Authenticating content by receiving the usage right request signal; Confirming a user terminal by receiving the usage right request signal; Receiving purchase confirmation information from the content providing server; Authenticating a content purchase based on the purchase confirmation information; And Authenticating the purchase of the content to transmit a use right to the user terminal Method of providing a VOD content purchase service comprising a. The method of claim 6, The DRM server uses an encryption scheme based on OMA (Open Mobile Alliance) 2.0. Method of providing a VOD content purchase service, characterized in that. The method of claim 6, The purchase confirmation information is information of a user terminal including a DRM module using an OMA (Open Mobile Alliance) 2.0 based encryption scheme. Method of providing a VOD content purchase service, characterized in that. In the method for providing a VOD content gift service for presenting VOD content in a content providing server coupled with at least one user terminal through a communication network, Receiving a VOD content present request signal from the user terminal; Transmitting VOD content list information to the user terminal in response to the VOD content present request signal; Receiving gift information from the user terminal purchasing VOD content using the VOD content list information; Generating a gift text message based on the gift information; And Transmitting the gift text message to another user terminal How to provide a VOD content gift service comprising a. The method of claim 9, The gift information includes purchased VOD content information and an identifier of the user terminal. Method of providing a VOD content gift service characterized in that. The method of claim 9, Confirming that the user terminal is a DRM phone based on the gift information; Method of providing a VOD content purchase service, characterized in that. A method of providing a VOD content gift service for receiving VOD content from a content providing server coupled with a DRM server and at least one user terminal through a communication network, Receiving a callback access signal from the user terminal; Transmitting content to the user terminal using a channel formed by the callback access signal; Receiving a content download completion signal from the user terminal; And Receiving the content download completion signal and storing a purchase log How to provide a VOD content gift service comprising a. The method of claim 12, Receiving a content download completion signal from the user terminal and confirming that the user terminal is a DRM phone; Method of providing a VOD content gift service characterized in that. The method of claim 12, The purchase log includes a purchased content ID and a user contract number Method of providing a VOD content gift service characterized in that. A method of providing a VOD content gift service for receiving VOD content from a DRM server coupled with a content providing server and at least one user terminal through a communication network, Receiving a usage right confirmation request signal from the user terminal; Authenticating content by receiving the usage right request signal; Confirming a user terminal by receiving the usage right request signal; Receiving purchase confirmation information from the content providing server; Authenticating a content purchase based on the purchase confirmation information; And Authenticating the purchase of the content to transmit a use right to the user terminal How to provide a VOD content gift service comprising a. The method of claim 15, The DRM server uses an encryption scheme based on OMA (Open Mobile Alliance) 2.0. Method of providing a VOD content gift service characterized in that. The method of claim 15, The purchase confirmation information is information of a user terminal including a DRM module using an OMA (Open Mobile Alliance) 2.0 based encryption scheme. Method of providing a VOD content gift service characterized in that. In the content providing server coupled with the DRM server and at least one user terminal through a communication network to provide a VOD content purchase service, Means for receiving a VOD content purchase request signal from the user terminal; Means for transmitting VOD content list information to the user terminal in response to the VOD content purchase request signal; Means for receiving purchase information from the user terminal that purchased VOD content using the VOD content list information; Means for confirming that the user terminal is a DRM phone based on the purchase information; Means for transmitting the purchased content to the user terminal; Means for receiving a content download completion signal from the user terminal; And Means for receiving the content download completion signal and storing a purchase log Content providing server comprising a. A DRM server coupled with a content providing server and at least one user terminal through a communication network and providing a VOD content purchase service, Means for receiving a usage right confirmation request signal from the user terminal; Means for authenticating content by receiving the usage right request signal; Means for confirming a user terminal by receiving the usage right request signal; Means for receiving purchase confirmation information from the content providing server; Means for authenticating content purchases based on the purchase confirmation information; And Means for authenticating the purchase of the content to transmit a use right to the user terminal DRM server comprising a. A content providing server providing a VOD content presenting service that combines with a DRM server and at least one user terminal through a communication network and presents VOD content. Means for receiving a VOD content present request signal from the user terminal; Means for transmitting VOD content list information to the user terminal in response to the VOD content present request signal; Means for receiving gift information from the user terminal that purchased VOD content using the VOD content list information; Means for generating a gift text message based on the gift information; And Means for transmitting the gift text message to another user terminal Content providing server comprising a. In the content providing server coupled with the DRM server and at least one user terminal through a communication network and providing a VOD content gift service for receiving VOD content, Means for receiving a callback connection signal from the user terminal; Means for transmitting content to the user terminal using a channel formed by the callback connection signal; Means for receiving a content download completion signal from the user terminal; And Means for receiving the content download completion signal and storing a purchase log Content providing server comprising a. In the DRM server coupled with the content providing server and at least one user terminal through a communication network and providing a VOD content gift service for receiving VOD content, Means for receiving a usage right confirmation request signal from the user terminal; Means for authenticating content by receiving the usage right request signal; Means for confirming a user terminal by receiving the usage right request signal; Means for receiving purchase confirmation information from the content providing server; Means for authenticating content purchases based on the purchase confirmation information; And Means for authenticating the purchase of the content to transmit a use right to the user terminal DRM server comprising a. In the content providing server coupled with the DRM server and at least one user terminal through a communication network to provide a VOD content purchase service, A memory in which a program is stored; A processor coupled to the memory to execute the program; The processor by the program, Receiving a VOD content purchase request signal from the user terminal; Transmitting VOD content list information to the user terminal in response to the VOD content purchase request signal; Receiving purchase information from the user terminal that purchased VOD content using the VOD content list information; Confirming that the user terminal is a DRM phone based on the purchase information; Transmitting the purchased content to the user terminal; Receiving a content download completion signal from the user terminal; And Receiving the content download completion signal and storing a purchase log System for running. A DRM server coupled with a content providing server and at least one user terminal through a communication network and providing a VOD content purchase service, A memory in which a program is stored; A processor coupled to the memory to execute the program; The processor by the program, Receiving a usage right confirmation request signal from the user terminal; Authenticating content by receiving the usage right request signal; Confirming a user terminal by receiving the usage right request signal; Receiving purchase confirmation information from the content providing server; Authenticating a content purchase based on the purchase confirmation information; And Authenticating the purchase of the content to transmit a use right to the user terminal System for running. A content providing server providing a VOD content presenting service that combines with a DRM server and at least one user terminal through a communication network and presents VOD content. A memory in which a program is stored; A processor coupled to the memory to execute the program; The processor by the program, Receiving a VOD content present request signal from the user terminal; Transmitting VOD content list information to the user terminal in response to the VOD content present request signal; Receiving gift information from the user terminal purchasing VOD content using the VOD content list information; Generating a gift text message based on the gift information; And Transmitting the gift text message to another user terminal System for running. In the content providing server coupled with the DRM server and at least one user terminal through a communication network and providing a VOD content gift service for receiving VOD content, A memory in which a program is stored; A processor coupled to the memory to execute the program; The processor by the program, Receiving a callback access signal from the user terminal; Transmitting content to the user terminal using a channel formed by the callback access signal; Receiving a content download completion signal from the user terminal; And Receiving the content download completion signal and storing a purchase log System for running. In the DRM server coupled with the content providing server and at least one user terminal through a communication network and providing a VOD content gift service for receiving VOD content, A memory in which a program is stored; A processor coupled to the memory to execute the program; The processor by the program, Receiving a usage right confirmation request signal from the user terminal; Authenticating content by receiving the usage right request signal; Confirming a user terminal by receiving the usage right request signal; Receiving purchase confirmation information from the content providing server; Authenticating a content purchase based on the purchase confirmation information; And Authenticating the purchase of the content to transmit a use right to the user terminal System for running.

Images