KR101700101B1 - System for providing VOD service and processing method thereof - Google Patents

Abstract

The present invention relates to a video-on-demand service providing system and a method of operating a video-on-demand service for allowing a mobile terminal to receive an on-demand video service through a wireless LAN such as a Wi-Fi network as well as a mobile communication network. The authentication server performs user authentication by decrypting encrypted user information transmitted from a portable terminal requesting a service through a first network in which a plurality of portable terminals share a public IP, The server receives the service request for the content or the real-time broadcast data from the portable terminal through the network, and provides the service information to the portable terminal to receive the requested service. The first network-based streaming server receives the service information In accordance with the streaming request of the portable terminal, Streaming contents or real-time broadcast data using a TCP scheme through a work.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and a method for providing video-on-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video-on-demand (VOD) providing system and a method of operating the same, and more particularly, And to a method of operating the system.

Recently, a smart phone equipped with a high-performance processor such as a PC and a large-capacity memory and a user can freely install and use an application has appeared.

Such a smart phone is an intelligent terminal that integrates data communication functions such as schedule management, fax transmission / reception, and internet access to a mobile phone function, and is capable of directly accessing the Internet using a wireless Internet, The ability to access the application, the ability to customize the application for the user, the ability to customize the interface by installing various applications, and the ability to share applications between smartphones with the same operating system (OS). The mobile phone market is rapidly eroding due to the advantages that conventional mobile phones have not had.

Users of smartphones can use high-speed Internet services wirelessly through a mobile communication network including W-CDMA, CDMA2000, EV-DO, LTE, LTE_Advanced, Wibro or wireless LAN called Wi-Fi.

Wi-Fi network that can use high-speed internet service free of charge according to the spread of such smartphone is attracting attention as well. Accordingly, in order to improve user satisfaction and secure service competitiveness, various services provided through existing mobile communication network There is also a need to provide Wi-Fi networks.

As a representative service provided through the existing mobile communication network, for example, a VOD service can be selected and downloaded or streamed.

However, in the case of Wi-Fi networks, NAT (Network Address Translation) and AP (Access Point), which are produced and supplied by various sellers, are installed. The portable terminal is allocated a public IP through NAT. Generally, since the public IP address band managed by the NAT is finite, one public IP is commonly used by various portable terminals.

In such a Wi-Fi environment, if the existing UDP-based RTP / RTSP scheme is applied, a NAT may cause a transmission error due to a block in the firewall or the like, and smooth streaming service can not be provided .

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the conventional problems, and it is an object of the present invention to provide an on-demand video service providing system and a method of operating the on-demand video service, in which a portable terminal can receive an on-demand video service not only on a mobile communication network but also on a wireless LAN such as a Wi- .

In order to solve the problem, the present invention provides a method for authenticating a first user who decrypts encrypted user information transmitted from a portable terminal requesting a service through a first network in which a plurality of portable terminals share a public IP, Network based authentication server; A first network-based delivery server for receiving a service request for content or real-time broadcast data from a portable terminal through a first network, and providing service information for receiving the requested service to the portable terminal; And a first network-based streaming server for streaming content or real-time broadcasting data through a first network over a first network in accordance with a streaming request of the mobile terminal provided with the service information.

In the video-on-demand service providing system according to the present invention, the first network may include a Wi-Fi network.

The system for providing video-on-demand service according to the present invention is configured to receive a service request for content or real-time broadcasting data from a portable terminal through a second network not using a public IP and configure service information for receiving a requested service A second network-based delivery server for providing to a portable terminal; And a second network-based streaming server for streaming content or real-time broadcast data using a UDP scheme to a portable terminal accessed using service information through a second network.

In the video-on-demand service providing system according to the present invention, the second network may include a mobile communication network for providing a call and a wireless Internet service to a portable terminal.

The system for providing video-on-demand service according to the present invention is a system for providing video-on-demand service to a portable terminal through a first network or a second network by taking physical files of contents requested for service based on terminal information of a portable terminal accessed using service information And a content download server for downloading.

The video-on-demand service providing system according to the present invention further includes a progressive download server for downloading a physical file of large-capacity content from a content repository and downloading the large-capacity content through a first network or a second network in a progressive manner to a portable terminal supporting progressive download .

The video-on-demand service providing system according to the present invention further includes a content distribution server for storing information on serviceable contents or physical files in a content information DB and a content repository.

The video-on-demand service providing system according to the present invention further includes a product page server configured to provide a page for providing information on content registered as a serviceable product and providing the page to the portable terminal through the first network or the second network.

The video-on-demand service providing system according to the present invention further includes a billing server for generating and storing a log for charging the service provided to the portable terminal.

The video-on-demand service providing system according to the present invention further includes a real-time broadcasting server for acquiring video data and audio data of real-time broadcasting and providing the same to a first network-based streaming server and a second network-based streaming server.

The system for providing video-on-demand service according to the present invention is a system for providing an SMS service for interfacing with an SMS server performing a text message service and transmitting a text message for at least one of gifts, Server.

In the system for providing video-on-demand service according to the present invention, a first network-based streaming server providing a streaming service to a mobile terminal through a first network, in which a plurality of mobile terminals share a public IP, A network interface module for communicating data to transmit and receive data; A session management module for confirming the user authentication through the user information management server and acquiring session information; A stream reading module for fetching service-requested content from the content repository on a frame-by-frame basis based on the acquired session information; A protocol management module for performing RTSP signaling, RTP over TCP packet transmission, and RTCP flow control on data transmitted and received through a network interface module to provide streaming and real-time streaming service through a TCP scheme; And a system interface module for transmitting and receiving data to and from the user information management server in response to a request from the session management module.

In a video-on-demand service providing system according to the present invention, a plurality of portable terminals, in cooperation with a streaming server for providing a streaming service, provide a real-time broadcast service to a portable terminal through a first network sharing a public IP A capture module for capturing video data and audio data of real-time broadcasting; An encoder module for encoding the captured video data and audio data in a format reproducible by a portable terminal; A transmission module for packetizing the encoded video data and audio data in an RTP format and transmitting the packetized data to the first network-based streaming server; An RTSP server module for connecting an RTSP session with a portable terminal requesting real-time broadcasting through a first network-based streaming server and transmitting information about media that can be transmitted; A structure information management module for managing information on a broadcast source and an output; A schedule management module for managing schedule information of real-time broadcasting; And a DB management module for acquiring information on sources and outputs and schedule information from the DB.

In the real-time broadcast server according to the present invention, the capture module further performs downsizing and resolution conversion on the captured video data in accordance with specifications of the portable terminal.

According to another aspect of the present invention, there is provided an operation method of a system for providing a video-on-demand service to a portable terminal through a first network shared by a plurality of portable terminals, Providing a product page including information on contents registered as a commodity serviceable by a portable terminal through a first network; Transmitting the corresponding streaming information after recording the session according to the streaming information request from the portable terminal provided with the product page, by the first network-based delivery server; When the first network-based streaming server receives the DESCRIBE request from the portable terminal that has received the streaming information, transmitting the DESCRIBE response after confirming the user authentication; The first network-based streaming server establishing a setup and transmitting a SETUP response when receiving a SETUP request from a portable terminal that has received a DESCRIBE response; The first network-based streaming server receives the PLAY request from the portable terminal that has received the SETUP response, transmits the PLAY response, and then obtains the requested content and streams the received content to the portable terminal through the TCP method; And the first network-based streaming server terminating the session by the TEARDOWN request or the disconnection from the portable terminal and recording the log for the streaming service. .

In the method of operating a system for providing video-on-demand service according to the present invention, the step of transmitting a DESCRIBE response includes receiving a DESCRIBE request from a mobile terminal by a network interface module of a first network-based streaming server, The session management module requesting user authentication to the user information management server through the system interface module and confirming the user authentication, and when the user authentication is confirmed, the session management module acquires the service information from the session DB, And constructing a DESCRIBE response based on one service information and transmitting the DESCRIBE response to the portable terminal through the network interface module.

In the method of operating a video service providing system according to the present invention, the step of transmitting a SETUP response may include receiving a SETUP request from a mobile terminal of the first network-based streaming server and transmitting a SETUP method to the protocol management module The RTP / AVP / TCP transport setup is performed by the protocol management module, and the protocol management module configures the SETUP response and transmits the SETUP response to the portable terminal through the network interface module.

In the method of providing video-on-demand service according to the present invention, the step of streaming to a mobile terminal includes receiving a PLAY request from a mobile terminal and delivering the PLAY request to a session management module, The module requesting media data from a stream read module; The stream reading module acquiring media data from a content repository, extracting data for each frame, and transmitting the extracted data to the protocol management module; The protocol management module packetizing frame-by-frame data in the form of RTP over TCP; And the protocol management module transmitting the packetized data as RTSP embedded binary data to the portable terminal.

A method of operating a video-on-demand service system according to the present invention includes the steps of: initializing a capture module, an encoder module, a transmission module, and an RTSP server module in a real-time broadcasting server and obtaining broadcasting schedule information; Transitioning the capture module, the encoder module, and the transmission module to an operable state; Capturing video data and audio data of a real-time broadcasting captured by a capture module transited to an operable state and transmitting the captured video data and audio data to an encoder module; Encoding the transferred video data and audio data in a format reproducible by a portable terminal and transmitting the encoded video data and audio data to a transmission module; Packetizing the encoded video data and audio data in an RTP format reproducible by a portable terminal, and transmitting the generated packet in a multicasting manner; And a step in which the streaming server based on the first network connects a session with a real-time broadcast server at the request of the mobile terminal and acquires a packet transmitted by the transmission module in the form of joining the multicast group to the mobile terminal .

The system for providing video-on-demand service and the method of operating the same according to the present invention are capable of streaming content and real-time broadcast data while providing content downloading, progressive downloading, streaming, and real- Through the UDP method, which is relatively fast, and the TCP method that can guarantee the transmission through the Wi-Fi network, the on-demand video service provided through the mobile communication network can be transmitted through the Wi-Fi network In addition, it is possible to further provide a high-quality video-on-demand service, thereby providing an excellent effect of improving user satisfaction and service competitiveness.

1 is a diagram illustrating a network structure to which a video-on-demand service providing system according to the present invention is applied.
FIG. 2 is a block diagram of a video-on-demand service providing system according to the present invention.
FIG. 3 is a diagram illustrating a server-to-server network interworking structure of a video-on-demand service providing system according to the present invention.
4 is a message flow diagram illustrating a content delivery process in a video-on-demand service providing system according to the present invention.
5 is a message flow diagram illustrating a content download process in the video-on-demand service providing system according to the present invention.
FIG. 6 is a message flow diagram illustrating a content streaming process through a mobile communication network in a video-on-demand service providing system according to the present invention.
FIG. 7 is a block diagram illustrating a detailed configuration of a first network-based streaming server in a video-on-demand service providing system according to the present invention.
8 to 10 are a message flow diagram illustrating a streaming process through a wireless LAN in a video-on-demand service providing system according to the present invention.
11 is a block diagram showing a detailed configuration of a real-time broadcast server in a video-on-demand service providing system according to the present invention.
12 is a message flow diagram illustrating an operation of a real-time broadcast server in a video-on-demand service providing system according to the present invention.
FIG. 13 is a message flow diagram illustrating an interworking operation between a real-time broadcasting server and first and second network-based streaming servers in a video-on-demand service providing system according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

1 is a diagram illustrating a network system in which a video-on-demand service according to the present invention is provided.

Referring to FIG. 1, a system 100 for providing a video-on-demand service according to the present invention provides content downloading, content streaming, and real-time broadcast service to a mobile terminal 300 through a network 400.

Here, the network 400 is for providing a wireless Internet access service to the portable terminal 300, and it is a network 400 that provides a large capacity data transmission / reception service and an uninterrupted data service over an Internet protocol (WiBro), a wired communication network, a mobile communication network, a High Speed Downlink Packet Access (HSDPA) network including a Wibro (Wireless Broadband) network and an All- ) Network and a satellite communication network, and in addition, it can be a next generation communication network to be developed in the future. In particular, the access network to which the portable terminal 300 is connected may be a Wibro network, a 2G / 3G mobile communication network, or a Wi-Fi network. The Wi-Fi network includes a plurality of wireless access points (APs) 210, and provides a wireless Internet access service to a mobile terminal 300 located within a predetermined distance from each wireless AP 210. The present invention particularly includes a first network in which a plurality of portable terminals 300 share a public IP with an access network on the portable terminal 300 side and a second network that does not use public IP.

The portable terminal 300 is connected to the video-on-demand service providing system 100 according to the present invention through the network 400 to download, stream and reproduce contents selected by the user, receive and reproduce real-time broadcast data . For this, the portable terminal 300 must have a wireless Internet access function, and may include a high-performance hardware specification capable of smoothly reproducing high-quality contents according to circumstances. Particularly, the portable terminal 300 may be a wireless Internet access function, and may include at least one of a 2G / 3G mobile communication network, a communication module that performs wireless communication through a WiBro network, and a communication module that performs wireless communication through a Wi- . ≪ / RTI > The portable terminal 300 may be implemented in various forms. For example, a digital broadcasting receiver such as a notebook computer, a mobile phone, navigation, a smart phone, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player) . ≪ / RTI > Of course, this is merely an example, and the portable terminal 300 should be interpreted as a concept including a device that is currently developed, commercialized, or capable of all communication to be developed in the future.

The video-on-demand service providing system 100 according to the present invention provides at least one of a download service and a streaming service for content and a real-time broadcast service. In particular, in a streaming service, a plurality of portable terminals share a public IP 1 provides a streaming service using a TCP scheme that guarantees data delivery based on packet exchange over a network and a UDP scheme that provides a relatively fast and less overhead through a second network that does not use a public IP Provide streaming service. Here, the first network includes a Wi-Fi network and the second network includes a mobile communication network. Hereinafter, a case of a Wi-Fi network and a mobile communication network will be described as an example.

In addition, the video-on-demand service providing system 100 according to the present invention can provide QVGA-quality high-quality content when connected to a Wi-Fi network capable of providing a sufficient transmission bandwidth, And provides a progressive download service for progressively downloading a large amount of content according to the availability of download support.

FIG. 2 is a block diagram illustrating a detailed configuration of a video-on-demand service system 100 according to the present invention. Referring to FIG. 2, the configuration and operation of the video-on-demand service system 100 will be described in detail.

2, a video-on-demand service providing system 100 according to the present invention includes a content distribution server 105, a product page server 110, a second network-based delivery server 115, a content download server 120, A progressive download server 125, a first network based authentication server 130, a billing server 135, an SMS interworking server 140, a second network based streaming server 145, a first network based streaming server 150, A first network-based delivery server 155, and a real-time broadcast server 160.

The content distribution server 105 distributes the product information and the physical file for the serviceable content. More specifically, in response to a product registration request for content provided by a content provider, a physical file of the content is stored in a content repository (not shown), and product information about the content is stored in the product information DB. Here, the product information includes at least one of resolution information (QVGA, HVGA, VGA, etc.) of the content, and progressive support.

The product page server 110 constitutes a page including information on content registered as a serviceable product and provides the page to the portable terminal 300. [ At this time, the product page server 110 can divide product pages for the mobile communication network and the Wi-Fi network, and can provide the corresponding product page according to the connection path of the mobile terminal 300. The product page may provide a list of contents registered as a serviceable product to the user and a description of each content.

The second network-based delivery server 115 receives the service request from the portable terminal 300 connected through the mobile communication network and provides the service information for receiving the requested service. More specifically, the second network-based delivery server 115 receives a service request for an arbitrary content from the content list provided by the goods page server 110, and transmits information about the requested content, ) And generates service information (DD: Download Description, streaming URL information) for receiving the requested contents and provides the service information to the portable terminal 300. In addition, the second network-based delivery server 115 may determine whether the requested service is available in cooperation with the external server, determine a limit to be handled in connection with the provision of the requested service, inquire / And perform counting on the area.

The content download server 120 downloads the content requested to the portable terminal 300. Based on the service information received by the portable terminal 300 that has received the service information provided from the second network-based delivery server 115 or the first network-based delivery server 155, The mobile terminal 300 obtains the terminal information of the portable terminal 300, reads the physical file of the content based on the obtained terminal information, downloads the physical file, downloads the download result, Create a log.

The progressive download server 125 provides progressive downloading of a large amount of content to the portable terminal 300. [ Progressive downloading can be provided to a mobile terminal supporting progressive downloading, which is a technique for posting contents in order to reduce a viewing delay of a user for large-capacity contents, 1 network-based delivery server 155 through the terminal information inquiry.

The first network-based authentication server 130 performs user authentication when the portable terminal 300 accesses via the Wi-Fi network. In addition, the first network-based authentication server 130 decrypts the encrypted user information for security of the terminal.

The billing server 135 performs a billing process for a service (content download, content streaming, real time broadcast streaming, etc.) provided to the mobile terminal 300 through the mobile communication network and the Wi-Fi network. More specifically, a billing log is generated so that billing is possible for the completed service.

The SMS interworking server 140 interlocks with an SMS server (not shown) performing a text message service, and supports a gift for contents, a reservation download service, and an exception process. More specifically, when there is a request from a portable terminal 300, a reservation download or the like, or when an exceptional process occurs during service provision, a related text message is configured and transmitted to a corresponding portable terminal through the SMS server .

The second network-based streaming server 145 and the first network-based streaming server 150 provide streaming services of content and real-time broadcast data to the portable terminal 300 through the mobile communication network and the Wi-Fi network, respectively. The streaming service procedure of the second network-based streaming server 145 and the first network-based streaming server 150 are basically similar to each other. However, the second network-based streaming server 145 transmits the UDP method through the mobile communication network , And the first network-based streaming server 150 performs streaming using the TCP (more specifically, TCP interleaving) method through the Wi-Fi network. In addition, the second network-based streaming server 145 and the first network-based streaming server 150 can transmit the content in the H.264 format and the real-time broadcast data encoded in the real-time broadcast server 160 through the mobile communication network and the Wi- And real time streaming service to the portable terminal 300.

The first network-based delivery server 155 receives the service request from the portable terminal 300, inquires the terminal information and the content information when the portable terminal 300 accesses through the Wi-Fi network, And provides the service information to the mobile terminal 300. The first network-based delivery server 155 performs substantially the same function as the second network-based delivery server 115. [ In addition, the first network-based delivery server 155 may further control the transmission bandwidth according to the communication environment of the portable terminal 300, considering that the transmission bandwidth of Wi-Fi is variable.

The real-time broadcasting server 160 captures a broadcasting signal according to a broadcasting schedule for real-time broadcasting service to generate encoded data, encodes the encoded data, and transmits the encoded data to the second network-based streaming server 145 and the first network- To the server (150).

FIG. 3 is a diagram illustrating a network interworking structure of each server provided in the video-on-demand service system 100 according to the present invention shown in FIG. In FIG. 3, reference numerals 165, 170, and 175 denote a content information DB, a session DB, and a content repository, respectively. The content information DB 165 stores and manages serviceable content lists and related information, ) Stores and manages the session information of the portable terminal 300 providing the service. The content repository 170 stores the physical file of the content to be served. For example, the content repository 170 is implemented as a NAS (Network-attached storage) .

Referring to FIG. 3, a physical file of contents registered and distributed by the product distribution server 105 is stored in the content repository 175, and the list and information thereof are stored in the content information DB 165.

The product page server 110 forms a product page based on the content list stored in the content information DB 165 and related information, and transmits the serviceable product to the portable terminal 300 accessed through the mobile communication network and the Wi-Fi network Provide information. When the second network-based delivery server 115 or the first network-based delivery server 155 receives a service request according to the type of the communication network to which the portable terminal 100 is connected, Provides the service information to the portable terminal 300, and stores the session information of the portable terminal 300 in the session DB 170. In addition, when the mobile terminal 300 accesses the Wi-Fi network, the first network-based authentication server 130 performs user authentication and decryption of the encrypted user information. The portable terminal 300 having received the service information from the second network-based delivery server 115 or the first network-based delivery server 155 receives the service information from the content download server 120, the progressive download server 120, The first network-based streaming server 125, the second network-based streaming server 145, and the first network-based streaming server 150 to request downloading or streaming. The content download server 120 and the progressive download server 125 fetch the physical file of the corresponding content from the content repository 175 according to the service request of the portable terminal 300 and transmit the physical file of the content through the mobile communication network and the Wi- 300). The second network-based streaming server 145 and the first network-based streaming server 150 may retrieve the physical file of the corresponding content from the content repository 175 according to the service request of the portable terminal 300, And then streams the encoded broadcast data to the portable terminal 300 through the mobile communication network or the Wi-Fi network. The log information about the download / streaming service executed in the content download server 120, the progressive download server 125, the second network-based streaming server 145 and the first network-based streaming server 150 is transmitted to the billing server 135 ) Collects and generates a billing log. Subsequently, a billing process can be performed based on the generated billing log.

The operation of the video-on-demand service system 100 described below can be more easily understood based on the network interworking structure shown in FIG.

4 is a message flow diagram illustrating a content delivery process in a video-on-demand service providing system according to the present invention.

Referring to FIG. 4, the portable terminal 300 can request a service by selecting a specific content through a product page provided by the goods page server 110, and the service request is transmitted to the network Network-based delivery server 115 or the first network-based delivery server 155 according to the mobile-network or Wi-Fi network (S110).

The second network delivery server 115 or the first network-based delivery server 155 may request and receive terminal information from an external user information management server 405 when receiving a service request from the portable terminal 300 S 115), and requests content information DB 155 optimized based on the received terminal information (S 120). For example, when the portable terminal 300 can reproduce high-quality contents, it requests high-quality contents information. When the portable terminal 300 supports the progressive download function, it requests content information for progressive download.

In addition, the second network-based delivery server 115 may inquire and receive various information from the external server in order to check whether the portable terminal 300 requested the service can be serviced.

For example, when the subscriber is subscribed to a limit-rate service that allows only a user to use a limit, the second network-based delivery server 115 or the first network-based delivery server 155 may limit the limit to the limit management server 410 And performs a deduction inquiry (S125).

As another example, when the user subscribes to a free service provided free of charge in a certain area, the second network-based delivery server 115 or the first network-based delivery server 155 can download (S130).

If the subscriber is not subscribed to the limit-rate service or the free-service service, the user can select a payment method for the service. At this time, Based delivery server 155 inquires the point management server 420 of the user's remaining point and receives the remaining point (S135).

The second network-based delivery server 115 or the first network-based delivery server 155 determines whether the service is available based on the inquired information, and transmits the corresponding content to the content information DB 155 And receives routing information for downloading (S140). Then, the session information about the mobile terminal 300 requesting the service is stored in the session DB 170 (S145).

Finally, based on the received routing information, a DD for the corresponding content is generated and transmitted to the mobile terminal 300 (S150).

Then, the portable terminal 300 requests downloading to the content download server 120 or the progressive download server 125 with reference to the received DD according to the input of the user, and then receives the content.

In the video-on-demand service providing system according to the present invention, the content download service is equally provided to both the mobile communication network and the Wi-Fi network regardless of the type of the communication network. The content download server 120 and the progressive The download server 125 is distinguished according to whether or not the provided content is capable of progressive download, and the basic operation is the same.

5 is a message flow diagram illustrating a content download process in the video-on-demand service providing system according to the present invention.

5, the mobile terminal 300 receiving the service information DD from the second network delivery server 115 or the first network-based delivery server 155 receives the service information received according to the input of the user, The content download server 120 or the progressive download server 125 (S200).

Upon receipt of the download request, the content download server 120 or the progressive download server 125 inquires and confirms the session information in the session DB 170, and retrieves the corresponding content from the content repository 175 based on the inquiry (S210) . Then, the mobile terminal 300 transmits the fetched content to the mobile terminal 300 (S215).

Next, FIG. 6 is a message flow diagram illustrating a content streaming process in the video-on-demand service providing system according to the present invention.

6, the mobile terminal 300 accesses the goods page server 110 through the mobile communication network or the Wi-Fi network, requests the goods page, and receives the goods page in response to the goods page (S305).

When the user who has confirmed the product page requests streaming of specific content, the mobile terminal 300 transmits streaming information for streaming the content to the second network-based delivery server 115 or the first network-based delivery server 155 (S310).

The second network-based delivery server 115 or the first network-based delivery server 155 records the session information in the session DB 170 (S315), and then transmits the streaming URL information to the portable terminal 300 (S320) .

RTSP OPTIONS and response messages are exchanged between the mobile terminal 300 and the second network-based streaming server 145 or the first network-based streaming server 150 based on the received streaming URL information, and the mobile terminal 300 And requests streaming through the RTSP DESCRIBE message to the second network-based streaming server 145 or the first network-based streaming server 150 (S330).

The second network-based streaming server 145 or the first network-based streaming server 150 transmits the IP authentication and the MIN (Mobile Identification Number) to the user information management server 405 for the user authentication, And receives the authentication result and the MIN information (S335).

In addition, the second network-based streaming server 145 or the first network-based streaming server 150 inquires the session information in the session DB 170 to acquire session information previously recorded by the first and second network delivery servers 155 and 115 (S340).

If the authentication is successful, the second network-based streaming server 145 or the first network-based streaming server 150 obtains content to be streamed from the content repository 175 based on the searched session information (S 345) .

After acquiring the content, the second network-based streaming server 145 or the first network-based streaming server 145 transmits a DESCRIBE response message to the portable terminal 300 to notify that the request is accepted (S355).

After the RTSP SETUP request and response, RTSP PLAY request and response are made between the portable terminal 300 and the first and second network-based streaming servers 150 and 145 according to the RTSP standard, the first and second network- 150, and 145 stream the acquired content to the mobile terminal 300 (S370). At this time, the first network-based streaming server 150 performs the streaming using the TCP method, and the second network-based streaming server 145 performs the streaming using the UDP method.

If the TEARDOWN request or the DISCONNECTION occurs, the second network-based streaming server 145 or the first network-based streaming server 150 ends streaming (S375) and records a log of the content streaming service (S380).

Accordingly, the mobile terminal 300 can receive the content streaming service through the Wi-Fi network as well as the mobile communication network.

FIG. 7 is a block diagram illustrating a detailed configuration of a first network-based streaming server 150 in a video-on-demand service providing system according to the present invention.

7, the first network-based streaming server 150 includes a network interface module 151, a session management module 152, a stream reading module 153, a protocol management module 154, Module 155. < / RTI >

The network interface module 151 communicates with the portable terminal 300 through the first network, i.e., the Wi-Fi network, and transmits and receives data.

The session management module 152 confirms the user authentication through the external user information management server 405 and acquires the session information.

The stream reading module 153 fetches the corresponding content from the content repository 175 based on the acquired session information.

The protocol management module 154 performs protocol processing for providing streaming and real-time streaming service through the TCP method, and more specifically, performs RTSP signaling, RTP packet transmission, and RTCP flow control, and more particularly, And inserts the RTP / RTCP packet into the RTSP channel and transmits the RTP / RTCP packet. To this end, the protocol management module 154 includes a TCP module, an RTP / RTCP module, and an RTSP module.

The system interface module 155 is for performing communication with an external server, more specifically, the user information management server 405.

The streaming service process through the first network-based streaming server 150 configured as described above will be described with reference to the message flow diagrams of FIGS. 8 to 10. FIG.

8 to 10 are a message flow diagram illustrating a streaming process through a wireless LAN in a video-on-demand service providing system according to the present invention.

Referring to FIG. 8, similar to steps S305 to S330 shown in FIG. 6, based on the streaming URL information acquired by the mobile terminal 300 that has obtained the streaming URL information from the first network-based delivery server 155 And transmits an RTSP DESCRIBE request message requesting streaming to the first network-based streaming server 150 (S400).

The RTSP DESCRIBE request message is received through the network interface module 151 and transmitted to the session management module 152 (S405).

The session management module 152 requests the user information management server 405 to authenticate the user through the system interface module 155 and receives the user authentication result from the user information management server 405 in operation S420.

When the user authentication is completed, the session management module 152 requests service information (session information) to the session DB 170 and receives the service information (session information) (S430, S435).

In step S445, the session management module 152 transmits a DESCRIBE response message to the mobile terminal 300 through the network interface module 151 after configuring a response message based on the received service information in step S440.

Referring to FIG. 9, the mobile terminal 300 having received the RTSP DESCRIBE response message requests the RTSP SETUP request to the first network-based streaming server 150 (S500).

The RTSP SETUP request is received by the network interface module 151, and the network interface module 151 transfers the RTSP SETUP method to the RTSP module of the protocol management module 154 (S505).

Then, the RTP / AVP / TCP transport setup is performed in the RTSP module of the protocol management module 154 (S510), and a response to the setup request is configured and transmitted to the mobile terminal 300 through the network interface module 151 (S515, S520).

When the setup is completed, streaming is performed according to a PLAY request from the mobile terminal 300, as shown in FIG.

10, the RTSP PLAY request according to the user's input from the portable terminal 300 is transmitted to the protocol management module 154 of the first network-based streaming server 150 (S600) The session management module 154 delivers the PLAY request to the session management module 152 (S605).

In response to the PLAY request, the session management module 152 inquires the session related to the request, and if it is legitimate, transmits a PLAY response to the mobile terminal 300 through the protocol management module 154 (S610, S615) And transmits the media data for the corresponding content to the stream reading module 153 (S620). The stream reading module 153 requests media data corresponding to the content to the content repository 175 and fetches the data in steps S625 and S630 and extracts the data for each frame to the protocol management module 154 in operation S635. . The protocol management module 154 packetizes frame-specific data into RTP over TCP packets, converts the frame-based data into RTSP embedded binary data through an RTSP module, and transmits the RTSP embedded binary data to the mobile terminal 300 in operation S640 and S645.

Accordingly, the portable terminal 300 can stream the contents desired by the user for each frame and play the contents.

Lastly, a real-time broadcasting service provided by a video-on-demand service providing system according to the present invention will be described. The real-time broadcasting service is a service for capturing broadcast data in real time and providing it to the mobile terminal 300.

11 is a block diagram showing a detailed configuration of a real-time broadcasting server 160 in a video-on-demand service providing system according to the present invention.

11, the real-time broadcasting server 160 of the present invention includes a capture module 161, an encoder module 162, a transmission module 163, an RTSP server module 164, A schedule management module 166, and a DB management module 167.

The capture module 161 captures video data and audio data of the broadcast and performs downsizing and resolution conversion on the captured video signal so that the portable terminal 300 can reproduce the video data and the audio data.

The encoder module 162 encodes the video and audio data captured by the capture module 161 into a format that can be reproduced by the portable terminal 300.

The transmission module 163 packetizes the video / audio data compressed by the encoder module 162 into an RTP format that can be reproduced by the portable terminal 300, and then encodes the video / audio data in the UDP protocol to the second network- To the first network-based streaming server (150).

The RTSP server module 164 connects a session with an external application requesting real-time broadcast and transmits information about the media that can be transmitted.

The structure information management module 165 manages information on a broadcast source and an output.

The schedule management module 166 manages schedule information of real-time broadcasting.

The DB management module 167 acquires and provides information on the source and the output and the schedule information in connection with the DB.

12 is a message flow diagram illustrating the operation of the real-time broadcasting server 160 described above.

12, the real-time broadcasting server 160 initializes the capture module 161, the encoder module 162, the transmission module 163, and the RTSP server module 164, (166) and the DB management module 167 (S700).

In step S705, the real-time broadcasting server 160 transitions the capture module 161, the encoder module 162, and the transmission module 163 to an operable state to start the real-time broadcasting service.

Thereafter, the capture module 161 transited to the operable state captures video data and audio data of real-time broadcasting (S710), resamples the captured video data, and converts the size and resolution (S715).

Then, the resampled video data and audio data are transmitted to the encoder module 162 (S720).

The encoder module 162 encodes the transferred video data and audio data in a format reproducible by the portable terminal 300 (S725), and transmits the encoded data to the transmission module 163 (S730).

The transmission module 163 packetizes the encoded video data and audio data into the RTP format reproducible by the portable terminal 300 (S735), and emits the generated packet in the UDP protocol and broadcasts the packet in operation S740.

Accordingly, the side requesting the real-time broadcasting service, that is, the second network-based streaming server 145 and the first network-based streaming server 150 may connect the RTSP session with the real-time broadcasting server 160, 163, and then streams the real-time broadcast data to the mobile terminal 300. [ At this time, the real-time broadcasting server 160 transmits encoded and packetized data in a multicast manner, and the second network-based streaming server 145 and the first network-based streaming server 150 form a form to join the multicast group Time broadcast data to be transmitted.

The second network-based streaming server 145 and the first network-based streaming server 150 transmit and receive RTSP messages between the mobile terminal 300 and the real-time broadcast server 160 accessed through the mobile communication network and the Wi-Fi network, respectively And provides the real-time broadcast data transmitted from the real-time broadcast server 160 to the mobile terminal 300.

13 is a flowchart illustrating a method of providing a video-on-demand service according to an embodiment of the present invention. Referring to FIG. 13, a real-time broadcast server 160 and a second network-based streaming server 145 / FIG. 2 is a message flow diagram illustrating a process of providing a real-time broadcast service.

Referring to FIG. 13, when the portable terminal 300 transmits an RTSP DESCRIBE request, the second network-based streaming server 145 and the first network-based streaming server 150, when the requested service is a real- And transmits the DESCRIBE request to the real-time broadcast server 160 (S800, S805). The real-time broadcasting server 160 processes the RTSP DESCRIBE request message and transmits a response message to the portable terminal 300 through the second network-based streaming server 145 / the first network-based streaming server 150 (S810, S815).

Thereafter, an RTSP setup request and response, an RTSP PLAY request and a response are sequentially transmitted between the mobile terminal 300 and the real-time broadcasting server 160 through the second network-based streaming server 145 / (S820-855). The real-time broadcasting server 160 transmits the RTP stream data of the requested broadcasting data to the second network-based streaming server 145 / the first network-based streaming server 150 in a multicasting manner (S860).

The second network-based streaming server 145 / the first network-based streaming server 150 transmits the RTP streaming data transmitted in the multicasting mode to the mobile terminal 300 requesting the service in a unicasting manner (S865) . At this time, the RTP streaming data is transmitted in a TCP format to guarantee transmission to the mobile terminal 300.

Accordingly, the portable terminal 300 can receive and reproduce real-time broadcast data.

The second network-based streaming server 145 / the first network-based streaming server 150 may transmit an RTSP TEARDOWN request for requesting service termination from the mobile terminal 300 according to the input of the user, The real-time broadcasting server 160 cancels the associated session and transmits the session through the second network-based streaming server 145 / the first network-based streaming server 150 And transmits a response message to the terminal 300 (S870 to S885).

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art. Furthermore, although specific terms are used in this specification and the drawings, they are used in a generic sense only to facilitate the description of the invention and to facilitate understanding of the invention, and are not intended to limit the scope of the invention.

The system for providing video-on-demand service and the method of operating the same according to the present invention are capable of streaming content and real-time broadcast data while providing content downloading, progressive downloading, streaming, and real- Through the UDP method, which is relatively fast, and the TCP method that can guarantee the transmission through the Wi-Fi network, the on-demand video service provided through the mobile communication network can be transmitted through the Wi-Fi network In addition, it is possible to provide a high-quality video-on-demand service in addition to that, it is possible to improve user satisfaction and service competitiveness.

100: On-demand video service delivery system
200: Network
300:
105: Content distribution server
110: product page server
115: second network-based forwarding server
120: Content download server
125: Progressive Download Server
130: first network-based authentication server
135: Charging server
140: SMS interworking server
145: second network-based streaming server
150: first network-based streaming server
155: first network-based forwarding server
160: Real-time broadcast server

Claims (19)

A first network-based authentication server that decrypts encrypted user information transmitted from a portable terminal requesting a service through a first network sharing a public IP to perform user authentication;
A first network-based delivery server for receiving a service request for content or real-time broadcast data from the portable terminal through the first network, and providing service information for receiving the requested service to the portable terminal;
A first network-based streaming server for streaming the content or real-time broadcasting data through the first network using a TCP scheme according to a streaming request of the portable terminal provided with the service information;
Real-time broadcast data from the portable terminal through a second network that does not use the public IP, configures service information for receiving the requested service, and provides the service information to the portable terminal Delivery server; And
And a second network-based streaming server for streaming content or real-time broadcast data to a portable terminal accessed using the service information through the second network using a UDP method. The method according to claim 1,
Wherein the first network comprises a Wi-Fi network,
And the second network is a mobile communication network for providing a call and a wireless Internet service to the portable terminal. delete delete Claim 5 has been abandoned due to the setting registration fee. The method according to claim 1,
And a content download server for downloading the physical file of the requested content from the content repository to the portable terminal based on the terminal information of the portable terminal accessed using the service information through the first network or the second network The video service providing system comprising: The method according to claim 1,
Further comprising a progressive download server for downloading a physical file of the large capacity content from the content repository through the first network or the second network to a portable terminal supporting progressive download and downloading the file in a progressive manner system. Claim 7 has been abandoned due to the setting registration fee. The method according to claim 1,
Further comprising a content distribution server for storing information on serviceable contents or a physical file in a content information DB and a content repository. Claim 8 has been abandoned due to the setting registration fee. The method according to claim 1,
Further comprising a product page server configured to form a page for providing information on content registered as a serviceable product to the portable terminal through the first network or the second network. Claim 9 has been abandoned due to the setting registration fee. The method according to claim 1,
Further comprising a billing server for generating and storing a log for billing for a service provided to the mobile terminal. The method according to claim 1,
And a real-time broadcast server for acquiring video data and audio data of real-time broadcasting and providing the same to the first network-based streaming server and the second network-based streaming server. Claim 11 has been abandoned due to the set registration fee. The method according to claim 1,
Further comprising an SMS interworking server for transmitting a text message for at least one of a gift for contents, a reservation download service, and an exception process in cooperation with an SMS server performing a text messaging service, Video service delivery system. The network-based streaming server according to claim 1,
A network interface module communicating with the portable terminal through the first network to transmit and receive data;
A session management module for confirming the user authentication through the user information management server and acquiring session information;
A stream reading module for fetching service-requested contents from the content repository on a frame-by-frame basis based on the acquired session information;
A protocol management module for performing RTSP signaling, RTP over TCP packet transmission, and RTCP flow control on data transmitted and received through the network interface module to provide streaming and real-time streaming service through a TCP scheme; And
And a system interface module for transmitting and receiving data to and from the user information management server. The method of claim 10, wherein the real-
A capture module for capturing video data and audio data of real-time broadcasting;
An encoder module which encodes the captured video data and audio data in a format reproducible by a portable terminal;
A transmission module for packetizing the encoded video data and audio data in an RTP format, and transmitting the packetized data in a UDP protocol to the first network-based streaming server;
An RTSP server module for connecting an RTSP session with a portable terminal requesting real-time broadcasting through a first network-based streaming server and transmitting information about media that can be transmitted;
A structure information management module for managing information on a broadcast source and an output;
A schedule management module for managing schedule information of the real time broadcasting; And
And a DB management module for acquiring information on sources and outputs from the DB and schedule information. 14. The apparatus of claim 13, wherein the capture module
And further performs downsizing and resolution conversion according to specifications of the portable terminal so that the portable terminal can reproduce the captured video data. delete delete delete delete delete

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