KR20070070912A - Video on demand system and control method for using centralized control-based transport network - Google Patents

Abstract

A VOD system using a centralized control mode and a controlling method thereof are offer dynamic QoS without terminating a session of contents when change of a bandwidth for a VOD service is requested. If a VOD request message is received from a website, a centralized controller transmits a corresponding VRCP(VOD Resource Control Protocol) response message to the website after checking available resources and transmits a VRCP processing message to a VOD server(400) at the same time. If a VOD terminal(100) requests resources allocation/change, the website transmits the corresponding VRCP request message to the centralized controller. A type of the VRCP request message transmitted to the centralized controller from the website is one of a VOD request message requesting resource allocation, a VOD change message requesting change of the resource allocation, and a VOD cancellation message requesting cancellation of the resource allocation.

Description

Video On Demand system and control method for using centralized control-based transport network}

1A is a view illustrating a signal flow of an on-demand video service system using a centralized control method when providing an on-demand video service according to the present invention.

1B is a view illustrating a signal flow of an on-demand video service system using a centralized control method when it is impossible to provide an on-demand video service according to the present invention.

2A is a diagram illustrating a signal flow of an on-demand video service system using a centralized control method when a bandwidth of an on-demand video service according to the present invention can be changed.

2b is a view illustrating a signal flow of an on-demand video service system using a centralized control method when a bandwidth change of an on-demand video service according to the present invention is impossible.

3 is a view illustrating a signal flow of an on-demand video service system using a centralized control method when canceling an on-demand video service according to the present invention.

4 is a flowchart illustrating a method for providing an on-demand video service among the on-demand video service control method using the centralized control method according to the present invention.

5 is a flowchart illustrating a method for changing bandwidth of an on-demand video service in a video service control method using a centralized control method according to the present invention.

6 is a flowchart illustrating a method for canceling an on-demand video service among the on-demand video service control methods using the centralized control method according to the present invention.

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

100: On-demand video service terminal 200: Web site

300: centralized control unit 310: resource management unit

320: call management unit 400: video service server on demand

The present invention relates to an on-demand video service system using a centralized control method and a control method thereof.

In general, Video on Demand (hereinafter referred to as "VoD") is one of the interactive TVs (Internet TVs), which is a further development of unidirectional TVs. Say the service you provide. In other words, the program is selected according to the needs of the subscriber to receive the service.

In order to request the "BandWidth" change that the user is currently receiving from the existing on-demand video service, the user must terminate the session of the current service and connect again to request the corresponding service.

At this time, the request for the service may be denied, or even if the response to the service request may not be guaranteed the quality of the service.

The conventional video-on-demand service system is composed of an on-demand video service terminal, a web site and an on-demand video service server.

Here, the on-demand video service terminal accesses the web site, obtains the address of the on-demand video service server of the content that the user wants to receive, and then provides the on-demand video service server through the address of the on-demand video service server obtained through the web site. Connect to receive on-demand video service.

And, the web site has the address information of each on-demand video service server for the content, when the on-demand video service request for the content requested by the user from the on-demand video service terminal of the on-demand video service server that provides the content The address is provided to the video service terminal on demand. At this time, the web site provides an address of an on-demand video service server providing content and information of "BandWidth" of the content.

When the on-demand video service server requests a service for the corresponding content from the on-demand video service terminal, the on-demand video service server provides an on-demand video corresponding thereto.

However, when the on-demand video service system wants to change the "BandWidth" of the content currently being provided, the on-demand video service system terminates the service of the currently provided content and accesses the web site again to remove the "BandWidth". After selecting it, it connects to the video service server on demand and receives the service at the desired "BandWidth" speed.

Therefore, the conventional on-demand video service system has a problem that it is difficult to guarantee and quality guarantee for the availability of the service, and has to go through a cumbersome process from the user's point of view.

Accordingly, an object of the present invention is to solve the conventional problems as described above, and an object of the present invention is to provide a centralized control that can provide dynamic QoS without terminating a session of content when requesting a "BandWidth" change request of an on-demand video service. An on-demand video service system and a control method thereof are provided.

According to an aspect of an on-demand video service system using a centralized control method according to the present invention for achieving the above object, if a VRCP (VoD Resource Control Protocol) request message is received from the web site whether or not resources are allocated And a centralized control device for transmitting the VRCP response message to the web site and transmitting the VRCP processing message to the on-demand video service server.

When the on-demand video service terminal requests resource allocation / change, the web site transmits a corresponding VRCP request message to the centralized control device.

Here, the type of VRCP request message transmitted by the web site to the centralized control device may be a VoD request message requesting resource allocation, a VoD change message requesting resource allocation change, and a VoD cancel message requesting resource allocation cancellation. Which is either.

The VoD request message includes " BandWidth " information indicating the bandwidth of the on-demand video service requested by the on-demand video service terminal, source IP address information of the on-demand video service terminal requesting the on-demand video service, and the on-demand video service requested by the on-demand video service terminal. At least one destination IP address information of the on-demand video service server provided, and a class parameter indicating the type of the requested service.

The VoD change message includes at least one " BandWidth " information indicating a bandwidth of an on-demand video service requested by the on-demand video service terminal, and unique ID information of the on-demand video service terminal set by the centralized control device.

The VoD cancellation message may include unique ID information of an on-demand video service terminal set by a centralized control device.

Here, the ID information is transmitted from the centralized control device, the source IP address information of the on-demand video service terminal requesting the transmitted on-demand video service, VP information for providing the on-demand video service, and information on the on-demand video service. At least one or more.

When the VRCP request message is received from the web site, the centralized control apparatus checks whether there is an allocable resource and transmits a corresponding VRCP response message to the web site, and simultaneously sends a VRCP processing message to an on-demand video service server. The centralized control device includes a resource manager and a call manager.

The resource manager of the centralized control device stores resource information used by components of the network and determines whether resource allocation is possible with reference to the stored resource information.

If the VRCP request message for requesting / changing the on-demand video service is received from the web site, the call manager of the centralized control device determines whether the on-demand video service can be processed through the resource management unit. The VRCP response message is transmitted to the web site and the VRCP processing message is transmitted to the on-demand video service server.

The type of VRCP response message transmitted by the centralized control device to the web site includes a VoD response message, a VoD change response message, and a VoD cancellation response including ID information of an on-demand video service terminal requesting an on-demand video service. One of the messages.

Here, the ID information includes at least one source IP address information of the on-demand video service terminal requesting the on-demand video service, VP information of the on-demand video service currently provided, and information on the on-demand video service currently being provided.

The VoD response message, the VoD change response message, and the VoD release response message include only ID information when the VoD request message can be processed.

In this case, the VoD response message, the VoD change response message, and the VoD release response message include ID information, an error code, and detailed description information about the error code when the VoD request message cannot be processed.

The type of VRCP processing message transmitted by the centralized control device to the on-demand video service server is any one of a VoD request message and a VoD change request message transmitted by the web site when the VoD request message can be processed.

When the on-demand video service server receives the VRCP processing message from the centralized control device, the on-demand video service server analyzes the VRCP processing message and provides the on-demand video service to the on-demand video service terminal.

The on-demand video service server transmits a VoD termination request message to the centralized control device when the on-demand video service terminal providing the on-demand video service terminates the on-demand video service.

On the other hand, when the centralized control device receives a VoD cancellation request message from the on-demand video service server, the centralized control device recovers allocated resources and then transmits a VoD cancellation response message to the on-demand video service server.

According to an aspect of a method for controlling an on-demand video service system using a centralized control method according to the present invention, any on-demand video service terminal requests an on-demand video service to the web site; The web site transmitting a voice resource control protocol (VRCP) request message to the centralized control device; Determining, by the centralized control device, whether an allocable bandwidth resource exists; In the step of determining whether the allocable bandwidth resource exists, if the allocable bandwidth resource exists, transmitting a VRCP processing message to an on-demand video service server while simultaneously transmitting a VRCP response message to the web site; ; And checking, by the on-demand video service server, the VRCP processing message and providing the on-demand video service to the corresponding on-demand video service terminal.

On the other hand, in the step of determining whether the allocable bandwidth resource is present, if the allocable bandwidth resource is insufficient, the centralized control device further comprises the step of transmitting a VRCP response message to the web site.

Here, the VRCP request message in the step of the web site transmitting the VRCP request message to the centralized control device, the "BandWidth" information indicating the bandwidth of the on-demand video service requested by the on-demand video service terminal, requesting the on-demand video service VoD request message including at least one source IP address information of the on-demand video service terminal, destination IP address information of the on-demand video service server providing the on-demand video service requested by the on-demand video service terminal, and class parameters indicating the type of the requested service. to be.

In the step of determining whether the allocable bandwidth resource exists, if an allocable bandwidth resource exists, the centralized control device transmits a VRCP response message to the on-demand video service server while simultaneously transmitting a VRCP response message to the web site. The VRCP response message may include ID information including at least one source IP address of the on-demand video service terminal requesting the on-demand video service, VP information of the on-demand video service currently provided, and information on the on-demand video service currently being provided. It is a VoD response message including only, and the VRCP processing message is a VoD request message sent by the web site.

If the allocable bandwidth resource is insufficient in the step of determining whether the allocable bandwidth resource exists, the VRCP response message in the step of transmitting the VRCP response message to the web site is a VoD request message. If it cannot be processed, the error string includes ID information, an error code, and detailed description information of the error code.

According to another aspect of the on-demand video service control method using the centralized control method according to the present invention, the on-demand video service terminal in service requesting a bandwidth change of the on-demand video service to the web site; The web site transmitting a voice resource control protocol (VRCP) request message for changing a bandwidth of an on-demand video service to the centralized control device; Determining, by the centralized control device, whether a bandwidth of an on-demand video service can be changed; If it is possible to change the bandwidth of the on-demand video service in the step of determining whether the bandwidth of the on-demand video service is possible, the centralized control device transmits a VRCP response message to the web site and at the same time the VRCP processing message to the on-demand video service server. Transmitting; And checking, by the on-demand video service server, a VRCP processing message, and changing the bandwidth of the on-demand video service to the corresponding on-demand video service terminal.

Meanwhile, if the remaining bandwidth for changing the bandwidth of the on-demand video service is insufficient in determining whether the bandwidth of the on-demand video service is possible, the centralized control device may transmit a VRCP response message to the web site. It includes more.

Here, the VRCP request message at the step of the web site transmitting the VRCP request message for changing the bandwidth of the on-demand video service to the centralized control device, the bandwidth of the on-demand video service requested by the on-demand video service terminal " BandWidth "information and at least one unique ID information of an on-demand video service terminal set by the centralized control device.

If the bandwidth of the on-demand video service is changeable in the step of determining whether the bandwidth of the on-demand video service is possible, the centralized control device sends a VRCP response message to the web site and simultaneously sends it to the on-demand video service server. The VRCP response message in the step of transmitting the VRCP processing message includes at least source IP address information of the on-demand video service terminal requesting the on-demand video service, VP information of the on-demand video service currently provided, and information on the on-demand video service currently being provided. ID information including one or more, VRCP processing message is a VoD change message sent by the web site.

In addition, if the allocable bandwidth resource is insufficient in the step of determining whether the allocable bandwidth resource exists, the VRCP response message in the step of transmitting the VRCP response message to the web site by the centralized control device, the VoD request message If it cannot be processed, the error string includes ID information, an error code, and detailed description information of the error code.

According to another aspect of the on-demand video service control method using a centralized control method according to the invention, the on-demand video service terminal in service terminates the on-demand video service; Transmitting, by the on-demand video service server, a VoD cancellation request message to a centralized control device; Recovering, by the centralized control device, the bandwidth resources allocated to the on-demand video service terminal that terminated the on-demand video service; And transmitting, by the centralized control device, a VoD cancellation response message to the on-demand video service server.

Hereinafter, a preferred embodiment of an on-demand video service system and a control method using a centralized control method according to the present invention will be described in detail with reference to the accompanying drawings. At this time, it will be understood by those of ordinary skill in the art that the system configuration described below is a system cited for the purpose of the present invention and does not limit the present invention to the following system.

1A and 3 are diagrams illustrating a configuration of an on-demand video service system using a centralized control method according to the present invention. The on-demand video service system using a centralized control method according to the present invention is a video service terminal (ON). 100), a website 200, a centralized control device 300, and an on-demand image service server 400.

When the on-demand video service terminal 100 requests resource allocation / change, the web site 200 sends a corresponding VRCP (VoD Resource Control Protocol) request message to the centralized control device. Send to 300.

Here, the type of the VRCP request message transmitted from the web site 200 to the centralized control device 300 may be a Voice Only Demand (VoD) request message for requesting resource allocation, resource allocation. Any one of a VoD change message requesting a change and a VoD release message requesting resource allocation cancellation.

In addition, the VoD request message includes " BandWidth " information indicating a bandwidth of an on-demand video service requested by the on-demand video service terminal 100, source IP address information of the on-demand video service terminal 100 requesting on-demand video service, and an on-demand video service terminal. At least one destination IP address information of the on-demand video service server 400 providing the on-demand video service requested by the 100, and a class parameter indicating the type of the requested service.

The VoD change message includes “BandWidth” information indicating a bandwidth of an on-demand video service requested by the on-demand video service terminal 100, and unique ID information of the on-demand video service terminal 100 set by the centralized control device 300. It includes at least one.

In addition, the VoD cancellation message includes unique ID information of the on-demand video service terminal 100 set by the centralized control device 300.

Here, the ID information is transmitted from the centralized control device 300, the source IP address information of the on-demand video service terminal 100 requesting the transmitted on-demand video service, VP information for providing on-demand video service and on-demand At least one information about a video service is included.

When the VRCP request message is received from the web site 200, the centralized control device 300 checks whether there is an allocable resource and transmits a corresponding VRCP response message to the web site 200. The VRCP processing message is transmitted to the on-demand video service server 400, and the centralized control device 300 includes a resource manager 310 and a call manager 320.

The resource management unit 310 of the centralized control device 300 stores resource information used by components of the network, and determines whether resource allocation is possible with reference to the stored resource information.

The call manager 320 of the centralized control device 300 receives an on-demand video through the resource manager 310 when a VRCP request message for requesting / changing an on-demand video service is received from the web site 200. It determines whether the service can be processed, and if possible, transmits a VRCP response message to the web site 200 and a VRCP processing message to the on-demand video service server 400.

In addition, the type of VRCP response message transmitted from the centralized control device 300 to the web site 200 may include a VoD response message and a VoD including ID information of the on-demand video service terminal 100 that requested the on-demand video service. Any one of a change response message and a VoD cancel response message.

Here, the ID information includes at least one source IP address information of the on-demand video service terminal 100 requesting on-demand video service, VP information of the on-demand video service currently being provided, and information on on-demand video service currently being provided.

The VoD response message, the VoD change response message, and the VoD release response message include only ID information when the VoD request message can be processed.

In this case, the VoD response message, the VoD change response message, and the VoD release response message include ID information, an error code, and detailed description information about the error code when the VoD request message cannot be processed.

The type of VRCP processing message transmitted by the centralized control device 300 to the on-demand video service server 400 is a VoD request message transmitted by the web site 200 when processing of a VoD request message is possible. It is either a VoD change request message.

When the on-demand video service server 400 receives the VRCP processing message from the centralized control device 300, the on-demand video service server analyzes the VRCP processing message and provides the on-demand video service to the on-demand video service terminal 100.

The on-demand video service server 400 transmits a VoD cancellation request message to the centralized control device 300 when the on-demand video service terminal 100 providing the on-demand video service ends the on-demand video service. .

Meanwhile, when the centralized control device 300 receives the VoD cancellation request message from the on-demand video service server 400, the centralized control device 300 transmits a VoD cancellation response message to the on-demand video service server 400 after recovering allocated resources. do.

General functions and detailed operations of the above-described elements will be omitted, and the operations will be described based on operations corresponding to the present invention.

First, an operation of receiving an on-demand video service will be described with reference to FIG. 1A.

The on-demand video service terminal 100 needs to access the web site 200 in order to receive the on-demand video service. That is, the on-demand video service terminal 100 selects the on-demand video service content (movie) requested by the web server and BandWidth (10 Mbps) of the video.

As the on-demand video service terminal 100 requests resource allocation, the web site 200 provides BandWidth (10 Mbps) information, IP address information of the on-demand video service terminal 100, and the on-demand video service terminal 100 requested. The centralized control device 300 receives a VoD request message (VRCP request message) including destination IP address information of the on-demand video service server 400 that provides a video service, and a class parameter (movie) indicating a type of the requested service. To send).

Then, the resource information used by the elements of the network is stored, and the resource management unit 310 of the centralized control device 300 of the centralized control device 300 that determines whether the resource allocation is possible by referring to the stored resource information Check whether or not.

Subsequently, when the resource allocation is possible, the call management unit 320 of the centralized control device 300 transmits a VoD response message (VRCP response message) including ID information to the web site 200 as shown in FIG. 1A. At the same time to transmit the on-demand video service server (400) BandWidth (10Mbps) information, the on-demand video service terminal 100 IP address information, the on-demand video service provided by the on-demand video service terminal 100 requested The server 400 transmits a VoD request message (VRCP processing message) including destination IP address information of the server 400 and a class parameter (movie) indicating the type of the requested service.

Then, the on-demand video service server 400 analyzes the received VoD request message (VRCP processing message) and provides the on-demand video service to the on-demand video service terminal 100. At this time, the BandWidth provided by the on-demand video service server 400 to the on-demand video service terminal 100 is 10 Mbps.

If the resources that can be allocated through the resource management unit 310 of the centralized control device 300 are insufficient, the call management unit 320 of the centralized control device 300 as shown in FIG. The web site 200 transmits to the web site 200 a VoD response message (VRCP response message) including an error string including ID information, an error code, and detailed description information of the error code.

Then, the web site 200 receives the VoD response message (VRCP response message) from the centralized control device 300 in response to the VoD response message (VRCP response message) indicating that resource allocation is impossible. By transmitting to the video service terminal 100 informs the video service on demand.

Subsequently, a method for changing BandWidth in order to receive a high resolution video on demand service will be described with reference to FIGS. 2A and 2B.

First, the on-demand video service terminal 100 needs to access the web site 200 again in order to change the BandWidth of the on-demand video service. That is, the on-demand video service terminal 100 changes the BandWidth (20 Mbps) of the on-demand video service contents that it wants to change after accessing the web server.

Then, as the on-demand video service terminal 100 requests resource allocation, the web site 200 allocates BandWidth (20 Mbps) information, and the centralized control device 300 allocates the on-demand video service terminal 100. The VoD change message (VRCP request message) including the ID information is transmitted to the centralized control device 300.

Then, the resource information used by the elements of the network is stored, and the resource management unit 310 of the centralized control device 300 of the centralized control device 300 that determines whether the resource allocation is possible by referring to the stored resource information Check whether or not.

Subsequently, when the resource allocation is possible, the call manager 320 of the centralized control device 300 transmits a VoD change response message (VRCP response message) including ID information to the web site 200 as illustrated in FIG. 2A. ) And a VoD change message including BandWidth (20Mbps) information to the on-demand video service server 400 and ID information assigned by the centralized control device 300 to the on-demand video service terminal 100. Send (VRCP Processing Message).

Then, the on-demand video service server 400 analyzes the received VoD change message (VRCP processing message) and provides the on-demand video service to the on-demand video service terminal 100. At this time, the on-demand video service server 400 changes and provides BandWidth provided to the on-demand video service terminal 100 from 10 Mbps to 20 Mbps.

If the resources that can be allocated through the resource management unit 310 of the centralized control device 300 are insufficient, the call management unit 320 of the centralized control device 300 as shown in FIG. The web site 200 transmits a VoD change response message (VRCP response message) including an error string including ID information, an error code, and detailed description information of the error code to the web site 200.

Then, the web site 200 receives the VoD change response message (VRCP response message) in response to the VoD change response message (VRCP response message) indicating that resource allocation is impossible from the centralized control device 300. The on-demand image service terminal 100 is transmitted to notify the change of the on-demand image service.

Thereafter, when the on-demand video service terminal 100 providing the on-demand video service terminates the on-demand video service, the on-demand video service server 400 includes a VoD cancellation request message including ID information as shown in FIG. 3. It transmits to the centralized control device 300.

Then, the centralized control device 300 terminates the provision of the on-demand video service by transmitting the VoD cancellation response message including ID information to the on-demand video service server 400 after recovering the allocated resources.

Next, the on-demand video service request among the on-demand video service control method using the centralized control method according to the present invention having the above configuration will be described with reference to FIG. 4.

First, any on-demand video service terminal 100 requests the on-demand video service to the web site 200 (S1).

Subsequently, the web site 200 transmits a VRCP request message to the centralized control device 300 (S2). In this case, the VRCP request message may include “BandWidth” information indicating the bandwidth of the on-demand video service requested by the on-demand video service terminal 100, source IP address information of the on-demand video service terminal 100 requesting on-demand video service, and on-demand video. The VoD request message includes at least one destination IP address information of the on-demand video service server 400 providing the on-demand video service requested by the service terminal 100, and class parameters indicating the type of the requested service.

Then, the centralized control device 300 determines whether there is an allocated bandwidth resource (S3).

At this time, in the step S3 of determining whether the allocable bandwidth resource exists (YES), the centralized control device 300 transmits a VRCP response message to the website 200. At the same time and transmits the VRCP processing message to the video service server on demand (S4). At this time, the VRCP response message transmitted from the centralized control device 300 to the web site 200 includes source IP address information of the on-demand video service terminal 100 requesting the on-demand video service, and the on-demand video service currently being provided. This is a VoD response message including only ID information including at least one of VP information and information on an on-demand video service being provided, and the centralized control device 300 transmits to the on-demand video service server 400. The VRCP processing message is a VoD request message transmitted by the web site 200.

Then, the on-demand video service server 400 checks the VRCP processing message and then provides the on-demand video service to the corresponding on-demand video service terminal (S5).

Meanwhile, if the allocable bandwidth resource is insufficient (NO) in the step S3 of determining whether the allocable bandwidth resource exists (NO), the centralized control device 300 transmits a VRCP response message to the website 200. (S6). In this case, the VRCP response message transmitted from the centralized control device 300 to the web site 200 may include ID information, an error code, and detailed description information about the error code when the VoD request message cannot be processed. Contains an error string to include.

Then, the on-demand video service bandwidth change request of the on-demand video service control method using the centralized control method according to the present invention having the above configuration will be described with reference to FIG. 5.

First, the on-demand video service terminal 100 in service requests the web site 200 to change the bandwidth of the on-demand video service (S100).

Subsequently, the web site 200 transmits a VRCP request message for changing the bandwidth of the on-demand video service to the centralized control device 300 (S110). At this time, the VRCP request message transmitted by the web site 200 to the centralized control device 300 is the centralized type of the VRCP request message for the web site 200 to change the bandwidth of the on-demand video service. The VRCP request message in the step of transmitting to the control device 300 is " BandWidth " information indicating the bandwidth of the on-demand video service requested by the on-demand video service terminal 100, and the on-demand video service set by the centralized control device 300. The VoD change message includes at least one unique ID information of the terminal 100.

Then, the centralized control device 300 determines whether the bandwidth of the on-demand video service can be changed (S120).

At this time, if it is possible to change the bandwidth of the on-demand video service in the step (S120) of determining whether the bandwidth of the on-demand video service is possible (YES), the centralized control device 300 sends a VRCP response message to the website ( At the same time, and transmits the VRCP processing message to the on-demand video service server 400 (S130). At this time, the VRCP response message transmitted from the centralized control device 300 to the web site 200 includes source IP address information of the on-demand video service terminal 100 requesting on-demand video service, and an on-demand video service currently being provided. ID information including at least one of VP information and information on the on-demand video service currently being provided, and the VRCP processing message transmitted by the centralized control device 300 to the on-demand video service server 400 is the web. This is a VoD change message sent by the site 200.

Then, after the on-demand video service server 400 checks the VRCP processing message, the on-demand video service terminal changes the bandwidth of the on-demand video service and provides it (S140).

On the other hand, if the remaining bandwidth for changing the bandwidth of the video on demand service is insufficient (NO) in the step (S300) of determining whether the bandwidth of the video service on demand (NO), the centralized control device 300 the VRCP response message To transmit to the web site 200 (S150). The VRCP response message transmitted from the centralized control device 300 to the website 200 includes an error including ID information, an error code, and detailed description information about an error code when the VoD request message cannot be processed. Contains a string.

Next, the cancellation of the on-demand video service in the on-demand video service control method using the centralized control method according to the present invention having the above configuration will be described with reference to FIG. 6.

First, the on-demand video service terminal 100 in service terminates the on-demand video service (S200).

Then, the on-demand video service server 400 transmits the VoD cancellation request message to the centralized control device 300 (S210).

Subsequently, the centralized control device 300 recovers the bandwidth resources allocated to the on-demand video service terminal 100 that terminates the on-demand video service (S220).

Subsequently, the centralized control device 300 transmits a VoD cancellation response message to the on-demand video service server 400 (S230).

Although the present invention has been described in detail only with respect to VoD in the specific embodiments described, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical scope of the present invention (data streaming service, data providing service using limited bandwidth), It is natural that such variations and modifications fall within the scope of the appended claims.

As described above, according to the on-demand video service system and the control method using the centralized control method according to the present invention, there is an excellent effect of guaranteeing dynamic QoS to clients receiving the on-demand video service.

Claims (33)

In the on-demand video service system comprising a website and an on-demand video service server, Upon receiving a VRCP request message from the web site, the server checks whether there is an allocable resource and transmits a corresponding VRCP response message to the web site and transmits a VRCP processing message to an on-demand video service server. On-demand video service system using a centralized control method including a centralized control device. The method of claim 1, The website is When the on-demand video service terminal requests resource allocation / change, etc., the on-demand video service system using a centralized control method characterized by transmitting a corresponding VRCP request message to the centralized control device. The method of claim 2, The type of VRCP request message that the web site sends to the centralized control device, Video on Demand (VOD) request message for requesting resource allocation, a VoD change message for requesting resource allocation change, and a VoD release message for requesting resource allocation cancellation. Video service system. The method of claim 3, wherein The VoD request message, "BandWidth" information indicating the bandwidth of the on-demand video service requested by the on-demand video service terminal, source IP address information of the on-demand video service terminal requesting the on-demand video service, and the on-demand video service server providing the on-demand video service requested by the on-demand video service terminal. On-demand video service system using a centralized control method including at least one destination IP address information, and class parameters indicating the type of the requested service. The method of claim 3, wherein The VoD change message, On-demand video using a centralized control method including at least one " BandWidth " information indicating the bandwidth of the on-demand video service requested by the on-demand video service terminal and at least one unique ID information of the on-demand video service terminal set by the centralized control device. Service system. The method of claim 3, wherein The VoD cancellation message, An on-demand video service system using a centralized control method including unique ID information of an on-demand video service terminal set by a centralized control device. The method according to claim 5 or 6, The ID information is, From the centralized control device, the source IP (Internet Protocol) address information of the on-demand video service terminal requesting the transmitted on-demand video service, VP (virtual path) information for providing on-demand video service, and on-demand video service On-demand video service system using a centralized control method including at least one information. The method of claim 1, The centralized control device, A resource manager which stores resource information used by components of the network and determines whether resource allocation is possible with reference to the stored resource information; And When the VRCP request message for requesting / changing the on-demand video service is received from the web site, it is determined whether the on-demand video service can be processed through the resource manager, and if possible, the VRCP response message is transmitted to the web site. On-demand video service system using a centralized control method including a call management unit for transmitting a VRCP processing message to an on-demand video service server. The method of claim 8, The type of VRCP response message that the centralized control device sends to the web site is And a VoD response message, a VoD change response message, and a VoD cancel response message including ID information of an on-demand video service terminal requesting an on-demand video service. The method of claim 9, The ID information is, On-demand video service using a centralized control method including at least one source IP address information of the on-demand video service terminal requesting the on-demand video service, VP information of the on-demand video service currently provided and information on the on-demand video service currently provided system. The method of claim 9, The VoD response message, VoD change response message, and VoD cancel response message, On-demand video service system using centralized control including only ID information when processing VoD request messages is possible. The method of claim 9, The VoD response message, VoD change response message, and VoD cancel response message, When the processing of the VoD request message is impossible, on-demand video service system using at least one centralized control method including at least one error string including ID information, error code, and detailed description information of the error code. The method of claim 8, The type of VRCP processing message transmitted by the centralized control device to the on-demand video service server is When the processing of the VoD request message is possible on-demand video service system using a centralized control method, characterized in that any one of the VoD request message, the VoD change request message transmitted by the web site. The method of claim 1, The on-demand video service server, When the VRCP processing message is received from the centralized control device, the on-demand video service system using the centralized control method, characterized in that the on-demand video service is provided to the on-demand video service terminal by analyzing the VRCP processing message. The method of claim 14, The on-demand video service server, On-demand video service system using a centralized control method characterized in that when the on-demand video service terminal providing the on-demand video service terminates the on-demand video service, the VoD cancellation request message to the centralized control device. The method of claim 15, The centralized control device, When the VoD cancellation request message is received from the on-demand video service server, after the allocated resources are recovered, the on-demand video service system using a centralized control method, characterized in that for transmitting the VoD cancellation response message to the on-demand video service server. The method of claim 1, The service provided by the on-demand video service system, On-demand video service system using a centralized control method, characterized in that applicable to data streaming services. In the on-demand video service control method to the on-demand video service system of the centralized control method including a website and an on-demand video service server, Requesting an on-demand video service from the web site by an on-demand video service terminal; The web site transmitting a voice resource control protocol (VRCP) request message to the centralized control device; Determining, by the centralized control device, whether an allocable bandwidth resource exists; In the step of determining whether the allocable bandwidth resource exists, if the allocable bandwidth resource exists, transmitting a VRCP processing message to an on-demand video service server while simultaneously transmitting a VRCP response message to the web site; ; And After the on-demand video service server checks the VRCP processing message, the on-demand video service control method using a centralized control method comprising the step of providing the on-demand video service to the on-demand video service terminal. The method of claim 18, In the step of determining whether the allocable bandwidth resource is present, if the allocation of the bandwidth resource is insufficient, the centralized control device further comprises the step of transmitting a VRCP response message to the website on-demand using a centralized control method Video service control method. The method of claim 18, The VRCP request message at the step of the web site transmitting the VRCP request message to the centralized control device, "BandWidth" information indicating the bandwidth of the on-demand video service requested by the on-demand video service terminal, source IP address information of the on-demand video service terminal requesting the on-demand video service, and the on-demand video service server providing the on-demand video service requested by the on-demand video service terminal. And a VoD request message including at least one destination IP address information and a class parameter indicating a type of a requested service. The method of claim 18, In the step of determining whether the allocable bandwidth resource exists, if the allocable bandwidth resource exists, transmitting a VRCP processing message to an on-demand video service server while simultaneously transmitting a VRCP response message to the web site; In the VRCP response message, VoD including only ID information including at least one source IP address of the on-demand video service terminal requesting the on-demand video service, virtual path (VP) information of the on-demand video service currently provided, and information on the on-demand video service currently being provided (Video on Demand) On-demand video service control method using a centralized control method characterized in that the response message. The method of claim 18, In the step of determining whether the allocable bandwidth resource exists, if the allocable bandwidth resource exists, transmitting a VRCP processing message to an on-demand video service server while simultaneously transmitting a VRCP response message to the web site; In the VRCP processing message, On-demand video service control method using a centralized control method characterized in that the Web site is a VoD request message sent. The method of claim 19, In the step of determining whether the allocable bandwidth resource is present, if the allocable bandwidth resource is insufficient, the VRCP response message in the step of transmitting the VRCP response message to the web site, the centralized control device, If it is impossible to process the VoD request message, on-demand video service control method using a centralized control method characterized in that it comprises at least one error string including ID information, error code, and detailed description information about the error code. . The method of claim 18, The service provided by the on-demand video service system, On-demand video service control method using a centralized control method, characterized in that applicable to the data streaming service. In the on-demand video service bandwidth changing method of the on-demand video service system of the centralized control method including a website and an on-demand video service server, Requesting, by the on-demand video service terminal in service, a bandwidth change of the on-demand video service to a web site; The web site transmitting a voice resource control protocol (VRCP) request message for changing a bandwidth of an on-demand video service to the centralized control device; Determining, by the centralized control device, whether a bandwidth of an on-demand video service can be changed; If it is possible to change the bandwidth of the on-demand video service in the step of determining whether the bandwidth of the on-demand video service is possible, the centralized control device transmits a VRCP response message to the web site and at the same time the VRCP processing message to the on-demand video service server. Transmitting; And After the on-demand video service server checks the VRCP processing message, the on-demand video service control method using a centralized control method comprising the step of changing the bandwidth of the on-demand video service to the on-demand video service terminal. The method of claim 25, If the remaining bandwidth for changing the bandwidth of the on-demand video service is insufficient in determining whether it is possible to change the bandwidth of the on-demand video service, the centralized control apparatus further comprises transmitting a VRCP response message to the website. On-demand video service control method using a centralized control method. The method of claim 25, The VRCP request message at the step of the web site transmitting the VRCP request message for changing the bandwidth of the video service on demand to the centralized control device, A centralized VoD change message including at least one " BandWidth " information indicating a bandwidth of an on-demand video service requested by the on-demand video service terminal, and at least one unique ID information of the on-demand video service terminal set by the centralized control device; On-demand video service control method using the centralized control method. The method of claim 25, If it is possible to change the bandwidth of the on-demand video service in the step of determining whether the bandwidth of the on-demand video service is possible, the centralized control device transmits a VRCP response message to the web site and at the same time the VRCP processing message to the on-demand video service server. VRCP response message in the step of transmitting the, The centralized type is characterized in that the ID information including at least one source IP address information of the on-demand video service terminal requesting the on-demand video service, VP information of the on-demand video service currently provided and information on the on-demand video service currently provided Custom video service control method using control method. The method of claim 25, If it is possible to change the bandwidth of the on-demand video service in the step of determining whether the bandwidth of the on-demand video service is possible, the centralized control device transmits a VRCP response message to the web site and at the same time the VRCP processing message to the on-demand video service server. VRCP processing message in the step of transmitting the, On-demand video service control method using a centralized control method, characterized in that the web site sent VoD change message. The method of claim 26, In the step of determining whether the allocable bandwidth resource is present, if the allocable bandwidth resource is insufficient, the VRCP response message in the step of transmitting the VRCP response message to the web site, the centralized control device, If it is impossible to process the VoD request message, on-demand video service control method using a centralized control method characterized in that it comprises at least one error string including ID information, error code, and detailed description information about the error code. . The method of claim 25, The service provided by the on-demand video service system, On-demand video service control method using a centralized control method, characterized in that applicable to the data streaming service. In the on-demand video service cancellation method to the on-demand video service system of the centralized control method including a website and an on-demand video service server, Terminating the on-demand video service by the on-demand video service terminal in service; Transmitting, by the on-demand video service server, a VoD cancellation request message to a centralized control device; Recovering, by the centralized control device, the bandwidth resources allocated to the on-demand video service terminal that terminated the on-demand video service; And And transmitting, by the centralized control device, a VoD termination response message to the on-demand video service server. The method of claim 32, The service provided by the on-demand video service system, On-demand video service control method using a centralized control method, characterized in that applicable to the data streaming service.

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