KR20110076831A - Distributed Network PRP System and Its Service Method - Google Patents

Abstract

The present invention relates to a distributed network PVR system and a service method thereof, and more particularly, to store broadcast stream content transmitted in real time in real time at each node, and to provide it as a VOD type service at a user's desired time. A distributed network PVR system and a service method thereof, comprising: a terminal; An nPVR server for processing the recording information received from the terminal; A broadcast transmission server for transmitting a broadcast stream; And a plurality of streaming node servers configured to store the broadcast stream data received from the broadcast transmission server as a file and deliver the same to the terminal. Minimize the load has the effect of providing a content service to the user.

Description

Distributed network PCR system and its service method {DISPERSIVE NETWORK PERSONAL VIDEO RECORDER SYSTEM AND SERVICE METHOD THEREOF}

The present invention relates to a distributed network PVR (Personal Video Recorder) system and service method related to IPTV broadcasting technology, and more particularly, to store broadcasting stream contents transmitted in real time at each node in real time, and to a user desired time. The present invention relates to a distributed network PVR system and a service method thereof that can provide a service in a VOD form.

Recently, as the video compression technology is advanced and the communication speed by the IP network is increased, an IPTV service combining the advantages of the TV and the Internet has been provided. Unlike general TV, IPTV uses a high-speed communication network to download and play content from a content server, and the content download is performed through a set top box (STB) installed in a user's home.

In particular, the video signal transmitted to the TV is stored in the hard disk drive in the STB using video compression technology and played back.

However, hard disk drives used as storage media in STBs not only increase STB manufacturing costs, but are also a major cause of STB failure. Therefore, there is a need for another way to provide services within the STB without using hard disks.

One such method is to store content in storage on the network, which is storage outside the STB. That is, the transmitter may store the stream for the user request and transmit it to the user. The method of storing the stream at the transmitting end may be a method of capturing and storing the stream transmitted from the encoding equipment.

However, this method is a method of storing and using the central center, the server of the central center has to deal with all the traffic of the user service.

Therefore, in order to provide a smooth service to a large number of users, it is necessary to take a method of transmitting the stored content so that it can be serviced by a distributed server. This method does not support real-time service because it provides a service after storing and copying. Has a problem.

Therefore, in view of the above-described problem, the present invention can cope with an increasing environment because the broadcast contents are stored not only at the central center but at distributed local nodes on the network, and the streams are transmitted at each node in charge of transmission. The present invention provides a distributed network PVR system and a service method thereof to enable real-time service by storing and using the service in a service.

The present invention is a terminal; An nPVR server for processing the recording information received from the terminal; A broadcast transmission server for transmitting a broadcast stream; The present invention relates to a distributed network PVR system including a plurality of streaming node servers storing and transmitting broadcast stream data received from the broadcast transmission server to the terminal.

The present invention may further include a node management server that transmits a list of streaming node servers to be accessed by the terminal when the terminal requests a streaming node server to be accessed for viewing the broadcast. The terminal may further include a terminal management server having a reservation scheduler for confirming and transferring information of the authenticated terminal to an nPVR server and adding / modifying the reservation information for each terminal, wherein the terminal, the nPVR server and the streaming node server The apparatus may further include an EPG server for transmitting broadcast schedule information to each server according to the broadcast schedule information request.

In this case, the terminal may receive a broadcast by accessing a streaming node server located at the shortest distance among the received streaming node server lists, and the shortest distance is determined by an IP block, an AS number, a response speed, a list order, and the like. If the storage capacity of the stream is insufficient, the storage capacity can be increased at the request of the user.

The nPVR server may store PVR information including broadcast channel information, broadcast time information, recording time information, and terminal information of broadcast content based on the recording information received from the terminal, and may be configured to control a streaming node server. .

The broadcast stream transmission of the streaming node server may be performed through a wired or wireless internet, and the streaming node server may transmit a broadcast stream to a terminal in real time.

The streaming node server may be hierarchically configured to control the hierarchical streaming node server by the node management server to reduce the load of the streaming node server, and the streaming node server may include a streaming node server for backup. In addition, the streaming node server can have differentiated content for each streaming node server and can be managed unattended.

The streaming node server may convert the broadcast stream transmitted from the broadcast transmission server into a video compression format of any one of MPEG1, MPEG2, MPEG4, H.261, H.263, H.264, MP4, FLV, and WMV, and MPEG-1. / 2 Compressed and stored in any one of Layer I / II / III, AC3 and ACC audio compression format.

In addition, the streaming node server may receive a UDP multicast stream, RTSP or HTTP unicast stream, the data transmission between the streaming node server and the terminal is Overlay Multicast, Peer to Peer, Grid It may include a network transmission method, FTP Download, RTSP streaming and HTTP streaming, the data transmission between the hierarchical streaming node server may be performed by the Overlay Multicast method, Peer to Peer method, grid network method.

In addition, the present invention includes the steps of the streaming node server receiving the broadcast schedule information from the EPG server and analyzing it; Receiving and storing the broadcast stream from the broadcast transmission server by the streaming node server; Monitoring and managing the status of each streaming node server by a node management server; Requesting, by the terminal, the nPVR server to record a specific broadcast content; Checking and authenticating, by the nPVR server, the storage capacity of each terminal to the recording request; Calculating, by the nPVR server, the remaining storage capacity of the terminal and storing information about the requested content; When the terminal requests the stored content, the node management server searches for the streaming node server located at the shortest distance and transmits the broadcast content from the streaming node server at the shortest distance to the terminal. It is about a method.

The present invention also provides a method for providing broadcast viewing in a distributed network PVR service, the method comprising: requesting, by a terminal, a broadcast list reserved for an EPG server; Receiving, by the EPG server, the recorded broadcast information of the terminal from a terminal management server, and delivering the contents information of the recorded broadcast to the terminal; Selecting the broadcast content by the terminal and making an optimal access server information request to a node management server; And receiving, by the terminal, a list of optimal streaming node servers from the node management server and receiving data therefrom.

In addition, the present invention provides a method for providing current broadcast recording in a distributed network PVR service, the method comprising: requesting a terminal to store specific broadcast data to an nPVR server; The nPVR server receiving storage capacity information of the terminal from a terminal management server; and transmitting broadcast reservation information to the terminal management server if the storage capacity information is suitable for storing the broadcast data. The present invention relates to a service method, wherein the terminal storage capacity information is not suitable for storage of the broadcast data, transmitting non-storable information to the terminal, and the terminal requests to delete existing stored data, interrupts a storage operation, or The method may further include requesting any one of allocation of additional storage space.

In addition, the present invention provides a method for providing a broadcast recording stop in a distributed network PVR service, the terminal comprising: requesting a broadcast recording stop from an nPVR server; Determining, by the nPVR server, whether there is recording information and receiving reservation information from a terminal management server by the nPVR server when there is no recording information; If the recording stop broadcasting is currently being broadcast, the terminal selects a request to delete or stop recording, and in the case of deletion, the nPVR server deletes the broadcast reservation information of the terminal and transmits it to the terminal management server. In the case of the nPVR server changes the broadcast reservation information of the terminal and delivers it to the terminal management server, and if the recording stop broadcast is not currently broadcasting, the nPVR server deletes the broadcast reservation information of the terminal and It relates to a distributed network PVR service method comprising the step of transmitting to the terminal management server.

In addition, the present invention provides a method for storing a broadcast in a distributed network PVR service, the method comprising: periodically checking whether a streaming schedule ID is changed from an EPG server by a streaming node server; The streaming node server receiving a broadcast schedule from the EPG server and receiving a broadcast stream from a broadcast transmitting server when the broadcast schedule ID is changed; and a scheduler in the streaming node server analyzes the broadcast schedule information to receive the received broadcast. It may provide a distributed network PVR service method comprising the step of storing the stream in a schedule unit, the streaming node server receives the broadcast stream from the broadcast transmission server, and then transmits the received broadcast stream to the terminal in real time It may further comprise the step.

As described above, in the present invention, when there are a large number of users of the service, the real-time stream content is stored and serviced directly at each node without a separate storage and content distribution system, thereby minimizing network load in an optimal time, thereby ensuring stable users. There is an effect that can provide a content service.

In addition, the present invention enables the storage and management of the real-time broadcast content at each node, the user has the additional effect that the user can quickly receive the content service in real time from the nearest node.

1 is a block diagram showing a distributed network PVR system according to an embodiment of the present invention.
2 is a block diagram showing an nPVR server applied to a distributed network PVR system according to an embodiment of the present invention.
3 is a diagram illustrating a streaming node server applied to a distributed network PVR system according to an embodiment of the present invention.
4 is a flowchart illustrating a recording broadcast viewing process by a terminal applied to a distributed network PVR system according to an embodiment of the present invention.
5 is a flowchart illustrating a recording and a reserved recording method by a terminal applied to a distributed network PVR system according to an embodiment of the present invention.
6 is a flowchart illustrating a recording stop method of a terminal applied to a distributed network PVR system according to an embodiment of the present invention.
7 is a flowchart illustrating the storage of a live broadcast stream and a transmission to a terminal of a streaming node server applied to a distributed network PVR system according to an embodiment of the present invention.

The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description.

Specific structural or functional descriptions are merely illustrated for the purpose of describing embodiments in accordance with the concepts of the present invention, and embodiments in accordance with the concepts of the present invention may be embodied in various forms and described in the specification or the application. It should not be construed as limited to these.

Embodiments in accordance with the concepts of the present invention can be variously modified and have a variety of forms specific embodiments will be illustrated in the drawings and described in detail in the specification or the application. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a specific disclosed form, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and / or second may be used to describe various components, but the components are not limited to the terms. The terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of the rights according to the inventive concept, the first component may be called a second component, and For example, the second component may also be referred to as a first component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected or connected to that other component, but it may be understood that other components may be present in the middle. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle. Other expressions to describe the relationship between the components, such as 'between' and 'just between' or 'neighbor' and 'direct neighbor', should likewise be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. The terms 'comprise' or 'having' in this specification are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers, It is to be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be interpreted as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a block diagram showing a distributed network PVR system according to an embodiment of the present invention.

Referring to FIG. 1, a distributed network PVR system according to an embodiment of the present invention includes servers in a central center and local distributed servers for distributed storage of a real time broadcast stream in real time.

The servers in the central center receive and analyze the broadcast recording request information of the terminal and store and manage the recording information in an appropriate capacity space for each terminal, so that the terminal can receive the service within the designated capacity. The streaming node server of the IDC (relay center) stores the broadcast stream data received from the broadcast transmission server as a file to serve as an access server of the terminal or to relay to another streaming node server. The streaming node server in the local group stores the broadcast stream data received from the broadcast transmission server as a file and serves as an access server of the terminal.

1, a distributed network PVR system according to an embodiment of the present invention, the terminal 100 for requesting recording information and receiving a broadcast, and the nPVR server 200 for processing the recording information received from the terminal 100. ), A broadcast transmission server 300 for transmitting a broadcast stream, a plurality of streaming node server 400 and a terminal 100 for storing the broadcast stream data received from the broadcast transmission server 300 as a file and transmitting it to the terminal. When requesting the streaming node server 400 to be accessed for viewing, it can be seen that the terminal 100 includes a node management server 500 that delivers the list of streaming node servers 400 to be connected to the terminal 100.

In addition, the distributed network PVR system of the present invention has a reservation scheduler for confirming whether the terminal 100 is authenticated, transferring information of the authenticated terminal 100 to the nPVR server 200, and adding / changing reservation information for each terminal. Terminal management server 600 may be configured to further include.

The terminal 100, the nPVR server 200, and the streaming node server 400 may further include an EPG server 700 that delivers broadcast schedule information to each request server in response to a broadcast schedule information request.

The terminal 100 receives a user's request and transmits it to a server in the system and receives broadcast information from each server. A terminal, a STB (SET-TOP BOX), a mobile terminal, etc. may be used. Has minimal server information (EPG server 700, nPVR server 200 information, etc.) for accessing.

The terminal 100 may request the nPVR server 200 to record information such as recording or reservation recording or stopping of the broadcast content, a list of the recorded broadcast content, deleting the existing stored data, and allocating additional storage space. The EPG server 700 may periodically receive and update broadcast programming schedule information, and request a reservation-recorded broadcast list. When the user selects the broadcast content that the user wants to watch, the terminal 100 requests the node management server 500 for the list of streaming node servers 400 to be accessed for viewing the broadcast, and receives the streaming node server 400 at the shortest distance. ) To receive broadcast data. Determination of the shortest distance can be made by various criteria such as IP block, AS number, response speed, list order, and so on.

2 is a configuration diagram illustrating an nPVR server applied to a distributed network PVR system according to an embodiment of the present invention.

nPVR (Network Personal Video Recorder) server 200 is recorded from the terminal 100, such as recording or reservation recording or stopping of broadcast content, list of recorded broadcast content, deletion of existing storage data, additional storage space allocation, etc. Request information and process it. In addition, it is possible to control the streaming node server.

The nPVR server 200 stores PVR information including broadcast channel information, broadcast time information, recording time information, and terminal information of broadcast content based on the recording information received from the terminal 100, and records a broadcast recording request or broadcast reservation. When the request is received, the terminal 100 records by using the received information (terminal ID, broadcast content ID, recording request time, etc.) and the corresponding broadcast program information (broadcast content ID, broadcast start time, end time, etc.). Determine the capacity of the desired broadcast (terminal ID, recording time, recording capacity, etc.), and receives the remaining storage capacity information, storage time information, etc. of the terminal 100 from the terminal management server 600, and then recording using this Figure out if you can save the desired broadcast.

If the storage capacity or storage time is sufficient, if there is a broadcast recording request, information about the broadcast content (broadcast recording start time, broadcast end time, etc.) is registered in the terminal management server 600, and a broadcast reservation recording request is made. If there is, the information (broadcast start time, broadcast end time, reservation tag) for the corresponding broadcast content is registered in the terminal management server 600. When the terminal 100 makes a stop request during recording, the broadcast end time of the corresponding broadcast content is replaced with a recording stop time, and when the terminal 100 makes a reservation recording stop request, the corresponding broadcast reservation content is deleted.

On the other hand, if there is not enough free storage space to store broadcast data, the terminal transmits information that cannot be stored to the terminal 100, and the terminal 100 requests for deletion of existing storage data for the impossible information to secure a storage space or a storage operation. You can stop. Alternatively, the user may request an additional storage space allocation from the nPVR server 200. In this case, the additional space allocation performs a separate billing process (for example, using a mobile phone, credit card or online payment system), and then transfers it to the terminal management server 600 to allocate additional storage space and receive the result. It may be by the process of transmitting to the terminal 100.

When the terminal 100 requests a list of the recorded broadcast content, the nPVR server 200 delivers the broadcast content list information such as content ID, broadcast time, reservation time, playback time, and reservation status to the terminal 100. And, the user can use this to view or delete the recorded broadcast, and when the user requests to delete the recorded broadcast or the recorded broadcast, the nPVR server 200 is the terminal management server 600 It transmits the corresponding content information (terminal ID, content ID, etc.) to request to delete the corresponding content, and transmits the result to the terminal 100.

In addition, the nPVR server 200 receives a list of the requested content of the user from the terminal management server 600 to record the terminal 100 in a predetermined cycle unit (for example, 1 day, 1 week, 1 month, etc.). By controlling the streaming node server 400 to delete content without a request or content that is not watched within a certain period of time after the reservation, the content of each streaming node server 400 is prevented from being continuously increased to prevent the streaming node server 400 from being increased. Capacity can be secured.

The broadcast transmission server 300 transmits a broadcast stream of live and reserved broadcasts. The broadcast transmission server 300 refers to any device that converts and transmits an analog signal or digital information so as to be suitable for broadcasting. The broadcast transmission server 300 receives broadcast data from an analog signal or a digital medium from a conventional broadcast device and streams it to the streaming node server 400. To send. The broadcast data transmitted from the broadcast transmission server 300 may receive n signals and transmit the plurality of different broadcast data.

3 is a configuration diagram illustrating a streaming node server applied to a distributed network PVR system according to an embodiment of the present invention.

The streaming node server 400 stores the broadcast stream received from the broadcast transmission server 300 as a file, and simultaneously transmits the broadcast stream to the terminal 100 in real time or via the wired / wireless Internet or has a user's request. When the stored broadcast stream is transmitted to the terminal 100.

The streaming node server 400 receives a broadcast stream from the broadcast transmission server 300 in a UDP multicast stream, RTSP or HTTP unicast stream, and the like, and then the video data is MPEG1, MPEG2, MPEG4, H. The video compression format of any of 261, H.263, H.264, MP4, FLV, and WMV, and the audio data is an audio compression format of any one of MPEG-1 / 2 Layer I / II / III, AC3, or ACC. It can be compressed and stored using, by extracting and storing the indexing information that can be streamed for the stored file can be delivered when there is a request of the recorded broadcast stream from the terminal 100. However, it is obvious that the data compression format scheme applied to the present invention is not limited to the above-mentioned data compression format schemes.

When transmitting the broadcast stream to the terminal 100, the streaming node server 400 may use an overlay multicast method, a peer to peer method, a grid network transmission method, FTP download, RTSP streaming, HTTP streaming method, and the like.

The streaming node server 400 may be configured in plural to cope with an overload of the server due to an increase in users, an increase in connection load to the same region, a failure, and the like. The streaming node server 400 may be controlled through the control of the nPVR server 200. ) Can be managed unattended, and the server connection environment for server load can be improved by having differentiated content for each streaming node server.

The streaming node server 400 may be hierarchically configured such as a relay center and a regional center to distribute network loads, thereby configuring a distributed connection environment. In addition, the streaming node server 400 may have several streaming node servers in the same layer. The hierarchical streaming node server 400 may be controlled by the node management server 500.

The streaming node server 400 of the relay center stores the broadcast stream transmitted from the broadcast transmission server 300 as a file, and serves as a connection server of the terminal 100 or relays to another streaming node server 400. To perform. In addition, the specific streaming node server 400 in the relay center may be configured as a backup streaming node server 410. Unlike the other streaming node server 400, the server designated as the backup streaming node server 410 maintains a large amount of storage to store the stored content for a long time. In this case, the frequency of use is small, but the content that needs to be stored is deleted in each streaming node server 400 and stored in the backup streaming node server 410, so that when the user wants to watch the streaming node server ( The content storage efficiency of 400) may be increased.

Data transmission between the hierarchical streaming node server 400 may be performed by an overlay multicast method, a peer to peer method, a grid network method, or the like.

When the terminal 100 requests the streaming node server 400 to be accessed for viewing a broadcast, the node management server 500 transmits a list of the streaming node servers 400 to which the terminal 100 is to connect to the terminal 100. In addition, the hierarchical node of the streaming node server 400 is centrally managed.

The node management server 500 may be configured such as system resource (HDD capacity, memory, CPU usage, etc.) and service resource (process, service port, service connection number of connections, etc.) or network reception state from the streaming node servers 400. Collecting information periodically, using this information to analyze the streaming server server 400 to request the streaming node server 400 to access for viewing or broadcast node server 400 to the streaming node server 400 to receive the streaming Informing the appropriate streaming node server 400 when a request is made, it is responsible for allocating another streaming node server 400 when a specific streaming node server 400 fails to connect to the corresponding server.

The terminal management server 600 checks whether the terminal 100 is authenticated by itself or in conjunction with an external authentication server, and records recording information and capacity information of the terminal 100 of the authenticated terminal 100 to the nPVR server 200. In addition, when the storage capacity of the terminal 100 is increased, the capacity may be increased only for the authorized terminal 100 by interworking with an external billing or a separate charging system. In addition, the terminal management server 600 periodically executes the internal schedule scheduler to add / change the reservation information for each terminal 100 at a corresponding time so that the corresponding content can be distinguished from a reserved state or a recorded state. do.

Since the terminal management server 600 holds the recording status information for each terminal 100, various types of customer management and marketing information such as content usage frequency, reservation recording status, popular content frequency, and usage status for each terminal are used. Can be collected.

The EPG server 700 transmits broadcast schedule information to the terminal 100, the nPVR server 200, and the streaming node server 400.

EPG (Electronic Program Guide) refers to broadcasting schedule information displayed on a screen of a digital TV through data broadcasting using an empty frequency band or a spare channel, and the EPG server 700 generates broadcast schedule information or external EPG information. In conjunction with the terminal 100, the nPVR server 200, the streaming node server 400 is reprocessed in a form that can be used, and transmits it at the request of each server. The broadcast schedule information is periodically updated, and a schedule ID is provided every time it is updated so that the terminal 100, the nPVR server 200, and the streaming node server 400 receiving the schedule information determine whether to update.

Hereinafter, the operation of the distributed network PVR system will be described with reference to the drawings.

4 is a flowchart illustrating recording broadcast viewing by a terminal applied to a distributed network PVR system according to an embodiment of the present invention.

Referring to FIG. 4, in order to view the recorded broadcast, the terminal 100 requests the EPG server 700 to reserve the recorded broadcast list (S101), and the EPG server 700 records the terminal for each terminal from the terminal management server 600. The broadcast information is received (S102) and the terminal 100 transmits a list for each content of the recorded broadcast (S103). The terminal 100 selects broadcast content that the user wants to watch (S104) and requests optimal access server information from the node management server 500 (S105) to receive an optimal streaming node server list from the node management server 500 (S105). In step S106, the terminal 100 receives data from the optimal streaming node server 400 (S107) to watch the broadcast.

5 is a flowchart illustrating a recording and a reservation recording method of a terminal applied to a distributed network PVR system according to an embodiment of the present invention.

Referring to FIG. 5, the terminal 100 requests the nPVR server 200 to store a broadcast currently being viewed in order to record a broadcast currently being viewed (S301). The nPVR server 200 periodically checks whether the schedule ID is changed from the EPG server 700 (S201), and when the schedule ID is changed (S202), receives the changed schedule ID from the EPG server 700 (S203). Receives, and receives the storage capacity information of the terminal 100 from the terminal management server 600 and analyzes it (S302) to check whether the terminal 100 has a free capacity to store (S303), if the terminal can be stored The broadcast reservation information of the 100 is transmitted to the terminal management server 600 and stored (S304). If there is no free capacity (S204) delivers the information that can not be stored to the terminal 100, the terminal 100 requests to delete the existing storage data for the non-storable information to secure the storage space or stop the storage operation Can be. Alternatively, an additional storage space may be allocated by requesting the nPVR server 200 to allocate additional storage space.

In order to reserve a broadcast, the terminal 100 requests the EPG server 700 for the entire broadcast schedule (S401), receives it (S402), selects the broadcast content desired for the reserved recording, and requests the storage to the nPVR server 200. (S403). The process is the same as the current broadcast recording.

6 is a flowchart illustrating a recording stop method of a terminal applied to a distributed network PVR system according to an embodiment of the present invention.

Referring to FIG. 6, in order to stop recording, the terminal 100 makes a recording stop request to the nPVR server 200 (S501). The nPVR server 200 determines whether there is recording information (S502), and if there is no recording information, receives the reservation information from the terminal management server 600 (S503). When the recording stop request broadcast is not currently being broadcast, the nPVR server 200 deletes the broadcast reservation information of the terminal 100 (S504) and transmits it to the terminal management server 600 (S505). However, if the recording stop request broadcast is currently being broadcast, the nPVR server 200 selects whether to delete the broadcast or stops recording (S506), and when deleting, deletes the broadcast reservation information of the terminal 100 (S504). This is transmitted to the terminal management server 600 (S505), in the case of the recording stop, and changes the broadcast reservation information of the terminal 100 (S507) and delivers it to the terminal management server 600 (S505).

7 is a flowchart illustrating the storage of a live broadcast stream and a transmission to a terminal of a streaming node server applied to a distributed network PVR system according to an embodiment of the present invention.

Referring to FIG. 7, the streaming node server 400 periodically checks whether the broadcast schedule ID is changed from the EPG server 700 (S601), and changes the broadcast schedule (schedule ID, schedule information) when the broadcast schedule ID is changed. It receives (S602), and receives a live broadcast stream from the broadcast transmission server 300 (S603). The received live broadcast stream analyzes the broadcast schedule information received from the EPG server 700 by the scheduler in the streaming node server 400, thereby storing the broadcast stream in the streaming node server 400 in units of schedules (S604). If it is the end time, the storage of the broadcast stream is terminated (S606) and may be transmitted to the terminal 100 in real time (step S605).

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

100: terminal 200: nPVR server
300: broadcast transmission server 400: streaming node server
410: streaming node server for backup 500: node management server
600: terminal management server 700: EPG server

Claims (22)

terminal;
An nPVR server for processing the recording information received from the terminal;
A broadcast transmission server for transmitting a broadcast stream; And
And a plurality of streaming node servers storing and transmitting broadcast stream data received from the broadcast transmission server to the terminal.
Distributed Network PVR System.
The method of claim 1,
When the terminal requests a streaming node server to be accessed for viewing the broadcast, the terminal further includes a node management server for transmitting a list of streaming node server to the terminal to the terminal;
Distributed Network PVR System.
The method of claim 1,
The terminal management server further comprises a reservation scheduler configured to check whether the terminal is authenticated, transmit information of the authenticated terminal to the nPVR server, and add / change reservation information for each terminal.
Distributed Network PVR System.
The method of claim 1,
EPG server which delivers broadcast schedule information to each server so as to correspond to a broadcast schedule information request of the terminal, the nPVR server and the streaming node server.
Distributed network PVR system further comprising.
The method of claim 1,
The terminal receives a broadcast by accessing a streaming node server located at the shortest distance among the received streaming node server lists.
Distributed Network PVR System.
The method of claim 5, wherein
The shortest distance may be determined by at least one criterion among an IP block, an AS number, a response speed, and a list order.
Distributed Network PVR System.
The method of claim 1,
The terminal can increase the available storage capacity of the streaming node server, characterized in that
Distributed Network PVR System.
The method of claim 1,
The nPVR server is characterized in that for controlling the streaming node server
Distributed Network PVR System.
The method of claim 1,
The nPVR server stores PVR information including broadcast channel information, broadcast time information, recording time information, and terminal information of the broadcast content based on the recording information received from the terminal.
Distributed Network PVR System.
The method of claim 1,
The streaming node server is characterized in that for transmitting the broadcast stream to the terminal in real time
Distributed Network PVR System.
The method of claim 1,
The streaming node server is configured hierarchically, and the node management server controls the hierarchical streaming node server.
Distributed Network PVR System.
The method of claim 1,
The streaming node server, characterized in that it comprises a streaming node server for backup
Distributed Network PVR System.
The method of claim 1,
The streaming node server is characterized in that to hold the content differentiated for each streaming node server
Distributed Network PVR System.
The method of claim 1,
The data transmission between the streaming node server and the terminal is performed by at least one of an overlay multicast method, a peer to peer method, a grid network transmission method, an FTP download, an RTSP streaming, and an HTTP streaming transmission method.
Distributed Network PVR System.
The method of claim 11,
Data transmission between the hierarchical streaming node server is characterized by at least one of the transmission method of the Overlay Multicast method, Peer to Peer method and grid network method
Distributed Network PVR System.
Receiving, by the streaming node server, the broadcast schedule information from the EPG server;
Receiving and storing the broadcast stream from the broadcast transmission server by the streaming node server;
Monitoring and managing the status of each streaming node server by a node management server;
Requesting, by the terminal, the nPVR server to record a specific broadcast content;
Checking and authenticating, by the nPVR server, the storage capacity of each terminal to the recording request;
Calculating, by the nPVR server, the remaining storage capacity of the terminal and storing information on broadcast content requested to be recorded;
When the terminal requests the stored broadcast content, the node management server searching for the location of the shortest-range streaming node server; And
Transmitting the stored broadcast content from the shortest range streaming node server to the terminal.
Distributed network PVR service method.
In the method for providing broadcast viewing in a distributed network PVR service,
Requesting, by the terminal, a broadcast list reserved for the EPG server;
Receiving, by the EPG server, the recorded broadcast information of the terminal from a terminal management server, and delivering the contents information of the recorded broadcast to the terminal;
Selecting the broadcast content by the terminal and making an optimal access server information request to a node management server; And
Receiving, by the terminal, a list of optimal streaming node servers from the node management server and then receiving data therefrom;
Distributed network PVR service method.
In the method for providing broadcast recording in a distributed network PVR service,
Requesting the terminal to store specific broadcast data to the nPVR server;
Receiving, by the nPVR server, storage capacity information of the terminal from a terminal management server; And
Transmitting broadcast reservation information to the terminal management server if the storage capacity information is suitable for storing the broadcast data.
Distributed network PVR service method.
The method of claim 18,
Delivering non-storable information to the terminal when the terminal storage capacity information is not suitable for storing the broadcast data; And
The terminal further comprises the step of requesting deletion of existing storage data, interruption of a storage operation, or allocation of additional storage space;
Distributed Network PVR Service Method.
In the method for providing broadcast recording stop in a distributed network PVR service,
Requesting, by the terminal, to stop broadcasting recording to the nPVR server;
Determining, by the nPVR server, whether there is recording information and receiving reservation information from a terminal management server by the nPVR server when there is no recording information;
If the recording stop broadcasting is currently being broadcast, the terminal selects a request to delete or stop recording, and in the case of deletion, the nPVR server deletes the broadcast reservation information of the terminal and transmits it to the terminal management server. In the case of the nPVR server after changing the broadcast reservation information of the terminal and transmitting to the terminal management server; And
If the recording stop broadcasting is not currently being broadcasted, the nPVR server deleting the broadcast reservation information of the terminal and transmitting it to the terminal management server;
Distributed Network PVR Service Method.
In the method for storing a broadcast in a distributed network PVR service,
Periodically checking, by the streaming node server, whether the broadcast schedule ID is changed from the EPG server;
Receiving, by the streaming node server, a broadcast schedule from the EPG server and receiving a broadcast stream from a broadcast transmitting server when the broadcast schedule ID is changed; And
A scheduler in the streaming node server analyzing the broadcast schedule information and storing the received broadcast stream in a schedule unit;
Distributed Network PVR Service Method.
The method of claim 21,
And after the streaming node server receives the broadcast stream from the broadcast transmission server, transmitting the received broadcast stream to the terminal in real time.
Distributed Network PVR Service Method.

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