WO2004079580A1 - Procede et systeme de distribution de donnees - Google Patents

Procede et systeme de distribution de donnees Download PDF

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Publication number
WO2004079580A1
WO2004079580A1 PCT/JP2003/002558 JP0302558W WO2004079580A1 WO 2004079580 A1 WO2004079580 A1 WO 2004079580A1 JP 0302558 W JP0302558 W JP 0302558W WO 2004079580 A1 WO2004079580 A1 WO 2004079580A1
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WO
WIPO (PCT)
Prior art keywords
data
distribution
client
streaming
streaming server
Prior art date
Application number
PCT/JP2003/002558
Other languages
English (en)
Japanese (ja)
Inventor
Hideomi Shiinoki
Hiroyuki Kojima
Original Assignee
Fujitsu Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2003/002558 priority Critical patent/WO2004079580A1/fr
Publication of WO2004079580A1 publication Critical patent/WO2004079580A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2385—Channel allocation; Bandwidth allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/612—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
    • H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/2668—Creating a channel for a dedicated end-user group, e.g. insertion of targeted commercials based on end-user profiles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content

Definitions

  • the present invention relates to a data distribution method and a data distribution system, and more particularly to a data distribution method and a data distribution system for performing streaming distribution.
  • Streaming distribution has been known as a method for distributing large volumes of data such as multimedia contents via networks and networks.
  • video content managed by a video 'on' demand (V0D) server is distributed via a network in response to a request from a client, and the client downloads all the video content before Instead of playing, it can be played in real time while receiving.
  • V0D video 'on' demand
  • V0D when a client wants to watch the video content they want to watch, they request the V0D server via the network and receive streaming streaming from the V0D server, so that the video content can be viewed at any time. it can.
  • the conventional V0D server has a video content management function and a distribution function, and can stream the content for each distribution request from the client. Therefore, depending on the processing capacity of the V0D server, even if multiple clients request the same video content at the same time, all requesting clients could see the same video content.
  • the streaming delivery from the V0D server to the client is usually performed by unicast.
  • a live server It is also possible to stream the real-time video from a server that distributes the real-time video or hardware dedicated to encoding that distributes the real-time stream (hereinafter referred to as a live server).
  • Such a problem is caused by the distribution processing being concentrated on the V0D server and the live server (hereinafter, these may be collectively referred to as a streaming server). Also, increasing the network speed and increasing the number of streaming servers that can be considered as a solution to this problem is costly.
  • an object of the present invention is to alleviate the concentration of distribution processing on a streaming server in a data distribution method and a data distribution system for performing streaming distribution. Disclosure of the invention
  • a first step in which a client requests data streaming distribution to a streaming server connected via a network
  • the streaming server streams the data to the client to any one of the distribution destinations of the data.
  • the client requests the streaming server connected via the network to perform the data streaming distribution in the same manner as in the past. I do.
  • the data is already stored in at least one distribution destination. Has already been delivered to
  • one of the distribution destinations of the data instructed becomes the distribution source, and the data is transmitted to the client. Streaming distribution.
  • the streaming server does not directly deliver the data in response to a delivery request from another client.
  • One of the distribution destinations of the data registered in the distribution destination management table can be the distribution source to distribute the data to the client, thereby alleviating the concentration of the distribution processing to the streaming server. Becomes possible.
  • the streaming server may request the client to distribute the data to any one of the distribution destinations of the data. And a fifth step in which the client requests any one of the data distribution destinations to distribute the data.
  • the streaming server instead of instructing any one of the distribution destinations of the data to distribute the data to the client, the streaming server performs the fourth step.
  • the streaming server instructs the client to request distribution of the data from any one of the distribution destinations of the data, and the client receiving the instruction performs the fifth step. Requesting one of the distribution destinations of the data to distribute the data.
  • one of the distribution destinations of the data requested by the client becomes a distribution source, and the data is transmitted to the client.
  • the streaming server itself does not directly distribute the data in response to a delivery request from another client.
  • Any one of the distribution destinations of the data registered in the distribution destination management table becomes a distribution source and can distribute the data to the client, which can reduce concentration of distribution processing to the streaming server. become.
  • the streaming server distributes the data to another client between the first step and the second step.
  • And may further include:
  • the client has a distribution function necessary for streaming distribution of data to another client. Is confirmed by the streaming server.
  • the streaming server performs, for example, by downloading a distribution function program, Install the distribution function on the client.
  • a client that receives data directly from the streaming server or indirectly via another client always has a delivery function. Therefore, the client to which the data is to be distributed can reliably distribute the data as a distribution source when receiving an instruction from the streaming server or a request from another client.
  • the distribution destination management template holds the network information of the distribution destination of the data
  • the streaming server stores the network information of the distribution destination of the data in the data distribution destination. Based on this, a distribution destination of the data to be distributed to the client may be selected from a plurality of distribution destinations of the data.
  • the distribution destination management table holds network information (for example, IP address) of the distribution destination of the data, so that the streaming server can distribute the network information of the data and the network information of the client. And using the network information of the distribution destination of the data as a criterion when selecting a distribution destination of the data to be distributed to the client from among a plurality of distribution destinations of the data. I can do it.
  • network information for example, IP address
  • the distribution destination of the data belonging to the same or closest network segment as the client that has requested the distribution can be selected as the distribution source. It becomes possible to perform efficient streaming distribution.
  • the above data distribution method may be configured so that the streaming server can directly distribute the data even if at least one distribution destination of the data is registered in the distribution destination management table. If the condition is satisfied, the streaming server may further include an eighth step of directly delivering the data to the client.
  • the streaming server directly distributes the data in the eighth step.
  • the data distribution destination is registered in the distribution destination management table, the data is not transmitted from the data distribution destination but from the streaming server according to the concentration of distribution processing to the streaming server. Can be distributed directly.
  • the data may be stored in a storage device of the streaming server, and the client stores a copy of the distributed data in its own memory. You may also have a ninth step to save.
  • the data is stored in the storage device of the streaming server, for example, as video content in a VOD (Video On Demand) server, in a ninth step, a copy of the distributed data is stored in the storage device.
  • the client saves it in its own memory.
  • the client distributes the data to another client as a distribution destination of the data selected later, the client distributes the copy of the data stored in the memory by streaming.
  • the client sends a completion notification to the streaming server when the storage of the data in the memory is completed, and the streaming server sends the completion notification to the streaming server.
  • the streaming server registers only the client that has sent the completion notification to the streaming server in the distribution destination management table as the distribution destination of the data in the eleventh step.
  • the client is registered in the distribution destination management table as a distribution destination of the data, and distribution to another client is started. Can be avoided.
  • the streaming ′ server may further include a thirteenth step of deleting, from the distribution destination management table, a distribution destination of the data that has performed the deletion notification.
  • the distribution destination of the data registered in the distribution destination management table sends a deletion notification to the streaming server in the twelfth step. In step, it is deleted from the distribution destination management table by the streaming server.
  • the distribution destination of the data that cannot be streamed as a distribution source because the data has been deleted from the memory is deleted from the distribution destination management table.
  • the data may be real-time stream data
  • the distribution source may stream the data to the client by relaying the data.
  • the distribution source relays the data to perform streaming distribution to the client.
  • the distribution source may not be able to interrupt the streaming distribution by relaying the data.
  • a request for streaming distribution of the data is received from the management table and at least one distribution destination of the data is registered in the distribution destination management table, one of the distribution destinations of the data is And a streaming server having a distribution processing unit for instructing the client to perform streaming distribution of the data, wherein the client operates as another one of the distribution destinations of the data.
  • the distribution processing unit instructs to stream the data to the distribution source, Is characterized by streaming the data to the client connexion said another.
  • the data distribution system comprises a client connected to a network and a streaming server for streaming data distribution via the network, and the streaming server distributes the data. It has a distribution destination management table for registering destinations and a distribution processing unit.
  • the distribution processing unit When receiving a request for streaming distribution of the data from the client, the distribution processing unit, when at least one distribution destination of the data is registered in the distribution destination management table, reduces the distribution amount of the data. Since the data has already been distributed to one distribution destination, one of the distribution destinations of the data is instructed to stream the data to the client.
  • the distribution processing unit sends the data to another client as one of the distribution destinations of the data. May be instructed to be streamed.
  • the client follows the instruction and streams the data to the another client as the distribution source.
  • the streaming server In the case of data that is distributed by streaming, in response to a distribution request from another client, the streaming server itself distributes the data directly, without transmitting the data registered in the distribution destination management table.
  • One of the distribution destinations becomes the distribution source, and the data can be distributed to the client, so that the concentration of the distribution processing to the streaming server can be eased.
  • the distribution processing unit instructs the client to request distribution of the data to any one of the distribution destinations of the data.
  • the distribution unit may request one of the distribution destinations of the data to distribute the data.
  • the delivery processing unit sends the data to any one of the data delivery destinations to the client.
  • One is instructed to request distribution of the data.
  • the client that has received the instruction from the distribution processing unit requests one of the distribution destinations of the data to perform streaming distribution of the data, and thereby, the client receives one of the distribution destinations of the data. Receives streaming distribution of the data. This may cause the client to be requested by another client to stream the data as one of the destinations of the data
  • the client becomes a distribution source and distributes the data to the another client by streaming.
  • the distribution processing unit checks whether or not the client has a distribution function of distributing the data to another client. If the client does not have the distribution function, the distribution function program may be installed on the client.
  • the distribution processing unit confirms whether or not the client has a distribution function necessary for streaming distribution of data to another client, and the client has the distribution function. If it is confirmed that the distribution function is not installed, the distribution function is installed on the client, for example, by downloading a distribution function program.
  • the distribution destination management table holds network information of a distribution destination of the data, and the distribution processing unit performs a plurality of distribution based on the network information of the distribution destination of the data.
  • the distribution destination of the data to be distributed to the client may be selected from the distribution destinations of the data.
  • the delivery destination management table holds the network information (for example, IP address) of the delivery destination of the data, so that the delivery processing unit stores the network information of the delivery destination of the data and the network information of the client. It is possible to make a comparison, and use the network information of the distribution destination of the data as a criterion when selecting the distribution destination of the data to be distributed to the client from among the distribution destinations of the data. Can be done.
  • the distribution destination of the data belonging to the same or closest network segment as the client that has requested the distribution can be selected as the distribution source, and more efficient streaming distribution can be performed.
  • the data distribution system described above is capable of directly distributing the data even if at least one distribution destination of the data is registered in the distribution destination management template. If the condition is satisfied, the distribution processing unit may directly distribute the data to the client.
  • the distribution processing unit distributes the data directly to the client.
  • the data distribution destination is registered in the distribution destination management table, the data is not transmitted from the data distribution destination but from the streaming server according to the concentration of distribution processing to the streaming server. Can be distributed directly.
  • the data is transmitted in the streaming format.
  • the client may store the distributed copy of the data in a memory of the client device.
  • the client when the data is stored in the storage device of the streaming server, for example, as video content in a V0D (Video On Demand) server, the client copies the distributed data to its own device. Save to memory. Accordingly, when the client distributes the data to another client as a distribution destination of the data selected later, the client distributes the copy of the data stored in the memory by streaming.
  • V0D Video On Demand
  • the client when the client finishes saving the data in the memory, the client notifies the streaming server of the completion, and the streaming server only sends the completion notification to the client. May be registered in the distribution destination management table as a distribution destination of the data.
  • the streaming server is notified of the completion by the streaming server. Register on the table.
  • the client is registered in the distribution destination management table as a distribution destination of the data, and distribution to another client is started. Can be avoided.
  • the distribution destination of the data registered in the distribution destination management table deletes the data from the memory
  • the distribution destination sends a deletion notification to the streaming server, and the streaming server
  • the distribution destination of the data for which the deletion notification has been made may be deleted from the distribution destination management table.
  • the distribution destination of the data registered in the distribution destination management table when deleting the data from the memory, notifies the streaming server of the deletion, whereby the distribution server Deleted from the destination management table.
  • the distribution destination of the data that cannot be streamed as a distribution source because the data has been deleted from the memory is deleted from the distribution destination management table. Has a Only distribution destinations that can stream data can be registered.
  • the data may be real-time stream data
  • the distribution source may perform streaming distribution to the client by relaying the data. Good.
  • the distribution source performs streaming distribution to the client by relaying the data.
  • the distribution source may not be able to interrupt streaming distribution by relaying the data.
  • FIG. 1 is a block diagram showing an embodiment (1) of a data distribution method and a data distribution system according to the present invention.
  • FIG. 2 is a sequence diagram showing a content distribution processing procedure in the embodiment (1).
  • FIG. 3 is a block diagram showing an embodiment (2) of the data distribution method and data distribution system according to the present invention.
  • FIG. 4 is a flowchart showing an example of the content distribution processing of the server 100 in the embodiment (2).
  • FIG. 5 is a sequence diagram showing an operation procedure example of registration and deletion of a distribution destination in the distribution destination management table 20 in the data distribution method and the data distribution system according to the present invention. Explanation of reference numerals 100 VOD server
  • V0D video-on-demand
  • FIG. 1 shows an example of a V0D system to which a data distribution method and a data distribution system according to the present invention are applied, wherein clients A and P are connected via a network 200 to a V0D server 100 that performs streaming distribution of video contents 10. Have been.
  • a distribution destination management table 20 that manages the distribution destination of the streaming distribution of each of the contents C1 to C4 is provided.
  • the destination management table 20 shown in the figure is an example at the time when the contents C1, C2, and C4 are distributed to clients P, B, and C, respectively (clients B and C are not shown). It is shown.
  • the distribution processing unit 30_S that performs the distribution process reads out each of the contents C1 to C4 from the video content 10, and performs streaming distribution to the requesting client as needed.
  • Clients A and P have content storage areas 40_A and 40-P, respectively, and further have distribution processing units 30-A and 30-P.
  • the distribution processing units 30_A and 30-P respectively transmit content from the content storage areas 40_A and 40-P. Read the relevant content and perform streaming distribution.
  • a plurality of clients similar to these are connected to the network 200 in addition to the clients A and P, and the same as the clients A and P described below.
  • the contents C1 to C4 can be received from the V0D server 100 in a simple procedure.
  • FIG. 2 shows a procedure in which the content C1 is distributed from the V0D server 100 to the clients P and A in the configuration of FIG.
  • client P requests content C1 from V0D server 100 (message Ml).
  • the V0D server 100 checks whether or not the client P has a distribution function (M2 in the same manner).
  • Client P notifies V0D server 100 that it has no distribution function (M3). Therefore, the V0D server 100 performs a distribution function installation process on the client P (step S100_P).
  • a client specifying process (S200_P in the same manner) is performed in order to confirm whether or not there is a distribution destination that has already distributed the content C1.
  • the V0D server 100 directly streams the content C1 to the client P (S300_P;). At this time, the client P stores a copy of the distributed content + C1 in the content storage area 40-P.
  • the client A requests the content C1 from the V0D server 100 (message M4).
  • the V0D server 100 confirms whether or not the client A has the distribution function as in the case of the client P in the above (1) (M5).
  • client A has a distribution function
  • client A notifies V0D server 100 that it has a distribution function (M6). Young cry If the client A does not have the distribution function, the fact is notified to the V0D server 100, and the same distribution processing installation processing as in the case of the client P described above is performed (not shown).
  • the V0D server 100 since the client A already has the distribution function, the V0D server 100 that has received the message M6 performs the client identification processing without performing the distribution processing installation processing (step S200_A).
  • the client P is registered in the distribution destination management table 20 in the V0D server 100 in association with the content C1 (see the distribution destination management table 20 in FIG. 1).
  • the V0D server 100 specifies the client P and instructs the client P to deliver the content C1 to the client A (message M7).
  • the client P receiving the message M7 becomes a distribution source, and distributes a copy of the content C1 stored in the content storage area 40-P from the distribution processing unit 30-P to the client A by streaming (S300-A in the same manner).
  • the client A stores a copy of the distributed content C1 in the content storage area 40-A.
  • the V0D server 100 sends the message M7 to the client A instead of sending the message M7 to the client P. It may be instructed to make a request (message M8). In this case, client A receiving message M8 requests content P1 from client P (message M9).
  • the client P which has received the message M9, becomes the distribution source in the same manner as in the case of 3 above, and transmits a copy of the content C1 stored in the content storage area 40—P to the client A from the distribution processing unit 30—P.
  • Figure 3 shows the V0D server 100 and clients A and P shown in An ant PP is shown connected to the network 200.
  • the IP address of the client is held as network information of each distribution destination.
  • the client C IP address: 192.168.2.2.30
  • the client D registered as the distribution destination of the content C3
  • E IP address: 192.168. 1.50
  • clients C and D are sent to client PP (IP Address: 192.168. 2.10)
  • client PP IP Address: 192.168. 2.10
  • client E is client A (IP address: 192.168.1.10)
  • client P IP address: 192.168
  • the video content 10 and the distribution processing unit 30_S in the V0D server 100, the respective content storage areas 40-A and 40-P in the clients A and P, and the distribution processing units 30_A and 30-P are omitted. Have been.
  • the clients PP and P are registered as the distribution destinations of the content C1
  • the client C is registered as the distribution destination of the content C2.
  • Clients D and E are registered as distribution destinations of content C3.
  • client A requests distribution of content C1 to V0D server 100.
  • the V0D server 100 which has received the distribution request for the content C1 from the client A, first searches the distribution destination management table 20 for the distribution destination of the content C1 in step S1. In step S2, it is confirmed whether or not there is a client registered as the distribution destination of the content C1 in the distribution destination management table 20.
  • step S2 After registering the client A as the distribution destination of the content C1 in the distribution destination management table 20, the content C1 is distributed to the client A in step S4.
  • step S5 the registration of a plurality of clients is performed. Check if there is.
  • step S6 When only one client (for example, only client P) is registered as the distribution destination of the content C1, in step S6, for example, the client P is specified, but in the example of the distribution destination management table 20 shown in FIG. Since the clients PP and P have already been registered as the distribution destinations of the content C1, the client P closest to the client A is specified in step S7.
  • step S8 the V0D server 100 instructs the specified client P to deliver the content C1 to the client A.
  • step S9 the V0D server 100 stores the content of the content C1 in the delivery destination management table 20. Register as.
  • step S8 the V0D server 100 may instruct the client A to request the specified client P to request the distribution of the content C1.
  • the method of identifying the client P closest to the client A in the above step S7 is as follows.
  • a client requesting content distribution (client A in Fig. 4) and a plurality of distribution destination clients registered as distribution destinations of the content requested by the client (client PP and For P), the logical product of each IP address and the mask condition [FFFFFF00 (255.255.255.0)] was obtained, and the IP address and the mask condition of the client requesting the content distribution were obtained Identify the destination client of the IP address that is the logical product that matches the logical product.
  • the mask condition is sequentially set to [FFFF0000 (255. 255. 2 55. 0. 0. 0)] and [FFFFFF00 (255. 255. 255. 0)], and find the one that matches. Even if the mask condition is [FFFFFF00 (255. 255. 255. 0)], the client cannot be specified. Otherwise, the client registered at the top as the distribution destination of the content corresponding to the distribution destination management table 20 is specified.
  • the IP addresses of the client PP and P registered as the distribution destination of the client A and the content C1 are [192.168. 1.10], [192.168. 2.10], And [192. 168. 1.20], the mask condition [FFFFFFOO (255. 255. 255.
  • a flow is shown in which the client A is registered in the distribution destination management table 20 before the content C1 is distributed to the client A.
  • the client A may be instructed by the V0D server 100 to become a distribution source and distribute to another client.
  • the distribution destination may be registered in the distribution destination management table 20 after the distribution of the content is completed as shown in FIG.
  • the V0D server 100 confirms that the distribution destination has not been registered in the distribution destination management table 20 as in the case of FIG. 22, and then distributes the content C1 directly to the client P. (S300-1P).
  • the client P When the client P has finished storing the copy of the content C1 in the content storage area 40_P, the client P notifies the delivery completion of the content C1 (message M10), and the V0D server 100 receives the message M10 for the first time after receiving the message M10. P is registered in the distribution destination management table 20 as the distribution destination of the content C1.
  • the V0D server 100 has already registered the client P in the distribution destination management table 20 as the distribution destination of the content C1 in the client identification processing (step S200—A), as in the case of 3 in FIG. Is delivered to client A to client P.
  • Send a message (message M12).
  • the client P that has received the message M12 performs distribution processing of the content C1 (S300—A).
  • the client A When the client A finishes storing the copy of the content C1 in the content storage area 40_A, the client A notifies the delivery completion of the content C1 (message M13), and the V0D server 100 receives the message M13 for the first time after receiving the message M13.
  • A is registered in the distribution destination management table 20 as the distribution destination of the content C1.
  • the clients P and A After registering the clients P and A in the distribution destination management table 20 as described in 1 above, the clients P and A delete the copy of the content C1 from the content storage areas 40-P and 40_A of the own device, respectively.
  • the client P sends a content C1 data deletion notification (message M14) to the V0D server 100, and the V0D server 100 deletes the information of the client P from the distribution destination management table 20, as shown in FIG. (S500-1P), and the client P deletes the data of the content C1 from the content storage area 40-P (S600-P).
  • the client A sends a content C1 data deletion notification (message M15) to the V0D server 100, and the V0D server 100 deletes the information of the client A from the distribution destination management table 20 (S500_A) and the client P Deletes data of content C1 from content storage area 40-P (S600-A)
  • the V0D system is used as an example.
  • a live server that distributes live video for example, in FIG. Can be replaced with a live 'server.
  • the live server does not hold the video content 10, and distributes, for example, a live video captured by a TV camera or the like directly from the distribution processing unit 30_S.
  • the clients A and P do not need the content storage areas 40_A and 40-P, and need only relay the data distributed by streaming to another client.
  • the distribution destination management table 20 may be the same as the distribution server management table 20 shown in FIG. Similarly, for multiple contents C1-C4 The client currently being distributed may be registered as a distribution destination in association with a plurality of corresponding live videos L1 to L4 (not shown).
  • the distribution processing units 30_A and 30_P of each of the clients A and P may perform streaming distribution to a plurality of different clients simultaneously.
  • the client when at least one distribution destination corresponding to the requested content is registered in the distribution destination management table 20, the client is identified and the identified client is addressed to another client.
  • streaming distribution is used, for example, the number of clients that can be directly distributed by the V0D server 100 is set as a predetermined threshold, and the number of clients that does not exceed the predetermined threshold, that is, there is a margin in the processing capacity of the V0D server 100
  • the V0D server 100 may directly distribute the content to the client that has made the distribution request.
  • a client requests a streaming * server connected via a network to perform streaming distribution of data, and
  • the streaming server transmits the data to one of the distribution destinations of the data. Is instructed to perform streaming distribution to the client, and any one of the distribution destinations of the data that has received the instruction becomes a distribution source, and the data is streamed to the client. It is possible to reduce the concentration of distribution processing to streaming servers.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

Procédé et système de distribution de données servant à effectuer une distribution en continu. Au moment d'une demande d'un client à un serveur en continu connecté par l'intermédiaire d'un réseau d'effectuer une distribution continue de données et si la table de gestion de destination de distribution servant à enregistrer la destination de distribution des données contient au moins une destination, le serveur commande à une de ces destinations de distribuer en continu les données au client. Une de ces destinations ayant reçu l'instruction de distribution devient une origine de distribution et distribue en continu les données au client.
PCT/JP2003/002558 2003-03-05 2003-03-05 Procede et systeme de distribution de donnees WO2004079580A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005107259A1 (fr) * 2004-05-04 2005-11-10 Anytime Pte Ltd Diffusion en continu d'un contenu numerique sur internet

Citations (7)

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JPH1168744A (ja) * 1997-08-26 1999-03-09 P I Ii:Kk 情報配信システムの制御方法および情報配信システム
JP2001222500A (ja) * 1999-12-01 2001-08-17 Sharp Corp ネットワークゲートウェイにおけるプログラムの配布方法
JP2002084321A (ja) * 2000-09-08 2002-03-22 Institute For Welcome System Ltd サーバからのリアルタイムデータ送信において、もっとも速くデータ転送可能なクライアントをサーバの代替として使う方法および機構
JP2002158657A (ja) * 2000-11-16 2002-05-31 Nec Corp ストリーム配信方法及びストリーム配信システム
JP2002244906A (ja) * 2001-02-13 2002-08-30 Information & Mathematical Science Laboratory Inc ネットワークシステム及びその情報共有方法
JP2002259259A (ja) * 2001-02-27 2002-09-13 Canon Inc 画像データ通信システム、画像データ通信方法および記憶媒体
JP2003006087A (ja) * 2001-06-19 2003-01-10 Sony Corp 情報処理装置および方法、プログラム、並びに記録媒体

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1168744A (ja) * 1997-08-26 1999-03-09 P I Ii:Kk 情報配信システムの制御方法および情報配信システム
JP2001222500A (ja) * 1999-12-01 2001-08-17 Sharp Corp ネットワークゲートウェイにおけるプログラムの配布方法
JP2002084321A (ja) * 2000-09-08 2002-03-22 Institute For Welcome System Ltd サーバからのリアルタイムデータ送信において、もっとも速くデータ転送可能なクライアントをサーバの代替として使う方法および機構
JP2002158657A (ja) * 2000-11-16 2002-05-31 Nec Corp ストリーム配信方法及びストリーム配信システム
JP2002244906A (ja) * 2001-02-13 2002-08-30 Information & Mathematical Science Laboratory Inc ネットワークシステム及びその情報共有方法
JP2002259259A (ja) * 2001-02-27 2002-09-13 Canon Inc 画像データ通信システム、画像データ通信方法および記憶媒体
JP2003006087A (ja) * 2001-06-19 2003-01-10 Sony Corp 情報処理装置および方法、プログラム、並びに記録媒体

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005107259A1 (fr) * 2004-05-04 2005-11-10 Anytime Pte Ltd Diffusion en continu d'un contenu numerique sur internet

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