KR100853381B1 - System for real time internet broadcast service and management method thereof - Google Patents

Abstract

A real time internet broadcast service system and a management method thereof are disclosed. A system for providing real-time internet broadcasting in a peer-to-peer manner is managed by a group master peer, which is a broadcasting server receiving broadcast contents from a broadcaster and transmitting corresponding broadcast data, and by the group master peer. It includes a local master peer that transmits the received broadcast data in a peer-to-peer manner to one or more simple peers to be coupled dependently, wherein the local master peer is included in the same group layered in a tree structure and peer-to-peer It is a simple peer of the highest layer among a plurality of simple peers for transmitting broadcast data in a manner, and each group may be created, separated, or merged by connection or disconnection of the simple peers.

Internet broadcasting, P2P, group management

Description

Real-time internet broadcasting service system and its management method {SYSTEM FOR REAL TIME INTERNET BROADCAST SERVICE AND MANAGEMENT METHOD THEREOF}

1 to 3 are diagrams for explaining a conventional real-time Internet broadcasting service system.

4 is a diagram illustrating a real-time Internet broadcast service system according to an embodiment of the present invention.

5 and 6 are diagrams for explaining a group management method of a real-time Internet broadcast service system according to an embodiment of the present invention.

7A to 12B are diagrams for explaining a group addition method in a group management method of a real-time Internet broadcasting service system according to an embodiment of the present invention.

13A to 17B are diagrams for explaining a group leaving method in a group management method of a real-time Internet broadcasting service system according to an embodiment of the present invention.

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

100: center peer 200: GM peer

200: station 210: LM peer

500: simple peer

The present invention relates to a real-time Internet broadcasting service system and a management method thereof, and more particularly, to a P2P-based real-time Internet broadcasting service system of a group management method and a management method thereof.

Recently, Internet contents are rapidly moving from large amounts of text-oriented data to large-capacity multimedia data with complex functions such as voice, video, and video due to the expansion of high-speed subscriber networks and the advancement of network-based technologies such as Internet data centers.

Methods of transmitting multimedia data through the Internet include a download method in which a client downloads and reproduces the entire multimedia data and a streaming method in which multimedia data is sequentially received and played simultaneously. The streaming method of transmission is mainly used in real-time Internet broadcasting because it can transmit the same content to multiple clients at the same time.

Internet broadcasting is a service that provides multimedia data to clients in real time or through a Video On Demand (VOD) service through the Internet. In implementing such Internet broadcasting, a large amount of multimedia data must be simultaneously transmitted to a plurality of clients. Due to physical limitations such as connection line capacity and transmission speed, a more efficient streaming method is required.

As such a streaming transmission method, the unicast method and the multicast method are generally used.

The unicast method is a method in which one sender transmits data to only one receiver, and is widely used in conventional Internet applications or Internet broadcasts. The unicast method is easy to implement due to its simple configuration, but at the same time, the Internet server to which a large number of users access the data packet to be transmitted must be transmitted to each receiver separately, thereby increasing the load on the broadcast server side. there is a problem. In particular, as the number of recipients increases, this problem becomes larger.

The multicast method is a method in which one sender transmits data to a specific group of recipients and is applied to Internet video conferencing and the like. The multicast method is more suitable for Internet broadcasting because data packets can be transmitted to multiple receivers at one time, thereby minimizing waste of network resources due to redundant transmission of data. However, even though the multicast Internet broadcasting service system has such an advantage, most routers on the Internet support only unicast. Since multicast group settings are required for all router devices in the packet route, a multicast implementation is practically impossible in the current Internet environment.

1 to 3 are diagrams for explaining a conventional real-time Internet broadcasting service system.

1 is an Internet broadcast service system providing a real-time Internet broadcast service in a multicast manner. As shown in FIG. 1, an Internet broadcasting server, which is a server that converts content received from a broadcasting station and provides real-time Internet broadcasting, transmits broadcast data to a plurality of client computers using a multicast router. As the multicast Internet broadcasting service system described above, most routers on the Internet currently support unicast only. Therefore, in order for a user to receive streaming data using multicast, all of the packets in the packet route to the broadcasting server and the client system are required. There is a problem in that the router equipment needs the multicast group setting, and therefore, an internet network provider needs help.

2 is an Internet broadcasting service system that provides a real-time Internet broadcasting service in a client server method. As shown in FIG. 2, the plurality of broadcast servers transmit broadcast data to the plurality of client computers in a unicast manner. As described above, the unicast Internet broadcast service system has a problem in that it cannot provide a smooth internet broadcast service because there is a limit on the number of clients that can be serviced according to the capacity of the broadcast server and the network bandwidth.

3 is an internet broadcasting service system for providing a P2P based real-time internet broadcasting service. As shown in FIG. 3, the peer to peer (P2P) Internet broadcasting service system is an Internet broadcasting service system in which a client requests a service from another client receiving a service instead of accessing a broadcast server. .

However, the above-described P2P type internet broadcasting service system has a problem in that, when managing clients in a general tree manner, the service participation and withdrawal of the clients frequently occurs, and the load for managing them rapidly increases.

Accordingly, the present invention is to solve the above problems, the present invention is a real-time Internet broadcasting service system and management method for providing a P2P-based real-time Internet broadcasting method that is efficient and low load by managing a plurality of clients as a group It is to provide.

In addition, the present invention is to provide a real-time Internet broadcasting service system and a management method for providing a P2P-based real-time Internet broadcasting method that can provide an Internet broadcasting service without modification of a conventional network hardware router.

In addition, the present invention provides a P2P-based real-time Internet broadcasting method capable of providing Internet broadcasting services to a plurality of clients with a relatively inexpensive server investment compared to the client server method by managing a plurality of clients in groups and providing Internet broadcasting in a P2P manner. The present invention provides a real-time internet broadcasting service system and a management method thereof.

Other objects of the present invention will be easily understood through the following description.

According to an aspect of the present invention for achieving the above object, a real-time Internet broadcast service system is disclosed.

A system for real-time Internet broadcasting service in a peer-to-peer manner according to an embodiment of the present invention is a group master peer which is a broadcast server receiving broadcast content from a broadcaster and transmitting corresponding broadcast data. A local master peer managed by a group master peer and transmitting the received broadcast data to one or more simple peers dependently coupled in a peer-to-peer manner, wherein the group master peer belongs to a simple layer belonging to a lower layer. Receive peer status information from peers periodically or when a specific event occurs, and control whether to provide broadcast data according to peer status information.The local master peer is included in the same group, layered in a tree structure, and broadcasted in a peer-to-peer manner. Highest level of multiple peers that carry data Simple peer, and may by the disconnection or connection of simple peers, each group can be created, separate or combined.

According to another aspect of the present invention, there is provided a method for managing a real-time Internet broadcast service and / or a recording medium on which a program for performing the method is recorded.

According to an embodiment of the present invention, a method of managing a real-time internet broadcasting service by a group master peer of a real-time internet broadcasting service system includes the steps of a withdrawing peer disconnecting to terminate watching a real-time internet broadcasting and belonging to the withdrawing peer. And requesting access from a local master peer to which the withdrawn peer belongs, wherein the real-time internet broadcasting service system is a broadcast server receiving and providing broadcast contents from a broadcaster. Master may include the Local Master peer that receives broadcast data from the peer and the group master peer to provide broadcast data in a peer-to-peer manner to simple peers managed in a group unit of a tree structure.

According to another embodiment of the present invention, a method in which a group master peer of a real-time internet broadcasting service system manages a real-time internet broadcasting service, includes the step of disconnecting a peer from the peer to terminate the real-time internet broadcasting service, and And requesting a connection from a child peer to which a local master peer belongs to the withdrawal peer, wherein the real-time Internet broadcasting service system is a group master which is a broadcast server receiving and providing broadcast content from a broadcaster. Group Master) and the Local Master peer for receiving broadcast data from the group master peer and providing broadcast data in a peer-to-peer manner to simple peers managed in group units in a tree structure. .

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. 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 there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination 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 construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

4 is a diagram illustrating a real-time Internet broadcast service system according to an embodiment of the present invention.

Referring to FIG. 4, the real-time internet broadcasting service system according to the present invention manages a simple peer, which is a client PC requesting access for a real-time internet broadcasting service, as a group, and manages a plurality of group masters. The peer manages simple peers in each group. That is, the real-time Internet broadcast service system according to the present invention is a method of distributing the load of the central server for delivering broadcast data to all simple peers to the GM peer of a plurality of groups.

The real-time Internet broadcasting service system according to the present invention includes a broadcaster 400 providing broadcast contents, GM peers 200 and 300 peers (CPs) peers, which are Internet broadcasting servers providing real-time Internet broadcasting, and addresses of GM peers. The center peer 100, which is a server that manages information, and the simple peers, which are clients requesting connection for a real-time Internet broadcast service, are included. In addition, the real-time Internet broadcasting service system according to the present invention manages a plurality of simple peers as a group, a local master (hereinafter referred to as "LM") that is a simple peer for managing one group (210, 220, 230) 310, GM peers 200 and 300 that manage channels of respective Internet broadcasts. Each GM peer 200 and 300 manages LM peers in the same channel. Here, the channel may be a group of groups requesting access for the same broadcast service.

 In addition, in the real-time Internet broadcasting service system according to the present invention, a simple peer (including a local master peer) belonging to each group is configured in a tree structure so that a parent simple peer delivers broadcast data to child simple peers. For example, a simple peer belonging to each group has a binary tree structure so that a simple peer of a higher generation can deliver broadcast data to a maximum of two simple peers of a child generation in a peer to peer manner. have. Since a method of delivering data in a peer-to-peer manner is apparent to those skilled in the art, a description thereof will be omitted.

In addition, the depth of the tree structure corresponding to the group may be adjusted by the LM peers 210, 220, 230, and 310, so that the number of simple peers belonging to one group may be adjusted. This is to minimize the delay time for transmitting real-time Internet broadcast data. In the real-time Internet broadcasting service system according to the present invention, since the group is composed of a tree structure, separation and merging of groups may occur frequently, and when a new group is created or separated, most of the simple peers belonging to The simple peer located at the top of the tree structure is selected as the LM peer to manage the group.

The center peer 100 is a server that manages address information of GM peers 200 and 300 that provide real-time Internet broadcasting. The cent peer 100 provides the simple peer 212 with address information of the GM peers 200 and 300 managing the corresponding channel at the request of the simple peer 212 to receive the real-time Internet broadcasting service.

The GM peers 200 and 300 manage the LM peers 210, 220, 230, and 310 in the channel as CP peers, which are Internet broadcast servers managing one channel of a real-time internet broadcast. Instead of transmitting broadcast data to all simple peers, the GM peers 200 and 300 distribute the load of the central server by transmitting broadcast data to the LM peers 210, 220, 230, and 310 of the corresponding channel.

The LM peers 210, 220, 230, and 310 are simple peers managing one group in the same channel, and manage simple peers belonging to a corresponding group. Here, a group is a collection of one LM peer and simple peers under the management of that LM peer. The LM peers 210, 220, 230, and 310 manage address information of the belonging simple peers, and manage the simple peers by updating peer state information from the belonging simple peers. The LM peers 210, 220, 230, and 310 divide or merge the managing group by comparing the number of peers to which the peers belong to the set threshold. Here, the threshold value may be set according to the server capacity of the GM peer and the LM peer, the tree structure depth of the simple peer included in the group, and the network bandwidth.

The broadcaster 400 provides the broadcast content to the GM peers 200 and 300 corresponding to each channel. The broadcaster 400 may generally be a company that produces and supplies broadcast content, for example, KBS, MBC, or SBS.

5 and 6 are diagrams for explaining a group management method of a real-time Internet broadcasting service system according to an embodiment of the present invention.

In the real-time internet broadcasting service system according to the present invention, the GM peer 200, which is an internet broadcasting server managing one channel of internet broadcasting, manages LM peers 210, 212, 214, and 216 managing each group. The LM peer 210 may be a parent LM peer 210 that receives broadcast data directly from the GM peer 200 and a child LM peer 212, 214, 216 that receives internet broadcast data from the parent LM peer 210. have. Parent LM peer 210 may be divided into three groups by dividing the group, as shown in Figure 5, when the simple peer is difficult to manage as a group, the load, such as server capacity or network bandwidth is difficult. . When groups are separated, a simple peer located at the top of the separated group tree structure is selected as an LM peer to manage the separated groups. In this way, the child LM peer 212 managing the separated group manages the simple peer 213 to which the corresponding group belongs.

As shown in FIG. 6, in the real-time internet broadcasting service system according to the present invention, when the number of simple peers belonging to a group increases in the LM peer 214 managing one group, smooth real-time internet broadcasting due to a load problem. Because the service cannot be provided, the group can be divided into several groups. In this case, one of the simple peers of the separated group is selected as the LM peer 214 to manage the separated group.

In addition, when the LM peer 217 managing one group decreases the number of simple peers belonging to a group, the real-time Internet broadcasting service system according to the present invention may be managed by being merged with another group. This is to reduce the load of the GM peer managing the LM peers 216 and 217.

As described above, the real-time Internet broadcast service system according to the present invention can provide an efficient Internet broadcast service by managing the load by the automatic group separation and merging procedure. Here, the number of simple peers belonging to one group, which is a standard for separating and merging groups, may vary according to server capacity of GM peers and LM peers, tree structure depth of the group, and network bandwidth.

7A to 12B are diagrams for explaining a group addition method in a group management method of a real-time Internet broadcasting service system according to an embodiment of the present invention.

In the real time internet broadcasting service system according to the present invention, when a simple peer requests access for a real time internet broadcasting service, the simple peer is initially added to the real time internet broadcasting service system. Simple Peer can be added to a group to watch live internet broadcasts in various cases as follows.

① When added to GM peer and using real-time internet broadcasting service

② Added to LM peer group to use real-time internet broadcasting service

③ When the LM peer group is added after using the real-time internet broadcasting service

④ added to child LM peer group and using real-time internet broadcasting service

⑤ When LM peer group is separated and added to use real-time internet broadcasting service

⑥ When a child LM peer group is separated and added to use a real-time internet broadcasting service

Referring to FIGS. 7A and 7B, a case in which a simple peer 500 requesting viewing of a real-time internet broadcast is added to a ① GM peer to use a real-time internet broadcast service will be described.

In step S710, the simple peer 500 requesting real-time Internet broadcast viewing requests the center peer 100 for path information of the GM peer 200, which is a CP peer supporting the channel.

In step S720, the simple peer 500 receives the path information of the GM peer 200 from the center peer 100, accesses the GM peer 200 supporting the corresponding channel by using the received path information, and accesses the corresponding GM. The peer 200 requests to add a peer to the channel group managed by the peer 200.

In step S730, the GM peer 200 receives a request for adding a peer from the simple peer 500, and searches whether there is a peer addition target group.

In step S740, if there is no target group to add a peer as a result of the search, the GM peer 200 sets the simple peer 500 that requested the peer addition as an LM peer. When the simple peer 500 requesting the peer addition is added directly to the GM peer 200 to become the LM peer of one group, the first request in the corresponding channel is the first addition. This may occur when a request is made or when there is a margin of bandwidth for transmitting broadcast data.

In step S750, the simple peer 500 selected as the LM peer updates the peer state information periodically or when a specific event occurs with the GM peer 200. In this case, when a specific event occurs, when a member's peer is added or removed, or when a member's simple peer forms a group and is separated from one group, or when another group's simple peer is merged into a member's peer It may be the case that an event occurs that changes the state of. The status information of the peer is reported to the LM peer of the group to which it belongs, and is finally reported to the GM peer 200 managing the LM peer and updated. The GM peer 200 may adjust server capacity and network bandwidth by periodically updating peer state information when a specific or specific event occurs.

Referring to FIGS. 8A and 8B, a case in which a simple peer 500 requesting to view a real-time internet broadcast is added to a ② LM peer group to use a real-time internet broadcast service will be described. Hereinafter, a description of the procedure overlapping with the procedure performed in FIGS. 7A and 7B will be omitted, and the procedure following the overlapping procedure will be described in detail below.

 In step S810, the GM peer 200 searches whether there is a corresponding channel group requested by the simple peer 500, and if there is a corresponding channel group, whether the LM peer of the group that can be added to the simple peer 500 exists. After retrieving, if there is an addable LM peer 212, the path information of the addable LM peer 212 is transmitted. The simple peer 500 receives the path information of the LM peer 212 of the addable group from the GM peer 200.

In step S820, the simple peer 500 requests the LM peer 212 to add a peer using the path information of the LM peer 212 of the addable group.

In step S830, the LM peer 212 receiving the request for adding a peer from the simple peer 500 determines whether the number of peers belonging to the corresponding group exceeds a preset threshold. Here, the preset threshold is a limit of the number of simple peers that can belong to the maximum of one group. The threshold value is preset according to the server capacity of GM peers and higher generation LM peers, the configuration depth of the simple peer, and the network bandwidth. Can be set.

In step S840, if it is determined that the number of peers belonging to the corresponding group does not exceed the preset threshold, the LM peer 212 returns the path information of the simple peer 214 that can be added in the group.

In step S850, the simple peer 500 requests the peer to add the peer to the simple peer 214 through the returned path.

In step S860, the simple peer 214 transmits a peer addition success response indicating that the peer has been added to the requested simple peer 500.

In step S870, the simple peer 214 having added the simple peer 500 has changed its peer state, and updates the peer state information to the LM peer 212 to which it belongs.

9A and 9B, a case in which a simple peer 500 requesting to view a real-time internet broadcast is added after a ③ LM peer group is separated and uses a real-time internet broadcast service will be described. Hereinafter, a description of a procedure overlapping with the procedure performed in FIGS. 7A to 8A will be omitted, and a procedure following the overlapping procedure will be described in detail below.

In step S910, when it is determined that the number of peers belonging to the corresponding group exceeds a preset threshold, the LM peer 212 searches whether there is a child LM peer belonging to the corresponding LM peer 212.

In step S920, as a result of the search, the corresponding LM peer 212 determines that the number of peers belonging to the corresponding group exceeds a preset threshold, and if there is no child LM peer belonging to the corresponding LM peer 212, One of the simple peers 214 belonging to the LM peer 212 is selected as a new LM peer and separated from the group of the corresponding LM peer 212 into a new group.

In step S930, the new LM peer 214 requests to register as a new LM peer GM peer 200 which is a CP server of the channel.

In step S940, the simple peer 500 requesting the peer addition receives the path information of the newly selected child LM peer 214 from the corresponding LM peer 212.

In step S950, the simple peer 500 that has requested a peer addition requests the simple peer addition to the child LM peer 214.

In step S960, the child LM peer 214 transmits a peer addition success reply notifying that the simple request 500 has added the peer.

In step S970, the child LM peer 214 has updated its peer state information to the LM peer 212 to which the child LM peer 214 has changed.

10A and 10B, a case in which a simple peer 500 requesting to view a real-time internet broadcast is added to a ④ child LM peer group to use a real-time internet broadcast service will be described. Hereinafter, a description of a procedure overlapping with the procedure performed in FIGS. 7A to 9A will be omitted, and a procedure following the overlapping procedure will be described in detail below.

In step S1010, if the number of peers belonging to the corresponding group exceeds the preset threshold, the corresponding LM peer 212 has a child LM peer 214 belonging to the corresponding LM peer 212, the child LM Inquire to peer 214 if a peer addition is possible.

In step S1020, the child LM peer 214 receives a peer addition query and determines whether the number of simple peers to which it belongs exceeds a preset threshold.

In step S1030, if the number of simple peers belonging to the child LM peer 214 does not exceed the preset threshold, the child LM peer 214 returns that it is possible to add to the LM peer 212, and the corresponding LM The peer 212 returns the route information of the child LM peer that can be added to the simple peer 500 that requested the addition.

In step S1040, the simple peer 500 makes a request for adding a peer to the child LM peer 214.

In step S1050, the child LM peer 214 returns the path information of the simple peer 216 that can be added among the simple peers belonging to the child LM peer 214 to the simple peer 500 that requested the addition.

In step S1060, the simple peer 500 makes a request for adding a peer to the simple peer 216 that can be added.

In step S1070, the simple peer 216 to which the simple peer 500 has been added transmits a peer addition success reply indicating that the simple peer 500 has been added to the simple peer 500.

In step S1080, the added simple peer 216 has changed its peer state, and updates the peer state information to the child LM peer 214 to which it belongs.

Referring to FIGS. 11A and 11B, a case where the simple peer 500 requesting viewing of the real-time Internet broadcast is added to the 5 LM peer group again and added to use the real-time Internet broadcast service will be described. Hereinafter, a description of the procedure overlapping with the procedure performed in FIGS. 7A to 10A will be omitted, and the procedure after the overlapping procedure will be described in detail below.

In step S1110, the child LM peer 214 receives a peer add query, and if the number of simple peers to which it belongs exceeds the preset threshold, the child LM peer 214 is unable to add a peer to the LM peer 212. Reply

In step S1120, the parent LM peer 212 searches for a simple peer to which it belongs.

In step S1130, when the parent LM peer 212 is found that there is a simple peer belonging to it, one of the simple peers belonging to the parent LM peer 212 is selected as a new child LM peer 216 and separated into a new group.

In step S1140, the new child LM peer 216 requests the GM peer 200, which is the CP server of the corresponding channel, to register as a new LM peer 216.

In step S1150, the simple peer 500 requesting the peer addition receives the path information of the newly selected child LM peer 216 from the parent LM peer 212.

In step S1160, the simple peer 500 that requested the peer addition requests the simple peer addition to the child LM peer 216.

In step S1170, the child LM peer 216 transmits a peer addition success reply notifying that the simple peer 500 that requested the addition has been added.

In operation S1180, since the peer LM peer 216 has changed its peer state, the child LM peer 216 updates the peer state information to the affiliated LM peer 212.

12A and 12B, a case in which a simple peer 500 requesting to view a real-time Internet broadcast is used to detach and add a 6 child LM peer group to use a real-time Internet broadcast service will be described. Hereinafter, a description of a procedure overlapping with the procedure performed in FIGS. 7A to 11A will be omitted, and a procedure following the overlapping procedure will be described in detail below.

In step S1210, the child LM peer 214 returns to the LM peer 212 that it is impossible to add a peer, and then if there is no simple peer belonging to the LM peer 212, one of the child LM peers 214, 216. One of the child LM peers 216 is selected so that the group of s is separated, and the path information is returned to the simple peer 500.

In step S1220, the selected child LM peer 216 selects one of the belonging simple peers 218 as the grandchild LM peer and separates it into a new group.

In step S1230, the new grandchild LM peer 218 requests the GM peer 200 which is a CP server of the corresponding channel to register as a new LM peer 218.

In step S1240, the simple peer 500 requesting the peer addition receives the path information of the newly selected grandchild LM peer 218 from the LM peer 212.

In step S1250, the simple peer 500 that requested the peer addition requests the simple peer addition to the grandchild LM peer 218.

In step S1260, the grandchild LM peer 218 transmits a peer addition success reply that informs the simple peer 500 that requested the addition of the peer.

In step S1270, since the grandchild LM peer 218 has changed its peer state, the grandchild LM peer 218 updates the peer state information to the child LM peer 216 to which it belongs.

13A to 17B are diagrams for describing a group leaving method in a group management method of a real-time internet broadcasting service system according to an embodiment of the present invention.

When the simple peer 500 finishes watching the real-time internet broadcast in the real-time internet broadcast service system according to the present invention, the simple peer 500 is withdrawn from the real-time internet broadcast service system. When a simple peer is withdrawn to a real-time internet broadcasting service system, it can be largely withdrawn in various cases as follows, and after withdrawal, groups can be merged.

① When simple peer is withdrawn normally

② If a simple peer is withdrawn abnormally

③ When simple peer is withdrawn and group is merged

④ When LM peer is withdrawn normally

⑤ When LM peer is abnormally withdrawn

Referring to FIGS. 13A and 13B, a case in which the simple peer 500 that finishes watching a real-time Internet broadcast is ① normally withdrawn will be described.

In step S1310, the simple peer 500 that finishes watching the real-time Internet broadcast first notifies the child peers 214 and 216 of leaving the group.

In step S1320, the simple peer 500 that finishes watching the real-time Internet broadcast notifies the LM peer 212 managing the group to which the group belongs, to leave the group.

In step S1330, the simple peer 500 terminates viewing of the real-time Internet broadcast and normally withdraws from the group.

In operation S1340, the child peers 214 and 216 of the simple peer 500 request a peer addition to the LM peer 212 of the group to which the simple peer 500 performs a peer addition process.

Referring to FIGS. 14A and 14B, a case in which the simple peer 500 terminates viewing of a real-time Internet broadcast is ① abnormally withdrawn.

In step S1410, the simple peer 500 that terminates viewing of the real-time Internet broadcast exits abnormally without notifying the child peers 214 and 216 or the LM peer 212 managing the group to which the group belongs.

In operation S1420, the child peers 214 and 216 of the simple peer 500 detect an abnormality in the connection state with the simple peer 500 withdrawn.

In operation S1430, the LM peer 212 managing the group to which the group belongs is detected whether there is an error in the connection state with the simple peer 500, and the state information is updated.

In operation S1440, the child peers 214 and 216 of the simple peer 500 request a peer addition to the LM peer 212 of the group to which the simple peer 500 performs a peer addition process.

Referring to FIGS. 15A and 15B, a case in which a simple peer 500 terminates viewing of a real-time Internet broadcast is withdrawn and a group is merged will be described.

In step S1510, the simple peer 500 that finishes watching the real-time Internet broadcast notifies the LM peer 212 managing the group to leave the group.

In step S1520, when the number of peers of the group to which the group belongs is small, the LM peer 212 managing the group requests a group merging to the parent LM peer 210 managing the parent group.

In step S1530, the parent LM peer 210 managing the parent group performs a process of merging the groups if the group merging is possible compared to a preset threshold.

Referring to FIGS. 16A and 16B, a case in which the LM peer 500 terminates viewing of a real-time Internet broadcast is ① normally withdrawn.

In step S1610, the LM peer 500 that finishes watching the real-time Internet broadcast selects a new LM peer 212 to replace itself from the child peers to which it belongs and notifies the new LM peer 212 of the withdrawal.

In step S1620, the LM peer 500 notifies the child peer 214 of the withdrawal and delivers the route information of the new LM peer 212.

In step S1630, the LM peer 500 notifies the parent LM peer 210 of the parent group of the withdrawal and delivers the path information of the new LM peer 212.

In step S1640, the parent LM peer 210 temporarily allocates the bandwidth of the withdrawn LM peer 500 to the new LM peer 212.

In step S1650, the child peer 214 of the LM peer 500 is added to the group again by requesting a new LM peer 212 to add a peer.

In step S1660, the new LM peer 212 requests the parent LM peer 200 of the parent group of the withdrawn LM peer 500 to add as a child LM peer.

In step S1670, the new LM peer 212 updates the peer state information.

Referring to FIGS. 17A and 17B, a case in which the LM peer 500 terminates viewing of a real-time Internet broadcast is ① abnormally withdrawn.

In step S1710, the LM peer 500 which terminates viewing of the real-time internet broadcast exits abnormally without notification of withdrawal.

In step S1720, the LM peer 212 belonging to the withdrawn LM peer 500 detects an abnormality in the connection state with the withdrawn LM peer 500.

In step S1730, the LM peer 212 belonging to the withdrawn LM peer 500 requests and is added to the parent LM peer 210 of the withdrawn LM peer 500 as a child LM peer.

 In step S1740, the LM peer 212 belonging to the withdrawn LM peer 500 updates the peer state information to the GM peer 200 which is a CP server.

In step S1750, the simple peer 214 belonging to the withdrawn LM peer 500 detects an abnormality in the connection state with the withdrawn LM peer 500.

In step S1760, the simple peer 214 belonging to the withdrawn LM peer 500 requests the parent LM peer 210 of the withdrawn LM peer 500 to add as a child LM peer and is added to the group again.

In step S1770, the parent LM peer 210 detects the abnormality in the connection state with the withdrawn LM peer 500.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form.

As described above, the present invention has an effect of providing a P2P-based real-time Internet broadcasting service efficiently and lightly by managing a plurality of clients in groups.

In addition, the present invention has the effect of providing a P2P-based real-time Internet broadcast service that can provide an Internet broadcast service without modification of a conventional network hardware router.

In addition, the present invention manages a plurality of clients in a group and provides Internet broadcasting in a P2P manner, thereby providing a real-time Internet broadcasting service to a plurality of clients with a relatively inexpensive server investment compared to a client server method.

In the above described in detail through an embodiment of the knowledge management system according to the present invention, the content is not limited to the field of the invention described in the claims below. In addition, in the art, it will be apparent to those skilled in the art that various changes or modifications are made within the scope of the present invention.

Claims (20)

In the system to service real-time Internet broadcasting in a peer to peer (Peer to Peer) method, A Group Master peer which is a broadcast server receiving broadcast content from a broadcaster and transmitting corresponding broadcast data; And A local master peer managed by the group master peer and transmitting the received broadcast data to one or more simple peers dependently coupled in a peer-to-peer manner; The group master peer receives peer state information periodically or when a specific event occurs from a simple peer belonging to a lower layer, and controls whether to provide broadcast data according to peer state information. The local master peer is a simple peer of the highest layer among a plurality of simple peers that are included in the same group and are hierarchized in a tree structure and deliver broadcast data in a peer-to-peer manner. Real-time Internet broadcasting service system, characterized in that the generated, separated or merged. The method of claim 1, The local master peer of another group is coupled to the local master peer as a simple peer of a lower layer. delete The method of claim 1, The number of peers belonging to the group is controlled by any one or more of server capacity of the group master peer, a group tree structure depth to which the group belongs, and a network bandwidth providing broadcast data. system. The method of claim 1, And a center peer for providing address information of the group master peer to the simple peer connecting to the internet broadcast service. The method of claim 1, The peer belonging to the group has a binary tree structure. A method in which a group master peer of a real time internet broadcasting service system manages a real time internet broadcasting service. Receiving a connection request from an additional simple peer requesting a real-time Internet broadcast service; Returning route information of an upper layer peer in response to the connection request, wherein the upper layer peer is a simple peer or a local master peer accessible in accordance with the connection request; And Receiving peer state update information from the higher layer peer when the additional simple peer accesses the higher layer peer using the path information; The real-time Internet broadcast service system receives broadcast data from the group master peer and the group master peer, which are broadcast servers receiving and providing broadcast contents from broadcasters, to simple peers managed in group units in a tree structure. And a local master peer for providing broadcast data in a peer-to-peer manner. The method of claim 7, wherein Receiving a connection request from the additional simple peer Receiving, from a center peer, path information of the group master peer for providing an Internet broadcast service of a channel requested by the additional simple peer; And And requesting, by the additional simple peer, to connect to the group master peer by using the route information. The method of claim 7, wherein In response to the access request, returning the path information of the higher layer peer may include If the upper layer peer is the simple peer, determining whether the number of peers belonging to the local master peer to which the simple peer belongs exceeds a preset threshold; And And returning the path information of the simple peer to the additional simple peer when the determination result does not exceed a preset threshold. The method of claim 7, wherein In response to the access request, returning the path information of the higher layer peer may include If the upper layer peer is the simple peer, determining whether the number of peers belonging to the local master peer to which the simple peer belongs exceeds a preset threshold; And As a result of the determination, when the preset threshold is exceeded, the simple peer is selected as a new child local master peer and separated from the group managed by the local master peer, and the path information of the new child local master peer is added to the additional simple peer. And responding to the real-time Internet broadcast service management method. The method of claim 7, wherein In response to the access request, returning the path information of the higher layer peer may include If the upper layer peer is the local master peer, determining whether the number of peers belonging to the local master exceeds a threshold; And And returning the path information of the local master peer to the additional simple peer when the threshold value is not exceeded as a result of the determination. The method of claim 7, wherein In response to the connection request, returning the peer's path information may include If the upper layer peer is the local master peer, determining if the number of peers belonging to the local master peer exceeds a threshold; And As a result of the determination, when a preset threshold is exceeded, a child simple peer belonging to the local master peer is selected as a new child local master peer and separated from a group managed by the local master peer, And returning route information to the additional simple peer. The method according to any one of claims 9 to 12, The preset threshold is A real time internet broadcasting service configured to limit the number of peers belonging to the group according to a server capacity of the group master peer, a depth of the tree structure of the group, and a network bandwidth providing the internet broadcasting How to manage. The method according to any one of claims 9 to 12, Peers belonging to the group are connected in a binary tree structure. A method in which a group master peer of a real time internet broadcasting service system manages a real time internet broadcasting service. The leaving peer disconnects the connection for terminating the real-time Internet broadcast viewing; And Requesting a connection from a child peer belonging to the withdrawal peer to a local master peer to which the withdrawal peer belongs; The real-time Internet broadcast service system receives broadcast data from the group master peer and the group master peer, which are broadcast servers receiving and providing broadcast contents from broadcasters, to simple peers managed in group units in a tree structure. And a local master peer for providing broadcast data in a peer-to-peer manner. The method of claim 15, Before the withdrawing peer leaves the connection to terminate watching the real-time Internet broadcast. And notifying a child group with which the withdrawal peer belongs and a local master peer of the group to which the withdrawal peer belongs. The method of claim 16, If the withdrawal peer is a local master peer, selecting one of the child peers as a new local master peer and notifying the withdrawn child peer and the local master peer of the withdrawal; The local master peer temporarily allocating a bandwidth allocated for transmitting real-time Internet broadcast data to the withdrawn local master peer to the new local master peer; And And accessing, by the associated child peer, the new local master peer. The method of claim 15, Requesting a connection from a child peer belonging to the withdrawal peer to a local master peer to which the withdrawal peer belongs Detecting, by a child peer belonging to the withdrawn peer, an abnormal state of a connection with the withdrawn peer; And And requesting access from a local master peer to which the withdrawal peer belongs by the child peer detecting the abnormal state of the connection. A recording medium readable by an electronic device on which a program consisting of typed instructions for executing a method of managing a real-time Internet broadcasting service by a group master peer of a real-time Internet broadcasting service system, comprising: The leaving peer disconnects the connection for terminating the real-time Internet broadcast viewing; And Requesting a connection from a child peer belonging to the withdrawal peer to a local master peer to which the withdrawal peer belongs; The real-time Internet broadcast service system receives broadcast data from the group master peer and the group master peer, which are broadcast servers receiving and providing broadcast contents from broadcasters, to simple peers managed in group units in a tree structure. And a local master peer for providing broadcast data in a peer-to-peer manner. A recording medium readable by an electronic device on which a program consisting of typed instructions for executing a method of managing a real-time Internet broadcasting service by a group master peer of a real-time Internet broadcasting service system, comprising: The leaving peer disconnects the connection for terminating the real-time Internet broadcast viewing; And Requesting a connection from a child peer belonging to the withdrawal peer to a local master peer to which the withdrawal peer belongs; The real-time Internet broadcast service system receives broadcast data from the group master peer and the group master peer, which are broadcast servers receiving and providing broadcast contents from broadcasters, to simple peers managed in group units in a tree structure. And a local master peer for providing broadcast data in a peer-to-peer manner.

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