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Superposition network and building method thereof

A technology of overlapping networks and construction methods, applied in the field of network communication, can solve problems such as slowness, and achieve the effect of improving scalability, speeding up, and shortening startup delay

Inactive Publication Date: 2009-03-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this optimization selection mechanism can improve the receiving quality to a certain extent, it will periodically introduce control overhead, and is limited by the characteristics of the SCAM protocol itself. Since node information is forwarded and maintained according to probability, it is difficult to find nodes with better transmission performance. process is slow

Method used

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  • Superposition network and building method thereof
  • Superposition network and building method thereof
  • Superposition network and building method thereof

Examples

Experimental program
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Embodiment 1

[0045] The embodiment of the present invention provides a method for constructing an overlapping network for a multi-source peer-to-peer network streaming media live broadcast system, including:

[0046] Create a rebroadcast node list for each live channel, and maintain part of the peer node information corresponding to the live channel in the rebroadcast node list; create a distributed hash table ring for each live channel, and pass The distributed pointer table of each peer node maintains all peer node information corresponding to the live channel.

[0047] In the overlapping network construction method, the mechanism for maintaining and discovering peer node information can be based on a network architecture that combines a directory server and a DHT (Distributed Hash Table, Distributed Hash Table) ring. Under this architecture, peer node information adopts a mixed maintenance mode, which includes centralized maintenance of some preferred peer node information on the direct...

Embodiment 2

[0090] An embodiment of the present invention provides a method for discovering peer nodes in an overlay network, including:

[0091] A new user node who wishes to receive data of a certain channel searches the relay node list for the peer node information corresponding to the channel;

[0092] The new user node receives the preferred peer node information in the rebroadcast node list corresponding to the channel selected according to the measurement parameters, and after performing performance detection on the preferred node, takes the preferred peer node as an alternative parent node;

[0093] According to the multi-parameter parent node selection strategy, the new user node selects the minimum number of preferred peer nodes that meet the system performance requirements as the parent node from the candidate parent nodes, and initiates transmission requests for different data blocks to the parent nodes.

[0094] see Figure 8 , the specific implementation steps of a method f...

Embodiment 3

[0127] see Figure 10 , this embodiment provides an overlay network, including a directory server 401, a streaming media server 402 and a user node 403, wherein:

[0128] The directory server 401 is configured to create a rebroadcast node list for each live channel, and maintain part of the peer node information corresponding to the live channel in the rebroadcast node list.

[0129] The streaming media server 402 is used to form a distributed hash table ring with the user node 403, wherein each live channel corresponds to a distributed hash table ring, and all peers corresponding to the live channel are maintained on the distributed hash table ring. Node information, each peer node on the distributed hash table ring realizes the maintenance of peer node information through the distributed pointer table.

[0130] The user node 403 is used to form a distributed hash table ring with the streaming media server 402, wherein each live channel corresponds to a distributed hash tabl...

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Abstract

The invention discloses an overlay network and a construction method thereof, and a peer node discovery method and user nodes, which pertain to the network communication field, wherein, the construction method comprises the steps that: a rebroadcast node list is created for each live broadcast channel, a distributed hash table ring is created for each live broadcast channel. The discovery method comprises the steps that: peer node information corresponding to the channel is searched in the rebroadcast node list; performance detection is carried out to optimal nodes and the optimal peer nodes are taken as the candidate father nodes; the minimum amount of optimal peer nodes meeting the system performance requirements are taken as the father nodes, transmission requests for different block data are respectively initiated to the father nodes. The overlay network comprises a list server, a streaming server and user nodes. The user node comprises a peer node searching module, a candidate father node storage module and a father node selection module. By adopting the technical proposal, the invention has better transmission performance in the start-up initial stage, is convenient for being expanded and can raise the peer node discovery speed.

Description

technical field [0001] The invention relates to the field of network communication, in particular to an overlay network suitable for a multi-source peer-to-peer network streaming media live broadcast system and a construction method thereof, a method for discovering peer nodes in the overlay network and user nodes in the overlay network. Background technique [0002] With the widespread popularization of the Internet and the continuous maturity of multimedia technology, how to provide high-quality live streaming services to large-scale concurrent user groups on the Internet has become a key application to promote the development of the Internet. In recent years, researchers have proposed a live streaming system based on peer-to-peer network technology (P2P, Peer-to-Peer). Its basic idea is to transfer the data routing, replication, forwarding and other functions related to IP multicast to the application layer (instead of routers) of member hosts (user nodes) to implement, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L29/08H04L12/56
Inventor 刘梦娟刘芳林洪佩琳胡新宇
Owner HUAWEI TECH CO LTD
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