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A Streaming Media Transmission Scheme Based on Application Layer Multicast Algorithm

A technology of streaming media transmission and application layer, which is applied in the direction of transmission system, digital transmission system, branch office to provide special services, etc., and can solve the problems of increasing transmission delay between nodes and link load, etc.

Inactive Publication Date: 2012-02-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although application layer multicast solves some problems existing in IP multicast, compared with IP multicast, ALM increases the transmission delay and link load between nodes, which has certain advantages for applications with high real-time requirements or heavy traffic load. restrictive

Method used

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  • A Streaming Media Transmission Scheme Based on Application Layer Multicast Algorithm
  • A Streaming Media Transmission Scheme Based on Application Layer Multicast Algorithm
  • A Streaming Media Transmission Scheme Based on Application Layer Multicast Algorithm

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Embodiment Construction

[0047] The solution can be divided into five parts: IP multicast detection module, networking algorithm module, communication module, audio and video data transmission, and node information management module.

[0048] IP multicast detection

[0049] IP multicast detection is to make full use of IP multicast islands. Because IP multicast can effectively save bandwidth, we divide all nodes in an IP multicast domain into an independent autonomous domain, and select a representative node R (generally the node that joined the group first) to participate in the construction of the overlay network , that is to say, the entire autonomous domain is regarded as a node in the overlay network. All nodes in the autonomous domain use multicast to transmit data in the domain, and the data sent to other nodes outside the domain is first transmitted to R and then forwarded by R. The data sent from outside the domain to the nodes in the domain is also forwarded by R. In order to prevent tran...

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PUM

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Abstract

The present invention designs and implements a scheme for constructing an overlay network for streaming media transmission by combining IP layer and application layer multicast technology. The core idea of ​​the solution is: use IP multicast and overlay network technology, use application layer multicast algorithm to establish an overlay network, provide an efficient transmission platform for streaming media data, support each networking node to subscribe to audio and video streams, and support multiple Switching of various networking algorithms and algorithm extension. The main content of the scheme includes: (1) Detecting IP multicast islands, all users in an IP multicast domain appear as one user externally, and use IP multicast internally to transmit data to each other. (2) Run the application layer multicast algorithm to establish an overlay network. (3) Transmit streaming media data on the overlay network, and support nodes to subscribe to audio and video data. (4) It can run different multicast protocols (such as Narada, Yoid, HMTP algorithms), support the switching of different protocols, and provide interfaces for adding new algorithms. This solution can effectively save network resources and reduce transmission delay, and the end-to-end structure reduces the possibility of single point failure. Suitable for streaming media applications such as video conferencing.

Description

technical field [0001] The invention belongs to the field of computer multimedia technology, and relates to application layer multicast algorithm, overlay network technology, streaming media transmission technology and the like. Background technique [0002] With the development of network and multimedia technology, traditional web browsing, email and other services can no longer meet people's growing interactive needs, and the application of streaming media has gradually become the focus of attention. Such as multimedia news release, online live broadcast, online video advertisement, e-commerce, video on demand, distance education, Internet radio, real-time video conferencing, etc. For such high-bandwidth streaming media applications, the main goal of such systems is to provide more users with reliable high-quality multimedia audio and video interactive services using limited resources. One of the key issues to achieve this goal is how to effectively transmit streaming med...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/18H04L29/06H04L12/56H04L45/16
Inventor 梁苑单宝松李未楼奕华刘祥龙
Owner BEIHANG UNIV