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Expandable island type multicast transmission system suitable for IPTV stream medium business

A technology of multicast transmission and streaming media, which is applied in transmission systems, digital transmission systems, devices that provide special services in branches, etc. It can solve the problems of IP multicast without considering the network layer and routers without multicast function, and achieve good expansion. performance, low latency, and guaranteed quality of service

Inactive Publication Date: 2009-05-20
SUN YAT SEN UNIV +1
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AI Technical Summary

Problems solved by technology

[0003] In the past, most of the protocols based on the application layer (such as Narada, NICE, DT, Scribe, ALMI, etc.) assumed that the router had no multicast function, so IP multicast at the network layer was not considered

Method used

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  • Expandable island type multicast transmission system suitable for IPTV stream medium business
  • Expandable island type multicast transmission system suitable for IPTV stream medium business
  • Expandable island type multicast transmission system suitable for IPTV stream medium business

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] The SIM network topology diagram is as follows figure 1 shown. In the SIM, the hosts in the island perform communication transmission through IP multicast mode, and the hosts between islands perform communication transmission through unicast mode. Each host to be connected to the system will first be added to the SIM tree structure, which is used to monitor and maintain the added hosts; then the host will join the multicast island through detection, and then complete the entire access process. Each island in the SIM has only a unique entry node, the entry node receives data packets sent by other islands, and then transmits these data packets within the island in a multicast manner.

[0039] Such as figure 1 , where the following objects exist:

[0040] (1) Multicast Island

[0041] The multicast island is self-organized into an island structure by a local n...

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PUM

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Abstract

The invention provides a scalable island multicast system (SIM) suitable for IPTV streaming media service. The system comprises an SIM server, an authentication and authorization server, a client mainframe, an STUN server and an IP multicast route. The tree-type structure adopted by the system has low end-to-end delay and is easier to maintain. The system adopts a local IP multicast mode favorable for the multicast of a streaming media application layer, blends an application layer multicast protocol and peer-to-peer network technology, has high efficiency, high robustness, high practicability, deployability and maintainability and supports real-time television and interactive film in the IP network. Simultaneously, the invention provides a simple data distribution and transmission method which is easy to realize.

Description

technical field [0001] The invention belongs to the field of digital home network technology and streaming media technology, and in particular relates to an expandable island multicast transmission system suitable for IPTV streaming media services. Background technique [0002] P2P system construction usually adopts two structures, namely tree structure and Gossip network structure. Gossip mesh structure is to establish a mesh structure of hosts by using Gossip algorithm to exchange data with adjacent hosts. However, since the Gossip structure sends data to a host through multiple paths, the delay of the longest path determines that this structure will bring a higher playback delay; on the contrary, the tree structure introduces a lower end-to-end delay , and are easier to maintain. The tree structure distributes the data of the host by establishing multiple trees. Most of the current application layer multicast mode systems use this structure for data distribution, such a...

Claims

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Application Information

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IPC IPC(8): H04L12/18H04L12/56H04L29/06H04L29/08H04N21/254H04N21/63H04N21/6405
Inventor 罗笑南刘宁史卓叶梦金星陈双幸郑勤梁黄亮聪
Owner SUN YAT SEN UNIV
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