Manageable P2P (Peer-to-Peer) streaming media live broadcasting system based on IMS (IP Multimedia Subsystem) in NGN (Next Generation Network) and realization method thereof

Abstract

The invention relates to a manageable P2P (Peer-to-Peer) streaming media live broadcasting system based on an IMS (IP Multimedia Subsystem) in an NGN (Next Generation Network) and a realization method thereof. The system provided by the invention expands an overlay network management function entity and a network resource inquiry function entity on a streaming media service layer. The method provided by the invention comprises the following steps: using user terminal equipment capable of carrying out P2P as a calling request to establish a streaming media live broadcasting session; utilizing a streaming media service control function entity as a back-to-back user agent to select a content transmitter for calling user terminal equipment and establish a media transmission session with the content transmitter; utilizing the user terminal equipment capable of carrying out P2P to carry out a channel switching request updating session; and utilizing the streaming media service control function entity to select the content transmitter of a new channel for the user terminal equipment capable of carrying out P2P and establish the media transmission session with the content transmitter of the new channel. According to the invention, the centralized management of a P2P overlay network is realized; the problem of inconformity in a P2P distribution network and a physical network is solved; and simultaneously, the QoS (Quality of Service) of P2P media transmission is ensured by utilizing the SIP/SDP (session initiation protocol/session description protocol) session consultation mechanism in the IMS and the network control and resource reservation provided by the NGN.

Description

technical field [0001] The invention relates to the field of streaming media technology and IP communication, in particular to an IMS-based manageable P2P streaming media live broadcast system in NGN and its realization method. Background technique [0002] In recent years, with the rapid development of computer technology and multimedia technology and the popularization of broadband networks, streaming media applications based on IP networks have developed rapidly, such as IPTV (Internet Protocol Television, Internet Protocol-based TV, that is, Internet TV) , Video on Demand, Live Online, Video Surveillance, Internet Radio, Mobile TV, Distance Education, etc. Streaming media live streaming is a very important form of business expression in both the IPTV business developed by telecom operators and the online Internet TV (Internet TV) business provided by Internet Service Providers (ISPs). The development of live streaming media on the Internet is relatively mature, and its ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art that IP multicast cannot adapt to the deployment of live streaming services for flexible distributed users and the uncontrollable and unmanageable P2P network, the technical problem to be solved by the present invention is to provide a method that can overcome the existing With the limitations of IP-based mult...

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