analysis- p2p iptv technology evolution and progress（分析- p2p iptv技术发展和进步）.doc

Analysis: P2P IPTV technology evolution and progress (Research papers Download News) 1.IPTV uses a client / server model limitations IPTV generally refers to an IP network transmission of audio and video content and watch with the TV business. Currently telecom operators to provide IPTV services in support of multicast IP network can be managed, and its main business is broadcast television (broadcast television), when shifted TV, video on demand (VoD) and interactive information services. Currently, China’s IPTV system uses a client / server model to provide unicast and on-demand (including VoD and time-shifted television) services. Because the server Input / Output (I / O) “bottleneck” constraints, a single server can support only a limited concurrent streams (one thousand magnitude of concurrent streams) To resolve thousands, millions of users to simultaneously watch the problem, not only requires a lot of servers, you also need a very wide network bandwidth current workaround First, using multicast to provide broadcast, two is the use of content delivery network (CDN) technology into the server as a place closer to our customers in order to reduce network load. existing network to support multicast, the need for reform, which will not only result in increased costs loss omnipresent ability to access the Internet. Therefore, IPTV only be used in the transformation of the local network providing a broadcast service for IPTV further evolutionary trend of new media, the current client / server model is not well supported. Client / server development of IPTV has become a constraining “bottleneck”, the solution is to connect to the peer architecture (P2P) schema evolution. 2. P2P content distribution technology evolution Development of computer network evolution constantly swinging between concentration and distribution of early computer use pattern is one of many users to share large computer, after the development of the personal computer, from cen