Content Delivery Technology Of IPTV

The Internet flux is enlarging, the network with management and the credibility, safety of the network system put forward a higher request. So, the management of the current website the contents of the necessity serve, besides which raise a website to expand the ability, the service ability become necessary. The CDN (the Contents Delivery Network) can resolve all these problems nicely; its substance is to carry out the network contents to visit nearby.The CDN is also called the Contents Delivery Network; it is the network intelligence that makes use of a high time to come efficiently and characteristically to deliver the contents needed for the customer. The CDN based on the IP network, provide the point to point services from the fourth layer to the seventh layer of the IP network, the CDN can provide a better service from optimizing the access service of users.The CDN can make duplicate of the contents to the edge of the network, make the distance of contents point and respond point go to minimum, shorten the time of response, and raise the bandwidth utilization; The CND can also analysis the response of the user's, adjusts the allotment of resources, utilization uses the resources.Besides which the ability is obvious to improve the network function, The CDN technique can also support the emergence of more new business. Along with the Internet development and application, currently, the IDC (the Internet Data Center) got a quick development. Among them, the numerical cinema is a typical model of IDC in the future application; it can use the IDC of the whole world, distributing the contents to the whole world directly and quickly, and take expenses in the same time. The core technique of the IDC is CDN. We can foresee, in the near future, A lot of numerical movie theater will appear , we are in the perfect sense of vision enjoy, we could not feel the ages that delivers through a network to flow medium has already come.At that time, the application of the network will enrich more, only distributing the contents that the customer need to be visit to leave a recent place of customer possibly that can raise the utilization of the network availably, providing a more high-quality service for the customer, these all provide infinite development space for the CDN. We can foresee that the CDN technique will develop along with network technical development, and become one part of the Internet and the NGN network.The CDN technique will load more balanced; it can put routing and cache technique together, use of the intelligence allotment technique, contents according to visit the location of the customer, according to the principle of visit nearby assign to several nodes. Because of the IPTV business has very high request to the IP network service quality, the CDN technique begin to apply in the IPTV network. This paper is analysis and introduction the applied in the IPTV of the CDN technique, and configuring the actual circumstance of technique and the Internet of CNC ChaoYang Branch, to re-designing the programming of IPTV, to make the IPTV network can provide for the most customer more perfect, superior quality of service.The CNC ChaoYang Branch take the network process for four years and the development is strong, having already become the network that the overlay scope is most wide, the network bandwidth is the biggest and the customer quantity is the most breadths, accompany with the development of broad band network, it has own development space immediately that the IPTV business of based on the IP network, this paper elaborated the present condition of the IPTV network of CNC ChaoYang Branch and the optimizing project of the IPTV network that based on the CDN technology.