On the technology of P2P
Existing operating platform digital media can no longer effectively support the rapid development of digital media applications. To P2P technology-based broadband Internet applications has now become a "killer app." As a result of P2P technology for streaming media content distribution, the system requirements on the server side is relatively low. However, due to lack of the necessary control mechanism, leading to business is not managed, quality of service can not be guaranteed, and therefore hinder the application of P2P technology and media industries. Present, C / S architecture and P2P media services architecture is developed independently along two paths, some of the difficulties encountered in the development of all, if the two combined will create a new situation of media services. Based on P2P technology, media telecommunications network (MTN) is to develop this idea came. 1 MTN Introduction Based on P2P technology, MTN is a kind of P2P technology as the main means of media delivery methods and networking, to PC as the main terminal form, in order to live, on-demand as the main forms of business-oriented broadband users can be built to operate management of new video media network. It is in the fixed network operators to integrated information provider in the process of transition, made a new video solution, it inherited a low-cost P2P technology, the advantages of strong expansion, and the nearest service area CDN technology strengths, and successfully resolved the Internet P2P video network operation and management of performance in a major loss of function, was considered a new generation of mainstream broadband video solutions. 1.1MTN network A complete MTN network shown in Figure 1 can be divided into 4 layers, divided into operational layers, P2P management, the media layer and bearer layer, between layers of independent functional, but with each other through specific interface interaction. Each layer contains multiple devices or systems, which together required to complete this level all the features.Operators have a business presentation layer, operations management, media processing, business applications, terminal management, content library, operator back support and other functions. P2P management with hybrid P2P architecture P2P central management server features, including node management and resource management scheduling. Media layer of the P2P nodes, including the media object the user terminal, using the media object and the user terminal operators to deploy specialized media servers. P2P management and the media layer is composed of MTN in the P2P network. Bearing layer includes the user"s network access Access equipment , MAN and the Internet backbone for Metro, that IP bearer network, which is the basis for the normal operation of MTN. Relative to the operating level, P2P management and the media layer, the bearer network is "transparent", but the P2P management system can be carried by the user terminal Access equipment Information Awareness IP bearer network of network topology information, make the appropriate allocation. In MTN"s operations, and business models related to the operating strategy was refined as operational, the implementation of specific business processes, and only layer of review by the operator can release the contents of the final provision of services in P2P networks, and ensure the integrity of the content and effectiveness. Meanwhile, operations management layer also serves as the core of MTN, the definition of P2P mechanism and storing a variety of business strategies required to run, including media handling strategy, node management district"s allocation strategy, the source of query strategy, candidate source selection strategy, P2P transfer control strategies. Operational level strategy to define the ultimate distribution to the P2P and media management layer for their business processes related to the execution time of P2P use.