发表时间:2014-09-02 阅读次数:981次

Video (Monitoring) Service on Campus Oriented to the Future Media Network


Basic Principle  


As the explosive growth of the data in the future media network, it would not satisfy the need if we simply moved the data. Therefore, the information transmission of the next generation media network is based on the transmitted content, providing users with all kinds of services and business. The corresponding block diagram is shown below.

  

  

Compared with traditional communication process, the parsing process of the distributed services relies on the communication of Data and Interest. Any node having received the Interest would return Data if it contains the corresponding Data. Whether the Data will be returned depends only on the Interest. Due to the Data and Interest exchanging data according to names, several nodes interested in the same Data could get the Data via multicast, which can promote the communication efficiency of the network. The names of the Data are composed of non-transparent, binary modules, and they form typical hierarchical structure. So it is convenient to know if the Data matches the Interest. The IP network resolves the problem of the hierarchical structure among < network, subnet, host> using the same method as described above. It is efficient in practical use, convenient for the network integration and quick search of routing.

  

  

The node architecture is shown above. A node comprises of three parts, Content Store (CS), Pending Interest Table (PIT), and Forwarding Information Base (FIB). Typical node interfaces include the wireless interface, the wired interface and the application interface. When a Data arrived at a communication interface, the successive operation on it will be decided by the result of Longest Prefix Match Algorithm

  

Pattern of Video Monitoring Services Delivery  
The picture below describes the basic pattern of the video monitoring services delivery under complementary mixed architecture. It circumscribes service areas from system architecture angle and optimize limited resource condition based on the service demand.

  

It can be seen in the picture that the main feature of complementary mixed architecture is that a regional management server is created dynamically according to the service condition of the campus network. Routing between video monitoring services of different areas is managed by the resource management servers and, furthermore, store, manage and distribute the video service content, which is similar to the CDN of hierarchical network structure. Due to the dynamic network building, unreliable link and changing in parameters, regional servers can be created dynamically and their content update is managed by resource management servers.

In the regional management area, nodes can request the CDN service of hierarchical network architecture, provide the users with all kinds of video monitoring service by P2P and support content research, content management, smart delivery and user management at the same time. Thus, the network architecture can satisfy the elasticity and scalability demand of the video service when “autonomy” area is formed dynamically.

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