3G IMS video sharing service is introduced first in this paper.

This paper advances the concept of virtual video shared net platform(VVSNP),introduces in detail the model design and realization of VVSNP,and illustrates the concrete application of VVSNP by using some examples.

There are three kinds of Internet videos: video sharing, Video on Demand (VOD), and P2P streaming media.

It has been the biggest video sharing website and its programme on request has over 100 millon.

Some new applications of internet such as Video Sharing system adopt a traditional Client/Server structure, which can not meet people s growing demand.

This paper mainly analyzes the current state of dynamic spectrum allocation and spectrum sharing technologies, including contiguous and fragment DSA, underlay and overlay spectrum sharing, cognitive radio, and spectrum pooling, and with these technologies, the spectrum utilization rate can be improved efficiently.

Based on interference temperature model,the spectrum sharing problem is changed into a nonlinear power opti- mization problem.

This paper investigated the spectrum sharing based on price dynamics in cognitive radio networks in which one primary service provider sells idle spectrum at different price to secondary service providers,and secondary users dynamically adaped the requested spectrum size according to the received payoffs.