Partially prestored harmonic data broadcasting scheme for popular videos

The harmonic data broadcasting scheme provide the best user latency. However, it has a drawback of not providing the video data always in time to view. This drawback has been overcome in some schemes. These schemes share common organizational structure to the harmonic scheme and hence may be called its variants. The main variants include cautious, quasi-harmonic, and polyharmonic schemes. The polyharmonic scheme has better performance for user latency in comparison to the cautious and quasi-harmonic schemes. But this scheme works by constraining a user for a fixed delay after receiving his/her request. During that delay period, some appropriate portion of the video data is stored in the buffer storage at the client´s site and it can be read from the buffer, whenever it is needed. In the polyharmonic scheme, two main parameters constrain its practicability. First, it needs the videos to be divided into the large number of subsegments that increases complexity of management. Second, it requires huge amount of storage space at the client´s site, increasing thus the cost of the end system. In this paper, the partially prestored harmonic scheme has been proposed, which requires less storage space than the polyharmonic scheme without affecting the user´s waiting time. Further, the number of subsegments of the video is considerably less, while maintaining the same user latency.