Abstract
The main contradiction that limits the development of video services is its high-bandwidth, low-latency network requirements and the complex and variable core network environment and Best-Effort service model. In order to solve this problem, this paper proposes a tiered dynamic resource reservation algorithm for video services based on time slot and bandwidth reduction under SDN core network framework. The algorithm introduces a grading policy on the basis of the bandwidth-reducing dynamic resource reservation algorithm, and adopts bandwidth reduction when the bandwidth requirement of the video service cannot be satisfied. At the same time, the bandwidth is reserved for high-priority conference requests. The simulation results show that the algorithm can further improve the success rate of high-priority video service resource reservation.
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