Non-Uniform Bandwidth Reservation For Real-Time Streaming Applications Based On Meter Table

Real-time streaming applications like VoIP, video conference and VoD need bandwidth reservation to provide deterministic service quality in long distance transmission. In this paper, we leverage the meter table of Openflow and propose a non-uniform bandwidth reservation method which can significantly improve the maximum number of reservation requests that network can accommodate. Different from the traditional flat and uniform bandwidth reservation along the end-to-end path, based on the network programmability provided by Openflow, this method reserves different bandwidth at each link according to the available resources and provides deterministic end-to-end service quality at the same time. With our method, the reserved bandwidth at bottle neck link can be significantly reduced and more user requests can be accepted compared with the traditional way. Through simulations, it is showed that our method outperforms the traditional reservation method in most scenarios for real-time streaming applications.