Approach to optimal WRR weight assignment method in delay-limited environment
Noda Sho, K. Yamaoka · 2016
More and more people are using real-time networking services, such as VoIP, live streaming and online games, and the traffic amount of streaming communication is increasing every year. Streaming transmission has severe restrictions in terms of allowable delay and packet loss compared with data transmission. Various network designs have been proposed to satisfy these restrictions. For example, flow scheduling methods, which control the band distribution of traffic flows, have been proposed. However, such conventional scheduling methods do not take into account the allowable delay of each flow. When bandwidth allocation is scheduled with these inappropriate methods in such a situation, packets with enough time within the allowable delay may be given priority for being dequeued by the scheduler. In this case, more packets exceed their allowable delay. In this paper, we approach an optimal weight assignment method to maximize the number of packets transmitted on a node within the allowable delay and propose a suboptimal assignment method when each flow has a different allowable delay. We confirmed that the proposed method is more effective for transmitting packets within the allowable delay when the link's load increases and the allowable delay is severe.