Abstract
Recently, there has been a surge of the video services over the Internet. However, service providers still have difficulties in providing high-quality video streaming due to the problem of scheduling efficiency and the wide fluctuations of end-to-end delays in the existing multi-path algorithms. To solve these two problems affecting video transmission quality, networks are expected to have the capability of dynamically managing the network nodes for satisfying quality-of-service requirements, which is a challenging issue for media streaming applications. Against this changing network landscape, this article proposes a dynamic and adaptive multi-path routing algorithm under three constraints (packet loss, time delay, and bandwidth) that are based on software-defined network for centralized routing computations and real-time network state updating in multimedia applications. Compared with related multi-path routing proposals, dynamic and adaptive multi-path routing makes efficient use of the latest global network state information achieved by the OpenFlow controller and calculates the optimal routes dynamically according to the real-time status information of the link. Moreover, our proposed algorithm can significantly reduce the computational overhead of the controller while completing a fine-grained flow balance. Experimental results show that dynamic and adaptive multi-path routing significantly outperforms other existing scheduling approaches in achieving a 35%–70% improvement in quality-of-service.
Highlights
With the rapid development of the Internet, the demand for video data is increasing dramatically, and video streaming usually occupies a large share of the network bandwidth.[1]
This article differs from existing QoS algorithms[2,4,5,7,8,9,10] because we offer a new adaptive scheduling scheme for obtaining the optimal routes and the best network utilization, which considers more than two constraints, with the Lagrange relaxation based aggregated cost (LARAC) algorithm.[11]
We propose dynamic and adaptive multi-path routing (DAMR) based on software-defined network (SDN) for video transmission to meet the three constraint requirements of delay, packet loss, and bandwidth
Summary
With the rapid development of the Internet, the demand for video data is increasing dramatically, and video streaming usually occupies a large share of the network bandwidth.[1] When link congestion occurs over the network, there will be a lot of packet loss or even critical traffic disruptions on the link.[2] For the traditional single-path routing, the bandwidth resources of the other links beyond the transport path are idle in the process of transmitting video streaming, which can’t be fully utilized. With the increase of network devices, the Internet access technology has made great progress, and there are a lot of reachable paths among the nodes, which makes multi-path transmission possible.[3]. It can use multiple paths to transmit the video traffic across the Internet, which can effectively utilize the bandwidth of
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