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Network virtualization is a promising solution that can offer more flexibility and prevent Internet ossification without requiring extensive network redesign. Using virtualization multiple heterogeneous virtual network (VN) architectures can cohabit on a shared physical network substrate. Virtualization can be used to run multiple different applications (e.g., operating systems, servers, networking...
NUM (Network Utility Maximization) problems have worked as an important approach to solve network deployment problem especially for network resource management. In existing literature, NUM model has been used to provision optimal network resource allocation. However, in practice, routing and transmission delay would not be ignored. Without routing, we would not achieve the “real” maximum utility....
In this paper, we addressed the problem of redundancy allocation for protecting packet loss for better quality of service (QoS) in real-time H.264 video streaming. A novel error-resilient approach is proposed for the transmission of pre-encoded H.264 video stream under bandwidth constrained networks. A novel frame importance model is derived for estimating relative importance index for different H...
In this paper, a novel GOP level unequal loss protection (G-ULP) scheme is proposed for robust H.264-coded video streaming over packet loss networks. This scheme use frame error propagation index (FEPI) to characterize video quality degradation caused by error propagation in different frames in a GOP when suffer from packet loss. A fast FEPI calculation method in compression domain is also proposed...
Network operators need high capacity router architectures that can offer scalability, provide throughput guarantees, and maintain packet ordering. However, current centralized crossbar-based architectures cannot scale to fast line rates and high port counts. On the other hand, while load-balanced switch architectures that rely on two identical stages of fixed configuration meshes appear to be an effective...
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