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Network virtualization allows the coexistence of multiple virtual networks on a shared substrate network. A virtual network created by a service provider (SP) typically spans across multiple domains that may be managed by different infrastructure providers (InPs). The topology and resource information on each domain is confidential and kept private by the InP. However, a domain-level view is required...
This paper focuses on the resource allocation of multicast services in Distributed Antenna Systems (DAS). First of all, the capacity limitation of conventional multicast ransmission in DAS is analyzed. Then a resource allocation algorithm for multicast services is proposed to improve the system throughput of DAS with Quality of Services (QoS) guarantees. The proposed algorithm includes three steps:...
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...
Video transmission over Internet can greatly benefit from adapting video content to diffserv network parameters, to better support the application requirements. In this paper, a novel content-aware packet priority ordering and marking scheme is presented for streaming H.264 coded video over differentiated services enabled networks. The scheme takes advantage of flexible macroblock ordering (FMO) coding...
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...
We use a stochastic fluid model (SFM) to capture the operation of finite-capacity queueing systems with multiple customer classes. We derive gradient estimators for class-dependent loss and workload related performance metrics with respect to any one of several threshold parameters used for buffer control. These estimators are shown to be unbiased and directly observable from a sample path without...
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