Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
While real-time service assurance is critical for emerging telecom cloud services, understanding and predicting performance metrics for such services is hard. In this paper, we pursue an approach based upon statistical learning whereby the behavior of the target system is learned from observations. We use methods that learn from device statistics and predict metrics for services running on these devices...
We propose a system architecture, an interface between controllers enabling them to exchange messages, and a Mininet-based emulation environment for video streaming over multi-domain software defined networks (SDN) with end-to-end quality of service. Emulation of large-scale multi-domain SDN with thousands of switches using the standard Mininet is impossible due to its performance limitations. In...
Software Defined Networking is a promising Internet architecture to deliver multimedia with end-to-end quality of service (QoS) since it enables optimal dynamic management of network resources and on-demand QoS provisioning by a network operator. We propose a framework for server load-balancing over a single-operator OpenFlow network to improve the quality of service levels of video streaming services...
In Multimedia network applications, adaptive mobile streaming empowers cloud-based real time transcoding. The researchers in media cloud propose a well-organized technique to split the video content into different frames. The technique is to carry out disseminated encoding to resolve the multimedia data conversion problem. Also, it introduces an energetic outgoing and an extrapolative bandwidth for...
In this paper, we propose an adaptive routing approach for video streaming with QoS (Quality of Service) support over Software Defined Networks (SDN), called ARVS. In our approach, base layer packets and enhancement layer packets of video bit streams are treated separately as two levels of QoS flows (level-1 and level-2 QoS flows). During video streaming, if the shortest path does not satisfy the...
The growing popularity of mobile devices equipped with wireless interface makes Mobile Ad-hoc Networks (MANET) become an interesting architecture for rapid deployment of related applications without relying on any infrastructure. When the MANET is dense, and the source is located more than one hop away from the destination, providing delivery ratios that meet real-time video streaming constraints...
In order to assess the quality of experience (QoE) of HTTP video streaming, the model of three levels of quality of service (QoS): network QoS, application QoS and QoE, is employed in this paper. We mainly study the effects of pause position, and therefore propose two new application performance metrics: location of each pause and time interval of pauses. We first focus on the buffer behaviors of...
For content delivery in Peer-to-Peer (P2P) video streaming systems there are two main approaches: push-based and pull-based. In P2P Video-on-Demand (VoD) systems, neighbor peers might watch the same video with very large differences in viewing point; thus using push-based approach is not sufficient for these systems. Also, with using pull-based approach, peers need large buffers to achieve better...
In recent years, the BitTorrent (BT) has been one of the most efficient mechanisms for Peer-to-Peer (P2P) non-realtime content distribution. Many approaches for streaming videos over BitTorrent have been proposed by modifying the piece selection policy to cope with the real time requirement. Most of them provide the continuity of video playback at the cost of the variety of pieces on P2P streaming...
In this paper, the quality of experience (QoE) of real-time video streaming over long term evolution (LTE) networks is investigated. Network QoE metrics are proposed in order to capture the overall performance of radio resource management algorithms in terms of video quality perceived by the end users. Thus, real time video streaming over both the uplink (UL) and downlink (DL) directions is investigated,...
The quality assessment of multimedia services as perceived by the end-user is a challenging task. In a controlled environment, it is easy to measure the user's Quality of Experience (QoE) against the influence of controlled network parameters. However, in an uncontrolled environment, it is difficult to measure the Quality of Service (QoS) perceived by end-users, due to the unpredictable behaviour...
Mobile Content Delivery Networks (MCDNs) are designed to effectively support the delivery of continuous and discrete media to mobile consumers over cellular networks. Enabling large scale content distribution at a reasonable cost and without overloading the mobile core network is a crucial design goal for network operators. Nowadays, a key task for network operators is the development of efficient...
For content delivery in P2P video streaming systems there are two main approaches: push-based and pull-based. In pull-based P2P video streaming, neighbor peers request missed chunks of video from each other, but sometimes peers can't receive this chunks because of the exit or delay of the corresponding neighbor. Although previous works such as forward error correction (FEC) and automatic repeat request...
Efficient delivery of video sequences over best effort networks is challenged by delay variations and packet losses which occur due to congestion at intermediate routers in addition to the stringent quality of service (QoS) requirements of video applications. In this paper, we propose a joint path diversity and priority-based queuing scheme for video streaming over best effort networks like the Internet...
Voice over IP (VoIP) is increasingly replacing fixed line telephone systems globally due to lower cost, call quality improvement. More and more application improvement and Video communication is emerging as an alternative to traditional public communication. End-to-end QoS for large Enterprise consists of three general areas: cutomer premises QoS ("LAN QoS"), Service Provider (SP) core network...
The continuous growth of mobile users and bandwidth-consuming applications and the shortage of radio resources put a serious challenge on how to efficiently exploit existing networks and contemporary improve Quality of Experience. One of the most relevant problem for network operators is thus to find an explicit relationship between QoS and QoE, for the purpose of maximizing the latter while saving...
Wireless multimedia streaming became a popular service of today's mobile networks, however due to the limited battery capacity energy efficient solutions are required to extend the availability of the mobile device. Although energy efficiency is getting more and more critical factor, the experienced quality of the customer can not be deteriorated. In this paper an energy efficient caching scheme is...
We construct an experiment testbed using commercial routers and demonstrate QoS-aware multi-path SVC video streaming with it. The testbed consists of six integrated services routers (Cisco 2900 Series) that are configured using a mesh topology. To realize QoS-aware multi-path routing efficiently, we develop a centralized automatic NC&M system that monitors link status proactively, calculates the...
In this paper, we propose a new approach to enhance today's hop-by-hop routing. The main goal of our work is to improve the efficiency of network usage and to support transmission requirements (TR) provided by applications. In the paper, we focus on non-functional requirements such as a desired upper bound for the end-to-end delay and a required data rate. Both are encoded as meta data in each data...
Datagram Congestion Control Protocol (DCCP) is an unreliable transport layer protocol with a congestion control mechanism used for multimedia streaming. In order to use multiple network interfaces to transmit streaming data smoothly, a Multi-Path Datagram Congestion Control Protocol (MP-DCCP) is proposed and presented in this paper. Video streaming transmission through multi-path faces three problems:...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.