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Dynamic Adaptive Streaming over HTTP (MPEG-DASH) is becoming the de-facto data format and streaming solution for over-the-top (OTT) video on-demand streaming. The underlying HTTP transport has its limitations and known penalties in slow start, under-utilization, and other inefficiency. An alternate approach to DASH is the new transport schemes like HTTP/2.0 and WebSocket. In this work, we explore...
The design of interactive Near Video-on-Demand (NVOD) systems is highly complicated when scalable stream merging is used. We propose an intelligent client-side cache management policy for these systems, allowing and exploiting cache discontinuity. This policy maximizes the percentage of interactive requests serviced from the client's own cache without requiring any resources from the server. The policy...
A video streaming system with over-the-top delivery has to select the servers that handle the service requests such that the content is delivered with the desired quality and system resources are efficiently used. Server selection can be formulated as a multi-criteria optimization problem, but solving this problem requires dynamic information about system resources. In this paper, we study the performance...
This paper presents a mechanism to use Traffic Analysis (TA) for identifying sources of tunneled video streaming traffic. The key idea is to probe encrypted and tunneled video streaming traffic at a client-side firewall so that the firewall can identify the traffic source using traffic analysis, and block or throttle traffic from that particular source. The key contribution in this paper is to evaluate...
This paper proposed a smart home care system for elderly or baby on mobile devices. The system can help users to use their smartphones to quickly build a smart monitor network at home anytime and anywhere. The system is based on live video streaming and image processing techniques. Based on video streaming, we can watch the elderly or baby anytime and anywhere. In addition, we combined object tracking...
This work demonstrates the effects of multi-layer adaptivity for a wireless live video streaming scenario. We investigate a specific type of adaptations, the so-called transitions, which switch between different network mechanisms during the runtime of an application. In comparison to a pure configuration adaptation, a transition is beneficial because a system may select those mechanisms that perform...
Nowadays, Internet video is the dominant internettraffic. DASH is an adaptive video streaming technique introducedto enable high quality video delivery over HTTP. In homenetworks, multiple video streams will compete for bandwidth, thus leading to poor performance and impacting the receivedquality of experience. In this paper we introduce a new techniqueto address this issue at the home network gateway...
Video traffic constitutes the majority of traffic in bytes that mobile and fixed line operators deliver to their customer. This type of traffic is both resource consuming and QoE sensitive. A third characteristics is that user abandon, in a lot of cases, viewing prematurely. Several strategies have been devised to account for all those dimensions. Dominant approaches are fast-caching where the server...
The smooth video streaming over HTTP through 3G/4G wireless network is challenging as available bit rate in the internet changes due to sharing of network resources and time varying nature of wireless channels. The present popular technique Dynamic Adaptive Streaming over HTTP (DASH)provides solution up to some extent to stored-video, but the effective adaptive streaming of a live video remains a...
Cloud computing technology, especially virtualization is employed in many data centers nowadays. The key concept of virtualization concerns elastic or scalable infrastructure. This concept can be implemented by exploiting multi-tier web applications and hypervisors which are virtual machine management software. Xen hypervisor has presented its Version 4.4 in 2014. In this paper, we present the performance...
Data center network architectures are widely applied in cloud computing. Clients requesting access to multiple servers in multicast environments typically results in throughput collapse because of transmission control protocol (TCP) retransmissions and limited switch buffer sizes. This communication pattern is known as TCP Incast. This study investigated the network performance of a cloud environment...
To understand better what happens when video streaming takes place, this paper introduces a framework to simulate a real-time video streaming over wireless channels. The system is divided into many modules and is simulated with different tools. DUMMYNET is used for the network simulator while FFMPEG is for coder/encoder and sender/receiver module. The video quality is measured by spatial (SSIM and...
e-lab is a remote laboratory which provides the control of real physics experiments over the internet. The robustness of the laboratory framework has allowed the implementation of new experiments outside the main physical laboratory, for instance in high schools and science centres. To reduce costs and the number of maintenance interventions, a new and simple hardware platform to access and control...
The aim of our work is to develop an application that runs on a mobile platform, and performs live streaming from the camera of a phone to other phones and PCs. The application should be able to adapt the quality of the video according to external factors like the strength of the network connection.
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...
Crowdsourcing-based video service systems, e.g., Thunder Crystal, are novel content distribution platforms composed by a large number of agent devices, acting like miniservers. Most agents are normal Internet users who would like to earn rewarded cash by uploading content through their devices. Compared with CDN, the bandwidth cost is much cheaper; while compared with Peer-to-Peer(P2P), the bandwidth...
Video data has been growing in importance over the last decade, and it is expected to exceed all other forms of networked data in for some time. This is also the case for the specific scenario of mobile data, where more than 60% of traffic globally will be video data. As the future Internet will encompass traffic from the Internet of Things, including low power personal devices in low quality media...
Adaptive video streaming over HTTP (DASH) is a recent technology adopted as the choice for delivering videos to smart phones, TV's, portable data units. Therefore, many services providers tend to adopt it as the basis for their services. In this paper, we focus on the problem of the typical behaviour of DASH, which runs over Client/Server network architecture causing limitations in its performance...
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...
Providing robust video streaming along with efficient wireless resource usage is necessary for mobile users, especially on subway, and mobile carriers. To achieve this, we propose a highly-reliable buffer strategy based on long-term throughput prediction. Our approach has two elements which are called “long-term throughput prediction” and “guaranteed playout buffer filling mechanism.” To avoid any...
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