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We describe a “crowd measurement” project, referred to as PoQeMoN, whose main objective is to identify Quality of Service (QoS) indicators in order to predict the Quality of Experience (QoE) for HTTP YouTube content on mobile networks. Results are based on experiments on an operational network. The second contribution of this paper is to show that the proposed indicator is easy to implement in order...
We propose a new caching concept in which wireless nodes in Device-to-Device (D2D) network can cache the initialsegments of the popular video files and may share to users in their proximity upon request. We term this approach as Bootstrapping-D2D (B-D2D) system. Our findings suggest that caching only initial-segments creates a large pool of popular files, thus improving the probability of availability...
Aiming at meeting the application requirements of low time delay and packet lose rate of wireless HD video PAN, an Video Point Coordination Function (VPCF) mechanism for MAC layer scheduling based on IEEE 802.11 PCF is proposed in this paper. TSP service periods are allocated to video station, which has burst video frames to transfer, and the number of needed CBAP (Slot Period Transmission), is evaluated...
In this paper, we evaluate QoS (Quality of Service) and QoE (Quality of Experience) characteristics of 2K and 4K video distribution using MPEG-DASH (Dynamic Adaptive Streaming over HTTP). Evaluation results conclude that smaller playout buffer size contributes to QoE improvement.
A significant issue associated with the use of video see-through head-mounted displays (VST-HMD) for augmented reality is the presence of latency between real-world images and the images displayed to the HMD. For a static scene, this latency provides no real problem, however for dynamic scenes, which arise when the HMD user moves their head, when real-world objects move, or a combination of the two,...
A variety of wireless communication links today, such as HSPA+ access in high speed trains, balloon-based aerial wireless networks and satellite Internet connections have high loss rates. In such environments, Multipath TCP (MPTCP) offers a robust solution compared to regular TCP. However, MPTCP and existing schedulers suffer from performance degradation for both constant bit rate (CBR) and bulk traffic...
BTLive is a novel, unique, mesh/push-based peer-to-peer (P2P) live video streaming mechanism. Previous studies show that it achieves significantly lower streaming delays than other approaches but suffers from a high overhead, where peers receive up to 33% duplicate video chunks. Other P2P streaming mechanisms, most of which are either mesh/pull or tree/push-based, do not experience duplicates at such...
Real-time video services are usually delay sensitive and have strict constraints on the transmission reliability, which poses challenges to live video streaming over multi-hop wireless networks, since the unpredictable packet losses and network congestions caused by time-varying wireless channels greatly degrade the received video quality. To address this, in this paper, we propose a reinforcement...
In recent years, video streaming traffic has increased exponentially over the Internet. This can be observed through the emergence of various video on demand sites such as Netflix, Amazon movies and others. In parallel, IEEE 802.11 (WiFi) technology has been deployed extensively from home to public areas. Although significant research has been done to address issues on video streaming through WiFi...
Interactive video streaming requires very low latency and high throughput. Traditional latency based congestion control algorithm performs poorly in fairness. This results in very poor video quality to adaptive video streaming. Software defined networks (SDN) enables us to solve the problem by designing a network controller in the routers. This paper presents a SDN-centric TCP where sending rate of...
P2P media streaming is the most renowned application on the web. In live media streaming nearest neighbor should discover as quick as possible. It is the most time constrained application to find nearest peer over the internet. Scalability, QoS and low latency are the objectives of media streaming. To achieve these objectives a system is needed which speedily and perfectly finds the nearby peer by...
Although, it was shown that NC is a promising technique to improve the throughput; especially for multicast environment; it also bears negative side-effects (e.g., high decoding delay). Since streaming video are usually subject to strict delay constraints, high decoding delay must be resolved to enhance the performance of the NC schemes. To overcome this issue, this paper presents a new scheme named...
Development of wireless network technology to support various types of information services continues to increase especially in video streaming services. Video transmission especially in Mobile Ad Hoc Network (MANET) environment used in this research, particularly in the Combined Scalable Video Coding (CSVC) scheme which is a development of H.264 / MPEG-4. The contribution of this research focuses...
This paper proposes a simultaneous transmission method of Multi-View Video and Audio (MVV-A) with MPEG-DASH. In the MPEG-DASH protocol, the server stores multi-bitrate encoded videos in advance and transmits an appropriate video depending on network condition. In the simultaneous transmission method, the minimum bitrate videos of unselected viewpoints are transmitted with the video of the selected...
This paper's main objective is to analyze the quality of service using the network simulator NS2, in an infrastructure WLAN for voice, video, and data with IEEE 802.11g and IEEE 802.11e standards by access types DCF (Distributed Coordination Function), Enhanced Distributed Channel Access (EDCA) and Hybrid Coordination Function Controlled Channel Access (HCCA). For this purpose, comparative studies...
Modern internet traffic is heavily composed of some form of video communication. In addition, video streaming is slowly replacing regular phone connections. Given that most video transport utilizes Video over Hypertext Transfer Protocol/Transmission Control Protocol (HTTP/TCP), it is important to understand TCP performance in transporting video streams. Recently, multipath transport protocols have...
This paper considers the transmission scene of multicasting hard deadline constrained prioritized (HDCP) packets via cellular links and D2D links. That is to say, each device with two wireless interfaces could receive HDCP packets from the base station (BS) and transmit or receive HDCP packets from other devices concurrently. In this transmission scene, we study the problem of maximizing the network...
Multimedia streaming is a significant source of Internet traffic, with Netflix and YouTube accounting for more than 50% of North American fixed network peak download traffic in 2016. Dynamic Adaptive Streaming over HTTP (DASH) is a recent standard for live and on-demand video streaming services, where clients adapt the video quality on-the-fly to match the network capacity by requesting multi-rate...
Smart-home is becoming increasingly popular in recent years, and it introduces a new content retrieval paradigm - delay-insensitive downloading. In this new paradigm, users do not require the content retrieval task to finish as soon as possible, but only set a deadline for it. We study the role of this paradigm in the traffic engineering of a chunk-based cloud storage service. We propose that it could...
The downlink scheduling is always a key problem in the wireless communication. In time of LTE and 5G, the real time multimedia is demanding more resources and flexibility. To meet this ever growing challenge for the QoE of users, a novel layered scheduler is designed in this paper, which treats the constraint of delay and the object for maximal throughput separately. Taking the fluctuations in both...
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