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In the paper, we address the influence of Head-of-line (HOL) blocking on real-time video streaming in wireless networks. We consider short channel failures when the probability of successful packet transmission to a station abruptly drops to a near zero value. In wireless networks, the duration of such channel failure intervals may reach some hundred milliseconds, making packets staying in the same...
This paper proposes a model for the management of virtual radio resources. The virtualisation of radio resources is based on aggregating and managing all the available physical radio resources in a set of infrastructures. In this approach, Virtual Network Operators (VNOs) use wireless connectivity in the form of capacity per service, and do not have to deal with physical radio resources at all. Due...
The increasing needs of mobile internet application services running on smartphone is driving the evolution of wireless communication networks, due to the diversity of traffic characteristics in addition to the rapid growth of data volumes. Differently from typical internet services like web browsing and FTP, the pervasive usage of always-on applications can lead to frequent User Equipment (UE) transitions...
Mobile sink has been a significant means to prolong the lifetime of Wireless Multimedia Sensor Networks (WMSNs). However, the mobility of the sink makes the modeling of the WMSNs lifetime a more complex issue. Considering the new properties introduced by a mobile sink, this paper proposed a novel model to define the lifetime of WMSNs with a mobile sink based on energy by taking into account the heterogeneity,...
We study the impact of the dynamics of the end-user playout buffer on the quality of experience (QoE) of the HTTP progressive video over wireless networks in this paper, especially the impact of the block size and the finite video length on the playback interruption during wireless video watching. The playout buffer at the end-user is formulated as a G/D/1 queue with arbitrary packet arrival and deterministic...
Playback delay control is an important mechanism to avoid jitter in video streaming systems. This paper introduces a playback delay minimization problem for multiuser video streaming systems providing a jitter-free video streaming service to end users in the system. In particular, a necessary condition on the playback delay for jitter-free streaming is obtained. Then, based on the derived necessary...
The MPEG-Dynamic Adaptation Streaming over HTTP (MPEG-DASH) tries to improve the quality perceived by the user by allowing the user's centric access to different resolutions of the video content via the Hypertext Transfer Protocol (HTTP). However, although it eliminates data packet loss, depending on the rate adaptation strategy adopted by the user, as well as, the network conditions, there may be...
Smartphones are frequently used to shoot and share videos online and emerging applications, such as Augmented Reality, will increase the usage of the camera. Unfortunately, shooting and streaming video drains a modern smartphone's battery very quickly. We report results from a measurement study to dissect the smartphone energy consumption when using such an application. Our main findings are that...
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