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This paper offers a comparative analysis of quality of service (QoS) of the queuing disciplines Priority Queuing (PQ), Custom Queuing (CQ), Weighted Fair Queuing (WFQ), Class-Based Weighted Fair Queuing (CBWFQ) and Low-Latency Queuing (LLQ), with self-similar and long-range dependent traffic, through experimental measurements with routers. We take into account two different classes of traffic: real-time...
As the Quality of Experience of video streaming can be greatly affected by parameters such as jitter, throughput, packet loss and delay, it is of great importance to assess the consequences low Quality of Service. Video artifacts are errors that can be displayed when multimedia streaming faces transmission difficulties. Blocking, ringing, motion compensation mismatch or false borders are some of the...
The continuous technological advance has generated a greater demand on the communication services. It has led to the development of new technological tools that have been able to cover this demand, and one is the WebRTC (Web Real-Time Communication) project. This project starts as an alternative to synchronous communication or in real-time P2P (Peer-to-Peer) in web applications with the advantage...
Video streaming applications over wireless networks have been turned out to be immensely popular in recent times. In this thesis, we study the buffering schemes streaming in heterogeneous wireless networks for the VBR video. An analytical framework is presented to derive the number of expected jitters and buffering delay in average. Through experimenting with a wide range of buffering schemes, we...
MCU-ru is a popular video conference system, improved from Multipoint Control Unit (MCU) open source. Users can send their video streams to MCU server and the system compresses all received video streams into one mixed multiple-view stream and sends back to all users. This method allows users with modest Internet bandwidth to video conference. Although the system works well in many countries, the...
Recent surge in the data rate requirements due to the bandwidth demanding applications has triggered the quest for developing high capacity access networks. Wireless optical integrated networks have emerged as a very effective solution for providing mobile high data rate connections to the users. However, the independence of the wireless and optical network protocols makes it challenging to provide...
In Recent times, real time applications are increasing gradually which have specific Quality of Service (QoS) requirements. IEEE 802.11e is aimed to provide such QoS. 802.11e uses traffics differentiation among flows using a parameter set. The flows are admitted using their priority. The voice and video flows are admitted in most of the times due to their higher priority. This causes the increase...
ITU-T H.264/MPEG-4 Scalable Video Coding (H.264/SVC) is one of popular video coding standard after H.264/MPEG-4 Advanced Video Coding (H.264/AVC) which was created by Joint Video Team (JVT) between Video Coding Expert Group (VCEG) ITU-T and Moving Picture Expert Group (MPEG) ISO/IEC. This standard allows video coding using single layer or more ones to provide the scalability of the coded video.
In this paper, an audiovisual quality assessment experiment was conducted on audiovisual clips collected using a PC-based videoconferencing application connected via a local IP network. The analyses of experimental results provided a better understanding of the influence of network impairments (packet loss, jitter, delay) on perceived audio and video qualities, as well as their interaction effect...
Many multimedia applications employ transmission control protocol (TCP) to send video packets. TCP ensures reliable transmission but experiences significant delays. Various techniques have been proposed to enhance the performances, for instance by controlling TCP window. This paper proposes a split-routed acknowledgement packet that is aimed to reduce acknowledgement delay. The simulation evaluations...
Deterministic communication is currently a fundamental requirement for many real-time systems, such as drive-bywire and autonomous driving solutions; however, in the last few years there has been a sustained increase in the number of other type of on-board connected devices such as actuators, rear vision cameras and multimedia services using different networks on the same vehicle, thus adding weight...
Nowadays Vehicular Ad hoc Networks is one of the most promising application areas of the wireless networks, able to organize without predefined infrastructure. In particular, the transmission of video data in the ad-hoc represents a major issue due to the immense enrichment by the video information of the quality of experience perceived by the user and knowledge of the environment in many applications...
The IP Multimedia Subsystem (IMS) enables the convergence of voice, data, and multimedia services. IMS is well integrated with existing voice and data networks, while adopting many of their key characteristics. SIP (Session Initiation Protocol) provides a pathway to build a single unified network, bridging the gap that previously existed between the once-separated Telecom and Internet networks. The...
Future generation of heterogeneous wireless network is expected to provide multimedia, multi class applications any time anywhere with required degree of Quality of Service (QoS). However, every application has different QoS requirement in terms of acceptable packet loss, jitter, delay, throughput etc. Therefore, in such environment providing guaranteed end to end QoS along with seamless mobility...
Since complex network environment makes the video data with network resources change quickly, video transmission must possess the ability to adapt to the change of network status. After studying the video stream congestion question as well as the network adaptive transmission control and the transmission characteristic of RTP (Real-time Transport Protocol) RTCP (Real-time Transport Control Protocol),...
Packet-level simulators are unsuitable for the investigation of large networks over sustained periods. In this paper, we present FLEO, a flow-level network simulator. It is written as an extension to OMNeT++, a packet-level discrete-event simulator. FLEO can model best-effort transfers, as well as constant bitrate flows. These flows can also be prioritised, thus modelling quality-of-service (QoS)...
Nowadays, world is on going to “Convergence Era”, where data, voice, and video overcome to pass through same network, like IP network. Unfortunately, the fast growth of application technology has not been supported yet by default IP network in the case of quality of service. We have known, that voice over IP services have sensitivity to delay, jitter and latency. And it require of different bandwidth...
Providing guaranteed services in the Internet has become extremely essential to fulfill the requirements of the Internet users. With an increase in the number of users and demand for multimedia applications like video streaming, VoIP and video conferencing, larger bandwidth requirement increases drastically since such applications are very sensitive to delay, packet loss, and jitter. In such an environment,...
Today, One of the most important performance measures in the new burst traffic gets to 3G and 4G systems is the End-to-End jitter. However, in order to study and analyze Jitter, many works and models have been devoted to estimate and evaluate this parameter. In this paper, analytical formulas for jitter of interrupted Poisson traffic (IPP) and MMPP-2 are presented. We provide Jitter approximation...
In a heterogeneous environment of 4G broadband networks, participating technologies orchestrate their own provisioning for the Quality of Service (QoS) management. As we move towards 5G, those technologies are moving towards a common set of objectives to offer the end users higher capacity, robustness, security, QoS, etc. in a unified and converged manner. In order to provide end-to-end QoS support...
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