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This paper describes the design, implementation and testing of a prototype system that processes and manages games on a remote server and played on a mobile device. The game application is executed on the remote server and video-streamed to a mobile device over WiFi. The mobile keyboard input is relayed to the server to control the game. The prototype test-bed includes a virtualization based infrastructure...
With the wireless landscape being rather heterogeneous, handover between different network technologies, so-called vertical handover, becomes key to a continued success for wireless Internet access. Recently, an extension to the Stream Control Transmission Protocol (SCTP) -- the Dynamic Address Reconfiguration (DAR) extension -- was standardized by the IETF. This extension enables the use of SCTP...
The increasing number of interfaces using different access technologies in modern devices gives opportunities for enhancing the Quality of Service (QoS) delivered to multimedia and interactive data transfers involved in distributed applications. In the current Internet, the presence of "middleboxes" such as Network Address Translators (NAT) or firewalls hardly lets applications use any Transport...
In this paper we describe a game theoretic framework for scalable video streaming over a peer-to-peer network. The proposed system integrates optimal resource allocation functionalities with an incentive provision mechanism for data sharing. First of all, we introduce an algorithm for packet scheduling that allows users to download a specific sub-set of the original scalable bit-stream, depending...
This paper compares interactive Multi-View Video and Audio (MVV-A) IP communications and interactive Single-View Video and Audio (SVV-A) ones in terms of QoE. We employ a task which makes use of characteristics of interactive MVV-A and perform a subjective experiment. We conduct multidimensional assessment and principal component analysis of QoE with 14 pairs of polar terms by the SD (Semantic Differential)...
In this paper, we present a first analysis of the application of Raptor codes in the domain of P2P streaming. With the help of fountain codes, such as Raptor codes, it is possible to completely omit content reconciliation in P2P networks. Hereby, the scheduling complexity of the data dissemination is greatly reduced. The contributions of the paper are the following: First, we present our implementation...
This paper presents a DiffServ based adaptive QoS model for real-time interactive traffic in constrained bandwidth IP network without over provisioning the users. A WRR based QoS scheduling algorithm has been implemented to allocate the network resources to the users. A tuning parameter for VBR real-time traffic is also introduced in order to provide fair performance to the non real-time traffic as...
OpenFlow is a Software Defined Networking (SDN) paradigm that decouples control and data forwarding layers of routing. In this paper, we propose OpenQoS, which is a novel OpenFlow controller design for multimedia delivery with end-to-end Quality of Service (QoS) support. Our approach is based on QoS routing where the routes of multimedia traffic are optimized dynamically to fulfill the required QoS...
This study presents a methodology to transmit 2D echocardiogram video over WiMAX networks in real-time. Before transmission the echocardiogram has to be compressed. In order to compress the echocardiogram the 3D SPIHT algorithm was used. To guarantee the clinical quality of the compressed echocardiogram a clinical evaluation of the compressed echocardiogram was carried out. The evaluation yielded...
The most important tendency of future Internet architectures is maintaining the best Quality of Experience (QoE), which represents the subjective perception of end-users using network services with network functions such as admission control, resource management, routing, traffic control, etc. Among of them, we focus on routing mechanism driven by QoE end-users. Nowadays, most existing routing protocols...
This work presents a test called “sizogram” which characterizes the packet loss vs. packet size behavior of a router. This graph can help us to take some decisions about traffic, e.g. multiplexing or not, the number of samples or frames to be included in a packet, etc. In addition, it can be useful to have a better idea of the internal architecture of the router. Simulations have been carried out...
HTTP Adaptive Streaming (HAS) is becoming the de-facto standard for adaptive streaming solutions. In HAS, video content is split into segments and encoded into multiple qualities, such that the quality of a video can be dynamically adapted during the HTTP download process. This has given rise to intelligent video players that strive to maximize Quality of Experience (QoE) by adapting the displayed...
The article is analyzing the real impact audio and video streams for teleconferencing services in NGN networks. The test scenario is based on examining the data flow between Asterisk PBX and SIP client. This examination is performed by analysis of the data stream for the Asterisk PBX, depending on the parameters for audio / video stream to the SIP client. These parameters are represented using different...
End-hosts are increasingly equipped with multiple network interfaces, ranging from smartphones with multiple radios to servers with multi-homing. These interfaces are diverse; some are expensive to use (e.g. 4G), some are free (e.g WiFi) and they have different rates and reliability. On the other hand, end-hosts now run diverse applications with different priorities, from relatively less important...
The quality of service inWireless Multimedia Sensor Networks (WMSN) is related to packet loss rate. Recently different studies have been done on developing efficient protocols in the transport layer for controlling packet loss in WMSN. However, all of these protocols are independent of the characteristics of multimedia content. In this paper, a novel transport layer protocol, called User Datagram...
Video services are being adopted widely in both mobile and fixed networks. For their successful deployment, the content providers are increasingly becoming interested in evaluating the performance of such traffic from the final users' perspective, that is, their Quality of Experience (QoE). For this purpose, subjective quality assessment methods are costly and can not be used in real time. Therefore,...
In this paper, we propose QoE assessment model for video streaming service such as IPTV and VoD using QoS parameters in wired-wireless network. Existing perceptual quality assessment models are unsuitable for experienced quality assessment of a streaming service which passed through the IP-based network because they only take account of the characteristic of used codec and bit rate. However, QoS parameters...
Medium Access Control (MAC) scheduler entity forms one of the most important parts of any high speed packet access system like HSDPA or LTE. To the best of our knowledge the LTE MAC schedulers that had been proposed so far constitute of sub-carrier resource scheduling mostly based on single criteria like user throughput, link conditions, buffer constraints or power requirement. The above LTE MAC scheduler...
In last decayed a big revolution has been done in the communication and network industry and in presence scenario cloud computing has been playing a significant role for last one year. Since user or client preferred flexibility to acquired any network on the basis of bandwidth, QoS (Quality of service) and Cost i.e. cost should be proportional to demand and uses of data. In this paper we have given...
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