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Content Delivery Cloud (CDC) extends Content Delivery Network (CDN) to provide elastic, scalable and low cost services to the customers. For multimedia streaming over CDC, caching the media content onto the edge server from storage cloud is commonly used to minimize the latency of content delivery. It is very important for CDN to balance between the resources being used (storage space, bandwidth,...
Throughput-sensitive multimedia applications, such as on-demand video streaming and non-interactive live streaming require a high sending rate and a certain-level of smoothness. On the other hand, interactive streaming such as on-line conferencing requires a smooth sending rate. TFRC and TFWC support smoothness-sensitive multimedia applications, however, they cannot provide enough sending rate to...
Shrew attack which causes TCP flows to attain zero throughput or a session reset by sending a very short bursts of attack pulses synchronized with TCP retransmission timeout value and makes the TCP packets to be dropped every time during TCP retransmission timeout. It creates a false congestion at the bottleneck links / routers. The Shrew attack can send packets either to non TCP ports or to TCP ports...
HTTP-based segmented delivery has become a popular choice for video distribution. The ability for clients to explicitly perform dynamic bitrate adaptation on segment boundaries has allowed clients to optimize the end user viewing experience. Client-based rate adaptation schemes, though, are typically greedy in nature and within the context of the network as a whole, these schemes may be sub-optimal...
Traditional sensor networks communicate all data to a central repository for collection and analysis. The data volumes are low so this works: data are moved. Multimedia sensor networks for environmental monitoring present a different scenario. Volumes of data are large and sensors may be located in areas of limited or poor connectivity. Typical cloud solutions do not work. In this paper we present...
Frequency-domain analysis is routinely used to analyze complex DSP and communication systems, however its application in processor performance analysis has been quite limited. This paper explores the utility of frequency-domain analysis with respect to the Cell BE processor targeting streaming multimedia applications. The paper utilizes FFT as a means to characterize workloads. FFT is applied to either...
As the rapid development of Internet, multimedia contents become increasingly dominant and voluminous in Web. Meanwhile contents duplication and redundancy become more and more common among different web sites. This bright inefficiency to our caching system, both in the utilization of cache storage and in the bandwidth cost. In this paper, we propose Content-Oriented Internet Cache Protocol (Co-ICP)...
Due to the recent popularization of digital broadcasting systems, selective contents broadcasting depending on viewers' preference, have attracted attention. For example, in a quiz program, a user selects his answer and watches the video content for the answer. When the server deliver programs reflecting users' preferences, clients have to wait until their selected contents start playing. Therefore,...
In this paper, a Differentiated Services (DiffServ) architecture for Quality of Service (QoS) provisioning in Wireless Multimedia Sensor Networks (WMSNs) is presented. The proposed architecture differentiates critical real-time data from real-time multimedia data by defining six traffic classes along with their forwarding behaviour. Since Wireless Sensor Networks (WSNs) are application-specific, DiffServ...
In this paper, a differentiated services based congestion control algorithm for Wireless Multimedia Sensor Networks (WMSNs) is proposed. Keeping in mind the characteristics of Wireless Sensor Networks (WSNs) and their possible extensions, the proposed algorithm categorizes WMSNs traffic into six different classes. The algorithm takes a novel and different approach towards congestion control in WMSNs...
The overall objective of this program is to build an effective and practical and efficient campus network. First, it clarifys the needs of the existing campus network, such as online office, school finance, e-mail and other related network information services. Then it provides a method to meet current, namely the use of Gigabit Ethernet. Finally, the network indicates a greater in the future state...
End-users are anticipated to have more freedom in dynamically connecting to any service provider for any service through their multi-mode terminals in the next generation heterogeneous integrated networks. This paper proposes a novel analytical framework of such a mechanism, which allows a user to freely determine one of the selection criteria, and to freely select one of the accessible networks to...
Due to the advance of wireless and mobile technologies, vehicular networks are widely discussed in recent years. When a vehicle requests a video stream from the Internet using the cellular network, i.e., 3G or 3.5G network, it may not have enough bandwidth to receive good quality of video. In order to resolve this problem, the vehicle can ask neighboring vehicles for the help of downloading the video...
The increasing demand for broadband wireless service in today's wireless communications, especially with WiMAX technology being one of the 3G standards, is causing cellular network providers to consider the integration of different heterogeneous networks. Consequently, network selection techniques play a vital role in ensuring quality of service in heterogeneous networks. In this article we have developed...
A image compression and adaptive smoothing transmission mechanism for wireless multimedia sensor networks. Goal of our work is to minimize image distortion with the multimedia sensor network conditions varying constantly. Method which uses Set Partitioning in Hierarchical Trees (SPIHT) algorithm based on lifting wavelets for real-time images compression is first presented, and then a framework for...
This paper investigates the call-level performance of a cognitive radio network for dynamic spectrum access providing multimedia service to secondary users. The serving system is modeled by a two-dimensional state-transition diagram and a novel approximate but computationally efficient analytical approach for solving its state probabilities is developed. A new precise formula for evaluation of the...
In wireless multi-content video broadcasting system, a critical problem is fairness among contents with respect to heterogeneous characteristics. To address this problem, we propose an approach of content-aware utility-fair streaming control scheme, which aims at heterogeneous QoS video provision and ensures max-min utility-fair sharing among video streams. First, we introduce a hybrid temporal-spatial...
In this paper, we propose Scale Stream, a new algorithm to support scalable multimedia streaming in peer-to-peer networks, under strict resources constraints. With the growth of multimedia consumption over the Internet, achieving scalability in a resource-constrained environment is indeed becoming a critical requirement. Intuitively, our approach consists in dynamically replicating the multimedia...
Nowadays high-performance multimedia SoC design always integrates a variety of function units (FU) into a single chip and these FUs impose great stress on the shared memory system. To improve the memory system utilization and meet a wide range of bandwidth and latency requirements of these FUs, a well-designed memory scheduler that takes the quality-of-service (QoS) into account must be adopted. In...
HTTP Streaming plays an important role in today's multimedia distribution over internet. Besides the data rate of network, the quality of user experience of HTTP Streaming is also related to multimedia's distortion that server could limit under a certain bit-rate. Given a specific bandwidth, how to provide the HTTP Streaming client the multimedia content with the least distortion in HTTP Streaming...
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