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Differentiated Services provide Quality of Service within a domain by aggregation of flows. There are mainly four modules which work together in Differentiated Services Classifier, Meter, Marker, and Shaper/Dropper. When congestion increases at Differentiated Services enabled router, Quality of Service is maintained according to the priority of packets by dropping lower priority packets, providing...
Mobile operators are today facing the daunting challenge of providing cheap and valuable services to ever more demanding customers. As a matter of fact, mobile standards have not yet really addressed this expectation of open, cheap and flexible web oriented internet access. As an alternative, we introduced an IP-centric QoS model mainly inspired by IP policies commonly found in fixed networks. In...
The mobile ecosystem is currently facing tremendous changes; in particular, the actual deployment of 4G will probably not be sufficient to totally fit the upcoming mobile data traffic explosion. This mismatch may be explained by the low marginal revenues expectable from mobile data compared to huge investments it requires. Consequently, congestion may appear soon in radio access networks, thus degrading...
The growth of different types of applications in the Internet arises the need for supporting Quality of Service (QoS) for them. Differentiating services aims to differentiate among applications in order to provide their requirements based on the level of QoS they need and their characteristics. In this paper we introduce a dynamic QoS-Aware queuing algorithm to differentiate services in IP basednetworks,...
Datagram Congestion Control Protocol (DCCP) is an unreliable transport layer protocol with a congestion control mechanism used for multimedia streaming. In order to use multiple network interfaces to transmit streaming data smoothly, a Multi-Path Datagram Congestion Control Protocol (MP-DCCP) is proposed and presented in this paper. Video streaming transmission through multi-path faces three problems:...
In this paper, the fuzzy logic-based decision algorithm is proposed for queue scheduling. This algorithm is employed to determine the optimal values for achieving fairness control for each queue-type serviced. It takes into account the dynamic nature of the internet traffic as regards to its time-varying packet arrival process that affects the network states and performance. In order that the fairness...
Network operators want to deliver multiple services to the end customers. This leads to the need of efficient transport of data using optical network technologies. OBS is a promising technology for metro networks, where the operator can locate their servers to provide services such as video, backup or PC virtualization. These services are competing for shared network bandwidth when running in parallel...
The multicasting of aggregated digital video over a proposed Future Internet backbone network with essentially perfect throughput, resource-utilization and QoS guarantees is summarized. The Future Internet routers require only minor modifications to the existing router designs. Buffers in existing internet routers are partitioned into 2 traffic classes which can co-exist, the Essentially-Perfect QoS...
The peer-to-peer (P2P) networks provides a data distribution model that is attractive for Video on Demand (VoD) as it allows to decrease the costs and increase the scalability of video distribution. The two significant challenges in P2P VoD streaming are scalability and video quality. Both require efficient utilization of the resources in P2P network. Inspired by this finding, the paper addresses...
The IEEE 802.16 standard for broadband wireless access is a low cost solution for Internetaccess in metropolitan and rural areas. Although it defines five service levels to support real-time and bandwidth demanding applications, scheduling mechanisms are not specified in the standard. Due to the wireless channel variability, scheduling mechanisms widely studied for wired networks are not suitable...
The influence of the uncertain or malicious service nodes on the Web service composition (WSC) performance is generally fatal in the Internet, so the problems of services selecting for WSC can not be completely solved by the perspective of performance. In the paper, the two-tier model of reputation computing, which describes the credibility evolution mechanism of the inter-entity relations in the...
The theory of a future Internet network which achieves essentially-perfect QoS guarantees for all QoS-enabled traffic flows for all loads ≤ 100% of capacity has recently been established. A scheduling algorithm with a bounded normalized service lead/lag (NSLL) is used to schedule traffic flows within the routers. An 'Application-Specific Token-Buffer Traffic Shaper' is used at the traffic sources,...
The transmission of stream media over the Internet require a high bandwidth. While the best-effort network could not provide constant transmission speed. The proxy server (PS) is the nearest part of the Internet to the client. The proxy can cache the data, and release the load of the servers. So the proxies have great influence on the video QoS. Through the perfect algorithm, within the acceptable...
The video applications based on internet are growing rapidly. The real-time video applications become more popular. Because of the complexity of the internet and the real-time demand on stream video, the real-time scheduling algorithm has great influenced on the quality of service. In this paper, a novel scheduling algorithm is presented, which associated with the theories of forward error correction...
Scheduling is a very important part of the cloud computing system. This paper introduces an optimized algorithm for task scheduling based on genetic simulated annealing algorithm in cloud computing and its implementation. Algorithm considers the QOS requirements of different type tasks, the QOS parameters are dealt with dimensionless. The algorithm efficiently completes tasks scheduling in the cloud...
In new generation cellular networks, opportunistic schedulers take advantage from the delay-tolerance of data applications to ensure that transmission occurs when radio channel conditions are most favourable. “Proportional Fair” (PF) is a well-known opportunistic scheduler that provides a good compromise between fairness and efficiency when transmitting long flows. Unfortunately, the PF algorithm...
QoS in Convergent networks is widely discussed item in IP networks. But with the implementation of the Next Generation Networks by most operators around the world, QoS for different services and applications must fulfill. In order to deal with this problem, we simulate end to end QoS parameters, according to ITU Y.1540 and Y.1541 recommendations and different scheduling algorithms proposed by manufacturers...
Grid and cloud schedulers benefit from predictable service for their choices in allocating jobs on remote servers/clusters. Predictable service on local clusters supports fairness and user satisfaction. The paper looks into servers that employ batch scheduling and support time sharing and/or space partitioning of the available resources among different parallel-job workloads. This provides the basis...
The proxy is one of the important parts of the Internet. The proxy can reduce the data flow and release the load of the servers. Because of the unpredictable problem of the network, the proxies have great influence on the video QoS. Through the perfect algorithm, within the acceptable scope, the proxy can improve the performance of the system. In the video service system, the proxy can improve the...
The problem of solving fast collaboration among many related enterprises has been an important research issue in the Web Society research area. The recent proposed Cloud Computing application model called the Community Cloud Computing has provided a good solution for this problem. This paper proposed a novel workflow system framework for the Community Cloud which meets the need of the process-based...
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