Cherif Ghazel

A survey on quality of service in cloud computing

The quality of service is one of challenges posed by the Cloud Computing. This issue plays an important role in making the Cloud services acceptable to customers, denotes the levels of performance, reliability, and availability offered by Cloud services. Literature has reported many implementations for measuring and ensuring QoS in Cloud Computing systems to achieve better results and meet the needs of producers and consumers. In this paper, we have presented a survey on QoS in Cloud Computing, the mechanisms and methods to guarantee quality of service (QoS) used to Cloud Computing services.

Dimensioning of Next Generation Networks Signaling Gateway for Improving a Quality of Service Target

In this paper, we propose a set of dimensioning rules, which deliver high quality session-based services over a Next Generation Network based IP/MPLS transport infrastructure. In particular, we develop a detailed dimensioning methodology for improving a target QoS requirement. The proposed methodology outlines an optimal equipment allocation strategy for a requested capacity. The benefits of operating a network under the paradigm of generous dimensioning, for converged multiservice traffic flows, include target QoS guarantee, scalability, and network resilience. We present and discuss experimental results which illustrate a practical implementation of the proposed dimensioning strategy and its benefits.

Satisfying QoS Requirements in NGN Networks Using a Dynamic Adaptive Queuing Delay Control Method

Abstract The Next Generation Networks (NGN) are required to support the seamless delivery of voice, video and data with high quality. One of the most important key features of NGN is Quality of Service (QoS), which has been a focal point of NGN research, development and standardization. In this work, we propose and demonstrate an efficient NGN QoS control method, which guarantees the QoS requirements expressed in terms of per-service traffic flow authorized queuing delay. Multiple service levels are used in order to provide differentiated services and prioritize traffic requiring high-level QoS. The advantages of the proposed method are demonstrated through modeling of the QoS queuing delay parameters. Simulation results are generated to evaluate the performance of the proposed method in terms of supporting the QoS and improving the network scalability based on queuing delay control and adjustment.

A Novel QoS-Aware Method Based on Resource Control and Management in NGN Networks

Next generation Networks (NGN) are required to support the seamless delivery of voice, video and data with high quality. One of the most important key features of NGN is Quality of Service (QoS), which has been a focal point of NGN research, development and standardization. In this work, we propose and demonstrate an efficient NGN QoS-Aware resource and admission control and management methodology which guarantees the QoS requirements. The advantages of the proposed method, in terms of QoS gains, are demonstrated through modeling of the main QoS parameters. Simulation results are derived to evaluate the performance of the proposed method in terms of supporting the QoS and improving the transport network scalability.

An Improved Model for Next Generation Networks with Guaranteed End-to-End Quality of Service

The quality of service (QoS) in the Next Generation Networks (NGN) has been of a particular interest to researchers, system designers, standardization organizations and various industries affected by these networks. In this paper, we propose and outline a control and signalling model which guarantees an end-to-end QoS for multi-service traffics in the NGN networks based on IP/MPLS transport. This work is based on previous works of various standardization bodies such as PacketCable, 3GPP, ETSI, MSF, and ITU-T. The proposed model treats the RACM as a basis component for a large scale QoS guarantee architecture. A key aspect of this model lies in its capacity to integrate the MPLS traffics engineering which offers a scalability and resilience to the transport network and guarantees the requested QoS.

Dimensioning of NGN Main Components with Improved and Guaranteed Quality of Service

In this paper, we propose a set of dimensioning rules, which deliver high quality session-based services over an NGN networks based IP/MPLS transport infrastructure. In particular, we develop a detailed dimensioning methodology for achieving a target QoS requirement, expressed in terms of per-service traffic flow throughput and delay. One of the benefits of the proposed methodology lies in outlining an optimal equipment allocation strategy for a requested capacity. We explore the benefits of operating a network under the paradigm of generous dimensioning, for converged multiservice traffic flows which include target QoS guarantee, scalability, and resilience of the transport network, while maintaining high resource management. We also present and discuss experimental results which illustrate a practical implementation of the proposed dimensioning strategy and its benefits.

Migration from Traditional Networks to Converged Next Generation Networks Architecture with Guaranteed Quality of Service

The development of more powerful communication systems, such as NGN networks, will soon make traditional communication systems obsolete. Instead of wasting these expensive and functional resources, it is more economical to explore ways of transforming them into sophisticated NGN-compatible architectures. This can be achieved through a suitably designed migration process from vertical networks with separate services to horizontal multiservice converged networks. However, different operators have different needs and objectives when undertaking this all-important migration process. In this work, we propose a migration strategy, which takes several factors into consideration. In particular, the proposed migration strategy aims for assisting established operators to capitalize on their existing resources and migrate smoothly towards converged NGN architecture. Most importantly, the desired upgrade is achieved while satisfying requirements in terms of QoS guarantees.

Dimensioning of Next Generation Networks Multiservice Gateway for Achieving a Quality of Service Target

In this paper, we propose a set of dimensioning rules, which deliver high quality session-based services over an NGN network based IP/MPLS transport infrastructure. In particular, we develop a detailed dimensioning methodology for achieving a target QoS requirement, expressed in terms of per-service traffic flow throughput and delay. The proposed methodology outlines an optimal equipment allocation strategy for a requested capacity. The benefits of operating a network under the paradigm of generous dimensioning, for converged multiservice traffic flows, include target QoS guarantee, scalability, and resilience of the transport network, while maintaining high resource management. We present and discuss experimental results which illustrate a practical implementation of the proposed dimensioning strategy and its benefits.

Autonomous Intercloud Reference Architecture Driven by Interoperability

Cloud computing is on the hype nowadays, new offering appears frequently and the demand on cloud services is growing in an exponential rate. In such dynamic and competitive market, working in silos is not a successful strategy. Therefore, single providers should integrate their resources and move up to a new level of cooperation and interconnection. This federation would bring in added value in terms of QoS, security, economics, etc. but also more complexity regarding federation management and how interoperability between disparate providers would be established. In this paper, we will present our federation concept through a layered autonomous intercloud reference architecture driven by interoperability.

Satisfying QoS requirements in NGN networks using an optimized resource control and management method

Next generation Networks (NGN) are required to support the seamless delivery of voice, video and data with high quality. One of the most important key features of NGN is Quality of Service (QoS), which has been a focal point of NGN research, development and standardization. In this work, we propose and demonstrate an efficient NGN QoS-Aware resource and admission control and management methodology which guarantees the QoS requirements. The advantages of the proposed method, in terms of QoS gains, are demonstrated through modeling of the main QoS parameters. Simulation results are derived to evaluate the performance of the proposed method in terms of supporting the QoS and improving the transport network scalability.