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This paper studies heuristic search-based optimization of service compositions. We have investigated applying Genetic Algorithms (GA) to optimize service-oriented architectures (SOA) in terms of security goals and cost, we help software Engineers to map the optimized service composition to the business process model based on security and cost. Service composition security risk is measured by implementing...
Cloud computing employs parallel and distributed computing concepts to provide users with shared resources through the internet. One of the most important issues which are raised in a cloud environment is task scheduling on existing resources; so that on the one hand it can provide user's requirements, such as minimum run time or cost and on the other hand with the proper use of resources, can also...
Consider the diversity of users' traffic types, we investigate the problem of distributed carrier aggregation in cognitive small cell networks. In most existing carrier aggregation (CA) researches, they aimed to optimize the throughput or to mitigate the interference. However, in practical wireless communication users' quality of experience (QoE) is the ultimate concerning. Different QoE functions...
While various platforms are offering facilities for single-cloud application design, deployment and provisioning, there is a need to move to multiple clouds in order to achieve cost-effectiveness and avoid vendor lock-in. Apart from not supporting multi-cloud application management, many platforms usually focus on the deployment and provisioning phases of the cloud-based application lifecycle by neglecting...
The Internet has seen a strong move to support overlay applications and services, which demand a coherent and integrated control in underlying heterogeneous networks in a scalable, resilient, and energy-efficient manner. To do so, a tighter integration of network management and overlay service functionality can lead to cross-layer optimization of operations and management, which is a promising approach...
Cloud computing is increasingly used to deliver multimedia services with stringent Quality of Service (QoS) requirements, rather than simple infrastructure. Due to these requirements, the QoS-aware, cost-efficient selection of data centers arises as a new research challenge. In our ongoing work, we examine the corresponding Cloud Data Center Selection Problem and propose an exact optimization approach...
To optimize their networks, Telecom operators tend to use the quality of Service (QoS) differentiation in order to ensure fair use and sufficient capacity. In this study, the economic impact of QoS differentiation mechanism implementation in 3G network for streaming flows is assessed according to QoS satisfaction constraint. Two approaches are developed through different scenarios. In the first case,...
A main challenge for service providers is managing service-level agreements (SLAs) with their customers while satisfying their business objectives, such as maximizing profits. Most current systems fail to consider business objectives and thus to provide a complete SLA management solution. This work proposes an SLA-driven management solution that aims to maximize the provider's profit by reducing resource...
One of the most significant concerns in designing on-chip networks is guaranteeing QoS requirements for various applications. In this paper, we propose a buffering method which reduces the router's area and in turn network cost without affecting the QoS issues. The proposed method rather than considering a dedicated buffer for each class of traffic, assigns a single shared buffer on each port to the...
This paper presents the study on the cost analysis for the Video-on-Demand (VoD) system exploiting the advantages of the Peer-to-Peer (P2P) architecture. Our objective is to tackle the problems in analyzing cost and to come up with efficient cost analysis model (CCAM) thereby enhancing the revenue to the system. We adopt a partially decentralized P2P architecture with a cluster based approach to find...
In bid invitation, the project owner is interested in deploying the contract mechanism that will secure reliable service at the cheapest cost and best quality. On the other hand, the contractor bidding for the project is interested in winning the contract at a price that assures him a reasonable profit margin. This paper develops a game-theoretic model which studies the contract design problem of...
This paper proposes a middleware to reduce the consumption of network resources and optimize the provision of location of traffic. This middleware, called MILCO (middleware for location cost optimization), selects the optimum location technique for each location request, i.e. the location technique that satisfies the required quality of service (QoS) and which, at the same time, minimizes the operating...
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