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Cloud computing is an innovative model that is gaining attention and wide popularity among IT professionals and users. It provides a new mode of use of IT resources by offering everything as a service (storage, servers, network, etc.) and provisioning resources on-demand. In cloud computing environments, users outsource their data to distributed data centers in the cloud and entrust cloud providers...
In a cloud computing environment, cloud users are competing for the same shared resources in order to run their applications or storage their data. In fact, cloud providers try to offer the necessary resources according to the users' demands giving the illusion of infinite resources. However, when these resources are insufficient to satisfy the users' requirements, conflicts may appear. Thus, it is...
Cloud Computing is a revolutionary model that offers everything as a service (storage, servers, network, etc.). It enables users to outsource their data and entrust a service provider with its storage and processing. However, we are doing with resource-limited environment where users compete to have enough resources for their tasks. Thus, a resource allocation model is needed for a better utilization...
This paper addresses the problem of wireless resource allocation in OFDMA-based cognitive radio cooperative systems. The objective is maximizing the total throughput and minimizing the transmission power of cognitive transmissions while guaranteeing fairness between the different cognitive users queues. The proposed radio resource allocation algorithm is based on maximizing the rate to power ratio...
In this paper, we propose a new dynamic frequency assignment scheme for femtoCells in OFDMA networks. The femtoCell base stations are small cellular base stations specially designed to improve the poor indoor coverage and increase the system capacity for cellular and wireless broadband networks. However, these femto-base stations cause harmful interference to the macroCells. Therefore, the optimization...
The increasing demand for high data rate services has created an acute requirement for efficient subcarrier assignment and power control algorithms in orthogonal frequency division multiple access (OFDMA) systems. Resource allocation optimization becomes even more constraining in multi-cell OFDMA systems because of the presence of co-channel interference (CCI). In this paper, we mitigate the CCI impact...
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