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Resource consumers and resource providers are the main infrastructures of the computational grid environment. The part that connects these components and makes this system a usable infrastructure is grid scheduler. Its role is to select the proper resource and sending its identifier to the user. It is obvious that, this process of resource selecting is a multi-criteria decision making problem, because...
The majority of current security architectures for grid systems use public key infrastructure (PKI) to authenticate identities of grid members and to secure resource allocation to these members. Identity-based secret public keys have some attractive properties which seem to align well with the demands of grid computing. In this Paper, we proposed identity-based secret public keys. Our new identity-based...
In the case of congestion the competition of flows for obtaining network resources increases and since the network resources are shared between different flows, the fair allocation of them becomes a crucial issue. In this work, we propose a fair active queue management (AQM) mechanism based on a well-known economic model called supply and demand. AQM is an effective router-based approach for avoiding...
In this paper, we propose a channel aware fast utility-based algorithm for allocating power and subcarrier to the users in Orthogonal Frequency Division Multiple Access (OFDMA) networks. Utility function is a proven approach for fair and efficient radio resource allocation. Most of the proposed schemes in the related literature consider continuous rate adaptation. However, our proposed algorithm utilizes...
In wireless sensor networks, sensor nodes are capable of not only measuring real world phenomena, but also storing, processing, and transferring these measurements. Many techniques have been proposed for storing and retrieving data in these networks. These methods are classified into three main categories. Data-centric storage is the most important one. The name comes from the fact that data's storage...
IRCRT is an end-to-end reliable transport protocol that acts according to RCRT, but improved its rate allocation unit. In this protocol, nodes can go in OFF state, and when a node is OFF, sink does not allocate any rate to it, so other nodes can use better from the channel capacity. In addition, when any part of network becomes congested, this protocol only decreases the rate of nodes that are in...
Considering convergence of vast and different technologies in new generation networks, the required quality of service is the key success factor. The site implementation according to special benchmarking (TPC-W), to achieve the acceptable service performance may be offered in a cost effective manner, is very complicated. In this paper a mathematical method will be introduced to help providers to make...
One of the important targets in new generation data centers is minimizing the cost through efficient use of available resources. Virtualization is a new technology that provides an opportunity for extension of independent virtual resources based on available physical systems. This paper evaluates performance of virtualized versus non-virtualized servers in data center applications. We have presented...
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