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Cloud federation is the way to integrate various cloud data centers from a single vendor or multiple vendors for better resource sharing. This paper looks in to various cloud federation aspects with associated challenges and solutions. Few key challenges mentioned are networking delay, data corruption while transit, handling the control signal, security, QoS guarantees, etc. Various state of the art...
The concept of Distributed Generation (DG) emerged in the power industry from the last few decades due to the rapid increase in electricity demand, limited conventional resources and continuous growth in nonconventional energy based low voltage and small scale power industry. In distributed generation system, the optimal placement and sizing of DG units in radial distribution network is one of the...
Hadoop and the associated MapReduce paradigm, has become the de facto platform for cost-effective analytics over “Big Data”. There is an increasing number of MapReduce applications associated with live business intelligence that require completion time guarantees. In this work, we introduce and analyze a set of complementary mechanisms that enhance workload management decisions for processing MapReduce...
In this paper, we present measured within-die core-to-core Fmax and leakage variation data for an 80-core processor in 65 nm CMOS and 1) populate a parameterized energy/performance model to determine the most energy-efficient operating point for a workload; 2) examine impacts of per-core clock and power gating on optimal dynamic voltage-frequency-core scaling (DVFCS) operating points; and 3) compare...
This paper presents a self organized spectrum chunk selection algorithm in order to minimize the mutual inter-cell interference among Home Node Bs (HeNBs), aiming to improve the system throughput performance compared to the existing frequency reuse one scheme. The proposed algorithm is useful in Local Area (LA) deployment of the Long Term Evolution-Advanced (LTE-A) systems, where the HeNBs are expected...
In this paper we propose a mechanism to enable Flexible Spectrum Usage (FSU) in Local Area (LA) indoor deployment scenario of International Mobile Telecommunications-Advanced (IMT-A) with several operators in the given geographical area. The proposed scheme is referred to as policy assisted light Cognitive Radio (CR) enabled FSU, because it follows the CR cycle and considers policy as an important...
Currently International Telecommunications Union (ITU) is working on specifying the system requirements towards the next generation mobile communication systems called International Mobile Telecommunications-Advanced (IMT-A). This paper presents an overview on the technological requirements and current enhancements leading towards IMT-A. The relay nodes, support for higher bandwidth, local area indoor...
The main source of interference in OFDMA system in downlink is inter-cell interference, which can severely limit the throughput of users near the cell edge. The inter-cell interference coordination (ICIC) is one method to improve the performance. In this paper autonomous inter-cell interference avoidance schemes under fractional load (FL) conditions in the downlink for 3rd generation partnership project...
In this paper we propose a mechanism to enable flexible spectrum usage (FSU) in local area indoor deployment scenario with several operators in the given geographical area. The proposed scheme is referred to as policy assisted light cognitive radio (CR) enabled FSU, because it follows the CR cycle and considers policy as an important element to assist FSU. It facilitates allocation of spectral resources...
In this paper we propose a non-contention based mechanism for allocation of the spectral resources by several interfering Home e-NodeBs (HeNBs) deployed by the same or different operators, potentially in random manner in a given geographical area. The proposed mechanism facilitates allocation of spectral resources from a common pool based on the individual traffic requirements of the HeNBs, thereby...
The interaction between multicasting and real-time multimedia streams poses various new and interesting problems in research on communication protocols and architectures. For example, display systems of heterogeneous users in the same session may have different or even varying latency, display resolution, and/or processing capabilities. In this paper, we propose a receiver-oriented resource reservation...
Future wireless services are expected to provide data-rates in the order of 1 Gbps in local area and 100 Mbps in wide area. A very wide bandwidth is required to support such high rates, in the order of 100 MHz: this wideband will not be available for each operator, thus a shared access to the spectrum among operators is needed. An holistic approach to spectrum sharing is adopted in this paper: not...
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