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To deal with the problem that cognitive information and queuing information are not both taken into account when performing Resource Allocation (RA), we have proposed a cross-layer RA scheme in a multiuser cognitive system with Orthogonal Frequency Division Multiple Access (OFDMA). In this scheme, we assume that several crucial factors influence the RA decision, including subchannel occupancy state,...
Overlaying low-power, low-cost, femtocells, over existing wireless networks has recently emerged as a means to significantly improve the coverage and performance of next-generation wireless networks. While most existing literature focuses on spectrum sharing and interference management among non-cooperative femtocells, in this paper, we propose a novel cooperative model that enables the femtocells...
The license management is one of the main concerns when Independent Software Vendors (ISV) try to distribute their software in computing platforms such as Clouds. They want to be sure that customers use their software according to their license terms. The work presented in this paper tries to solve part of this problem extending a semantic resource allocation approach for supporting the scheduling...
Coordinated beamforming for intercell interference management in multicell networks is considered. The base stations are equipped with multiple antennas, while the mobile terminals only have a single antenna. The base stations perform beamforming, user group selection, and scheduling operations. A mobile terminal can be served from multiple base stations, which requires advanced receiver techniques,...
In this paper we present a distributed event driven middleware architecture for situational awareness and intelligent decision making for command and control of geographically distributed networked battlefield agents. We tackle the important and challenging issues of distributed agents scheduling, synchronization, load balancing, and terrain database distribution/management/allocation in a distributed...
Uplink scheduling for relay stations in mobile multi-hop relay network has not been widely addressed in the literature under common belief that downlink traffic overwhelms uplink traffic. Recently, data traffic from user created content (UCC) is rapidly growing with a potential to create a huge amount of uplink (UL) traffic. Overlapped resource allocation in uplink transmission allows MSs attached...
Cellular network capacity and coverage can be improved by deployment of low power base stations referred to as picocells. Due to the associated deployment cost, a large number of picocells challenges the traditional approach to backhaul, where each cell has a dedicated backhaul link. This paper considers a more efficient approach, in which the backhaul is provided over a wireless channel shared among...
Virtualization technologies radically changed the way in which distributed architectures are exploited. With the contribution of VM capabilities and with the emergence of IaaS platforms, more and more frameworks tend to manage VMs across distributed architectures like operating systems handle processes on a single node. Taking into account that most of these frameworks follow a centralized model --...
In this paper, we propose a channel and queue aware cross-layer algorithm for allocating power and sub-carriers to users in Orthogonal Frequency Division Multiple Access (OFDMA) networks. Our algorithm uses utility to build a bridge between the physical layer and upper layers and also to balance the efficiency and fairness of the radio resource allocation. The objective is to develop a method based...
In future fourth generation wireless networks OFDM and MIMO techniques will be heavily exploited to provide connectivity to heterogeneous users offering different data traffic types. This paper proposes a low complexity resource allocation strategy for MIMO-OFDMA (Multiple-Input Multiple-Output Orthogonal Frequency Division Multiple Access) broadcast channel to support delay-sensitive traffic with...
In parallel and distributed systems, optimal task scheduling and load balancing has always been of great interest in order to minimize the time and speed up the process which plays a major role in the efficiency of such systems. By load balancing we mean scheduling the jobs in a way that every job could be executed concurrently while it is mapped to a processing unit, such as a processor (in a multi-processor...
Modern wireless networks, such as WiMAX or LTE are using OFDM/OFDMA as the enabling technologies for broadband transmission in cellular environments with QoS capabilities. In these networks, such schema as radio resource management, admission control, scheduling are essential. In this article we firstly introduce a Time-Frequency Burst Mapping algorithm for radio resource management that improves...
The objective of the work is to propose a resource discovery model for distributed resources using grid brokering and dispute solving techniques in a grid environment. The synchronization between local and external schedulers and the effective utilization of the available resources can be achieved by dispute solving with periodical resource auditing processes by an agent technique. The discovery of...
We consider a class of constrained queuing network called switched networks, important sub-class of the stochastic processing network (cf. Harrison (2000)), in which there are constraints on which queues can be served simultaneously. Such networks have served as effective models for understanding various types of dynamic resource allocation problems arising in communication networks like the Internet,...
RT-GRIS, our grid portal, has two purposes. One is effective CPU scavenging and other is supporting a great number of grid node. CPU-scavenging, cycle-scavenging, cycle stealing or shared computing creates a “grid” from the unused resources in a network of participants. It is an important technique for a distribution of grid job and node resource. And, if the grid portal uses fewer resources, those...
In a wireless domain where a mobile user accesses heterogeneous wireless technologies with multiple interfaces, a multi-path scheduling algorithm can benefit mobile users' experience by aggregating different network bandwidth together. However, existing literature actually shows that for TCP flows, it may not be the case. To better exploit multi-path scheduling for TCP connections, this paper presents...
Mobile WiMAX's scheduling service is a key factor in Radio Resource Management (RRM) in realizing Quality of Service (QoS). The choice in scheduling algorithm for Mobile WiMAX base stations, albeit outside of the scope of the standard, critically impacts the performance and robustness of Mobile WiMAX networks. This paper provides an in-depth study of four major scheduling algorithms: Round Robin (RR),...
In this work, we propose an integrated task allocation and scheduling mechanism to minimize the resource contention and the processing latency for application running on the SegBus platform. The transactions are classified as local and cross border SPLIT transactions. The hybrid scheduling approach implemented by hierarchal arbiter code structure shows significant improvement in system performance...
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...
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