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Today's extreme-scale science applications involve the processing of bandwidth-intensive scientific workflows consisting of several inter-dependent tasks executing on heterogeneous clusters of computational resources and storage resources, which are interconnected by high-speed networks. An important challenge in such applications is the joint scheduling of computational, storage, and network resources...
In this paper, a new joint scheduling and hybrid resource allocation method is derived and investigated for a multi-user downlink Orthogonal Frequency Division Multiple Access (OFDMA) system that provides Time Delay-Sensitive services (TDS) and Time Delay-Insensitive services (TDI). A three sectored multi-cellular heterogeneous traffic environment is considered where users are randomly distributed...
In this paper, we propose a new 802.16 Qos scheduling architecture based on GPSS, integrating some kinds of existing scheduling algorithms. Then we design a simulation experiment to validate the effectiveness of the Qos scheduling architecture using Anylogic. The simulation results prove the new QoS architecture is effective, which can not only meet the delay requirement of real time applications,...
In current high bandwidth-delay-product networks, traditional end-to-end network protocols cannot guarantee the fair allocation of network resources (i.e., a rogue source that sends at an uncontrolled rate can seize a large fraction of the buffers at an intermediate router which results in dropped packets for other connections). Fair-queuing (FQ) algorithms were proposed to overcome this drawback...
In OFDMA systems, reducing the inter-cell interference among adjacent cells is a very important issue especially for the cell-edge users. In this paper, we propose a distributed algorithm that maximizing the system total throughput considering proportional fairness. In our proposed algorithm, the frequency resources in each cell is divided into high and low power regions. The bandwidth allocations...
This paper proposes a novel dynamic bandwidth allocation method based on a new switch technology named Ethernet-oriented physical frame timeslot switching (EPFTS). Based on the features of EPFTS, the bandwidth allocation is changed to quota allocation for manageable quality of service (QoS). The proposed method is composed of a quota allocation strategy and a dynamic quota scheduling policy called...
In this paper, we investigate scheduling for information management and dissemination in a multi-mission network. Dynamic network resource scheduling plays a crucial role in tracking critical engagement in battlefield and thus is highly demanded in multi-mission systems. Our focus is on how to resolve bandwidth contention in a heavily loaded network where mission requests surpass available bandwidth...
With the rapid proliferation of hardware devices, cluster computing has encountered the problem of heterogeneous resources. We have constructed a multi-cluster system that works with and without storage devices, and evaluated the system performance. We dispatch jobs with the strategy we propose to make the best use of system resources. In this paper we introduce this new scheduling system based on...
Evolved UTRA (EUTRA) is currently under standardization within 3GPP as a long-term evolution (LTE) of universal terrestrial radio access (UTRA) air interface. Due to the potentially large number of VoIP users served in this system, related control signaling overhead for VoIP transmissions with traditional full dynamic scheduling scheme could become a bottleneck and limit the system capacity to a greater...
We investigate the problem of finding minimum-distortion policies for streaming delay-sensitive but distortion-tolerant data. We consider cross-layer approaches which exploit the coupling between presentation and transport layers. We make the natural assumption that the distortion function is convex and decreasing. We focus on a single source-destination pair and analytically find the optimum transmission...
As Grid networks grows, the complexity of resource management in Grid networks dramatically increases. To manage the Grid resources efficiently, policy based resource management system is suitable. However, the policy which made at a moment could not be appropriate to other time because the condition of the grid resources with time space changes. Thus, in this paper, we propose asynchronous policy-based...
This paper explores the attributes, layering models and objective functions in cross layer designs for mobile ad hoc wireless networks by taking all the statistical characteristics and constraints from the physical (PHY) layer, media access control (MAC) layer and network (NET) layer into consideration. This paper reviews the entire network optimization across all the PHY/MAC/NET layers. At the PHY...
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