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This paper investigates the energy efficient resource allocation for OFDM relay networks, where K users receive information via L helping relays. For such a system, an optimization problem is formulated to maximize the system energy efficiency (EE) by jointly optimizing the relay selection, subcarriers assignment and power allocation under the proportional rate constraints and available power constraint...
A novel framework is proposed for optimal resource management in multi-input multi-output (MIMO) downlink systems with smart-grid capabilities. Practical models are put forth to account for the stochastic renewable energy sources (RES), dynamic energy prices, as well as random wireless channels. Capitalizing on these models, a resource allocation task is formulated as an optimization problem that...
With more parallel and distributed applications moving to Cloud and data centers, it is challenging to provide predictable and controllable resources to multiple tenants, and thus guarantee application performance. In this paper, we propose an integrated QoS-aware resource provisioning platform based on virtualization technology for computing, storage and network resources. Coarse-grained CPU mapping...
This study mainly focuses on comparison of multi-robot task allocation problem and evaluation of corresponding solutions. Auction has been used in the problem widely. Various kinds of auction have been proposed previously. In this paper, we compare three auction-based algorithms applied in the task allocation problem from different aspects. In addition, an incremental variant is adopted in the parallel...
As discovered in our previous benchmark works, a small number of workloads in PARSEC benchmark suite suffer from heavy performance loss in a virtual execution environment, of which the major loss exhibits fairly a strong connection with the thread synchronization operations. This paper examines one workload of this kind that makes heavy use of thread synchronization operations, and shows the performance...
MAC (Media Access Control) protocols for wireless Ad hoc networks with directional antennas have been studied to increase network capacity for years, since directional antennas can offer long-range communications and enhance the possibility of spatial multiplexing. This paper proposes a TDMA (Time Division Multiple Access)-based MAC algorithm with directional antennas, which is named SDVCS (Slotted...
Many-task computing (MTC) is a computing paradigm widely used in scientific area. Each MTC job consists of up to millions of independent tasks. The primary strategy of improving MTC efficiency is to execute different tasks on parallel computing resources. Some MTC applications are data-dependent. For such an application, some specified data resource is required by every task; hence access to the data...
In this paper, we analyze the conventional unequal erasure protection (UXP) scheme for scalable video transmission, and propose a dynamic hybrid UXP/ARQ transmission framework to improve the performance of the conventional UXP method for bandwidth-constrained scalable video transmission. This framework applies automatic retransmission request (ARQ) to the conventional UXP scheme for scalable video...
In our prior work, we proposed the IQ-ASyMTRe architecture with a measure of information quality to reason about forming coalitions in multirobot tasks. The formed coalitions are guaranteed to be executable, given the current configurations of the robots and environment. A cost and a quality measure are associated with each coalition to further determine its utility for the task. In this paper, we...
To improve the performance of a relay system with multiple channels, the following issues should be addressed. Namely, how to allocate the power at source and relay to subchannels, how to pair subchannels of the first and second hops, and which users should be scheduled to which subchannel pair. Considering these issues in the design of an optimal joint resource allocation scheme in orthogonal channels,...
In this paper we study the problem of relay-enhanced cell (REC) coverage for which relay location is optimized to maximize the achievable REC radius. The problem is investigated for both Rayleigh and Rician relay fading channels, under a pre-determined user's outage probability constraint. We propose a statistical approach to formulate the problem and develop an optimization algorithm for it. The...
In this paper, we will study the joint problem of power allocation, relay selection and subchannel pairing in OFDM based amplify-and-forward multiple relays system. The optimization problem of maximizing system capacity under joint power constraint at source and relays is firstly formulated. Then, based on Lagrangian dual method, an optimal algorithm to the problem is derived with high SNR assumption...
H.264/AVC scalable video coding (SVC) is an upto-date video compression standard. This paper deals with the issue of transmitting H.264 scalable video bitstreams over wireless fading channels. The contribution is twofold: Firstly, to exploit the importance of prioritized video packets in different temporal layer, quality layer and group of pictures (GOP), a simple and accurate performance metric,...
In this paper we consider the joint resources allocation in multiple channels single non-regenerative (AF) relay systems. Firstly, the optimization problem of maximizing system capacity under joint power constraint at source and relay is formulated. We adopt Lagrangian dual method to derive the optimal centralized algorithm. Through the analysis it is proven an efficient and computational tractable...
Power allocation, relay selection and subchannel pairing are three important issues in OFDM based relay wireless systems to improve the system performance and reliability. In this paper, we will propose a joint power allocation, relay selection and subchannel pairing algorithm. The goal of the algorithm is to maximize the system capacity under the constraint of overall power at both source and relay...
This paper proposes a novel Differentiated Domain Protection (DDP) algorithm to address survivability in multi-domain optical networks. In order to ensure the principle of transparent management in multi-optical domains, DDP abstracts the multi-domain optical networks to Virtual Topology Graph (VTG) to solve the inter-domain routing. In order to satisfy the survivable requirements of different domains,...
In this paper, we propose a new algorithm, enhanced differentiated services protection (EDSP), to satisfy the multiple services grades under multi-link failures in WDM optical networks. We consider three services grades, i.e., diamond grade, golden grade and economy grade. For demand with economy grade, EDSP only computes a primary path and does not consider protection. For demand with Golden grade,...
This paper proposes a new survivable algorithm, enhanced shared-path protection (ESPP), to tolerate multi-link failures in WDM optical networks. In ESPP, we consider the load balancing to reduce the blocking probability, use resources sharing to save backup resources, and perform recovery escalation to carry the affected traffic. Compared with the conventional algorithm, ESPP has better resource utilization...
Notice of Violation of IEEE Publication Principles"Large-scale Multi-robot Task Allocation Based on Ant Colony Algorithm"by Yu Zhang, Shuhua Liu, Jie Liu, Chenmu Yu in the Proceedings of the Chinese Control and Decision Conference, July 2008 After careful and considered review of the content and authorship of this paper by a duly constituted expert committee, this paper has been found to...
With the regard of trailer scheduling problem, the hybrid flow shop problem with blocking (HFS-B) was introduced to analyze the flow of container with different attributes (import container, export container) in order to describe and optimize trailer scheduling problem. The mathematics model that was described using HFS-B with attribute for trailer scheduling problem was setup. The four section chromosomes...
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