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Energy-aware task allocation over MANETs

Energy-aware task allocation over MANETs

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IEEE international conference on Wireless and Mobile computing, networking And Communications (WiMob)

作者： W. Alsalih S. Akl H. Hassanein School of Computing Queen's University Kingston ONT Canada

Since the emergence of mobile computing, reducing energy consumption of battery-operated computing devices has become a very active research area. The widespread popularity of mobile computing devices, such as laptops, handheld devices and cell phones, motivates this research area. Several hardware based techniques have been proposed; this has led to more energy-efficient systems. Nevertheless, it is presumed in the literature of energy-aware design that software based techniques have the potential to reduce energy demand and contribute to solve the problem. In this paper, we look into the problem of distributing computational tasks amongst a set of mobile computing devices in a mobile wireless ad hoc network (MANET) in such a way that reduces the total consumed energy. In such a distributed environment, the assignment of computational tasks to different devices plays a vital role in energy conservation. The main contributions of this paper are formulating a novel energy-aware allocation problem and proposing a heuristic-based greedy algorithm to solve it approximately. Our allocation algorithm assigns a set of computational tasks, which may communicate with each other, into a set of heterogeneous processors in such a way that minimizes the total consumed energy. Experiments show that our algorithm is near-optimal in most of the tested benchmarks.

关键词： Mobile computing distributed computing Handheld computers Computer networks Mobile ad hoc networks Energy consumption Portable computers Cellular phones Hardware Energy efficiency

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An Approach to Middleware Specialization for Cyber Physical Systems

An Approach to Middleware Specialization for Cyber Physical ...

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international conference on distributed computing Systems Workshop

作者： Akshay Dabholkar Aniruddha Gokhale Department of EECS Vanderbilt University Nashville TN USA

Contemporary computing infrastructure, such as networking stacks, OS and middleware, are made up of layers of software functionality that have evolved over decades to support the broadest range of *** feature-richness and the layers of functionality, however, tend to be excessive and a source of performance overhead for cyber-physical Systems (CPS). Yet it is necessary to leverage the decades of proven patterns and principles in these infrastructures. This paper presents an approach to systematically specialize general-purpose middleware used to host CPS. Our approach is based on the principles of feature-oriented software development (FOSD), which requires deducing an algebraic structure of contemporary middleware based on a higher level of abstraction of features. The paper showcase how Origami matrices and generative programming can play a key role in realizing the specializations. The paper concludes by delving in to future open areas of middleware specialization research.

关键词： Middleware Application software Programming Automation distributed computing USA Councils Costs Quality of service Constraint optimization conferences

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DHA-KD: Dynamic Hierarchical Agent Based Key Distribution in Group Communication

DHA-KD: Dynamic Hierarchical Agent Based Key Distribution in...

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ACIS international conference on Software Engineering, Artificial Intelligence, networking, and Parallel/distributed computing (SNPD)

作者： M. Amir Moulavi Jalal A. Nasiri Behnam Bahmani Hossein Parvar M. Sadeghizadeh Mahmoud Naghibzadeh Networking Department Information Technology Services (ITS) Center Ferdowsi University of Mashhad Iran Computer Engineering Department Ferdowsi University of Mashhad Iran Computer Engineering Department Islamic Azad University Firoozkooh Iran Department of Computer Engineering Islamic Azad University of Mashhad Iran

ISBN: (纸本)9780769532639

Confidentiality is one of the most nontrivial issues in secrecy of group communication. In order to satisfy confidentiality, symmetric cryptography must be exploited. All symmetric algorithms require a shared key between the members of group. High frequency in the number of joins and leaves of members can cause huge number of messages of data between authorized group members. Although hierarchical group communication is a prominent model, it has not been investigated in security literature as well as other models. There has been an extensive research on satisfying confidentiality in group communications on different architecture other than the hierarchical architecture and the proposed hierarchical models do not use the concept of agents. A concept that brings its own advantages. In this paper, we investigate a new approach to secure key management in hierarchical group communication by means of using intelligent agents. The simulation results show that using agents reduce network bandwidth and improve and achieve more performance comparing with other models. Moreover, using agents makes the architecture more flexible and dynamic preparing it for grid computing technologies.

关键词： Bandwidth Degradation Probes Cryptography Computers Load modeling Nominations and elections

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Lightweight distributed Method for Connectivity-based Clustering Based on Schelling's Model

Lightweight Distributed Method for Connectivity-based Cluste...

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international conference on Advanced Information networking and Applications Workshops (AINAW)

作者： Sho Tsugawa Hiroyuki Ohsaki Makoto Imase Graduate School of Information Science and Technology Osaka University Suita Osaka Japan

ISBN: (纸本)9781467308670

In the literature, there exist connectivity-based distributed clustering methods called CDC (Connectivity-based distributed node Clustering scheme) and SDC (SCM-based distributed Clustering). CDC and SDC have mechanisms for maintaining clusters against nodes join and leave, but both methods do not assume frequent changes in the network topology. In this paper, we propose a lightweight distributed clustering method called SBDC (Schelling-Based distributed Clustering), which is inspired by Schelling's model -- a popular segregation model in sociology. We also evaluate the effectiveness of our proposed SBDC in environment with frequent changes in the network topology. Our simulation results show that SBDC outperforms CDC and SDC under frequent changes in the network topology caused by high node mobility.

关键词： Accuracy Network topology Color Peer to peer computing Clustering methods Measurement Ad hoc networks

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Efficient and Customizable Top-k Query on Named Data networking

Efficient and Customizable Top-k Query on Named Data Network...

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IEEE international Symposium on Parallel and distributed Processing with Applications and IEEE international conference on Ubiquitous computing and Communications (ISPA/IUCC)

作者： Zhuhua Liao Zengde Teng Jian Zhang Yizhi Liu Jianxun Liu College of Computer Science and Engineering Hunan University of Science and Technology Xiangtan China

ISBN: (纸本)9781538637913

Offering a flexible paradigm for efficient data discovery is a crucial requirement in large information-centric networks. However, a major hindrance to query data in multicast networks is the uncertain sources and crowds of answering, which causes heavy network traffic and unduly long response time. In this paper, we present an efficient and customizable top-k query processing architecture, called NDN-Qk, by leveraging the emerging named data networking (NDN). NDN-Qk provides a completely ad-hoc and flexible query paradigm and enables the forwarders that distributed on NDN to cooperatively discover and aggregate the relevant top-k data. Specifically, we present adaptive types and strategies of data aggregation, and response completeness discerning algorithm for efficiently aggregating multiple top-k answers in NDN. Moreover, we further introduce a customizable query solution for adjusting the scale, score and range of response data in NDN-Qk. Finally, our comprehensive experimental evaluations demonstrates the effectiveness of our top-k query processing solutions and the performance of our proposed algorithms.

关键词： distributed databases Telecommunication traffic Query processing Protocols Time factors distributed processing Data models

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A lightweight inter-user interference mitigation method in Body Sensor Networks

A lightweight inter-user interference mitigation method in B...

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IEEE international conference on Wireless and Mobile computing, networking And Communications (WiMob)

作者： Wen Sun Yu Ge Wai-Choong Wong Department of Electrical and Computer Engineering National University of Singapore Singapore Networking Protocols Department Institute for Infocomm Research Singapore

Body Sensor Networks (BSNs) enable continuous and remote health monitoring in medical applications. Inter-user interference is the major cause that deteriorates the reliable data transmission in BSNs when multiple BSNs are transmitting simultaneously in close proximity to one another. This paper presents an inter-user interference mitigation (IIM) method, which enables BSNs to adaptively reschedule their transmissions or switch to another channel in a distributed manner based on the detected information from neighboring BSNs. By taking advantage of the general property of the low channel utilization of BSNs in typical medical applications, the proposed IIM method increases system utilization and thus alleviates inter-user interference. In addition, our IIM method operates in a distributed manner without the need of extra infrastructure as compared to other approaches. In this paper, we describe the detailed design of the IIM method, and provide performance comparisons through simulations. The simulation results indicate that with the proposed IIM method, the network throughput is improved by 30% on average, and the energy consumption for data transmission is reduced by 16%.

关键词： Interference Schedules Switches Delay Brain modeling Protocols Data communication

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The Application of EVT-Copula in Operational Risk Quantification

The Application of EVT-Copula in Operational Risk Quantifica...

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international conference on Wireless Communications, networking and Mobile computing (WiCom)

作者： Liqin Hu Hongfeng Peng Economics & Management School Wuhan University Wuhan China Economics& Management School Wuhan UniversityWuhan China

As the operational risk of Chinese banks becomes increasingly outstanding, we need urgently to find out a accurate measurement method. This article takes one commercial bank as an example, analyses the tails' characteristics of three types of operational risk loss event. It measures the fat-tail and light-tail loss by the POT model of EVT and logarithm normal model. Since the operational risk sample is small, it estimates with Bayesian inference based on MCMC, meanwhile it uses t-Copula and normal Copula function to aggregate each kinds of operational risk and gets the distribution of total operational risk It turns out that, when estimate in this way, the result is more stable, smaller and reliable.

关键词： Loss measurement Frequency Risk management Aggregates Risk analysis Business Environmental management Current measurement distributed computing Contracts

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distributed Task Scheduling in Heterogeneous Fog Networks: A Matching with Externalities Method

Distributed Task Scheduling in Heterogeneous Fog Networks: A...

引用

international conference on computing, networking and Communications (ICNC)

作者： Zening Liu Kunlun Wang Ming-Tuo Zhou Ziyu Shao Yang Yang SHIFT School of Information Science and Technology ShanghaiTech University Shanghai China

ISBN: (数字)9781728149059

ISBN: (纸本)9781728149066

Fog computing shows great potential advantages over legacy cloud computing in terms of latency and efficiency. While it also poses huge challenges in task scheduling and resource allocation, which are key to reap the full benefits of fog computing. Facing the new characteristics of fog computing, distributed task scheduling and resource allocation algorithms are necessary but challenging, which will be investigated in this paper. To minimize the latency in a distributed manner, a many-to-one matching game with externalities is formulated for task scheduling problems in fog networks, considering the inter-dependency among tasks in both communication and computation. Further, a distributed algorithm called distributed Two-sided Stable Task Scheduling (DTS2) algorithm is proposed to find a two-sided exchange-stable solution. Analytical and simulation results show that the proposed DTS2 algorithm can converge to a sub-optimal two-sided exchange-stable solution with low-complexity. Specifically, the DTS2 algorithm can greatly reduce the service delay than the one-sided stable matching. Besides, it can offer sub-optimal performance in system average delay but serve more users, compared with the optimal solution.

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Key Space of Cryptosystem Based on Chebyshev Polynomials over Finite Field

Key Space of Cryptosystem Based on Chebyshev Polynomials ove...

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international conference on Wireless Communications, networking and Mobile computing (WiCom)

作者： Zhihui Li Yidong Cui Yuehui Jin Huimin Xu Beijing University of Posts and Telecommunications Beijing Beijing CN Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education Beijing University of Posts and Telecommunications China School of Information and Communication Engineering Beijing University of Posts and Telecommunications China

A recently proposed public key cryptosystem based on Chebyshev polynomials suggests a new approach to data encryption. The sequence of Chebyshev polynomial is proved to be periodically, but its symmetry properties have not been investigated in depth. In this paper, a new representation of Chebyshev polynomial is introduced to study these properties, and their impacts on the cryptosystem. It is shown that the factual private key space of the cryptosystem is only half or quarter of the period of Chebyshev polynomial sequence. Proper parameters should be chosen to ensure the security of the cryptosystem.

关键词： Polynomials Chebyshev approximation Public key cryptography Encryption

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Applicability analysis of grid security mechanisms on cloud networking

Applicability analysis of grid security mechanisms on cloud ...

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international conference on Cloud and Service computing (CSC)

作者： Rasib Hassan Khan Miika Komu Tuomas Aura Department of Computer Science and Engineering School of Science and Technology Aalto University Finland

Grid computing has been around for quite a while. It facilitates utilization of distributed resources and has been extremely popular in its implementation. Grids have evolved enough to secure their operational architecture. On the other hand, cloud computing offers more recent alternative in distributed virtualization of resources, providing an on-demand architecture with a simple model for service charges. However, cloud computing is still struggling with different approaches to secure its operations. This paper discusses the security mechanisms in grid and cloud computing, and based on the current implementations in grid security, proposes a simple architecture for secured access control and policy enforcement system for cloud networks.

关键词： Cloud computing conferences

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