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Displaying 1-29 out of 29 total
Notice of Violation of IEEE Publication Principles Research on Synchronous Low Power Listening for Collection Tree Protocol in WSN
Found in: 2010 Asia-Pacific Services Computing Conference (APSCC 2010)
By Jian Wan, Xin Luo, Xianghua Xu
Issue Date:December 2010
pp. 394-399
Data collection is the fundamental and important function in wireless sensor networks. Due to the restriction of node power, how to improve the node's energy efficiency and prolong the network lifetime is an important issue in practical network deployment....
 
Reprogramming over Low Power Link Layer in Wireless Sensor Networks
Found in: 2013 IEEE 10th International Conference on Mobile Ad-Hoc and Sensor Systems (MASS)
By Yi Gao, Chun Chen, Xue Liu, Jiajun Bu, Wei Dong, Xianghua Xu
Issue Date:October 2013
pp. 461-469
Reprogramming over the air is important for maintaining a wireless sensor network. Traditional reprogramming approaches assume always-on link layers. Given the energy limitation of sensor nodes, always-on link layers are often not desired for most sensor n...
 
Workload characterization on a production Hadoop cluster: A case study on Taobao
Found in: 2012 IEEE International Symposium on Workload Characterization (IISWC)
By Zujie Ren,Xianghua Xu,Jian Wan,Weisong Shi,Min Zhou
Issue Date:November 2012
pp. 3-13
MapReduce is becoming the state-of-the-art computing paradigm for processing large-scale datasets on a large cluster with tens or thousands of nodes. It has been widely used in various fields such as e-commerce, Web search, social networks, and scientific ...
 
WaxElephant: A Realistic Hadoop Simulator for Parameters Tuning and Scalability Analysis
Found in: 2012 Seventh ChinaGrid Annual Conference (ChinaGrid)
By Zujie Ren,Zhijun Liu,Xianghua Xu,Jian Wan,Weisong Shi,Min Zhou
Issue Date:September 2012
pp. 9-16
MapReduce is becoming the state-of-the-art computation paradigm for processing large-scale datasets on a large cluster with tens or thousands of nodes. Hadoop, an open-source implementation of MapReduce framework, has gained much popularity due to its high...
 
An Optimized Degree Strategy for Persistent Sensor Network Data Distribution
Found in: Parallel, Distributed, and Network-Based Processing, Euromicro Conference on
By Wei Zhang,Qinchao Zhang,Xianghua Xu,Jian Wan
Issue Date:February 2012
pp. 130-137
Nodes of wireless sensor networks (WSN) may fail easily due to the lack of energy or disaster scenarios. Such failures can severely reduce the persistence and collection efficiency of sensed data. Network coding technology can be employed to enhance the da...
 
Network Coding Data Collecting Mechanism Based on Prioritized Degree Distribution in Wireless Sensor Network
Found in: Embedded and Ubiquitous Computing, IEEE/IFIP International Conference on
By Wei Zhang,Xianghua Xu,Qinchao Zhang,Jian Wan,Naixue Xiong
Issue Date:October 2011
pp. 350-357
Wireless sensor network (WSN) is a typical distributed storage system, and network coding technology is developed to enhance the data persistence of WSN. However, the traditional distributed coding strategy may cause serious
 
A Comparative Investigation on Different P2P Search Systems in Dynamic Environments
Found in: ChinaGrid, Annual Conference
By Zujie Ren,Xianghua Xu,Jian Wan
Issue Date:August 2011
pp. 116-123
Recently, peer-to-peer (P2P) search technique has become popular in the Web as an alternative to centralized search due to its high scalability and low deployment-cost. Various P2P search systems have been proposed to support full-text search. However, P2P...
 
Resource Allocation in Contending Virtualized Environments through VM Performance Modeling and Feedback
Found in: ChinaGrid, Annual Conference
By Congfeng Jiang,Xianghua Xu,Jilin Zhang,Yunfa Li,Jian Wan
Issue Date:August 2011
pp. 196-203
With active deployment of virtualization in large scale data centers and cloud computing environments, allocation and scheduling of virtual and physical resources raise more challenges and may have negative impacts on system performance due to: (1) the iso...
 
Improve the Completeness of Passive Monitoring Trace in Wireless Sensor Network
Found in: Asia-Pacific Conference on Services Computing. 2006 IEEE
By Xianghua Xu, Chao Tong, Jian Wan
Issue Date:December 2010
pp. 560-566
The performance evaluation of wireless sensor network based on passive monitoring restricted by two respects: first, passive monitoring trace is incomplete, because monitors can not capture every transmission in the network. Second, the information directl...
 
MSNAP: Fault Tolerant Event Localization in Wireless Sensor Networks
Found in: Asia-Pacific Conference on Services Computing. 2006 IEEE
By Xianghua Xu, Xueyong Gao, Jian Wan
Issue Date:December 2010
pp. 541-547
This paper investigates event localization in wireless sensor networks. We improve the SNAP (Subtract on Negative Add on Positive) localization algorithm and propose the MSNAP (Modified Subtract on Negative Add on Positive) localization algorithm with high...
 
A Mutual Authentication Protocol for Low-Cost RFID System
Found in: Asia-Pacific Conference on Services Computing. 2006 IEEE
By Xueping Ren, Xianghua Xu
Issue Date:December 2010
pp. 632-636
In order to protect the privacy and the security of the tag, we propose a mutual authentication protocol for low-cost RFID system. The protocol ensures that the reader (or server) and the tag authenticate each other, provides the privacy and security prope...
 
Regulative Growth Codes: Enhancing Data Persistence in Sparse Sensor Networks
Found in: Asia-Pacific Conference on Services Computing. 2006 IEEE
By Xianghua Xu, Chao Shen, Jian Wan
Issue Date:December 2010
pp. 637-642
Growth Codes (GC) enhances the data persistence in dense sensor networks. However, GC exchanges data with neighbors in a completely random way, which may lead to uneven sensor data distribution in sparse sensor network. This significantly reduces the effic...
 
Power Aware Resource Allocation in Virtualized Environments through VM Behavior Identification
Found in: IEEE-ACM International Conference on Green Computing and Communications and International Conference on Cyber, Physical and Social Computing
By Congfeng Jiang, Jilin Zhang, Jian Wan, Xianghua Xu, Yuyu Yin, Ritai Yu, Changping Lv
Issue Date:December 2010
pp. 313-318
Virtualization technology enables server and service consolidation to save more power and operational costs of large scale computing systems. However, the consolidation nature of virtualization intensifies the power densities in a rack, thus resulting in h...
 
Java Multi Threaded Based Parallel Remote Sensing Image Interpretation in Desktop Grid
Found in: ChinaGrid, Annual Conference
By Congfeng Jiang, Xianghua Xu, Jian Wan, Jilin Zhang, Yunfa Li
Issue Date:July 2010
pp. 51-59
Typical remote sensing image interpretation consists of large number of long-lived independent computation jobs such as calibration, correction, and transformation and computation. These time consuming jobs are suitable for execution in desktop grid with h...
 
A Real-Time Scheduling Mechanism of Resource for Multiple Virtual Machine System
Found in: ChinaGrid, Annual Conference
By Yunfa Li, Xianghua Xu, Jian Wan, Wanqing Li, Youwei Yuan
Issue Date:July 2010
pp. 137-143
With the growth of hardware and software resources, the management of virtual machine system is becoming more and more difficult. It has become a very difficult problem that how to schedule the system resource in real time and improve the service performan...
 
Compression of Inverted Index for Comprehensive Performance Evaluation in Lucene
Found in: Computational Sciences and Optimization, International Joint Conference on
By Xianghua Xu, Shengyi Pan, Jian Wan
Issue Date:May 2010
pp. 382-386
Inverted index is the most popular index structure in search engine. Applying index compression can reduce storage space on inverted index, and improve the search performance. In this paper, we achieve comprehensive performance evaluation of three state-of...
 
A Utility-Based Adaptive Resource Allocation Policy in Virtualized Environment
Found in: Dependable, Autonomic and Secure Computing, IEEE International Symposium on
By Jian Wan, Peipei Shan, Xianghua Xu
Issue Date:December 2009
pp. 63-68
How to meet the QoS of the applications and improve resource utilization is an important problem in virtualized environment. In this paper, we propose a Utility based resource allocation policy with QoS constrained in virtualized environment. Firstly, we b...
 
Grey Prediction Control of Adaptive Resources Allocation in Virtualized Computing System
Found in: Dependable, Autonomic and Secure Computing, IEEE International Symposium on
By Xianghua Xu, Yanna Yan, Jian Wan
Issue Date:December 2009
pp. 109-114
In order to improve the resource utilization of virtual machine and control the resource allocation online effectively, in this paper, we present a grey prediction control model used for dynamic resource allocation in virtual machine as workloads changing....
 
RAS-M: Resource Allocation Strategy Based on Market Mechanism in Cloud Computing
Found in: ChinaGrid, Annual Conference
By Xindong You, Xianghua Xu, Jian Wan, Dongjin Yu
Issue Date:August 2009
pp. 256-263
Resource management is one of the main issues in Cloud Computing. In order to improve resource utilization of large Data Centers while delivering services with higher QoS to Cloud Clients, a resource allocation strategy based on market (RAS-M) is proposed....
 
Analysis and Evaluation of the Scheduling Algorithms in Virtual Environment
Found in: Embedded Software and Systems, Second International Conference on
By Xindong You, Xianghua Xu, Jian Wan, Congfeng Jiang
Issue Date:May 2009
pp. 291-296
Virtual machine technologies currently receive great interest both in industry and research communities. And it is one of the most important technologies for the coming Cloud Computing. We surveyed the CPU scheduling algorithms in Xen and VMWare systems, a...
 
Performance Evaluation of the CPU Scheduler in XEN
Found in: Information Science and Engieering, International Symposium on
By Xianghua Xu, Peipei Shan, Jian Wan, Yucheng Jiang
Issue Date:December 2008
pp. 68-72
Virtual machines with advances in software and architectural support have emerged as the basis for enterprises to allocate resources recently. One main benefit of virtual machine is server consolidation. However, flexible and complex consolidation results ...
 
Quantifying Performance Properties of Virtual Machine
Found in: Information Science and Engieering, International Symposium on
By Xianghua Xu, Feng Zhou, Jian Wan, Yucheng Jiang
Issue Date:December 2008
pp. 24-28
In this paper we present results from test and quantitative analysis of leading hypervisors Xen, Kvm and Vmware. Our test comparison was carried out using benchmarks which can performance on the Overall performance, performance isolation, and scalability o...
 
Energy Management for Microprocessor Systems: Challenges and Existing Solutions
Found in: Intelligent Information Technology Application Workshops, International Symposium on
By Congfeng Jiang, Xianghua Xu, Jian Wan, Xindong You
Issue Date:December 2008
pp. 1071-1076
Energy is a critical resource to not only mobile, wireless, and battery-powered devices, but also consumer PCs and large scale server system and data centers. High energy consumption results in more heat dissipations, cooling costs and makes servers become...
 
An Efficient Gradient Mechanism of Directed Diffusion in Wireless Sensor Network
Found in: Computational Intelligence and Security, International Conference on
By Jian Wan, Jianrong Wu, Xianghua Xu, Yanna Yan
Issue Date:December 2008
pp. 427-431
In Wireless Sensor Network (WSN), sensor node is limited in energy, thus energy efficiency is an important concern in routing protocol design. And some applications in sensor networks have the requirement of timely delivery, real-time also become needed fo...
 
An Enhanced Routing Protocol for ZigBee/IEEE 802.15.4 Wireless Networks
Found in: Future Generation Communication and Networking
By Xianghua Xu, Daomin Yuan, Jian Wan
Issue Date:December 2008
pp. 294-298
ZigBee is a well accepted industrial standard for wireless sensor networks based on IEEE 802.15.4. Since aiming for the application of low data rate, low price and low power consumption, ZigBee networks have the limited resources such as computation comple...
 
A Novel Fault Detection and Recovery Mechanism for Zigbee Sensor Networks
Found in: Future Generation Communication and Networking
By Jian Wan, Jianrong Wu, Xianghua Xu
Issue Date:December 2008
pp. 270-274
Wireless Sensor networks (WSN) are prone to cause failures due to the constraining factors of energy, memory and communication capability. This paper describes an efficient faulty detection and recovery mechanism for ZigBee network which is an industrial s...
 
An Efficient Self-Healing Scheme for Wireless Sensor Networks
Found in: Future Generation Communication and Networking
By Jian Wan, Wanyong Chen, Xianghua Xu, Miaoqi Fang
Issue Date:December 2008
pp. 98-101
The reliability of wireless sensor networks is affected by faults that may occur due to various reasons. In ZigBee sensor networks, ZigBee specification presents a self-healing process which relies on its tree topology. When a ZigBee node failed, all of th...
 
A Gradient Reconfiguration Mechanism of Directed Diffusion in Wireless Sensor Networks
Found in: Semantics, Knowledge and Grid, International Conference on
By Jian Wan, Jianrong Wu, Xianghua Xu, Miaoqi Fang
Issue Date:December 2008
pp. 287-292
In Wireless Sensor networks (WSNs), most existing routing protocols do not consider a node mobility problem, because nodes in sensor network are generally assumed to be static.The network may get partitioned, due to the mobility of some nodes will cause ot...
 
Workload Analysis, Implications, and Optimization on a Production Hadoop Cluster: A Case Study on Taobao
Found in: IEEE Transactions on Services Computing
By Zujie Ren,Jian Wan,Weisong Shi,Xianghua Xu,Min Zhou
Issue Date:April 2014
pp. 307-321
Understanding the characteristics of MapReduce workloads in a Hadoop cluster is the key to making optimal configuration decisions and improving the system efficiency and throughput. However, workload analysis on a Hadoop cluster, particularly in a large-sc...
 
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