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ISM: Intent-perceptible service migration model for IP network survivability

Tien Tzu Hsueh Pao/Acta Electronica Sinica 2011年第12期39卷 2768-2775页

作者： Zhao, Er-Hu Yang, Xiao-Long Xu, Jie Long, Ke-Ping Zhang, Dan Research Centre for Optical Internet and Mobile Information Networks University of Electronic Science and Technology of China Chengdu Sichuan 611731 China National Key Lab. of Integrated Information System Tech. Institute of Software Chinese Acad. of Sci. Beijing 100190 China School of Computer and Communication Engineering University of Science and Technology Beijing Beijing 100083 China 706 Institute The Second Academy of China Aerospace Beijing 100854 China

The existing service migration methods bring the server cluster heavy burden, and their time spending is so high that seriously affects the service continuity. In order to enhance the survivability of IP network services, the paper puts forward an intent-perceptible service migration model (ISM). In this model, we design a novel trigger mechanism and object selecting method for service migration, and make the service migration intention perceptible for the client with the cooperation of the server. The evaluation results show that ISM model can not only ensure the service invulnerability by maintaining a high randomness of service migration, but also improve the service continuity by reducing the service gap time spending on service migration to the maximum extent. Therefore, ISM model can enhance IP network survivability efficiently.

关键词： Internet protocols

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pService: Towards similarity search on peer-to-peer web services discovery

pService: Towards similarity search on peer-to-peer web serv...

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1st International Conference on Advances in P2P systems, AP2PS 2009

作者： Zhou, Gang Yu, Jianjun National Digital Switching System Engineering and Technological Research Center 450002 France State Key Lab. of Software Development Environment Beihang University 100191 China Computer Network Information Center Chinese Academy of Sciences 100190 China

ISBN: (纸本)9780769538310

We present the design of pService system for P2P Web services discovery supporting similarity earch with its locality-preserving feature based on modified Skip Graph. In pService, the most important property (e.g. service name) of a service is viewed as the indexing key of a peer node. The other properties are extracted as multiattributes which would be mapped into one-dimensional indices using HSFC (Hilbert Space Filling Curve), and assigned to membership vector of the peer node. These two features help to support similarity search in two aspects: peer nodes with similar indexing keys would be distributed neighborly, peer nodes with similar indices will connect to each other through routing table. Our evaluation showed that the pService performs considerable Web services discovery efficiency. © 2009 IEEE.

关键词： Web services

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A fine-grained localization scheme using a mobile beacon node for wireless sensor networks

A fine-grained localization scheme using a mobile beacon nod...

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2009 2nd International Conference on Computer Science and Its Applications, CSA 2009

作者： Liu, Kezhong Xiong, Ji Cui, Yongqiang Han, Dong School of Navigation Wuhan University of Technology Hubei Province 430063 China Intelligent Transport System Research Center Wuhan University of Technology Hubei Province 430063 China State Key Lab of Software Engineering Wuhan University Hubei Province 430000 China

ISBN: (纸本)9781424449460

In this paper, we present a fine-grained localization algorithm for wireless sensor networks using a mobile beacon node. The algorithm is based on distance measurement using RSSI. The beacon node is equipped with a GPS sender, a RF (radio frequency). Each stationary sensor node is equipped with a RF. The beacon node periodically broadcasts its location information, and stationary sensor nodes perceive their positions as beacon points. A sensor node's location is computed by measuring the distance to the beacon point using RSSI. Our proposed localization scheme is evaluated using OPNET 8.1 and compared with Ssu's and Yu's localization schemes. The results show that our localization scheme outperforms the other two schemes in terms of energy efficiency (overhead) and accuracy. © 2009 IEEE.

关键词： Sensor nodes

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Port embedded Linux to XUP Virtex-II Pro development board

Port embedded Linux to XUP Virtex-II Pro development board

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IEEE International Symposium on Information (IT) in Medicine and Education, ITME

作者： Qingguo Zhou Qi Yao Chanjuan Li Bin Hu Distributed & Embedded System Lab (DSLab) Lanzhou University China Engineering Research Center of Open Source Software and Real-Time Systems Ministry of Education Lanzhou University China

As its free, rich code resource and supporting many kinds of CPU architecture, Linux is making steady progress in the embedded arena. The Virtex-II Pro serials development system, produced by Xilinx company, provides an advanced hardware platform that consists of a high performance Virtex serials platform FPGA surrounded by a comprehensive collection of peripheral components that can be used to create a complex system and meet different special embedded application areas. This paper mainly introduces porting embedded Linux to the XUP Virtex- II Pro development system, and using serials of development tool kits. It is a good guide to develop embedded system with FPGA development system and Linux.

关键词： Linux Embedded system Field programmable gate arrays Hardware Kernel Embedded computing Computer architecture Power system reliability Open source software Computer applications

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A Case Study of Microkernel for Education

A Case Study of Microkernel for Education

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2009 IEEE International Symposium on IT in Medicine & Education(ITME2009)

作者： Nicholas McGuire Distributed & Embedded System Lab (DSLab) Lanzhou UniversityChina Engineering Research Center of Open Source Software and Real-Time Systems Ministry of EducationLanzhou UniversityChina

The paper will introduce a new operating system architecture microkernel for *** its safe,small,and flexible feature,micorkernel is becoming widely use in various *** it to education,will from different design architecture to make learner get deeper understanding of operating system *** is a real,second-generation microkernel whose source code is less than 15,000 lines,and it is freely available under the GNU General Public *** this paper,based on Fiasco,the microkernel operating system will be introduced especially in its kernel mechanism.

关键词： A Case Study of Microkernel for Education

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Design and implementation of smartphone edition based on embedded linux

Design and implementation of smartphone edition based on emb...

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10th International Conference on Advanced Communication Technology

作者： Kim, Do-Hyung Yun, Min-Hong Kim, Sun-Ja Lee, Cheol-Hoon Embedded SAV Research Division Electronics and Telecommunications Research Institute Dept. of Computer Engineering System Software Lab. Chungnam National University

ISBN: (纸本)9788955191356

The paper describes the design and implementation of Qplus Smartphone Edition based on embedded Linux. Existing Smartphone platforms entailed royalty expenses and had custornization difficulties due to the closure of their source codes. The Qplus Smartphone Edition requires no royalty because it is based on the embedded Linux. And, it supports key navigation functionality such as moving between folders or running applications with key-only operations. It also provides more user friendly environment through screen interfaces and indicators similar to those of the cellular phones.

关键词： linux qplus smartphone

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A Performance Evaluation of Vertical Hanover Architecture with Low Latency Handover

A Performance Evaluation of Vertical Hanover Architecture wi...

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International Conference on Convergence and Hybrid Information Technology

作者： Kim, Do-Hyung Kim, Won-Tae Lee, Hwan-Gu Kim, Sun-Ja Lee, Cheol-Hoon Convergence SW Research Division Electronics and Telecommunications Research Institute Dept. of Computer Engineering System Software Lab. Chungnam National University

ISBN: (纸本)9780769533285

This paper describes the vertical handover architecture with Low Latency Handover for mobile terminals which supports interworking between heterogeneous networks. The vertical handover architecture defines handover-related modules for mobile terminal and the handover switching flows among them. We adapt Low Latency Handover method to Mobile IP for reducing handover time. The architecture is designed to be easily extended to support more than two heterogeneous networks, so that it is easy to apply architecture to terminals that have multiple heterogeneous wireless network interfaces. We analyze the performance of handover method in terms of handover delay time using test bed system.

关键词： Heterogeneous networks

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An Extensive Empirical Study of automated evaluation of multi-document summarization

An Extensive Empirical Study of automated evaluation of mult...

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1st International Conference on Intelligent Networks and Intelligent systems, ICINIS 2008

作者： Wu, Ying-Qiang Gang-Zhou Qiu, Li-Qing State Key Lab. of Software Development Environment Beihang University 100191 National Digital Switching System Engineering and Technological Research Center 450002 China

ISBN: (纸本)9780769533919

This paper discusses an approach to automated evaluation of multi-document summarization by computing the similarities of automated summaries and human summaries and scoring the automated summaries by their similarities to the human ones. Several schemes are used in our experiment, as well as the effects of stop words and stemming. Our method experimental result is compared to Rouge which is based on n-gram. The test materials for experiments are from DUC 2005 corpus. The results show that our novel scheme produces acceptable results, and may avoid some defects of n-gram. © 2008 IEEE.

关键词： Automation

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BD-LZW picture compression algorithm for WSN system

BD-LZW picture compression algorithm for WSN system

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2008 3rd International Conference on Pervasive Computing and Applications, ICPCA08

作者： Jinlan, Zhan Qingguo, Zhou Shuwei, Bai Li, Cuihual Bin, Hu Li, Lian Department of Computer Science Video and Image Processing Lab Xiamen University China Engineering Research Center of Open Source Software and Real-time System Ministry of Education Department of Information Science and Engineering Lanzhou University China Department of Computing University of Central England United Kingdom

ISBN: (纸本)9781424420209

In the paper, a new parallel LZW-Like algorithm, bidirectory LZW algorithm (BD-LZW) will be interpreted The new algorithm can be used in data compression/decompression system which runs on multi-microprocessor system, such as CELL, which the algorithm will be implemented on. Different from the conventional parallel LZW algorithm with one input directory, BD-LZW algorithm allows two threads reading characters from two ends of string. By this method, the data can be partitioned for compression/decompression loading between two threads fairly and easily. The most important is the compression performance can be improved by the new algorithm. Comparing running time, it's lower 10% than conventional parallel LZW (P-LZW) algorithm when there are two threads running on CELL architecture. © 2008 IEEE.

关键词： Compression algorithms Wireless sensor networks Yarn Partitioning algorithms Image coding Data compression Video compression Image processing Computer science Open source software

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Is Free-software Open-Source ready for Medical Applications?

Is Free-Software Open-Source ready for Medical Applications?

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2008 IEEE International Symposium on IT in Medicine and Education(ITME 2008)

作者： Nicholas Mc Guire Distributed & Embedded System Lab(DSLab) Lanzhou UniversityChina Engineering Research Center of Open Source Software and Real-Time Systems Ministry of EducationLanzhou UniversityChina

While in the past years free-software has gained some acceptance in the domain of medical applications it has been mainly focused on quite typical IT-infrastructure cases -may that be billing systems,data warehousing,databases and content management systems a second area where free software has made prominent entrance has been in the area of imaging and high-volume data *** the area of medical devices,with rare exceptions,free-software is still quite underrepresented -in part due to acceptance but in part also due to plain technical ***/Linux,real-time and embedded variants and many free-software projected have made there way into medical applications -but is Free-software ready to cover the wide area of demands on medical platforms and there applications? The demands of medical platforms stretch more or less the entire range of computational capabilities: * battery powered -robust against power-failures * reliable in rough environment * compliant with safety regulations * robust and secure software platforms * standalone,networked all the way to clusters * extensibility for specialized hardware and software * from head-less to multithread graphical user-interfaces And all this for devices that sometimes only will be built in a few 10s or hundred devices? What advantages could free-software have here -what limitations are there -where do we still need to do *** software is not the answer to all problems in medical computing (or in any other area) -but it has a plethora of innovative and powerful solutions to *** will outline some of them along with some outstanding medical applications that have been built on free-software components.

关键词： Is Free-software Open-Source ready for Medical Applications

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