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Communication-aware virtual machine placement with conict-avoidance in data centers

Journal of Computational Information Systems 2012年第15期8卷 6219-6299页

作者： Sun, Xin Xu, Peng Shuang, Kai Su, Sen State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

Virtualization provides a flexible and operable way to assign multi-tier applications in modern data centers by packing the application components into variable Virtual Machines (VMs). However, existing VM placement mechanisms just focus on infrastructure utilization or traffic balance, which may result in wasteful consumption of network and constraints violation. Therefore, a practical problem is that in the process of placing VMs, we need to consider not only keeping the server consolidation as a precondition, but also taking interdependencies and inter-communication patterns among VMs into condition. To address these issues, we formulate the joint optimization of server consolidation oriented and communication-aware VM placement as a variant of Quadratic Assignment Problem (QAP) in this paper. A novel and computationally efficient scheduling mechanism is proposed to (1) achieve maximum utilization of infrastructure resource of physical servers and (2) lower the network consumption, namely the total communication cost, according to both the transmission patterns among VMs and underlying network topology. The simulation results indicate that our proposed scheme not only improves the global resource utilization of physical machines by reducing the number of activated servers, but also decreases the stress of heavy network traffic transmitting remarkably compared to a well known VM assignment algorithm. © 2012 Binary Information Press.

关键词： Virtual machine

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Lexical analysis based on combining senses in ontology matching

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2012年第8期40卷 1624-1630页

作者： Liu, Xiu-Lei Liao, Jian-Xin Zhu, Xiao-Min Yang, Di Xu, Tong State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China EBUPT Information Technology Ltd. Beijing 100191 China

The paper presents a lexical analysis algorithm based on combining senses of words for computing subsumption relations between entities in ontology matching. It firstly finds the suitable sense of each word and extends it;then formally defines the representation of an entity notion based on semantic elements;finally, infers subsumption relations between all possible pair of entities, one from each of two ontologies. The experiments, over four real in use ontologies, show that the algorithm helps to increase the recall of the system.

关键词： Ontology

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Effect of the imperfect channel state information on the spectrum sharing cognitive relay networks

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Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information technology 2012年第6期34卷 1463-1468页

作者： Chen, Jun-Jie Si, Jiang-Bo Li, Zan Shi, Sha Huang, Hai-Yan State Key Lab. of Integrated Services Networks Xidian University Xi'an 710071 China State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

In spectrum sharing cognitive relay networks, due to the presence of imperfect Channel state Information (CSI), the interference from the secondary user can be higher than the maximum allowable interference level at the primary user and affect the primary user's reliable communication. In order to quantify the impact of the secondary user's interference on the primary user, a performance metric termed as interference probability is proposed. The closed-form expressions for interference probability of Opportunistic Relaying (OR) and Selection Cooperation (SC) are derived with imperfect CSI. It is shown that, in terms of the interference probability, the SC is better than the OR. However, the limit interference probability of the OR is identical to that of the SC. Moreover, with imperfect CSI, for both the SC and the OR, increasing the number of relays means a higher interference level on the primary user. Finally, simulation results are presented to verify the analysis.

关键词： Channel state information

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A novel host mobility support method in IPv4/IPv6 network of RANGI architecture

A novel host mobility support method in IPv4/IPv6 network of...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Yichen Jia Xuan Lu Wendong Wang Xiangyang Gong Xirong Que State Key Lab of Networking & Switching Technology Beijing University of Posts and Telecommunications Beijing China

With the growing demand of the host mobility, the problems of overloading of IP address semantics are becoming increasingly serious. People have figured out various ID/Locator split technologies to support host mobility. In fact, current network environment is still in mixed IPv4/IPv6 transition phase, but the existing technology for host mobility in this transition phase is not considered comprehensively. In this paper, we propose a novel method to support host mobility between IPv4 and IPv6 network, and give a detailed explanation through a new ID/Locator split architecture which called RANGI (Routing Architecture for the Next Generation Internet). There are two contributions in this method: First, it supports the host mobility in transition phase; second, it is like the host mobility means in IPv6, so it provides a good capacity of smooth transition from IPv4 to IPv6.

关键词： IP networks Mobile communication Protocols Servers Analytical models Mobile computing Hip

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S-LRU: A Cache Replacement Algorithm of Video Sharing System for Mobile Devices

S-LRU: A Cache Replacement Algorithm of Video Sharing System...

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International Conference on Computer Science and Network technology

作者： Jia Guo Chuanchang Liu Junliang Chen Huifeng Sun State Key lab of Networking and Switching Technology Beijing University of Posts & Telecommunications Research Institute of Petroleum Exploration & Development

ISBN: (纸本)9781467329637

Video sharing system for mobile devices is an important mobile service which can be used to share videos with others. Scalability is critical to the system. Cache technology, which employs cache servers to offload the original server, has been proposed to attack the scalability problem. Traditional replacement algorithms for cache technology are not suitable for the video sharing system. In this paper, we proposed a cache replacement algorithm called S-LRU for the system. In S-LRU, we consider the size difference of videos. Experimental results demonstrate that S-LRU outperforms the other algorithms.

关键词： Mobile Internet Video Sharing RESTful Web Service Cache Replacement Algorithm Video sharing mobile Internet Mobile devices replacement algorithm Cache memory cache replacement Videotapes

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A sustainable scalable framework for mapreduce

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International Journal of Advancements in Computing technology 2012年第9期4卷 19-26页

作者： Jin, Jing Qin, Zhen Li, Xin Chen, Shanzhi State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications China School of Electronic Engineering Xidian University China State Key Lab of Wireless Mobile Communication China Academy of Telecommunication Technology China

Data explosion and massive data processing are inevitable trends. Parallel processing with scalable cluster is essential in this age. MapReduce is one of the most popular parallel data processing tools. However, there are some deficiencies in its scalability. Therefore, this article presents a sustainable scalable framework for MapReduce which employs modular design. In this novel framework, all components are scalable and fault-tolerant. Meanwhile, the signaling system is designed to be as brief and clear as possible. The MapReduce master is replaced by two management planes which may be redesigned and reconstructed without any impacts on other components. The separation of resource management from tasks scheduling enable the framework to employ a hierarchical resource management.

关键词： MapReduce

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A Mobile IPv6 based Distributed Mobility Management Mechanism of Mobile Internet

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Physics Procedia 2012年 25卷 2249-2256页

作者： Shi Yan Cheng Jiayin Chen Shanzhi State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China International School Beijing University of Posts and Telecommunications Beijing China State key Lab of Wireless Mobile Communications China Academy of Telecommunication Technology Beijing China

A flatter architecture is one of the trends of mobile Internet. Traditional centralized mobility management mechanism faces the challenges such as scalability and UE reachability. A MIPv6 based distributed mobility management mechanism is proposed in this paper. Some important network entities and signaling procedures are defined. UE reachability is also considered in this paper through extension to DNS servers. Simulation results show that the proposed approach can overcome the scalability problem of the centralized scheme.

关键词： mobility management distributed MIPv6 mobile Internet

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A Mobile IPv6 based Distributed Mobility Management Mechanism of Mobile Internet

A Mobile IPv6 based Distributed Mobility Management Mechanis...

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2012 International Conference on Solid state Devices and Materials Science(SSDMS 2012)

作者： Shi Yan Cheng Jiayin Chen Shanzhi State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications International School Beijing University of Posts and Telecommunications State key Lab of Wireless Mobile Communications China Academy of Telecommunication Technology

关键词： mobility management distributed MIPv6 mobile Internet

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OBDD-based algorithm for reliability evaluation of Wireless Sensor Networks

OBDD-based algorithm for reliability evaluation of Wireless ...

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Prognostics and System Health Management Conference (PHM)

作者： Bo Zhao Yan Liu Yufeng Xiao State key Lab of Networking & Switching Tech Beijing University of Posts and Telecommunications Beijing China Information Engineering School Southwest University of Science and Technology Mianyang China

ISBN: (纸本)9781457719097

The key element of a Prognostics and Health Management (PHM) for Wireless Sensor Networks (WSN) is on its relaibility evaluation. To evaluate the reliability of WSN, an algorithm named Enhanced Node Expansion (ENE) is presented in this paper. The ENE constructs the Ordered Binary Decision Diagram (OBDD) with node expansion and computes the reliability on the OBDD structure. During the generation of OBDD, these redundant equivalent states are avoided, and redundant computations from isomorphic sub-networks are decreased. Experiments show ENE is more efficient than factoring algorithm for large size WSN.

关键词： reliability evaluation Wireless sensor networks Binary decision diagrams Crucial components Prognostic

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The Edge Collapse Algorithm Based on the Batched Iteration in Mesh Simplification

The Edge Collapse Algorithm Based on the Batched Iteration i...

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International Conference on Computer and Information Science (ACIS)

作者： Guanlong Li Wendong Wang Guohong Ding Yanming Zou Kongqiao Wang State Key Lab of Switching & Networking Technology Beijing University of Posts and Telecommunications Beijing China Nokia Research Center Nokia (China) Investment CO. LTD Beijing China

The mesh simplification technology plays an important role in computer graphics, reverse engineering, cultural relic protection and other fields which involve 3D modelling and dynamic demonstration. The geometric elements decimation algorithm, as one of triangle mesh simplification algorithms, has many advantages over the other simplified algorithms. The study in this paper puts forward an optimized solution based on QEM (Quadric Error Metric) which is a representative edge collapse algorithm. The optimized algorithm improves efficiency of mesh simplification and provides better pictures quality comparing with QEM algorithm in the project practice.

关键词： Algorithm design and analysis Three dimensional displays Solid modeling Computational modeling Face Computer graphics Cultural differences

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