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A method to evaluate the spatial extensibility of a switching unit and network

Science China(Information Sciences) 2014年第2期57卷 140-156页

作者： ZHANG Bo WU JunTing WANG BinQiang LI Hui National Digital Switching System Engineering Technological R&D Center Shenzhen Key Lab of Cloud Computing Technology and Application

Switching units and networks have been analyzed as extensible fabrics,mostly in terms of their scheduling *** traditional literature on switching extensibility has provided complexity theory only relating to the total numbers of inputs(or outputs)and exchange *** paper analyzes switching extensibility in terms of not only the scheduling algorithm and also the fabric *** is found that determining extensibility from soft complexity related to the number of inputs(or outputs)of the scheduling algorithm and the fabric extensibility in previous studies without quantization is a flawed conception.A method is thus proposed to express the spatial extensibility of a switching unit or network in terms of the connections of a switching resource and *** method calculates parameter ES(the efciency of switching)of an m×n switching unit and obtains two functions of the switching unit to describe spatial extensibility along with the number of unilateral inputs or *** is found that the range of ES is(0,1]and three types of switching unit and two types of crosspoint networks have ES=*** is calculated for banyan,Clos,parallel packet,fully interconnected and recirculation switching *** ES value for the banyan switching network is larger than that for other networks,and switching networks are classified into three types that have absolute/linear/denied spatial extensibility according to the limES *** is demonstrated that a switching network has the largest ES value when it contains only the five types of switching unit for which ES=***,a group-switching-first self-routing banyan switching network with lower blocking probability and time delay is deduced,and the ES method is contrasted with two other methods of evaluating spatial extensibility in terms of their mathematical expressions and intuitive graphics,for the five types of switching network listed above.

关键词： spatial extensibility connection state efciency of switching banyan fully interconnected recirculation switching network

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A synchronous algorithm of network coding with hardware logic

A synchronous algorithm of network coding with hardware logi...

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Symposium on ICT and Energy Efficiency and Workshop on Information Theory and Security, CIICT 2012

作者： Li, Jiang Li, Yining Li, Hui Zhu, Zhipu Zhang, Huayu Chen, Fuxing Shenzhen Key Lab. of Cloud Computing Technology and Application Shenzhen Graduate School Peking University Shenzhen 518055 China

ISBN: (纸本)9781849195478

This paper presents an efficient hardware prototype for network coding (NC). First, a packet synchronization mechanism is introduced to settle the problem of packet arriving mismatch between different incoming channels. Then a high-speed lookup-table-based circuit is designed to perform dot product over Galois Field, which forms the basic calculation unit of NC operation. Taking the speed advantage of FPGA hardware, this prototype is able to perform network coding operations within several hundred nanoseconds. Thus further studies and emulations on NC are able to be carried out upon this platform in the real network scenario.

关键词： Network coding

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Query-focused multi-document summarization based on query-sensitive feature space 12

Query-focused multi-document summarization based on query-se...

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21st ACM International Conference on Information and Knowledge Management, CIKM 2012

作者： Yin, Wenpeng Pei, Yulong Zhang, Fan Huang, Lian'en Shenzhen Key Lab. for Cloud Computing Technology and Application Peking University Shenzhen Graduate School Shenzhen 518055 China

ISBN: (纸本)9781450311564

Query-oriented relevance, information richness and novelty are important requirements in query-focused summarization, which, to a considerable extent, determine the summary quality. Previous work either rarely took into account all above demands simultaneously or dealt with part of them in the dynamic process of choosing sentences to generate a summary. In this paper, we propose a novel approach that integrates all these requirements skillfully by treating them as sentence features, making that the finally generated summary could fully reflect the combinational effect of these properties. Experimental results on the DUC2005 and DUC2006 datasets demonstrate the effectiveness of our approach. © 2012 ACM.

关键词： Vector spaces

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A novel biased diversity ranking model for Query-oriented multidocument summarization

A novel biased diversity ranking model for Query-oriented mu...

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2013 International Conference on Vehicle and Mechanical Engineering and Information technology, VMEIT 2013

作者： Lei, Kai Zeng, Yi Fan The Shenzhen Key Lab for Cloud Computing Technology and Application Peking University Shenzhen Graduate School Shenzhen Guangdong 518055 China

ISBN: (纸本)9783037858202

Query-oriented multi-document summarization (QMDS) attempts to generate a concise piece of text byextracting sentences from a target document collection, withthe aim of not only conveying the key content of that corpus,also, satisfying the information needs expressed by that *** to its great applicable value, QMDS has been intensively studied in recent decades. Three properties are supposed crucial for a good summary, i.e., relevance, prestige and low redundancy (orso-called diversity). Unfortunately, most existing work either disregarded the concern of diversity, or handled it with non-optimized heuristics, usually based on greedy sentences election. Inspired by the manifold-ranking process, which deals with query-biased prestige, and DivRank algorithm which captures query-independent diversity ranking, in this paper, we propose a novel biased diversity ranking model, namedManifoldDivRank, for query-sensitive summarization tasks. The top-ranked sentences discovered by our algorithm not only enjoy query-oriented high prestige, more importantly, they are dissimilar with each other. Experimental results on DUC2005and DUC2006 benchmark data sets demonstrate the effectivenessof our proposal. © (2013) Trans Tech Publications, Switzerland.

关键词： Conveying

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Prologue: Unified polymorphic routing towards flexible architecture of reconfigurable infrastructure 9

Prologue: Unified polymorphic routing towards flexible archi...

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9th International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, TridentCom 2014

作者： Pan, Kai Li, Hui Liu, Weiyang Zhu, Zhipu Chen, Fuxing Zhu, Bing Shenzhen Engineering Lab of Converged Networks Technology Shenzhen Key Lab of Cloud Computing Technology and Application Peking University Shenzhen Graduate School Shenzhen518055 China

ISBN: (纸本)9783319133256

Today’s Internet architecture was designed and proposed in the 60s and 70s with the intention to interconnect several computing resources across a geographically distributed user group. With the advent of substantially various Internet businesses, traditional Internet is increasingly powerless to satisfy the unprecedented demands. This paper probed the polymorphic routing prototype based on proposed Flexible Architecture of Reconfigurable Infrastructure (FARI) which attempts to emerge as a clean-slate revolution of future Internet and resorts to centralized control manner. Routers in FARI were reconfigurable to adapt to different businesses in terms of identifier type. Moreover, a preliminary framework of FARI is proposed in the end of the article. © Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2014.

关键词： Reconfigurable architectures

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Semi-centralized name routing mechanism for reconfigurable network 9

Semi-centralized name routing mechanism for reconfigurable n...

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9th International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, TridentCom 2014

作者： Chen, Fuxing Liu, Weiyang Li, Hui Zhu, Zhipu Shenzhen Engineering Lab of Converged Networks Technology Shenzhen Key Lab of Cloud Computing Technology and Application Peking University Shenzhen Graduate School Shenzhen518055 China

ISBN: (纸本)9783319133256

Dedicated to overcoming weakness of current Internet architecture, some novel internet architectures have been proposed recently. Examples of these architectures contain Information Centric Networking (ICN), Name Data Networking (NDN), reconfigurable networking etc. As far as we know, the most efficient name based routing mechanism which suites the new architectures has not been found yet. This paper proposed a Semi-Centralized Name Routing (SCNR) protocol for reconfigurable network to enhance the routing efficiency. Results of this paper show that SCNR has good performance in ICN, which can be regarded as one of the many sub-networks in reconfigurable network. © Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2014.

关键词： Network architecture

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Optimization-based atomic capability routing model for flexible architecture of reconfigurable infrastructure 9

Optimization-based atomic capability routing model for flexi...

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9th International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, TridentCom 2014

作者： Liu, Weiyang Li, Hui Chen, Fuxing Pan, Kai Shenzhen Engineering Lab of Converged Networks Technology Shenzhen Key Lab of Cloud Computing Technology and Application Peking University Shenzhen Graduate School Shenzhen518055 China

ISBN: (纸本)9783319133256

There are more and more emerging problems in today’s Internet, indicating today’s Internet architecture can not meet the quality requirement of various applications and service. With conventional Internet under mounting pressure, a new future Internet architecture named as Flexible Architecture of Reconfigurable Infrastructure (FARI) has been developed and implemented in China. Aiming at designing a routing mechanism which is one of the most essential issue in any Internet architecture, this paper explores to establish an optimization-based atomic capability routing model that is able to optimally select or generate a routing protocol based on the current network quality of service (QoS) requirement. In experiments, the feasibility of this routing model is verified and results of complexity analysis are satisfying. ©Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2014.

关键词： Routing protocols

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Automatic multi-document summarization based on new sentence similarity measures

Automatic multi-document summarization based on new sentence...

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12th Pacific Rim International Conference on Artificial Intelligence, PRICAI 2012

作者： Yin, Wenpeng Pei, Yulong Huang, Lian'en Shenzhen Key Lab. for Cloud Computing Technology and Applications Peking University Shenzhen Graduate School Shenzhen Guangdong 518055 China

ISBN: (纸本)9783642326943

The acquiring of sentence similarity has become a crucial step in graph-based multi-document summarization algorithms which have been intensively studied during the past decade. Previous algorithms generally considered sentence-level structure information and semantic similarity separately, which, consequently, had no access to grab similarity information comprehensively. In this paper, we present a general framework to exemplify how to combine the two factors above together so as to derive a corpus-oriented and more discriminative sentence similarity. Experimental results on the DUC2004 dataset demonstrate that our approaches could improve the multi-document summarization performance to a considerable extent. © 2012 Springer-Verlag.

关键词： Semantics

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Generic multi-document summarization using topic-oriented information

Generic multi-document summarization using topic-oriented in...

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12th Pacific Rim International Conference on Artificial Intelligence, PRICAI 2012

作者： Pei, Yulong Yin, Wenpeng Huang, Lian'En Shenzhen Key Lab. for Cloud Computing Technology and Applications Peking University Shenzhen Graduate School Shenzhen Guangdong 518055 China

ISBN: (纸本)9783642326943

The graph-based ranking models have been widely used for multi-document summarization recently. By utilizing the correlations between sentences, the salient sentences can be extracted according to the ranking scores. However, sentences are treated in a uniform way without considering the topic-level information in traditional methods. This paper proposes the topic-oriented PageRank (ToPageRank) model, in which topic information is fully incorporated, and the topic-oriented HITS (ToHITS) model is designed to compare the influence of different graph-based algorithms. We choose the DUC2004 data set to examine the models. Experimental results demonstrate the effectiveness of ToPageRank. And the results also show that ToPageRank is more effective and robust than other models including ToHIST under different evaluation metrics. © 2012 Springer-Verlag.

关键词： Graphic methods

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Design and implementation of Load-Balanced Multipath Self-routing switching system

Design and implementation of Load-Balanced Multipath Self-ro...

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International MultiConference of Engineers and Computer Scientists, IMECS 2014

作者： Zhan, Qian Li, Hui Chen, Fuxing Ma, Li Peking University Shenzhen Graduate School Shenzhen GuangDong518055 China Shenzhen Eng. Lab. of Converged Networks Technology Shenzhen Key Lab. of Cloud Computing Tech. and App. China

ISBN: (纸本)9789881925336

In order to ensure high quality of service (QoS) for Next Generation Network (NGN), we construct an innovative Load-Balanced Multipath Self-routing Switching Structure which consists of the same two multipath self-routing fabrics. The result of simulation is inspiring for achieving 100% throughput and no delay or jitter. For this reason, we start on the implementation on an Altera StratixIV FPGA. And the whole FPGA system is designed into two collab.rative components: the UDP system and the register system. With two algorithms around input and output two stages, incoming traffic is transformed into uniformity and then to their final destinations. During the later period debugging, software simulation platform and automated test platform are built, which contribute to our work very much. At last, we carry out several experiments to test and verify our system. The report of the test result accords with what we expected.

关键词： Field programmable gate arrays (FPGA)

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