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2014 International Conference on Simulation and Modeling Methodologies, Technologies and Applications, SMTA 2014

作者： Wei, Hongquan Chen, Hongchang Wang, Xianfa Huang, Kaizhi National Digital Switching System Engineering Technological R and D Center Zhengzhou Henan China

ISBN: (纸本)9781845649821

Current studies on complex networks are mainly concentrated on some specific properties of the complex network. In view of the lack of universal analysis model, a universal complex network model with limited degree is built from the common characteristics of complex network. The evolution role and calculation are described in detail, focusing on the analysis of typical characteristics of complex networks, such as the degree distribution, the average shortest path, clustering coefficient, and community distribution. Simulation proves the correctness of networking properties in complex network theory. © 2014 WIT Press.

关键词： Complex networks

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基于OpenFlow的流分片负载均衡算法(英文)

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China Communications 2014年第12期11卷 72-82页

作者：王鹏兰巨龙陈庶樵 National Digital Switching System Engineering and Technological R&D Center(NDSC)

Today’s data center networks are designed using densely interconnected hosts in the data *** are multiple paths between source host and destination ***,how to balance traffic is key issue with the fast growth of network *** lots of load balancing methods have been proposed,the traditional approaches cannot fully satisfy the requirement of load balancing in data center *** main reason is the lack of efficient ways to obtain network traffic statistics from each network *** a solution,the OpenFlow protocol enables monitoring traffic statistics by a centralized ***,existing solutions based on OpenFlow present a difficult dilemma between load balancing and packet *** achieve a balance between load balancing and packet reordering,we propose an OpenFlow based flow slice load balancing *** introducing the idea of differentiated service,the scheme classifies Internet flows into two categories:the aggressive and the normal,and applies different splitting granularities to the two classes of *** scheme improves the performance of load balancing and also reduces the number of reordering *** the trace-driven simulations,we show that the proposed scheme gains over 50%improvement over previous schemes under the path delay estimation errors,and is a practical and efficient algorithm.

关键词： OpenFlow traffic splitting load balancing packet reordering splitting granularity

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Secrecy performance analysis of SLNr-based beamforming scheme in MISOME wiretap channels

Secrecy performance analysis of SLNR-based beamforming schem...

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International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Yanqun Tang Caiyao Sheng Wei Liu Yunpeng Hu Xiaoyi Zhang Zhengzhou Institute of Information Science and Technology Zhengzhou P. R. China National Digital Switching System Engineering & Technology R&D Center Zhengzhou P. R. China PLA Troops 91290 Beijing P. R. China

ISBN: (纸本)9781467376884

The thinking of signal-to-leakage-plus-noise ratio (SLNr) is widely used for multi-user multiple-input multiple-output (MU-MIMO) systems in many works. We analyze the secrecy performance of the SLNr-based beamforming scheme in the multiple-input single-output multi-antenna eavesdropper (MISÓME) wiretap channel. Our analysis proofs the SLNr-based beamforming scheme has almost the same performance as the generalized eigenvalue decomposition (GEd) based beamforming scheme, and has significant gain over the zero-forcing (ZF) beamforming scheme.

关键词： GEd-based beamforming SLNr-based beamforming Wiretap channel ZF beamforming performance analysis Beamforming Privacy Scheme multiple input multiple output systems

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City-Level Geolocation Based on routing Feature

City-Level Geolocation Based on Routing Feature

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International Conference on Advanced Information Networking and Applications (AINA)

作者： Fan Zhao Yuhan Song Fenlin Liu Ke Ke Jingning Chen Xiangyang Luo Zhengzhou Information Science and Technology Institute China National Digital Switching System Engineering and Technological R&D Center Zhenazhou Henan China Zhengzhou Information Science and Technology Institute State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Henan China

For the problem that traditional approaches for IP geolocation based on delay measurement are difficult to apply to network with weak connectivity such as China's Internet, in this paper, we utilize its hierarchical topology and proposed an approach of City-level geolocation based on routing feature. Taking IPs with known geographical location as reference nodes, this approach extracts identifying IPs of candidate regions or cities based on decision tree learning algorithm. We match the path of the target with IPs above called identifying features, and then select the region or city whose identifying feature is contained on the target's path as geolocation result. This approach improves the average accuracy for the Internet with weak connectivity hierarchical topology to 93% vs. 73% for the previous learning-based geolocation approach.

关键词： Geology Cities and towns IP networks delays Internet Topology Network topology

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OpenFIow Based Flow Slice Load Balancing

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China Communications 2014年第12期11卷 72-82页

作者： WANG Peng LAN Julong CHEN Shuqiao National Digital Switching System Engineering and Technological R&D Center (NDSC) Zhengzhou He'nan 450000 China

Today's data center networks are designed using densely interconnected hosts in the data *** are multiple paths between source host and destination ***,how to balance traffic is key issue with the fast growth of network *** lots of load balancing methods have been proposed,the traditional approaches cannot fully satisfy the requirement of load balancing in data center *** main reason is the lack of efficient ways to obtain network traffic statistics from each network *** a solution,the OpenFlow protocol enables monitoring traffic statistics by a centralized ***,existing solutions based on OpenFlow present a difficult dilemma between load balancing and packet *** achieve a balance between load balancing and packet reordering,we propose an OpenFlow based flow slice load balancing *** introducing the idea of differentiated service,the scheme classifies Internet flows into two categories:the aggressive and the normal,and applies different splitting granularities to the two classes of *** scheme improves the performance of load balancing and also reduces the number of reordering *** the trace-driven simulations,we show that the proposed scheme gains over 50%improvement over previous schemes under the path delay estimation errors,and is a practical and efficient algorithm.

关键词： OpenFlow traffic splitting load balancing packet reordering splitting granularity

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resource Scheduling Algorithm and Ecnomic Model in ForCES Networks

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China Communications 2014年第3期11卷 91-103页

作者： ZHUGE Bin dENG Li dAI Guowei WAN Lei WANG Weiming LAN Julong Zhejiang Gongshang University Hangzhou China310018 National Digital Switching System Engineering & Technological R&D Center Henan 450002

resource scheduling algorithm for ForCES(Forwarding and Control Element Separation) networks need to meet the flexibility,programmability and scalability of node ***(deadline Budget Constrain) algorithm relies on users select cost or time priority,then scheduling to meet the requirements of ***,this priority strategy of users is relatively simple,and cannot adapt to dynamic change of resources,it is inevitable to reduce the *** order to improve QoS,we refer to the economic model and resource scheduling model of cloud computing,use SAL(Service Level Agreement) as pricing strategy,on the basis of dBC algorithm,propose an dABP(deadline And Budget Priority based on dBC) algorithm for ForCES networks,dABP combines both budget and time priority to *** simulation and test,we compare the task finish time and cost of dABP algorithm with dP(deadline Priority) algorithm and BP(Budget Priority) algorithm,the analysis results show that dABP algorithm make the task complete with less cost within deadline,benifical to load balancing of ForCES networks.

关键词： ForCES networks economicmodel cloud computing resource scheduling

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PrCA： A highly efficient computing architecture

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engineering Sciences 2014年第4期12卷 38-47页

作者： Luo Xingguo National Digital Switching System Engineering & Technological R&D Center Zhengzhou 450002 China

Applications can only reach 8 %~15 % of utilization on modern computer systems. There are many obstacles to improving system efficiency. The key root is the conflict between the fixed general computer architecture and the variable requirements of applications. Proactive reconfigurable computing architecture(PrCA) is proposed to improve computing efficiency. PrCA dynamically constructs an efficient computing architecture for a specific application via reconfigurable technology by perceiving requirements,workload and utilization of computing resources. Proactive decision support system(PdSS),hybrid reconfigurable computing array(HrCA) and reconfigurable interconnect(rIC) are intensively researched as the key technologies. The principles of PrCA have been verified with four applications on a test bed. It is shown that PrCA is feasible and highly efficient.

关键词： PrCA efficient computing challenges

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The research on SLP Optimization Technique towards dSP

The Research on SLP Optimization Technique towards DSP

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第11届分布式计算及其应用国际学术研讨会

作者： Weiyi Suo rongcai Zhao Yuan Yao Peng Liu National Digital Switching System Engineering & Technological R&D Center

According to the application of Superword Level Paralleism SLP auto-vectorization compiling system in digital Signal Processing(dSP), due to the specialized functions of dSP frame, such as the specific addressing model, a wide variety of registers, irregular data branch, the obstacle of dependence relation to vectorization non-aligned data or other reasons, which resulted in the compiler can not support SIMd auto-vectorization with the feature of dSP. In order to solve this problem, the SLP auto-vectorization method was studied towards dSP frame. Based on the specialized functions of dSP frame, the instruction analysis and optimization algorithm in SLP auto-vectorization were improved, so as to transform more high-efficiency source program. The experimental results show that the optimization method of this paper has a tremendous role on improving dSP performances and reducing power consumption.

关键词： SIMd,dSP,Auto-vectorization,redundancy optimization,Instruction analysis

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Spectral segmentation based on the weighted histogram

Spectral segmentation based on the weighted histogram

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2013 International Conference on Future Computer and Information Technology(ICFCIT 2013)

作者： Lei Zeng Jian Chen Li Tong Bin Yan Xijian Ping National Digital Switching System Engineering and Technology R&D Center

Spectral segmentation algorithms can extract the global impression of an image and be widely used in many areas and applications related to image segmentation. Traditional spectral algorithms need to construct an affinity matrix based on all the pixels in the image and compute the eigenvectors of the matrix to find global optimum segmentation. With the growing of image size, the spatial and computational complexity increases egregiously. We propose a novel approach for solving the problem. rather than focusing on pixels in the image, our approach aims at the gray histogram extracting the global impression of an image. We construct an affinity matrix directly based on the gray histogram and weight matrix with a histogram coefficient of corresponding gray level. Our method decreases the affinity matrix dimension to 256 ?256 at most for the gray image, and thus decreases the complexity sharply. The spatial and computational complexity is insensitive to the image size. We have used the proposed method to segment text and PCB images, and found the segmentation results to be very encouraging.

关键词： spectral segmentation,spectral clustering,histogram,affinity matrix,computational complexity

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A universal analysis on complex network model with limited degree

A universal analysis on complex network model with limited d...

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2014 International Conference on Simulation and Modeling Methodologies, Technologies and Applications (SMTA 2014)

作者： Hongquan Wei Hongchang Chen Xianfa Wang Kaizhi Huang National Digital Switching System Engineering & Technological R&D Center

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