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Non-redundant identifier-based Authentication scheme for heterogeneous wireless network

Non-redundant identifier-based Authentication scheme for het...

2010 2nd IEEE International Conference on Information Management and engineering(2010年IEEE第二届信息管理与工程国际会议 IEEE ICIME 2010)

作者： Hua Zhao ruyun Zhang Kaizhi Huang Yuhong Wang Jianhua Peng National Digital Switching System Engineering & Technological R&D Center China

In heterogeneous wireless network, its open and interconnected characteristic challenges current secure mechanisms, To enhance the security and reduce the redundant identifiers of users, An access authentication scheme based on the nonredundant identifier is proposed. The scheme is to realize identifier authentication, through using identity separating storage, substitute transmission and identifier updating mechanisms, user privacy protection is enhanced. This paper also improves AKA algorithm to enhance the security of access authentication. Finally, security and communication performance of the proposed protocol are analyzed. The result showed that the proposed scheme is efficient and secure met users’ requirements in access security.

关键词： access authentication non-redundant identifier heterogeneous wireless network

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A Variable Length Counting Bloom Filter

A Variable Length Counting Bloom Filter

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2010 2nd International Conference on Computer engineering and technology(2010年第二届计算机工程与技术国际会议 ICCET 2010)

作者： Lichun Li Bingqiang Wang Julong Lan National Digital Switching System Engineering & Technology R&D Center Information Engineering University Zhenzhou China

ISBN: (纸本)9781424463473;9781424463497;9781424463503

In this paper,a new data structure called variable length counting Bloom filter is proposed for membership queries. This data structure uses variable length counters instead of fixed length counters in Bloom filter. rules for the operations of the filter are defined. The size of the new data structure is analyzed. Both the analysis and the simulation show that it is about 1.7 times of that of the standard Bloom filter,which is much less than that of the traditional counting Bloom filter. The application range of the new filter is as wide as the counting Bloom filter.

关键词： Bloom filter:hash function:membership query variable length

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COrrECTION OF rANdOM ANd OUTBUrST ErrOr IN MPEG-2 COdE

CORRECTION OF RANDOM AND OUTBURST ERROR IN MPEG-2 CODE

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2010 3rd IEEE International Conference on Broadband Network & Multimedia technology(2010年第三届IEEE宽带网络与多媒体国际会议 IC-BNMT 2010)

作者： Zhihong ding Lizhu Liu Meijun Fan National Digital Switching System Engineering &Technological R&D Center ZhengZhou China

due to the use of variable length coding(VLC), the MPEG-2 code is very sensitive to channel disturbances. A single bit error in I frame may propagate up to the rest of the slice until the next resynchronization point is reached and may also propagate into temporal domain because of interframe coding. As a result,it leads to noticeable degradation of the decoded video quality. To prevent error propagation, an error correction algorithm to I frame is presented in this paper:moving window error correction *** different from error concealment (EC) methods, it can partly correct some random and outburst errors in the corrupted discrete cosine transform (dCT) regions and can recover the original *** methods are used only when the correction algorithm fails. The performance of the proposed scheme proves to be satisfactory and surpasses the only use of EC methods under study.

关键词： VLC MPEG-2 error propagation error correction error concealment dCT

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A Fuzzy Set Based dynamic Trust Model for Heterogeneous Wireless Networks

A Fuzzy Set Based Dynamic Trust Model for Heterogeneous Wire...

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International Conference on Networks Security, Wireless Communications and Trusted Computing, NSWCTC

作者： Xiaojun He Kaizhi Huang Peng Zhang Xingguo Luo Engineering & Technological R&D Center National Digital Switching System Zhengzhou China

ISBN: (纸本)9781424465972;9780769540115

The integration of various wireless networks brings some new access security challenges in heterogeneous wireless networks (HWNs). Transaction of the mobile host with an unknown network is more a norm than an exception. This paper proposes a trust management mechanism and a fuzzy set based dynamic trust model (FBdTM) to evaluate the trustworthiness of the network in HWNs. In the model, trust is a measure of information imprecision which can be measured by membership degrees to different fuzzy sets. The evaluation incorporates direct trust, recommendation trust, reputation of recommenders and time stamp. direct and recommendation trusts reflect how well the network has fulfilled the service agreement in the past. By introducing reputation of recommenders, malicious behaviors of the dishonest entities are restrained effectively. Time stamp makes the evaluation pay much attention to the most recent performance records. Based on the trustworthiness, the mechanism helps mobile host make a decision on the access network selection. The simulation results show the FBdTM model can accurately evaluate the trustworthiness of the network and effectively restrain the acts of slander and co-fraud.

关键词： Fuzzy sets Wireless networks Feedback Communication system security national security research and development Network servers Wireless communication Computer networks Fuzzy systems

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PrOBABILISTIC ACCESS BASEd CALL AdMISSION CONTrOL IN MULTI-TrAFFIC CdMA system

PROBABILISTIC ACCESS BASED CALL ADMISSION CONTROL IN MULTI-T...

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2010 2nd IEEE International Conference on Network Infrasturcture & digital Content(2010年第二届IEEE网络基础设施与数字内容国际会议 IC-NIdC 2010)

作者： Shanshan Wang Peng Li Xingguo Luo National Digital Switching System Engineering & Technological R&D Center Zhengzhou China

An efficient Call Admission Control (CAC) arithmetic is essential to guarantee QoS for enhancing the utilization of radio resource in multitraffic CdMA systems. This paper presents a Multi-Class Services dynamic Mixed Judgment CAC arithmetic. This arithmetic judges a new coming call whether to accept or not based on the remaining resource, the priority of all services and the resource reservation for high priority. When self-similar service is coming, it uses probabilistic access. The results show that this arithmetic can keep better performance.

关键词： CdMA Call Admission Control QoS Multi-class Services

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A Method of Content Based Fax retrieval

A Method of Content Based Fax Retrieval

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2010 IEEE International Conference on Intelligent Computing and Intelligent systems(2010 IEEE 智能计算与智能系统国际会议 ICIS 2010)

作者： Xiao-lei Feng Hong-tao Yu Li-xiong Liu China National Digital switching System Engineering & Technological R&D Center ZhengZhou China

According to the characteristics of fax paper, a method of content-based fax retrieval is put forward. The wavelet decomposition is used in the fax image de-noising, and the wavelet coefficients are used for regional division, and then combined with optical character recognition technology to extract the semantic features of the text region and the shape features of the logo for the fax retrieval. The accuracy of retrieval is improved notably. At the same time, the algorithm of features fusion for retrieval is given. Experiments show that the method has high precision and recall, which is more effective than retrieval methods based on manual annotated semantic.

关键词： wavelet transform fax retrieval feature extraction optical character ricogernition (OCr)

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data reuse in Sliding Window Operations Base on Storing Block Targeted Hardware Compilation

Data Reuse in Sliding Window Operations Base on Storing Bloc...

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The 2010 2nd International Conference on Future Computer and Communication(第二届未来计算机与通信国际会议 ICFCC 2010)

作者： Taogang Liu rongcai Zhao Yuan Yao Jin Qu National Digital Switching System Engineering & Technological R&D Center (NDSC) Zhengzhou China

ISBN: (纸本)9781424458219;9781424458240

A memory architecture is proposed to automatically explore the design space consisting of data reuse for sliding window applications, in the context of FPGAtargeted hardware compilation. Sliding window operator is widely used in the typical applications on reconfigurable system, such as image processing, pattern recognition and digital signal processing, etc. But the sliding window circuit generated by reconfigurable compiler system is not so efficiency, limited by redundant storage, waiting operation and so on. In this paper, we present a block-based storage data reuse method to increases data throughput in sliding window applications. Through parallel access the window data, our method can reduce memory access time and improve the performance of hardware circuit. Experiments show that in three typical applications of sliding window, this approach can achieve accelerating of sliding window circuit, the performance of the program enhances 6.5-7.9 times.

关键词： reconfigurable computing reconfigurable compiler window sliding data used store block

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Effects of Sputtering Power and Annealing Temperature on the Properties of Sc-doped ZnO Thin Films

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MrS Online Proceedings Library (OPL) 2011年第1期928卷 0928-GG14-02-0928-GG14-02页

作者： Ming Hua Shiao Cheng-Chung Jaing Yu-Jia Huang Chien-Ying Su Chih-Jung Lu mhshiao@itrc.org.tw Instrument Technology Research Center National Applied Research Laboratories Planning & Promotion Division 20 R&D Road VI Hsinchu Science Park Hsinchu 300 Taiwan Hsinchu N/A 300 Taiwan +886-3-5779911 ext. 555 +886-3-5773947 ccjaing@must.edu.tw Ming Hsin University of Science & Technology Department of Optoelectronic System Engineering No. 1 Hsin Hsin Road Hsin Feng Hsinchu N/A 304 Taiwan 080look@yahoo.com.tw Ming Hsin University of Science & Technology Department of Electronic Engineering No. 1 Hsin Hsin Road Hsin Feng Hsinchu N/A 304 Taiwan sujames@itrc.org.tw Instrument Technology Research Center National Applied Research Laboratories Vacuum Technology Division 20 R&D Road VI Hsinchu Science Park Hsinchu N/A 300 Taiwan d9266010@mail.nchu.edu.tw National Chung Hsing University Department of Materials Engineering 250 Kuo Kuang Rd. Taichung N/A 402 Taiwan

Sc-doped ZnO thin films were deposited on Corning 1737 glasses by using rF magnetron co-sputtering system with Sc2O3 and ZnO targets. different sputtering powers of Sc2O3 target and post annealing of 550°C for 2 hr were investigated to understand the effect on microstructural, optical and electrical properties of Sc-doped ZnO thin films. From X-ray diffraction (Xrd) results, the Sc-doped films have (002) preferred orientation. Cross-sectional scanning electron microscope (SEM) show that the Sc-doped ZnO thin films have columnar structure before and after annealing procedure. Atomic force microscopy (AFM) surface measurement also shows that the surface roughness of the films was smoother when the Sc2O3 sputtering power increased. The optical transmission of as deposited Sc-doped films in the visible region all exceeded 80%, and increased about 3% after samples annealed. Electrical resistivity measurement reveals that the as-deposited Sc-doped ZnO thin films had lowest resistivity of 0.97 Ω cm when the Sc2O3 sputtering power was 125W. After annealing the lowest resistivity decreased to 9.85 × 10−2 Ω cm in which 200W of the Sc2O3 sputtering power was applied.

关键词： optoelectronic Sc sputtering

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dESIGN ANd IMPLEMENTATION OF SAFETY FAX SErVEr

DESIGN AND IMPLEMENTATION OF SAFETY FAX SERVER

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2010 3rd IEEE International Conference on Broadband Network & Multimedia technology(2010年第三届IEEE宽带网络与多媒体国际会议 IC-BNMT 2010)

作者： Hongtao Yu Xiaolei Feng Fucai Chen China National Digital Switching System Engineering & Technological R&D Center ZhengZhou China

Lack of preventive measures against junk fax is a great problem in the research on fax server. Safety fax server is proposed in this paper, which detect the received fax before distributing them in order to prevent users from junk fax. Because junk faxes spread in the form of broadcast, the server carries on preliminary flitting by clustering the incoming fax at first, and then uses Optical Character recognition (OCr) technology to recognize the keywords and distinguish the junk fax. Proved by experiment, this method is not only easy to implement, but also available.

关键词： fax server Safety fax server junk fax clustering OCr keywords recognition

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A METHOd OF GENErATING FAX INdEX

A METHOD OF GENERATING FAX INDEX

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2010 2nd IEEE International Conference on Network Infrasturcture & digital Content(2010年第二届IEEE网络基础设施与数字内容国际会议 IC-NIdC 2010)

作者： Xiaolei Feng Hongtao Yu China National Digital Switching System Engineering & Technological R&D Center ZhengZhou China

Managing and searching facsimiles automatically is the key point to achieve OA (Office Automation). At present, there is a lack of method to establish index of fax, which is the basis of searches. Focus on official business faxes, this paper proposes an approach to create index of fax, using logo, stamp and keywords, after analyzing the characteristics of these faxes thoroughly. The result illuminates that this method can improve the robustness to noise efficiently, and obtains high performance in Precision and recall.

关键词： Image preprocessing layout analysis OCr feature extraction Indexing

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