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无线/移动网络中自适应的接纳控制算法及性能分析

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通信学报 2004年第6期25卷 147-156页

作者：姜爱全赵阿群东南大学计算机科学与工程系江苏南京210096 教育部计算机网络和信息集成支撑技术重点实验室江苏南京210096

无线/移动网络中重要的连接级QoS性能指标包括新连接请求阻塞率(CBP)、切换连接请求丢弃率(HDP)等。其中,更不希望因切换连接请求的丢弃而导致服务的终止。为降低HDP,通常采用资源预留方案。但这种方案导致CBP较高、资源利用率低。本文... 详细信息

无线/移动网络中重要的连接级QoS性能指标包括新连接请求阻塞率(CBP)、切换连接请求丢弃率(HDP)等。其中,更不希望因切换连接请求的丢弃而导致服务的终止。为降低HDP,通常采用资源预留方案。但这种方案导致CBP较高、资源利用率低。本文针对自适应的多媒体应用带宽可以动态调整的特点,研究无线/移动网络中多优先级服务自适应的接纳控制机制,提出一个自适应的接纳控制算法,对其QoS性能进行分析。

关键词：无线/移动网络自适应的接纳控制连接级QoS 资源预留降级率 Markov模型

Software structure evaluation based on the interaction and encapsulation of methods

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Science china(information Sciences) 2012年第12期55卷 2816-2825页

作者： ZHENG QingHua 1,2,OU ZhiJiang 1,2,LIU Ting 1,YANG ZiJiang 3,HOU YuQiao 1,2 & ZHENG Chao 1,2 1 MOE key laboratory for Intelligent networks and network Security,Xi'an Jiaotong University,Xian 710049,china 2 Shaanxi key laboratory of Satellite-terrestrial network Technology R&D,Xi'an Jiaotong University,Xian 710049,china 3 Department of computer Science,Western Michigan University,Michigan,USA MOE key laboratory for Intelligent networks and network Security Xi’an Jiaotong University Xian China Shaanxi key laboratory of Satellite-terrestrial network Technology R&D Xi’an Jiaotong University Xian China Department of computer Science Western Michigan University Michigan USA

Software structure is the most important factor affecting the quality of a *** evaluation of software structure is a foundational technique for software ***,the traditional evaluation criteria,such as "high cohesion and low coupling",are no longer appropriate for the new web applications,which are designed with a hierarchical framework.A novel approach is proposed in this paper to evaluate software quality based on the interaction and encapsulation of *** particular,two criteria for high quality software,the functional and hierarchical structure,are proposed to support widely used web *** cohesion and coupling and layer matching ratios between methods within a software package are calculated to determine whether the package is well implemented in terms of functional or hierarchical *** approach enables us to quantify the quality of a software system according to the structural types of its *** were carried out on 18 versions of Struts and six open-source software *** evaluation concurs with the intuition that minor upgrades,aimed at fixing bugs and adding minor functionality quickly,reduce software quality,whereas major upgrades,which normally clean up messy code and re-construct the software,improve software quality.

关键词： software structure evaluation method interaction method encapsulation functional structure hierarchical structure

High-Order Bit Independence Criterion Test for the S-boxes

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Wuhan University Journal of Natural Sciences 2011年第5期16卷 447-451页

作者： GAO Sheng MA Wenping ZHU Jiwei key laboratory of computer network and information Securityof the ministry of education/Xidian University Xi'an 710071Shannxi China

A new security test for the substitution boxes （S-boxes） high-order bit independence criterion （HOBIC） test, is presented. Different from the previous security tests for S-boxes, the HOBIC test can be used to measure the strength of an S-box against attacks that keep some of its input bits constant. Test results over the S-boxes of Data Encryption Standard （DES） and Advanced Encryption Standard （AES） are given and some possible applications of the HOBIC test are analyzed. Meanwhile, the source code for a basic version of the HOBIC test is also provided, the implement process of which shows that it is very fast and efficient for practical applications .

关键词： cryptography Boolean functions S-boxes highorder bit independence criterion (HOBIC) security test

Research on trusted computing and its development

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Science china(information Sciences) 2010年第3期53卷 405-433页

作者： SHEN ChangXiang1, ZHANG HuanGuo1?, WANG HuaiMin3, WANG Ji3, ZHAO Bo2, YAN Fei2, YU FaJiang2, ZHANG LiQiang2 & XU MingDi21Beijing University of Technology, Beijing 100124, china 2School of computer, Wuhan University, key laboratory of Aerospace information Security and Trusted Computing of ministry of education, Wuhan 430072, china 3School of computer, National University of Defence Technology, Changsha 430074, china Beijing University of Technology Beijing China School of computer National University of Defence Technology Changsha China key laboratory of Aerospace information Security and Trusted Computing of ministry of education School of Computer Wuhan University Wuhan China

Trusted computing is a novel technology of information system security. It has become a new tide in worldwide information security area and achieved inspiring accomplishment. In china, the initiative research of trusted computing is not late, and the achievements are plentiful and substantial. Our country is in the front rank of the world in trusted computing. This paper comprehensively illustrates the recent development in theory and technology of trusted computing, introduces some improvements in trusted computing in our country, and proposes our opinions and viewpoints towards the existing problems in trusted computing and its future development.

关键词： information security trusted computing trusted computing platform trustworthy software trusted network connection

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IPv6对移动通信支持的研究

计算机工程与应用 2002年第3期38卷 172-174页

作者：承彦顾冠群东南大学计算机网络和信息集成教育部重点实验室南京210096

该文提出了IPv6的协议设计在移动方面提供的支持,描述了IPv6条件下移动结点的通信方式,并通过比较MoblieIPv4与MobileIPv6在路由、地址配置等方面的异同,指出IPv6能够更好地支持移动通信。

关键词：地址自动配置移动通信 IPv6协议路由器服务质量

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光网络流量工程的控制机制研究

计算机工程与应用 2002年第9期38卷 136-139页

作者：李仕锋顾冠群东南大学计算机科学与工程系南京210096 教育部计算机网络和信息集成重点实验室南京210096

密集波分复用DWDM(DenseWavelengthDivisionMultiplex)光网络有着十分丰富的带宽,并且能够根据实时需要提供带宽,所以逐渐成为Internet骨干核心网。该文提出一种在光网络中实施流量工程TE(TrafficEngineering)的建议,尤其突出了多协议... 详细信息

密集波分复用DWDM(DenseWavelengthDivisionMultiplex)光网络有着十分丰富的带宽,并且能够根据实时需要提供带宽,所以逐渐成为Internet骨干核心网。该文提出一种在光网络中实施流量工程TE(TrafficEngineering)的建议,尤其突出了多协议波长交换MPLS(Multi-ProtocolLambdaSwitch)控制平面和DWDM网络的综合。首先简单描述了光交叉连接OXC(OpticalCrossConnect)的一些基本概念,并介绍了利用TE管理器在两个或多个域之间进行组合控制的概念。进一步定义了在网络单元(如OXC,标记交换路由器LSR(LabelSwitchRouter),TE管理器)之间进行交互的控制消息。并介绍了TE管理的流程,包括动态带宽预留,快速恢复和回收网络资源。

关键词：光网络流量工程多协议波长交换光交叉连接控制机制 Internet

Image Hiding Algorithm in Discrete Cosine Transform Domain Based on Grey Prediction and Grey Relational Analysis

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china Communications 2013年第7期10卷 57-70页

作者：黄海平黄世超陈九天王汝传 College of computer Nanjing University of Posts and Telecommunications Jiangsu High Technology Research key laboratory for Wireless Sensor networks key laboratory of Broadband Wireless Communication and Sensor network Technology of ministry of education Nanjing University of Posts and Telecommunications Jiangsu Provincial key laboratory for computer information Processing Technology Soochow University

Traditional information hiding algorithms cannot maintain a good balance of capacity,invisibility and *** this paper,a novel blind colour image information hiding algorithm based on grey prediction and grey relational analysis in the Discrete Cosine Transform(DCT) domain is ***,this algorithm compresses the secret image losslessly based on the improved grey prediction GM(1,1)(IGM) *** then chooses the blocks of rich texture in the cover image as the embedding regions using Double-dimension Grey Relational Analysis(DGRA).Finally,it adaptively embeds the compressed secret bits stream into the DCT domain mid-frequency coefficients,which are decided by those blocks' Double-Dimension Grey Correlation Degree(DGCD) and Human Visual System(HVS).This method can ensure an adequate balance between invisibility,capacity and *** results show that the proposed algorithm is robust against JPEG compression(46.724 6 dB when the compression quality factor is 90%),Gaussian noise(45.531 3 dB when the parameter is(0,0.000 5)) etc.,and it is a blind information hiding algorithm that can be extracted without an original carrier.

关键词： image information hiding IGM DGRA blind information hiding DCT

Gray physical interference model based link scheduling algorithms

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Science china(information Sciences) 2012年第6期55卷 1337-1350页

作者： SU JinZhao 1,2,CAO Jing 1,2 & WU Wei 1,2 1 State key laboratory of Virtual Reality and Systems,Beijing 100191,china 2 School of computer Science and Engineering,Beihang University,Beijing 100191,china State key laboratory of Virtual Reality and Systems Beijing China School of computer Science and Engineering Beihang University Beijing China

To improve the concurrent data transmission capability of wireless multi-hop networks,this paper proposes adopting a gray physical interference model instead of using the threshold physical interference *** model allows non-ideal links to be involved in scheduling,under the premise of not affecting the quality of existing transmission *** addition,we design two greedy algorithms to schedule more links with SINR values located in the transition *** results show that a gray physical interference model is more accurate than a threshold physical interference one,the concurrent transmission capability of a network based on the gray physical interference model is significantly increased,and network throughput is increased by 20%.

关键词： gray physical interference model threshold physical interference model link scheduling concurrent transmission TDMA

Fault Tolerant Approach for Data Encryption and Digital Signature Based on ECC System

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Fault Tolerant Approach for Data Encryption and Digital Sign...