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Complex Network.: Traffic Dynamics, Network.Performance, and Network.Structure

American Journal of Operations Research 2013年第1期3卷 187-195页

作者： Ziping Hu k.ishnaiyan Thulasiraman pramode k. verma Department of Computer Science The University of Oklahoma Norman USA School of Electrical & Computer Engineering The University of Oklahoma Tulsa USA

This paper explores traffic dynamics and performance of complex network.. Complex network. of various structures are studied. We use node betweenness centrality, network.polarization, and average path length to capture the structural characteristics of a network. Network.throughput, delay, and pack.t loss are used as network.performance measures. We investigate how internal traffic, through put, delay, and pack.t loss change as a function of pack.t generation rate, network.structure, queue type, and queuing discipline through simulation. Three network.states are classified. Further, our work.reveals that the parameters chosen to reflect network.structure, including node betweenness centrality, network.polarization, and average path length, play important roles in different states of the underlying network..

关键词： Complex Network. Betweenness Centrality Network Polarization Average Path Length Throughput De-lay Pack.t Loss

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Analysis of Security Vulnerabilities and Countermeasures of Ethernet Passive Optical Network.EPON)

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China Communications 2007年第3期4卷 17-29页

作者： Stamatios V.k.rtalopoulos pramode k.verma School of Electrical and Computer Engineering Telecommunications Systems Program University of Ok.ahoma-Tulsa Tulsa Ok.74135 USA

Ethernet-based Passive Optical Network.EPON) is considered a very promising solution for the first mile problem of the next generation *** to its particular characteristic of shared media structure,EPON suffers many security vulnerabilities. Communication security must be guaranteed when EPON is applied in *** paper gives a general introduction to the EPON system,analyzes the potential threats and attack. pertaining to the EPON system,and presents effective countermea-sures against these threats and attack. with emphasis on the authentication protocols and k.y distribution.

关键词： EPON security vulnerabilities attack. countermeasures authentication protocols k.y distribution

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A Network.Based Authentication Scheme for VoIP

A Network Based Authentication Scheme for VoIP

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2006 10th International Conference on Communication Technology（ICCT 2006）

作者： pramode k.verma School of Electrical and Computer Engineering University of Ok.ahomaTulsa OK USA

This paper presents a VoIP network.ng solution that incorporates network.based authentication as an inherent feature. The authentication feature that we propose introduces a range of flexibilities not available in the PSTN. Since most calls will lik.ly terminate on the network.of another service provider, we also present a mechanism using which network. can mutually authenticate each other to afford the possibility of authentication across network..

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