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Search Publications by: Nada T. Golmie (Fed)

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Displaying 101 - 125 of 170

Optimizing Authentication in Media Independent Handovers using IEEE 802.21

August 6, 2009
Author(s)
Antonio Izquierdo Manzanares, Nada T. Golmie, Richard A. Rouil
In this paper we study the performance of the authentication process in media independent handovers, and consider the impact of using IEEE 802.21 link triggers to achieve seamless mobility. We describe all interactions between the 802.21 services and the

Probabilistic Call Admission Control Algorithm for WLAN in a Heterogeneous Wireless Environment

April 30, 2009
Author(s)
Nicolas Chevrollier, David W. Griffith, Nada T. Golmie, SuKyoung Lee, Kyungsoo Kim, Hong Kunho, YoonHyuk Kim
In an integrated WLAN and cellular network, if all mobile users whose connections originate in the cellular network migrate to the WLAN whenever they enter the double coverage area, the WLAN will be severely congested and its users will suffer from

Performance Metrics for IEEE 802.21 Media Independent Handover (MIH) Signaling

March 2, 2009
Author(s)
David W. Griffith, Richard A. Rouil, Nada T. Golmie
The IEEE 802.21 Media Independent Handover (MIH) working group is developing a set of mechanisms to facilitate migration of mobile users between access networks that use different link-layer technologies. Among these are mobility managers that create and

Security Challenges in Seamless Mobility - How to ``Handover'' the Keys?

November 30, 2008
Author(s)
Katrin Hoeper, Lidong Chen, Antonio Izquierdo Manzanares, Nada T. Golmie
In this paper, we discuss key management challenges for seamless handovers across heterogeneous wireless networks. We focus on fast access authentication protocols that allow expedited network entry by utilizing existing keying material from previous

Using the EAP Framework for Fast Media Independent Handover Authentication

November 17, 2008
Author(s)
Antonio Izquierdo Manzanares, Nada T. Golmie, Katrin Hoeper, Lidong Chen
In this paper we compare different authentication techniques that may be used in order to reduce the time and resources required to perform a handover, namely, re-authentication and pre-authentication. We provide a detailed analysis of each mechanism, and

Timely Effective Handover Mechanism in Heterogeneous Wireless Networks

November 13, 2008
Author(s)
Sang J. Yoo, David E. Cypher, Nada T. Golmie
Next-generation wireless networks should be able to coordinate and integrate different communication systems. It has been a challenging problem to support a seamless handover in these diverse wireless network environments. Link level triggers can provide

QOS-Aware Channel Scanning for IEEE 802.11 Wireless LAN

September 15, 2008
Author(s)
Nada T. Golmie, Sang-Jo Yoo
Channel scanning is an important aspect of seamless handovers since it is required in order to find a target point of attachment (PoA). In the IEEE 802.11 WLAN, scanning of other channels causes service disruptions with the current AP so that the provided

A Call Admission Control Algorithm for WLAN in Heterogeneous Wireless Networks

June 25, 2007
Author(s)
SuKyoung Lee, David W. Griffith, Kyungsoo Kim, Nada T. Golmie
One major challenge in the integration of wireless LAN (WLAN) and cellular networks is call admission control (CAC). Without a suitable CAC mechanism for the integrated network, the two networking systems will work independently and cannot simultaneously

Adaptive Channel Scanning for IEEE 802.16e

October 23, 2006
Author(s)
Richard A. Rouil, Nada T. Golmie
In this article we propose an adaptive algorithm that determines the duration and frequency of channel scanning in order to facilitate the discovery of neighboring base stations and handovers across multiple IEEE 802.16 networks. The proposed algorithm

Unsupervised Anomaly Detection System Using Next-Generation Router Architecture

October 1, 2006
Author(s)
Richard A. Rouil, Nicolas Chevrollier, Nada T. Golmie
Unlike many intrusion detection systems that rely mostly on labeled training data, we propose a novel technique for anomaly detection based on unsupervised learning and we apply it to counter denial-of-service attacks. Initial simulation results suggest

Effective Link Triggers to Improve Handover Performance

September 11, 2006
Author(s)
Steve Woon, Nada T. Golmie, Y. A. Sekercioglu
Effective link layer triggering is key in order to enable fast and reliable handover across different access networks. In this paper, we investigate the use of signal strength as part of the trigger mechanism. We propose an analytical model to estimate the

Prevailing Over Wires in Healthcare Environments: Benefits and Challenges

April 1, 2006
Author(s)
David E. Cypher, Nicolas Chevrollier, Nicolas Montavont, Nada T. Golmie
The objectives of this article are to survey the benefits and challenges that poise the deployment and operation of wireless communications in support of healthcare networks. While the main advantages of wireless communications remain to provide ubiquitous

Handovers and Interference Mitigation in Healthcare Environments

October 17, 2005
Author(s)
Nicolas Chevrollier, Nicolas Montavont, Nada T. Golmie
In this article, we consider candidate wireless technologies such as IEEE 802.11b, and IEEE 802.15.4 that can support medical and healthcare informatics applications. The main questions that we try to answer are: (1) is there any potential for significant
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