Research ArticleOpen accessIn the author namesJitter Characterization in Admission Control and Pricing Issues in Integrated Multiservice NetworksFabien Houéto, Samuel PierreThis paper analyses the pricing framework of multiservice networks and proposes an improved pricing scheme based on the effective bandwidth concept for taking into account quality of service parameters. Based on the deficiencies noted in the classical effective bandwidth scheme (intolerance to user uncertainty and no guarantee on jitter), we propose an improved charging function which gives more flexibility to … …Journal of Computer Science, Vol. 3, Issue 12 · 31 Dec 2007 · 7,028 accessesView PDFCite
Research ArticleOpen accessIn the author namesA Novel Service Mobility Architecture for SIP EnvironmentsThierno Bah, Samuel Pierre, Roch GlithoLately, the proliferation of small portable devices has driven the introduction of a new mobility concept called service mobility. In order to support service mobility, we introduce a new architecture implementing mechanisms to access end user’s personalized services regardless of his physical location. The proposed architecture leverages on mobile agent technology to transport and move services to the end user’s … …Journal of Computer Science, Vol. 3, Issue 8 · 31 Aug 2007 · 6,818 accessesView PDFCite
Research ArticleOpen accessIn the author namesAn Improved Resource Reservation ProtocolDesire Oulai, Steven Chamberland, Samuel PierreThe classical resource reservation protocol (RSVP) is a flow-based signaling protocol used for reserving resources in the network for a given session. RSVP maintains state information for each reservation at every router along the path. Even though this protocol is very popular, he has some weaknesses. Indeed, RSVP does not include a bidirectional reservation process and it requires refresh messages … …Journal of Computer Science, Vol. 3, Issue 8 · 31 Aug 2007 · 6,488 accessesView PDFCite
Research ArticleOpen accessIn the author namesA Secure Protocol Based on a Sedentary Agent for Mobile Agent EnvironmentsAbdelmorhit E. Rhazi, Samuel Pierre, Hanifa BouchenebThe main challenge when deploying mobile agent environments pertains to security issues concerning mobile agents and their executive platform. This paper proposes a secure protocol which protects mobile agents against attacks from malicious hosts in these environments. Protection is based on the perfect cooperation of a sedentary agent running inside a trusted third host. Results show that the protocol detects … …Journal of Computer Science, Vol. 3, Issue 1 · 31 Jan 2007 · 6,878 accessesView PDFCite
Research ArticleOpen accessIn the author namesSeparation of the Control Plane and Forwarding Plane in Next-Generation RoutersRachid N. Takourout, Samuel Pierre, Laurent MarchandEver since the Internet appeared, network elements, such as routers, have been enhanced with much functionality. They tend to increasingly integrate more services, such as support and security mechanisms, which ensure Quality of Service. Similarly, processor performance continues to increase rapidly. Thus, these two types of evolution trigger the concept of separating the Control plane and the Forwarding plane in … …Journal of Computer Science, Vol. 2, Issue 11 · 30 Nov 2006 · 6,577 accessesView PDFCite
Research ArticleOpen accessIn the author namesA Network Management Framework Using Mobile AgentsJonathan Lefebvre, Steven Chamberland, Samuel PierreNetwork management of heterogeneous networks is still hard to achieve automatically and efficiently. In this study, we present a framework that has the ability to perform network management tasks on heterogeneous networks using mobile agents. This framework handles the inability of many network devices to run mobile agents. While the main focus of the project is the framework, we present … …Journal of Computer Science, Vol. 2, Issue 8 · 31 Aug 2006 · 7,026 accessesView PDFCite
Research ArticleOpen accessIn the author namesRedundancy Schemes for High Availability Computer ClustersChristian K. Bassek, Samuel Pierre, Alejandro QuinteroThe primary goal of computer clusters is to improve computing performances by taking advantage of the parallelism they intrinsically provide. Moreover, their use of redundant hardware components enables them to offer high availability services. In this paper, we present an analytical model for analyzing redundancy schemes and their impact on the cluster’s overall performance. Furthermore, several cluster redundancy techniques are … …Journal of Computer Science, Vol. 2, Issue 1 · 31 Jan 2006 · 7,229 accessesView PDFCite
Research ArticleOpen accessIn the author namesHome Agent Architecture and Algorithms for Mobility Management in Mobile IP NetworksMarcellin Diha, Samuel PierreThis study proposes new Home Agent architecture and algorithms for real-time mobility management in mobile IP networks. The proposed architecture and algorithms offer a better performance based on the call-to-mobility ratio (CMR) and require less time for the location update and the tunneling compared with the Mobile IP model. These results are very useful and interesting for a real-time context … …Journal of Computer Science, Vol. 2, Issue 1 · 31 Jan 2006 · 6,899 accessesView PDFCite
Research ArticleOpen accessIn the author namesTowards a Scalable File System on Computer Clusters Using DeclusteringVu Anh Nguyen, Samuel Pierre, Dougoukolo KonaréThis study addresses the scalability issues involving file systems as critical components of computer clusters, especially for commercial applications. Given that wide striping is an effective means of achieving scalability as it warrants good load balancing and allows node cooperation, we choose to implement a new data distribution scheme in order to achieve the scalability of computer clusters. We suggest … …Journal of Computer Science, Vol. 1, Issue 3 · 30 Sep 2005 · 6,516 accessesView PDFCite