Showing papers by "Alessio Botta published in 2008"
TL;DR: A performance evaluation and measurement of a number of heterogeneous end-to-end paths taking into account a wide range of statistics and it is shown how the measured statistics can be fruitfully used in the context of network control and management.
49 citations
19 May 2008
TL;DR: The results indicate that the proposed approach for multipath data transmission over wireless networks improves both delay and loss characteristics of end-to-end wireless communications outperforming the classical multi-path schemes including Round Robin and Join the Shortest Queue.
Abstract: Maintaining performance and reliability in wireless networks is a challenging task due to the nature of wireless channels. Multipath data transmission has been used in wired scenarios to reduce latency, improve throughput, and - when/where possible - balance the load. In this paper, we propose an approach for multipath data transmission over wireless networks. We demonstrate that the problem under study can be formulated as a Markov decision process (MDP) and we propose an algorithm called On-line Policy Iteration (OPI), to solve the formulated MDP in real time. We verified the proposed approach using simulations with ns-2 and data collected from real heterogeneous wired/wireless networks. The results indicate that we improve both delay and loss characteristics of end-to-end wireless communications outperforming the classical multi-path schemes including Round Robin and Join the Shortest Queue.
9 citations
TL;DR: An approach to the identification of each element composing an end-to-end path, based on Bayesian classifiers, shows that a blind identification of network bricks is possible and that its results present a good degree of generalizability.
7 citations
08 Dec 2008
TL;DR: An experimental analysis of different boards for networked embedded systems using both general-purpose and network processors, and running both commercial and open source operating systems shows that network-processor based boards are able to attain very high performance when compared to boards based on x86 processors, especially when running commercial operating systems.
Abstract: Networked embedded systems are gaining more and more attention and their use in current network scenarios is of indisputable importance. Research community and industry are proposing novel embedded solutions, often based on network processors, for network connectivity, data processing and service delivery. Despite this, quantitative performance comparisons of such systems seem to be very hard to find. In this paper, we describe an experimental analysis of different boards for networked embedded systems using both general-purpose and network processors, and running both commercial and open source operating systems. The results show that network-processor based boards are able to attain very high performance when compared to boards based on x86 processors, especially when running commercial operating systems. The analysis provides a reference for the design, development, and testing of novel networked embedded systems.
4 citations
09 Dec 2008
TL;DR: This paper describes how the efforts to integrate UMTS connectivity into a PlanetLab-based testbed were made, in the context of the OneLab European project, in order to mitigate the lack of heterogeneity in terms of access technologies.
Abstract: Planetlab is widely recognized as being one of the most important Internet-scale testbeds. However, while allowing experimentations involving hundreds of hosts spread all over the world, PlanetLab still suffers of a few significant limitations. One of these limitations is the lack of heterogeneity, in particular in terms of access technologies. In this paper we describe the efforts we made, in the context of the OneLab European project, in order to mitigate this problem. In particular, we describe how we managed to integrate UMTS connectivity into a PlanetLab-based testbed. We illustrate the technical challenges we had to face, the final result we obtained, and present a case study meant to show the utility of having UMTS connectivity available in Planetlab.
3 citations
TL;DR: Insight is provided on how to plan and design efficient wireless backhaul networks by describing the work breakdown and the lessons learned from the design and deployment process, and a comprehensive performance evaluation is performed.
3 citations
01 Jan 2008
2 citations