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Neumann A.,Routek SL | Lopez E.,Polytechnic University of Catalonia | Navarro L.,Polytechnic University of Catalonia
Computer Networks | Year: 2015

In recent years, we have witnessed the exponential growth of wireless community networks as a response to the clear necessity of Internet access for participation in society. For wireless mesh networks that can scale up to thousands of nodes, which are owned and managed in a decentralized way, it is imperative for their survival to provide the network with self-management mechanisms that reduce the requirements of human intervention and technological knowledge in the operation of a community network. In this paper, we focus on one important self-management mechanism, routing, and we study the scalability, performance, and stability of three proactive mesh routing protocols: BMX6, OLSR, and Babel. We study different metrics on an emulation framework and on the W-ILab.T testbed at iMinds, making the most of the two worlds. Emulation allows us to have more control over the topology and more systematically repeat the experiments, whereas a testbed provides a realistic wireless medium and more reliable measurements, especially in terms of interference and CPU consumption. Results show the relative merits, costs, and limitations of the three protocols. © 2015 Elsevier B.V. All rights reserved.

Baig R.,Fundacio Privada per la Xarxa Lliure | Freitag F.,Polytechnic University of Catalonia | Moll A.,Routek SL | Navarro L.,Polytechnic University of Catalonia | And 2 more authors.
2016 International Conference on Computing, Networking and Communications, ICNC 2016 | Year: 2016

Wireless networks have shown to be a cost effective solution for an IP-based communication infrastructure in under-served areas. Services and application, if deployed within these wireless networks, add value for the users. This paper shows how cloud infrastructures have been made operational in a community wireless network, as a particular case of a community cloud, developed according to the specific requirements and conditions of the community. We describe the conditions and requirements of such a community cloud and explain our technical choices and experience in its deployment in the community network. The user take-up has started, and our case supports the tendency of cloud computing moving towards the network edge. © 2016 IEEE.

Baig R.,Fundacio Privada per la Xarxa Lliure | Freitag F.,Polytechnic University of Catalonia | Moll A.,Routek SL | Navarro L.,Polytechnic University of Catalonia | And 2 more authors.
Proceedings - 2015 IEEE/ACM 8th International Conference on Utility and Cloud Computing, UCC 2015 | Year: 2015

Cloud federation is foreseen to happen among large cloud providers. The resulting interoperability of cloud services among these providers will then increase even more the elasticity of cloud services. The cloud provisioned that is targeted by this scenario is mainly one which combines the cloud services offered by large enterprises. Cloud computing, however, has started moving to the edge. We now increasingly see the tendency to fullfil cloud computing requirements by multiple levels and different kind of infrastructures, where the Fog Computing paradigm has started playing its role. For this scenario of edge computing, we show in this paper the case of the federation of multiple independent micro-cloud providers within a community network, where providers pool their resources and services into a community cloud. Federation happens here primarily at the service level and the domain of trust is the community of practice. While we can today already report this case in the context of community networks, IPv6 deployment in the Internet will principally allow micro-cloud providers to appear everywhere, needing cloud federation mechanisms. We describe for a real case how this micro-cloud provider federation has been built and argue why micro-cloud provider should be considered for the integration in cloud federations. © 2015 IEEE.

Baig R.,Fundacio Guifi.net | Navarro L.,Polytechnic University of Catalonia | Freitag F.,Polytechnic University of Catalonia | Pueyo R.,Routek SL | And 2 more authors.
ACM DEV-6 2015 - Proceedings of the 2015 Annual Symposium on Computing for Development | Year: 2015

The advent of community networks has shown that citizens can take action not only at the technical level to expand the Internet but also at the governance level. What started as isolated and uncoordinated efforts to, mainly, bring connectivity to undeserved areas (using hacked WiFi devices - the so called Wireless communities) has evolved into self-organised groups offering effective tools to empower people to self-satisfy their telecommunication needs under sustainable alternative models to the dominant one in the global Internet. Inspired by the success of community networks we propose the community network cloud (community cloud) as an instrument to fight the threat posed by the concentration of vast amount of data in few multinational corporations (privacy, vendor lock-in, etc.) and to make the use of the community network infrastructure more efficient. © 2015 ACM.

Pueyo Centelles R.,Routek SL | Oncins V.,Routek SL | Neumann A.,Routek SL
Computer Networks | Year: 2015

This article discusses the Network Characterization Daemon (NCD), a piece of software that provides users of Community Mesh Networks (CMNs) with an interactive tool to monitor, evaluate and fine-tune their network nodes. First, CMNs are introduced as a particular case of Community Networks (CNs), and their participation challenges are analysed. The NCD is then discussed as a novel solution that provides CMN end users with mechanisms to assess network performance and improve their quality of experience by modifying their devices' network configuration. The relation of the NCD with Quick Mesh Project (qMp) and the BatMan-eXperimental version 6 (BMX6) routing protocol is detailed as part of the social and technological context. The NCD also provides an experimentation framework to evaluate network performance in real-life CMNs. The latter part of this article covers the experiments performed using the NCD to assess network performance (in terms of path selection, Round-Trip Time (RTT), etc.) when different BMX6 routing policies are applied. The results show how, under different traffic conditions (e.g. distinct packet sizes), using specific routing policies leads to an improvement in network performance. Finally, the integration of the NCD in qMp is discussed, in order to ensure its long-term sustainability. © 2015 Elsevier B.V. All rights reserved.

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