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The Internet of Things (IoT) vision requires increasingly more sensor nodes interconnected and a network solution that may accommodate these requirements accordingly. In wireless sensor networks, there are energy-limited devices; therefore techniques to save energy have become a significant research trend. Other issues such as latency, range coverage, and bandwidth are important aspects in IoT. It...
A heterogeneous system is based on an integration of different types of networks. In this paper, a system based on LTE and WIMAX for the Virtual University of Senegal is presented. It aims to study and optimize the system performance considering the Signal to Interference plus Noise Ratio (SINR), the blocking probability, user communications, and mobility loss. A Markov chain was used to assess and...
It is known that by incorporating network function virtualization (NFV) in inter-datacenter (inter-DC) networks, we can use the network resources more intelligently to deploy new services faster. This paper considers an inter-DC elastic optical network (IDC-EON) and studies how to orchestrate the multicast-oriented NFV trees (M-NFV-Ts) in it efficiently. We first consider an offline scenario in which...
Vehicular communications are emerging as a promising technology to enable communications using vehicles as network nodes. VDTNs appear as a novel approach to enable services and applications where it is not possible to define an end-to-end path. To allow communications in such challenging environments, VDTNs rely for their operation on cooperation between network nodes, which contributes to increasing...
Future Internet Testbed with Security (FITS) is a testbed for experimenting Next-Generation Internet proposals that provides two virtualization schemes based on Xen and on OpenFlow. Experimenting new protocol proposals for the Future Internet requires a realistic condition environment for packet forwarding. FITS nodes are spread in Brazilian and European universities. In this paper, we present FITS...
This paper analyses the performance of a new routing protocol for vehicular delay-tolerant networks, called GeoSpray. This geographic routing protocol performs a store-carry-and-forward, combining replication and forwarding/ routing decisions based on location information, with explicit delivery acknowledgments to improve network resources utilization. The performance of the proposed routing protocol...
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