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In this paper, we investigate the design of an optical wireless sensor network using laser beam reflection and optical wireless technology deployed on train to monitor and analyze the vibration patterns caused by the train motion on the rails it is using. Our architecture is based on measuring efficiently the train structure intrinsic vibration as well as the vibration due to the interaction between...
In this paper, we propose a landing and a take-off assistance network architecture based on optical wireless technologies combining visible light communication (VLC) and free space optics (FSO). The network is composed of LED sensors that are used to collect information about the state of the runway and relay it using VLC communication to two gateways that will recover the sensed information and transmit...
Unmanned Aerial Vehicles (UAV) are a possible future application for both civil and military use. The large amount of data generated by UAVs requires high data rate connectivity, which makes FSO communication very suitable. Thus, UAV in combination with Free Space Optics (FSO) is a new challenge and will be needed everywhere, where big amounts of data have to be delivered in real-time. In the frame...
This paper proposes all-optical wireless sensor network architecture based on visible light communication (VLC) and free space optics (FSO) technologies which targets the monitoring of railways health state to ensure the security of trains traffic. To this purpose, we design a technique for detecting rails vibration using light-based sensor nodes. The detection includes an estimation of the amplitude...
The all-optical switching node implementations are limited by the lack of optical memory. We present an optical switching node based on all-optical buffering. We propose the organization of the all-optical switching node in four blocks: input block, control block, buffering block and switching block. The virtual memory based on the two loops architecture implements the multi-wavelength concepts to...
In this paper, we propose a stateful optical filtering approach that allows session establishment and traffic flow filtering in the optical layer. Each traffic flow is identified by a unique identifier composed of a set of code words built on values of appropriately selected fields in the stream. In the firewall core node, a security policy is applied to the optical flow based on its identifier in...
We present a novel architecture of an all-optical multi-wavelength synchronizer for all-optical networks. This architecture aligns input flows on slot starting with a tunable fine precision in all-optical domain. Synchronization is performed by adding to the latecomer signals a controllable delay due to recirculations throw reducing size loop. Decision about the required delay is dynamically managed...
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