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Ubiquitous sensing applications often involve the sensor based data collection with a large coverage in space in and time. From a return on investment perspective the value of information needs to be attractive with the cost of infrastructure to acquire it. The role of participative sensing and human centric sensing has been widely explored for collecting and analyzing data for use in social science,...
This paper describes some applications under development for optical wireless systems based on visible light communications (VLC). The indoor scenario defines services which can be provided to users inside a room such as video broadcasting or home automation. For this purpose a 2Mbps visible downlink and a 125 kbps infrared uplink were used. In this work, we present the Ethernet interface that has...
This paper presents the existing Radio over Fiber (RoF) architectures and focuses on the control and management plane of the Remote Antenna Unit (RAU). Broadband wireless standards, such as WiMAX and LTE, incorporate optical technologies following the distributed base station concept. The control and management of the RAU becomes a critical task, since it can facilitate allocation of resources, configuration...
This paper compares two path selection strategies for optical burst switching networks: a) the path from source to destination is chosen randomly from the set of the k shortest paths; b) the path selection is based on a probabilistic model for the link demands. In the second strategy, the set of shortest paths from source to destination is ranked according to the probability of their overall link...
This paper identifies the major challenges faced in designing energy efficient wireless sensor networks. It was shown that energy optimization must be done at all levels including network, sensor node, and powering methods. A specific procedure for designing free space optics remote powering was described and the use of free space optics in wireless sensor network communication has been investigated.
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