The SENSE-ME platform: Infrastructure-less smartphone connectivity and decentralized sensing for emergency management

Federated Learning With Cooperating Devices: A Consensus Approach for Massive IoT Networks

“…CFA extends FA and, similarly, requires each node to exchange only local model updates at most once per round. The overhead, or the size of Θ t,k , thus corresponds to the model size (11). For a generic DNN model of Q layers, the model W t,k size can be approximated in the…”

“…Next generation networks are expected to be underpinned by new forms of decentralized, infrastructure-less communication paradigms [11] enabling devices to cooperate directly over device-to-device (D2D) spontaneous connections (e.g., multihop or mesh). These networks are designed to operatewhen needed -without the support of a central coordinator, or with limited support for synchronization and signalling.…”

“…CFA extends FA and, similarly, requires each node to exchange only local model updates at most once per round. The overhead, or the size of Θ t,k , thus corresponds to the model size (11). For a generic DNN model of Q layers, the model W t,k size can be approximated in the order of O(d 1 d 2 Q) E. This is several order of magnitude lower than the size of the input training data, in typical ML and deep ML problems.…”

Design and performance evaluation of a LoRa-based mobile emergency management system (LOCATE)

“…Since 2000s, several studies have investigated the utilization of multi-hop Mobile Ad Hoc Networks (MANETs) in order to provide spontaneous connectivity on critical scenarios like the post-disaster ones, although the number of real-world deployments is limited [15]. More recently, the diffusion of end-user mobile devices, like smartphones and tablets, has paved the way toward next-generation ECS able to leverage the pervasiveness of such devices, and the availability of context-information about the emergency and the user [16], provided by the embedded sensors (e.g. GPS, accelerometer).…”

“…Regarding the network connectivity, it is worth remarking that most of Commercial Off-The-Shelf (COTS) smartphones do not enable the creation of MANETs for security reasons; however, they are equipped with Device to Device (D2D) communication technologies, like the Bluetooh Low Energy (BLE) [17] or the Wi-Fi Direct [18], enabling data exchange with other peers in the 1-hop neighborhood. Emergency-related mobile applications supporting opportunistic dissemination of alert messages on the 2.4 GHz ISM band have been proposed, among others, in [19] [20] [21]; similarly, routing schemes for multi-hop D2D phone-networks are described in [16] [22] [23]. At the same time, the target of these studies is often constituted by indoor scenarios where the distance among the users is assumed short (i.e.…”