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Time synchronization accuracy refinement for mobile shallow water acoustic sensor network
Pallarés Valls, Oriol; Río Fernandez, Joaquín del; Bouvet, Pierre-Jean
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. SARTI - Centre de Desenvolupament Tecnològic de Sistemes d'Adquisició Remota i Tractament de la Informació
Time synchronization is an important factor to take into account when performing collaborative and distributed tasks along a sensor network. Message exchange based time synchronization algorithms ported to underwater acoustic sensor networks, have to deal with high latency communications, besides frame Doppler scaling and frame detection at the receiver side, which are key points for an accurate synchronization. Furthermore, mobile sensor networks lead to different propagation times in a bidirectional message exchange, such as the ones used to synchronize two sensors. In addition to time synchronization algorithm, a first order kinematic model in conjunction with Doppler estimation can be applied to precise frame time stamping and avoid drift between clocks. In this paper we present a complete time synchronization scheme optimized for mobile network, tested in simulation and experimented in real tests demonstrating high performance in time synchronization accuracy.
Award-winning
Àrees temàtiques de la UPC::Enginyeria electrònica::Instrumentació i mesura::Sensors i actuadors
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
Oceanographic instruments
Sensor networks -- Programming
Network Time Protocol (Computer network protocol)
estimation theory
mobile communication
optimisation
synchronisation
underwater acoustic communication
wireless sensor networks
frame time stamping
Doppler estimation
first order kinematic model
bidirectional message exchange
frame detection
Doppler scaling
underwater acoustic sensor networks
mobile shallow water acoustic sensor network
time synchronization accuracy refinement
Sincronització
Xarxes de sensors
Comunicacions subacuàtiques
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Masmitjà Rusiñol, Ivan; Pallarés Valls, Oriol; Gomáriz Castro, Spartacus; Río Fernandez, Joaquín del; O’Reilly, T; Kieft, B