We consider an underwater networking scenario, and test the performance of two multihop routing paradigms, source routing and hop-by-hop relay selection, in the presence of different representations of the channel dynamics. We focus on a static channel case (obtained via empirical equations for path-loss), and on a sequence of channel realizations obtained using ray tracing, that vary both slowly and rapidly over time with respect to the expected reaction time of routing protocols; the two latter cases are also explored in the presence both of a flat bottom and of a rough bottom with several seamounts, to yield a total of five different channel models. Our results show that channel variations induced by environmental changes over time have an impact on routing performance metrics in connected topologies. A sea bottom with a rough shape adds a further impact to the routing performance, which is shown to be larger for source routing. We conclude that while empirical channel models yield a good first-order approximation, the time-variability of the channel and the shape of the network area boundaries are to be taken into account in order to achieve more realistic network performance estimates. © 2012 IEEE.
A study on channel dynamics representation and its effects on the performance of routing in underwater networks / Paolo, Casari; Spaccini, Daniele; Giovanni, Toso; Beatrice, Tomasi; Petroccia, Roberto; Petrioli, Chiara; Michele, Zorzi. - ELETTRONICO. - (2012), pp. 1536-1540. (Intervento presentato al convegno Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR 2012) tenutosi a Pacific Grove, CA nel 4 November 2012 through 7 November 2012) [10.1109/acssc.2012.6489285].
A study on channel dynamics representation and its effects on the performance of routing in underwater networks
SPACCINI, DANIELE;PETROCCIA, Roberto;PETRIOLI, Chiara;
2012
Abstract
We consider an underwater networking scenario, and test the performance of two multihop routing paradigms, source routing and hop-by-hop relay selection, in the presence of different representations of the channel dynamics. We focus on a static channel case (obtained via empirical equations for path-loss), and on a sequence of channel realizations obtained using ray tracing, that vary both slowly and rapidly over time with respect to the expected reaction time of routing protocols; the two latter cases are also explored in the presence both of a flat bottom and of a rough bottom with several seamounts, to yield a total of five different channel models. Our results show that channel variations induced by environmental changes over time have an impact on routing performance metrics in connected topologies. A sea bottom with a rough shape adds a further impact to the routing performance, which is shown to be larger for source routing. We conclude that while empirical channel models yield a good first-order approximation, the time-variability of the channel and the shape of the network area boundaries are to be taken into account in order to achieve more realistic network performance estimates. © 2012 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.