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A Handshake-based Protocol Exploiting the Near-Far Effect in Underwater Acoustic Networks

We propose a scheme that opportunistically exploits
received power diversity across different packets to both favor
spatial reuse in underwater acoustic networks and limit the
exposed terminal problem. Since the power attenuation in the
underwater acoustic channel is large, such power differences are
common. This situation, also referred to as the near-far effect
and often considered a problem, is converted into a resource
by means of multipacket reception (MPR). Yet, even without
MPR capability our scheme offers performance benefits. Our
scheme is simple, lightweight and distributed, and can be easily
implemented over any protocol based on carrier-sense multiple
access with collision avoidance. Our results show that higher
throughput and lower transmission delay are achieved compared
to a benchmark channel access protocol. Our results are validated
and demonstrated in a lake experiment. To allow reproducibility,
the implementation of our scheme is publicly available.

Authors:

Roee Diamant, Paolo Casari, Filippo Campagnaro, Michele Zorzi

Published On:

IEEE Wireless Communications Letters

Publication Year:

2016

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