Design an effective routing protocol in underwater
acoustic sensor networks (UASNs) is an important issue. Long
propagation time and low DATA rate which are two major
concerns for routing protocol design in UASNs will lead to the
long end-to-end transmission time. This paper proposes a SelfAdaptive
Cooperative Routing Protocol (SACRP) to effectively
route collecting DATA to the sink in UASNs. Cooperative transmission
in SACRP not only can enhance the link quality (Signalto-Noise
Ratio (SNR)) to improve the network throughput but
also can increase the transmission range of a node to reduce the
end-to-end transmission time. Some mathematical analyses about
cooperative transmission scheme are done to support SACRP
protocol in the different DATA size and transmission range as
well. Based on the network simulations, the proposed protocol,
SACRP, has a significant performance against the related work
in average end-to-end delay and packet delivery ratio.
