# Investigating Master-Slave Architecture for Underwater Wireless Sensor Network
## 4 System Model
### Restricting Extra Reception of Packets:
We compared the performance of our proposed protocol with the closely related state-of-the-art Weighting Depth Forwarding Area Division Depth-Based Routing (WDFAD-DBR) protocol. Our simulation results demonstrated that ERPMSA-UWSN performs better than the WDFAD-DBR, i.e., an improvement of 13% on energy tax and 4.8% on PDR, on average, is achieved. In addition, the hidden terminal problem and the traffic overhead are controlled by suppressing the reproduction of data packets in the network which reduces the energy consumption. The existence of an energy hole or the absence of the potential forwarding node in the transmission range is still a challenging parameter resulting in slightly decreased reliability. Figure 14: (**a**) PDR against the number of nodes; (**b**) energy tax in comparison to the number of nodes; (**c**) end-to-end delay against the number of nodes; (**d**) APD vs. number of nodes. Comparison of ERPMSA-UWSN for 7 and 9 sinks. In future, sinking mobility can be added to the proposed routing scheme that may result in further decreasing the Accumulated Propagation Distance (APD) and End-to-End delay. Conceptualization, S.J. and Z.W. ; methodology, E.Y. ; software, R.A. and H.W.K. ; validation, S.J., Z.W. and A.H.; formal analysis, S.H. ; investigation, S.H. and H.W.K. ; resources, E.Y. ; data curation, S.J. and R.A.; writing--original draft preparation, S.J. ; writing--review and editing, Z.W. ; visualization, S.H. ; supervision, Z.W. ; project administration, A.H.; funding acquisition, E.Y. All authors have read and agreed to the published version of the manuscript. This research received no external funding. The authors declared no conflict of interest. ## References

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