## 3 Design of SROA
### SROA Protocol Description
QELAR and GEDAR with new architecture that outperforms traditional architecture in terms of the energy consumption and end-to-end delay obviously. In addition, SROA performs better than other routing protocols (QELAR, GEDAR, HHVBF) when considering performance metrics, such as energy consumption, end-to-end delay, PDR and average hop count of delivered packages. For future work, we will try to deploy the proposed SROA in a real UWSN hardware platform since it is only evaluated in simulation software at current. Additionally, a multi-sink and AUV-aided architecture will be considered to coordinate packet transmission, aiming to improve the packet delivery ratio, avoid routing holes, and reduce end-to-end delay. Conceptualization, R.Z. and Q.Y. ; investigation X.H. ([PERSON]); Resources, X.H. ([PERSON]); writing, R.Z. and Q.Y. ; validation, D.L. ; methodology, R.Z. All authors have read and agreed to the published version of the manuscript. This work was supported in part by the National Natural Science Foundation of China under Grant 61862020 and Grant 62162021; in part by the Key Project of Hainan Province under Grant ZDYF2020199; in part by Scientific Research Set Up Fund of Hainan University under Grant KYQD(ZR)1877; in part by the Scientific Research Project of Hainan Province under Grant Hnky2022-4. Not applicable. The data that support the findings of this study are available from the corresponding author upon reasonable request. The authors would be grateful to the reviewers for their comments to improve the quality of this paper and would also like to thank the editors for their help with this paper. The authors declare no conflict of interest. ## References

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