## 4 The Design of Routing Protocol
### Data Packet Forwarding
**Conflicts of Interest:** The authors declare no conflict of interest. ## References

* _[PERSON] et al. (2022)_ [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON]; et al. Ocean Remote Sensing Techniques and Applications: A Review (Part I). _Water_**2022**, _14_, 3400. [CrossRef]
* _[PERSON] et al. (2022)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; et al. Ocean Remote Sensing Techniques and Applications: A Review (Part II). _Water_**2022**, _14_, 3401. [CrossRef]
* [PERSON] (2012) [PERSON], M.C. An Overview of the Internet of Underwater Things. _J. Netw. Comput. Appl._**2012**, _35_, 1879-1890. [CrossRef]
* _[PERSON] et al. (2020)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]. Underwater Internet of Things in Smart Ocean: System Architecture and Open Issues. _IEEE Trans. Ind. Inform._**2020**, _16_, 4297-4307. [CrossRef]
* _[PERSON] et al. (2021)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] Toward the Internet of Underwater Things: Recent Developments and Future Challenges. _IEEE Consum. Electron. Mag._**2021**, _10_, 32-37. [CrossRef]
* _[PERSON] et al. (2021)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] Internet of Underwater Things and Big Marine Data Analytics--A Comprehensive Survey. _IEEE Commun. Surv. Tutor._**2021**, _23_, 904-956. [CrossRef]
* _[PERSON] et al. (2011)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON] A Survey on Routing Techniques in Underwater Wireless Sensor Networks. _J. Netw. Comput. Appl._**2011**, _34_, 1908-1927. [CrossRef]
* _[PERSON] et al. (2017)_ [PERSON]; [PERSON]; [PERSON] Routing Protocols Based on Node Mobility for Underwater Wireless Sensor Network (UWSN): A Survey. _J. Netw. Comput. Appl._**2017**, _78_, 242-252. [CrossRef]
* [PERSON] and [PERSON] (2019) [PERSON]; [PERSON] A Comprehensive Survey of Recent Routing Protocols for Underwater Acoustic Sensor Networks. _Sensors_**2019**, _19_, 4256. [CrossRef] [PubMed]
* _[PERSON] et al. (2021)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] A Survey of Routing Protocols for Underwater Wireless Sensor Networks. _IEEE Commun. Surv. Tutor._**2021**, _23_, 137-160. [CrossRef]
* _[PERSON] et al. (2010)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Efficient Vector-Based Forwarding for Underwater Sensor Networks. _[PERSON]. [PERSON]. Commun. Netw._**2010**, _2010_, 1-13. [CrossRef]
* _[PERSON] et al. (2007)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Improving the Robustness of Location-Based Routing for Underwater Sensor Networks. In Proceedings of the OCEANS 2007, Aberdeen, UK, 18-21 June 2007; pp. 1-6. * _[PERSON] et al. (2015)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]. A Novel Void Node Recovery Paradigm for Long-Term Underwater Sensor Networks. _Ad Hoc Netw._**2015**, _34_, 144-156. [CrossRef]
* _[PERSON] et al. (2021)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] An Adaptive-Location-Based Routing Protocol for 3-D Underwater Acoustic Sensor Networks. _IEEE Internet Things J._**2021**, \(6\), 8653-8684. [CrossRef]
* _[PERSON] et al. (2018)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Asynchronous Localization with Mobility Prediction for Underwater Acoustic Sensor Networks. _IEEE Trans. Veh. Technol._**2018**, _67_, 2543-2556. [CrossRef]
* _[PERSON] et al. (2008)_ [PERSON]; [PERSON]; [PERSON] [PERSON]-H. DBR: Depth-Based Routing for Underwater Sensor Networks. In _Networking 2008 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet_; [PERSON], [PERSON], [PERSON], [PERSON], [PERSON]; Springer: Berlin/Heidelberg, Germany, 2008; pp. 72-86. * _[PERSON] and [PERSON] (2012)_ [PERSON]; [PERSON] An Energy Efficient Localization-Free Routing Protocol for Underwater Wireless Sensor Networks. _Int. J. Distrib. Sens. Netw._**2012**, \(3\), 307246. [CrossRef]
* _[PERSON] et al. (2019)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Distance-Vector-Based Opportunistic Routing for Underwater Acoustic Sensor Networks.