## 4 Proposed Method
### Coverage Hole Repair Based on Mobile Node Redeployment
#### 4.2.2 Calculate the Number of Mobile Sensors Required
(2023)_ [PERSON]; [PERSON]; [PERSON] Scheduling optimization for UAV communication coverage using virtual force-based PSO model. _Digit. Commu. Netw._**2023**, _in press._ [CrossRef]
* _[PERSON] et al. (2020)_ [PERSON]; [PERSON]; [PERSON] A type of virtual force-based energy-hole mitigation strategy for sensor networks. _IEEE Sens. J._**2020**, _20_, 1105-1119. [CrossRef]
* _[PERSON] et al. (2020)_ [PERSON]; [PERSON]; [PERSON] Design of coverage algorithm for mobile sensor networks based on virtual molecular force. _Comput. Commun._**2020**, _15_, 269-277. [CrossRef]
* _[PERSON] et al. (2020)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] Artificial intelligence-empowered path selection: A survey of ant colony optimization for static and mobile sensor networks. _IEEE Access_**2020**, \(8\), 71497-71511. [CrossRef]
* _[PERSON] et al. (2021)_ [PERSON]; [PERSON]; [PERSON] Coverage enhancement strategy for WSNs based on virtual force-directed ant lion optimization algorithm. _IEEE Sens. J._**2021**, _21_, 19611-19622. [CrossRef]
* _[PERSON] et al. (2020)_ [PERSON]; [PERSON]; [PERSON] Energy-efficient coverage enhancement strategy for 3-D wireless sensor networks based on a vampire bat optimizer. _IEEE Internet Things J._**2020**, \(7\), 325-338. [CrossRef]
* _[PERSON] et al. (2022)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] Coverage enhancement algorithm for WSNs based on vampire bat and improved virtual force. _IEEE Sens. J._**2022**, _22_, 8245-8256. [CrossRef]
* _[PERSON] et al. (2023)_ [PERSON]; [PERSON]; [PERSON] An efficient anti-intrusion detection algorithm based on MEP for directional sensor networks. _IEEE Sens. J._**2023**, _23_, 12224-12236. [CrossRef]
* _[PERSON] et al. (2019)_ [PERSON]; [PERSON]; [PERSON] Efficient approximation approaches to minimal exposure path problem in probabilistic coverage model for wireless sensor networks. _Appl. Soft. Comput._**2019**, _76_, 726-743. [CrossRef]
* _[PERSON] et al. (2020)_ [PERSON]; [PERSON]; [PERSON] Coverage maximization in wireless sensor networks using minimal exposure path and particle swarm optimization. _Sens. Imaging_**2020**, _21_, 4. [CrossRef]
* _[PERSON] et al. (2023)_ [PERSON]; [PERSON]; [PERSON] Coverage optimization for directional sensor networks: A novel sensor redeployment scheme. _IEEE Internet Things J._**2023**, _10_, 1461-1475. [CrossRef]
* _[PERSON] et al. (2024)_ [PERSON]; [PERSON]; [PERSON] Design of the sparrow search algorithm (SSA) for airborne radioactive hotspot detection. _Appl. Radiat. Isot._**2024**, _209_, 111333. [CrossRef] [PubMed]
* _[PERSON] et al. (2023)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] Coverage optimization strategy for 3-D wireless sensor networks based on improved sparrow search algorithm. _IEEE Sens. J._**2023**, _23_, 23721-23733. [CrossRef]
* _[PERSON] et al. (2023)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] An adaptive routing protocol for underwater acoustic sensor networks with ocean current. _IEEE Sens. J._**2023**, _23_, 28220-28243. [CrossRef]

**Disclaimer/Publisher's Note:** The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content.