No. | Name | Communication | Control technology | Modification | Operation |
1 | This Paper | Two-way | Robust & wireless | Possible | Digital |
2 | Ref [12] | Two-way | Robust | Possible | Digital |
3 | Ref [17] | Two-way | Robust | Possible | Digital |
4 | Ref [19] | Sensor based | Robust & wireless | Possible | Digital |
5 | Ref [23] | Multi-way | Robust | Possible | Digital & self-monitoring |
6 | Ref [25] | Two-way | Robust | Possible | Digital & self-monitoring |