Substation RIS assisted coverage performance analysis and modeling simulation

Emerging services such as substation mobile inspection have higher requirements for wireless coverage quality. In order to improve the signal coverage capability in non-line-of-sight area, the indoor signal coverage performance analysis and modeling simulation with the assistance of Reconfigurable Intelligent Reflector (RIS) are carried out. According to the characteristics of RIS two cascaded sub-channels, Ray Tracing (RT) was used to process the signal and obtain the electromagnetic propagation characteristics. RIS performs phase control on the sent signal and then reflects it to the signal weak area. The receiving end receives the multipath information assisted by RIS to enhance the coverage performance. In order to reduce the computational cost of tracking, an approximate model based on non-reflective path is proposed. Finally, the received power, power delay spectrum, delay spread and calculation cost are simulated and compared respectively. The experimental results show that RIS assisted transmission can significantly improve the effective signal coverage, and the approximate model can achieve an effective compromise between accuracy and calculation time.