Investigation of ray-tracing accuracy in street cell environment for high-SHF and EHF bands

Recently, mobile networks employing high-speed high-capacity communications have been investigated extensively to satisfy the strong demand for the faster and larger data communication beyond 2020 as the 5th generation (5G) mobile communication system. As one of the approaches, high-SHF (6 - 30 GHz) and EHF (mainly 30 - 60 GHz) bands are the candidates to utilize the relatively wide frequency band widths. Accordingly, the characteristics of radio propagation loss in the frequency bands must be characterized. We investigate the characteristics of radio propagation loss in a street cell environment for high-SHF and EHF bands. For the purpose Ray-Tracing (RT) method is implemented and the accuracy of RT calculation is evaluated by comparing with measurement result. The trends of the accuracy are different between Line-of-Site (LOS) and Non Line-of-Site (NLOS) situations and between different routes. For further investigation, the number of rays in RT simulation is studied for the purpose of improving the accuracy.