Comparative Analysis of Full Duplex and Half Duplex Relay for High-Speed Vehicular Scenario

摘要

In vehicular communication, high mobility causes frequent signal variation, which results in frequent handover and poor quality of service for vehicular users. Installing a relay on the top of the vehicle is a promising technology for overcoming these issues because these relays compensate the Vehicle Penetration Loss. Also, due to the deployment of next-generation networks and low-power nodes, network density and heterogeneity are increasing. As a result, interference is also increasing. Therefore, in the past, the performance of cooperative user in vehicular scenarios was analyzed using an amplify-and-forward (AF) mode based half-duplex (HD) relay in a heterogeneous network (HetNet). But the performance of HD relay is limited due to transmission capacity and bandwidth efficiency. In this paper, we use the AF mode based full-duplex (FD) relay in HetNet to analyze the performance of cooperative user in terms of coverage probability and outage capacity and, we compare the results with the AF mode based HD relay in vehicular scenario. Simulation results show that the performance of the FD relay depends on residual self-interference (RSI) in HetNet, and it outperforms the HD relay for the low value of RSI. The results are analyzed using both the analytical method and Monte Carlo simulation. These results provide the theoretical support for the deployment of relays in next-generation networks with high mobility scenario.