Effects of Vehicular Blockage on Latency in 5G mm Wave Systems with Dynamic Point Selection

Ahstract-5G millimeter wave(mmWave) systems are prone to blockage from various objects in the typical propagation environment. Among these, human blockage and vehicular blockage are more prominent scenarios that can lead to link failure. In this paper, we analyze the effect of vehicular blockage on 5G mmWave systems using stochastic geometric models. Using this analysis, we derive the blockage probability of the link and provide a relation to latency in communication with vehicular blockage in various scenarios. Further, we show and quantify the fact that with dynamic point selection (DPS) scheme where user maintains simultaneous links with geographically separated transmit and receive points (TRP), the coverage probability can be improved significantly and the latency due to blockage can be reduced. We analyze the blockage probability and latency for DPS system in terms of blocker density, length and typical speed of the vehicle and number of simultaneous links maintained by the user. The proposed analytical model is validated using system level simulations. We show the trade off between the number of simultaneous links and latency using these results which helps in 5G system design for latency critical applications.