Analysis of Self-Blockage Impact on Handover Probability for User with Mobility in 5G Mm-Wave Cellular Network

In this paper, we present the impact of self-blockage on Handover (HO) Probability for a user with mobility in a 5G mm-wave cellular network. Self-blockage is defined as a blockage that could occur for a Mobile User (MU) resulting from its own body during its movement. As a result, frequent HOs may occur, which could cause channel fluctuations between different states, namely, Line-of-Sight (LOS) state, Non-Line-of-Sight (NLOS) state and outage state. Since the human body causes a severe attenuation to the mm-wave signal, we assume that the MU’s body blocks any signal from any mm-wave BS that lies in the blocking zone. Consequently, all mm-wave BSs that lie in the blocking zone is considered blocked. In this paper, we present a mathematical analysis for the self-blockage impact on MU where the Self-blockage zone is modelled as a sector of a disc, centred at the origin and has a radius of R. The sector is making an angle of, $\theta$, towards the MU’s body. The results show that self-blockage has an impact on HO probability, especially when the MU is moving in a radial direction, as the MU direction becomes closer to the tagged mm-wave BS as the HO probability gets closer to the case where no self-blockage incorporated into the model. Since the mm-wave signal is very susceptible to blockages interruption, this paper’s work provides us insights on understanding the impact of self-blockage on the HO probability. Therefore, the effect of self-blockage on the HO probability needs to be considered carefully in designing efficient HO management schemes and planning the 5G mm-wave cellular system.