Interference Analysis of Co-Existing Wireless Body Area Networks

Given the ever-increasing popularity of wireless body area networks (WBANs), in some application scenarios, many WBANs may operate densely and lead to a high mutual interference. Excessive interference may severely degrade the network performance, which is called the network co- existence problem. It is critical to fully understand the network co-existence problem to ensure the effectiveness and efficiency of WBANs. In this paper, we investigate the network interference and co-existence problem for the scenarios with densely deployed WBANs. Specifically, we model the probability distribution of interference among co- existing WBANs using the advanced Geometrical Probability approach. We then approximate the total inter-cell interference by a simple gamma distribution which is accurate according to the simulation results. We further use the interference distribution model to solve the practical network planning issues for WBANs. That is, we quantify the minimum network distance to ensure the signal to interference and noise ratio (SINR) for the boundary nodes and the average SINR of the whole system, respectively.