FiWi Enhanced LTE-A A HetNets With Reliable Low-Latency Low Latency Fiber Backhaul Sharing and WiFi Offloading
Abstract: To cope with the unprecedented growth of mobile data traffic, we investigate the performance gains obtained from unifying coverage coverage-centric centric 4G mobile networks and capacity-centric centric fiber fiber-wireless wireless (FiWi) broadband access networks based on data-centric centric Ethernet technologies with resulting fiber backhaul sharing and WiFi offloading capabilities. Despite recent progress on backhaul backhaul-aware 4G studies with capacity-limited limited backhaul links, the performance-limiting performance limiting impact of backhaul latency and reliability has not been examined in sufficient detail previously. In this paper, we evaluate the maximum aggregate throughput, offloading efficiency, and in particular, ular, the delay performance of FiWi enhanced LTE LTE-Advanced (LTE-A) heterogeneous networks (HetNets), including the beneficial impact of various localized fiber-lean lean backhaul redundancy and wireless protection techniques, by means of probabilistic analysis aand nd verifying simulation, paying close attention to fiber backhaul reliability issues and WiFi offloading limitations due to WiFi mesh node failures as well as temporal and spatial WiFi coverage constraints. We use recent and comprehensive smartphone traces of the PhoneLab data set to verify whether the previously reported assumption that the complementary cumulative distribution function of both WiFi connection and interconnection times fit a truncated Pareto distribution is still valid. In this paper, we put put a particular focus on the 5G key attributes of very low latency and ultra-high ultra high reliability and