Full-Duplex Duplex MIMO in Cellular Networks: System System-Level Level Performance
Abstract: This paper characterizes, through a stochastic geometry analysis, the increase in spectral efficiency that full full-duplex duplex transmission brings about in wireless networks. While, on isolated links, full full-duplex duplex promises a doubling of the spectral efficiency, in the context of a network this is weighted down by the corresponding rise in interference, and our characterization captures the balance of these effects. The analysis encompassess both the forward link (FL) and the reverse link (RL) with single-user user and multiuser transmissions. And, as a complement to the analysis, Monte-Carlo Carlo simulations on a Vodafone LTE field test network are also presented. In the FL, the rise in interference is found to have minor impact and a doubling in spectral efficiency can indeed be approached, especially in microcellular networks. In the RL, however, a major difficulty arises in the form of exceedingly strong interference among base stations. This rende renders full-duplex duplex transmission all but unfeasible in macrocellular networks (unless major countermeasures could be implemented) and undesirable in dense microcellular networks. Only in microcells with sufficient spacing among base stations does RL full-duplex full duplex pay off. Thus, fullduplex is seen not to blend easily with densification.