Fundamental Analysis of Full-Duplex Full Duplex Gains in Wireless Networks
Abstract: duplex radio technology is becoming mature and holds potential to boost the Full-duplex spectrum efficiency of a point-to-point point point wireless link. However, a fundamental understanding is still lacking, with respect to its advantages over half-duplex half in multi-cell wireless eless networks with contending links. In this paper, we establish a spatial stochastic framework to analyze the mean network throughput gain from full duplex, and pinpoint the key factors that determine the gain. Our framework extends classical stochastic geometry analysis with a new tool set, which allows us to model a tradeoff between the benefit from concurrent full-duplex full transmissions and the loss of spatial reuse, particularly for CSMA-based CSMA transmitters with random backoff. We analytically derive closed closed-form expressions for the full-duplex duplex gain as a function of link distance, interference range, network density, and carrier sensing schemes. It can be easily applied to guide the deployment choices in the early stage of network planning.