Transport Capacity Analysis of Wireless In-Band Full Duplex Ad Hoc Networks

Abstract

This paper investigates the transport capacity of full-duplex ad hoc networks based on stochastic geometry. Unlike the more traditional half duplex nodes, full duplex wireless equipment can exchange data simultaneously over the same spectrum band. While full duplex transmission represents a promising mechanism to improve spectrum efficiency, the inevitable rise of interference from more transmitting nodes can also lower the rate of successful transmissions in ad hoc full duplex networks. We study the transport capacity of ad hoc full duplex networks by analyzing the successful packet decoding rate in both the physical link model and the protocol link model. We derive a new upper bound and a new lower bound for the network transport capacity, which can be used to lower complexity approximate analysis of the network transport capacity. We further determine the optimal transmission probability for maximizing network throughput and quantify the potential benefit of full duplex nodes. In both physical and protocol link models, our analysis shows that full duplex networks can nearly double the transport capacity against half duplex only with relatively small paired link distance. As the paired link distance grows, the transport capacity gain of full duplex networks begins to degrade.