Capture in wireless random-access networks with multiple destinations and a physical channel model

Abstract

The capture effect in wireless random-access networks has been widely studied in the literature. Under capture, a transmission is successfully received at the destination, even in the presence of other transmissions, if the received signal to interference ratio exceeds a threshold. However, most studies of capture are limited to single-destination networks (such as an isolated base station in a cellular network). In this paper, we study capture in wireless networks that have multiple destinations. We use simulation to evaluate throughput performance for different networks, and demonstrate the impact of the capture threshold as well as the impact of the user distribution. The novelty of our approach includes capture under a realistic physical layer model and under the multiple-destination architecture that creates interference among users who transmit to different destinations