Random Access with Opportunity Detection in Wireless Networks

TL;DR

This paper introduces a novel MAC protocol that predicts transmission opportunities to optimize access, reduce interference, and improve throughput in wireless networks, especially in full-duplex systems.

Contribution

It presents a new opportunity detection-based MAC protocol with a derived fixed-point equation for optimal transmission probability, enhancing network performance.

Findings

Significant throughput gains in full-duplex networks.

Closed-form approximation for optimal transmission probability.

Effective interference reduction through opportunity-based access.

Abstract

This letter proposes a novel random medium access control (MAC) based on a transmission opportunity prediction, which can be measured in a form of a conditional success probability given transmitter-side interference. A transmission probability depends on the opportunity prediction, preventing indiscriminate transmissions and reducing excessive interference causing collisions. Using stochastic geometry, we derive a fixed-point equation to provide the optimal transmission probability maximizing a proportionally fair throughput. Its approximated solution is given in closed form. The proposed MAC is applicable to full-duplex networks, leading to significant throughput improvement by allowing more nodes to transmit.