Spatial and Temporal Correlation of the Interference in ALOHA Ad Hoc Networks

TL;DR

This paper analyzes the spatial and temporal correlation of interference in ALOHA-based wireless ad hoc networks with Poisson-distributed nodes, highlighting its impact on network performance and retransmissions.

Contribution

It provides a quantitative analysis of interference correlation in ad hoc networks using ALOHA, a novel focus for understanding outage dependencies.

Findings

Interference exhibits significant temporal correlation affecting retransmissions.

Spatial correlation of interference influences routing decisions.

Quantitative models for interference correlation are developed.

Abstract

Interference is a main limiting factor of the performance of a wireless ad hoc network. The temporal and the spatial correlation of the interference makes the outages correlated temporally (important for retransmissions) and spatially correlated (important for routing). In this letter we quantify the temporal and spatial correlation of the interference in a wireless ad hoc network whose nodes are distributed as a Poisson point process on the plane when ALOHA is used as the multiple-access scheme.