Topology Control and Routing in Mobile Ad Hoc Networks with Cognitive Radios

TL;DR

This paper introduces a distributed topology control scheme for cognitive radio-based mobile ad hoc networks, improving network reliability and performance by predicting link availability and optimizing routing.

Contribution

It proposes a novel Prediction-based Cognitive Topology Control (PCTC) scheme that integrates link prediction with topology management in CR-MANETs.

Findings

PCTC effectively predicts link availability considering primary user interference.

The scheme reduces re-routing frequency and enhances throughput.

Simulation results confirm improved delay and network reliability.

Abstract

Cognitive radio (CR) technology will have significant impacts on upper layer performance in mobile ad hoc networks (MANETs). In this paper, we study topology control and routing in CR-MANETs. We propose a distributed Prediction-based Cognitive Topology Control (PCTC) scheme to provision cognition capability to routing in CR-MANETs. PCTC is a midware-like cross-layer module residing between CR module and routing. The proposed PCTC scheme uses cognitive link availability prediction, which is aware of the interference to primary users, to predict the available duration of links in CR-MANETs. Based on the link prediction, PCTC constructs an efficient and reliable topology, which is aimed at mitigating re-routing frequency and improving end-to-end network performance such as throughput and delay. Simulation results are presented to show the effectiveness of the proposed scheme.