Cooperative Cognitive Radio Network with Energy Harvesting: Stability Analysis

TL;DR

This paper analyzes the maximum stable throughput in a cooperative cognitive radio network where both primary and secondary users harvest energy, cooperate for data transmission, and optimize their energy and data queues for improved network stability.

Contribution

It provides a stability analysis framework for energy harvesting cooperative cognitive radio networks, considering queue dynamics and energy constraints for both users.

Findings

Derived conditions for maximum stable throughput.

Showed benefits of cooperation and energy harvesting on network stability.

Quantified throughput improvements with energy-aware cooperation strategies.

Abstract

This paper investigates the maximum stable throughput of a cooperative cognitive radio system with energy harvesting Primary User and Secondary User. Each PU and SU has a data queue for data storage and a battery for energy storage. These batteries harvest energy from the environment and store it for data transmission in next time slots. The SU is allowed to access the PU channel only when the PU is idle. The SU cooperates with the PU for its data transmission, getting mutual benefits for both users, such that, the PU exploits the SU power to relay a fraction of its undelivered packets, and the SU gets more opportunities to access idle time slots.