Dynamic spectrum sharing for cognitive radio networks using multiagent system

Dynamic spectrum sharing is a promising technique to optimize the spectrum utilization. It allows the cognitive radio (CR) nodes to access the available spectrum dynamically, without being restricted to static usage. In this paper, we propose multiagent system (MAS) based solutions to achieve licensed and unlicensed dynamic spectrum sharing. Firstly, we present a cooperative approach where the CR nodes embarked with agents are capable of performing spectrum sharing by exchanging a series of messages with the neighboring licensed devices. While analyzing the performance of this proposal under ad-hoc wireless conditions, we show that it achieves good performance in term of spectrum access, without incurring greater communication cost. Then, we focus on enabling unlicensed spectrum sharing between the CR users. Our proposed solutions can achieve good performance while maintaining fair spectrum distribution.