A fair and energy-efficient spectrum management mechanism for cognitive radio networks

This paper considers the spectrum management problem in a secondary cognitive radio network where secondary nodes in the network operate on a single channel. There is a leader node which is responsible for tasks such as primary detection, node coordination and channel scanning. Channels are sensed in the order of their detection probabilities. The leader node changes on each scan depending on the credit history generated using a fair credit based mechanism. It has been shown that the proposed scheme can achieve better energy efficiency in terms of overall low battery consumption, better fairness, and seamless switch over when migrating to another channel.