chapter 1. Introduction to cognitive radio -- chapter 2. Spectrum sensing -- chapter 3. Cooperative spectrum acquisition -- chapter 4. Cooperative spectrum acquisition in the presence of interference -- chapter 5. Spectrum sensing : performance measures and design trade-offs -- chapter 6. Spectrum handoff -- chapter 7. MAC protocols in cognitive radio networks -- chapter 8. Cognitive radio ad hoc and sensor networks : network models and local control schemes -- chapter 9. Medium access in cognitive radio ad hoc networks -- chapter 10. Routing in multihop cognitive radio networks -- chapter 11. Economics of cognitive radio -- chapter 12. Security concerns in cognitive radio networks.