Research and development on cognitive radio/dynamic spectrum access technologies

This paper summarizes needs, deployment scenarios, and fundamental system architecture with regard to cognitive radio/dynamic spectrum access (CR/DSA) technologies on the basis of latest Japanese frequency allocation environment. To realize the technology, National Institute of Information and Communications Technology (NICT) and a Japanese operator and some manufacturers have a project supported by Ministry of Internal Affairs and Communications (MIC) to research and develop enabling technologies on the CR/DSA equipments. This paper also summarizes the results.