A spectrum map based dynamic spectrum management framework

Dynamic spectrum management (DSM) of cognitive radio networks (CRNs) has been a hotspot for spectrum management departments as well as research community to alleviate spectrum scarcity problem. With the motive of facilitating CRNs with spectrum-related information with low cost in different scenarios including infrastructure less environment, this paper proposes a spectrum map based DSM (SMDSM) framework. Spectrum map is defined to provide external support for CRs with information including spectrum policy, spectrum availability, radio propagation characteristics, etc. The distribution scheme of spectrum map is designed for CRNs with and without infrastructure. Through the construction and distribution of spectrum map, SMDSM implements efficient spectrum management and provides spectrum information service for CRNs. The hardware in loop simulation system based on USRP and GNU radio is developed. Simulation results demonstrate that the DSM framework can make better use of spectrum and improve the system performance on throughput and delay.