ABSTRACT
Cognitive radio technology is an efficient solution to enhance the spectral utilization, which takes advantage of residual resources of underutilized channels by an opportunistic use of the spectrum. A cognitive vehicular network allows the cognitive radio to benefit from holes or white spaces presented in the spectrum and admits an opportunistic access that searches for the best wireless communication channel available. This Chapter presents an overview of important technologies used to allow data dissemination in these networks. The topics herein addressed are: (i) data dissemination and communication; (ii) general broadcasting protocols; and (iii) potential data dissemination applications.
