Abstract
In the recent years, an interesting blending of computing, software technologies, sensors and even telecommunications concepts has facilitated the emergence of cognitive systems targeting various domains of applications.
Artificial systems that can interpret data arising from real-world events and processes (mainly in the form of data-streams from sensors of all types and from visual and/or audio sources); acquire situated knowledge of their environment; act, make or suggest decisions and communicate with people on human terms, thereby supporting them in performing complex tasks.
Cognitive radio is a paradigm for wireless communication in which either a network or a wireless node changes its transmission or reception parameters to communicate efficiently avoiding interference with licensed or unlicensed users. This alteration of parameters is based on the active monitoring of several factors in the external and internal radio environment, such as radio frequency spectrum, user behaviour and network state.
Cognition can be defined as the act or process of knowing in the broadest sense; specifically, an intellectual or artificial process by which knowledge is gained from perception. Respective concepts have impact in the evolution and emergence of cognitive communications and future internet elements. To this end, advances in various areas are identified towards building the knowledge and mechanisms for cognitive systems operation.