The cognitive radio (CR) concept has appeared as a promising technology to cope with the spectrum scarcity caused by increased\r\nspectrum demand due to the emergence of new applications. CR can be an appropriate mean to establish self-organization and\r\nsituation awareness at the radio interface, which is highly desired to manage unexpected situations that may happen in a disaster\r\nscenario. The scout node proposed in this paper is an extended concept based on a powerful CR node in a heterogeneous nodes\r\nenvironment which takes a leading role for highly flexible, fast, and robust establishment of cooperative wireless links in a disaster\r\nsituation. This node should have two components: one is a passive sensor unit that collects and stores the technical knowledge\r\nabout the electromagnetic environment in a data processing unit so-called ââ?¬Å?radio environment mapââ?¬Â in the form of a dynamically\r\nupdated database, and other is an active transceiver unit which can automatically be configured either as a secondary node for\r\nopportunistic communication or as a cooperative base station or access point for primary network in emergency communications.\r\nScout solution can be viable by taking advantage of the technologies used by existing radio surveillance systems in the context of\r\nCR.
Loading....