Date Added: Jul 2012
This paper studies Quorum Systems (QS) and relevant properties, originally and widely used in the scope of operating systems and currently being applied in wireless communications. The objective of this paper is threefold. This paper gives a comprehensive guidance on QSs and their usage. And it shows that QS properties give an interesting alternative towards an asynchronous communication in Cognitive Radio Ad Hoc Networks (CRANs). Thanks to QS properties applicability in CRANs, nodes do not need to be dependent on the existence of a Common Control Channel (CCC), perfect synchronization or central controller, as it is frequently assumed in the current literature.