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For signaling and controlling a centralized Cognitive Radio Network (CRN) with users operating in different sets of channels, a dedicated common control channel is not a useful approach. Different strategies have been studied for this CRN control, some of them using time division mechanisms. This is because employing a channel per each Cognitive Radio User (CRU) for simultaneously controlling them is not efficient. However, for signaling specific events to all CRUs in a CRN, the Central Cognitive Base Station (CCBS) needs to communicate to all the operating devices in the CRN domain. Reducing the number of broadcast signaling channels is then a need for good performance and energy efficiency of the CRN.
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