Abstract
In this article, we suggest routing protocols with Energy Harvesting and adaptive transmit power for cognitive radio networks. the secondary source and relays harvest energy from wireless signal transmitted by node A. the transmitted power of secondary nodes is adapted so that interference to primary receiver ($$P_R$$) lower than interference threshold I. We suggest optimal routing that activates the best path between source and destination. Suboptimal routing is also considered where the network is decomposed in many subnetworks then the best path is activated in each subnetwork. One hop routing is also investigated where the best relay is selected in each subnetwork.
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