In most of the works related to energy harvesting cognitive radio networks, the efficiency of energy-harvesting is very poor such that the harvested energy is not sufficient for transmission and retransmissions. In this paper, a Dynamic Slot Assignment model (DSAM) for Multi-hop Energy Harvesting Cognitive Radio Ad Hoc Networks (MEH-CRAHN) is designed. MEH-CRAHN consists of energy-harvesting secondary transmitters. In the proposed DSAM, multi hop energy harvesting relay nodes (EHR) help a primary transmitter (PT) to forward primary signals to a PR. In DSAM, the hop-by-hop packet transmission applies ARQ protocol with number of slots allocated dynamically based on the Packet Loss Rate (PLR) and packet error rate (PER) parameters. If PLR or PER are more than a maximum threshold, then the sender increases the harvesting duration of its slot so that the required energy will be harvested to retransmit the packet. The proposed framework is implemented in MATLAB and the performance metrics average throughput, Bit Error Rate (BER) and packet Loss Rate (PLR) are measured.
Volume 11 | 06-Special Issue
Pages: 439-446