In this paper, a secure cognitive device-to-device (D2D) communications in cellular networks are considered, where the D2D transmitter (Alice) communicates with the D2D receiver (Bob) using the spectrum of the primary base station (BS). The D2D eavesdropper (Eve) illegitimately attempts to receive the signal from Alice. This system considers an in-band underlay scheme of D2D communications where Alice is expected to communicate with Bob without exceeding threshold interference power at primary network BS. Considering the case of the Nakagami fading channel, an exact analysis for the power transfer between the power beacon (PB) and Alice is performed, and an analytical expression for power outage probability has been derived. New analytical expressions for secrecy throughput at various constraints have been derived. It has been noted that the secrecy throughput increases when higher values of information time fraction are used when transmitting power at a PB is high. Under improved fading constraints, it can be concluded that the secrecy throughput is enhanced when energy harvesting and information processing times are equal. Optimization of information transmission has also been carried out, and an analytical expression for optimal fraction time is determined. The numerical results presented are found to be in concurrence with the analytical expressions derived.
D2D Communications with Energy Harvesting: An Optimal Secrecy Throughput Perspective
2024-06-24
738456 byte
Conference paper
Electronic Resource
English
Energy Harvesting Communications
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