Relay Selection and Secure Connectivity Analysis in Energy Harvesting Multi-Hop D2D Networks
Guangzhen Si, Zheng Dou, Yun Lin, Lin Qi, Meiyu Wang
Abstract
The relay is harvesting energy for data transmission and eavesdropping attacks will occur. Considering carried energy and security of relay, this letter studies relay selection in energy harvesting multi-hop D2D networks with an eavesdropper. To improve the secure connectivity performance of the relay, the higher bound of source-to-destination secrecy connectivity probability (SCP) is derived. Then, we derive the factor directly related to the largest SCP. Then, a relay selection algorithm is proposed to find a higher security connectivity relay path. Our theoretical derivation and the proposed algorithm are verified by Monte Carlo simulation results. The simulation results show that the proposed algorithm exhibit significantly higher SCP than the direct transmission method and conventional relay selection algorithms.