| Title |
Optimal Power Allocation via Linear Programming for Physical Layer Security:Multiple-Eavesdropper and Multicasting Scenarios in Multi-Hop Relay Networks |
| Authors |
이종호(Jong-Ho Lee) ; 신오순(Oh-Soon Shin) |
| DOI |
https://doi.org/10.5573/ieie.2020.57.1.15 |
| Keywords |
Physical layer security ; relay networks ; power allocation ; linear programming ; secrecy rate ; |
| Abstract |
In this paper, we consider power allocation problems for physical layer security in wireless multi-hop decode-and-forward (DF) relay networks. First, we formulate a power allocation problem for a multiple-eavesdropper scenario, where secure communication of one source-destination pair is assisted by multi-hop DF relays in the presence of multiple eavesdroppers. It is shown that the optimal power allocation can be obtained by linear programming (LP). Next, a power allocation problem is formulated in a secure multicasting scenario, where a source sends a common message to multiple destinations with the help of multi-hop DF relays in the presence of a single eavesdropper. It is also shown that the power allocation problem in the secure multicasting scenario is a LP problem. Numerical results are presented to investigate the secrecy rates achieved by the proposed optimal power allocation strategies in multiple-eavesdropper and multicasting scenarios. |