Open AccessCooperative Decode‐and‐Forward Relaying for Secure Multicasting
Author(s) -
Lee JongHo,
Sohn Illsoo,
Song Sungju,
Kim YongHwa
Publication year - 2016
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.16.0115.1029
Subject(s) - multicast , computer science , semidefinite programming , beamforming , secrecy , maximization , computer network , mathematical optimization , mathematics , telecommunications , computer security
In this paper, secure multicasting with the help of cooperative decode‐and‐forward relays is considered for the case in which a source securely sends a common message to multiple destinations in the presence of a single eavesdropper. We show that the secrecy rate maximization problem in the secure multicasting scenario under an overall power constraint can be solved using semidefinite programing with semidefinite relaxation and a bisection technique. Further, a suboptimal approach using zero‐forcing beamforming and linear programming based power allocation is also proposed. Numerical results illustrate the secrecy rates achieved by the proposed schemes under secure multicasting scenarios.