Title :
A two-stage-game-based power control scheme for OFDMA-relay channels under physical layer security requirement
Author :
Hou, Zhao ; Wu, Dan ; Cai, Yueming
Author_Institution :
Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
Abstract :
In this paper, we develop a distributed power control scheme for relay channels with confidential message in an uplink OFDMA-relay cellular by Amplify-and-Forward mode. We introduce a two-stage game in a progressive optimization. In this scenario, the relay is considered not only as a sender that assists the information transmission, but also as an eavesdropper who can wiretap information. In the two steps, we design two different form of utility function for ensuring the reliability in the relay channel and enhancing the security capacity of each user. In addition, the existence of Nash Equilibrium in the two steps of the game model is confirmed. Simulation results demonstrate that the proposed scheme can effectively ensure the security capacity requirement for each user as well as achieve the fairness of power allocation in users, in addition of energy conservation.
Keywords :
OFDM modulation; amplify and forward communication; cellular radio; distributed parameter systems; energy conservation; frequency division multiple access; game theory; optimisation; power control; telecommunication control; telecommunication network reliability; Nash equilibrium; amplify-and-forward mode; confidential message; distributed power control scheme; energy conservation; information transmission; physical layer security requirement; power allocation; progressive optimization; relay channel reliability; two-stage-game scheme; uplink OFDMA-relay cellular mode; utility function; Base stations; Equations; Games; Mathematical model; Relays; Resource management; Security; Nash Equilibrium; OFDMA-relay systems; physical layer security; power allocation; progressive optimization; two-stage-game;
Conference_Titel :
Wireless Communications and Signal Processing (WCSP), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4577-1009-4
Electronic_ISBN :
978-1-4577-1008-7
DOI :
10.1109/WCSP.2011.6096814