Energy Harvesting for Physical-Layer Security in OFDMA Networks

In this paper, we study the simultaneous wireless information and power transfer in downlink multiuser orthogonal frequency-division multiple access systems, where each user applies power splitting to coordinate the energy harvesting and secrecy information decoding processes. Assuming equal power allocation across subcarriers, we formulate an optimization problem to maximize the aggregate harvested power of all users while satisfying secrecy rate requirements of individual users by joint subcarrier allocation and power splitting ratio selection. Due to the NP-hardness of the problem, we propose two suboptimal algorithms to solve the problem. The first one is an iterative algorithm that optimizes subcarrier allocation and power splitting ratios by an alternating way in dual domain. The second algorithm is based on a two-step approach that allocates subcarriers and selects power splitting ratios sequentially. The numerical results show that the proposed methods outperform the conventional methods and provide good trade offs between performance and complexity.

[1]  Derrick Wing Kwan Ng,et al.  Robust Beamforming for Secure Communication in Systems With Wireless Information and Power Transfer , 2013, IEEE Transactions on Wireless Communications.

[2]  Xianbin Wang,et al.  Physical-Layer Security with Multiuser Scheduling in Cognitive Radio Networks , 2013, IEEE Transactions on Communications.

[3]  Rui Zhang,et al.  MIMO Broadcasting for Simultaneous Wireless Information and Power Transfer , 2011, IEEE Transactions on Wireless Communications.

[4]  A. Lee Swindlehurst,et al.  Detecting passive eavesdroppers in the MIMO wiretap channel , 2012, 2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP).

[5]  A. D. Wyner,et al.  The wire-tap channel , 1975, The Bell System Technical Journal.

[6]  Laurence B. Milstein,et al.  An RF Receiver Detection Technique for Cognitive Radio Coexistence , 2010, IEEE Transactions on Circuits and Systems II: Express Briefs.

[7]  Roy D. Yates,et al.  Secret Communication with a Fading Eavesdropper Channel , 2007, 2007 IEEE International Symposium on Information Theory.

[8]  Kee Chaing Chua,et al.  Secrecy Wireless Information and Power Transfer With MISO Beamforming , 2013, IEEE Transactions on Signal Processing.

[9]  Derrick Wing Kwan Ng,et al.  Energy-Efficient Resource Allocation for Secure OFDMA Systems , 2012, IEEE Transactions on Vehicular Technology.

[10]  Meixia Tao,et al.  Optimization Framework and Graph-Based Approach for Relay-Assisted Bidirectional OFDMA Cellular Networks , 2010, IEEE Transactions on Wireless Communications.

[11]  Peter Richtárik,et al.  Iteration complexity of randomized block-coordinate descent methods for minimizing a composite function , 2011, Mathematical Programming.

[12]  Qiang Li,et al.  Spatially Selective Artificial-Noise Aided Transmit Optimization for MISO Multi-Eves Secrecy Rate Maximization , 2013, IEEE Transactions on Signal Processing.

[13]  Meixia Tao,et al.  Resource Allocation with Subcarrier Pairing in OFDMA Two-Way Relay Networks , 2011, IEEE Wireless Communications Letters.

[14]  Rui Zhang,et al.  Wireless Information and Power Transfer in Multiuser OFDM Systems , 2013, IEEE Transactions on Wireless Communications.

[15]  Roy D. Yates,et al.  Secrecy capacity of independent parallel channels , 2009 .

[16]  Shlomo Shamai,et al.  Secure Communication Over Fading Channels , 2007, IEEE Transactions on Information Theory.

[17]  Xiaodong Wang,et al.  Information and Energy Cooperation in OFDM Relaying: Protocols and Optimization , 2015, IEEE Transactions on Vehicular Technology.

[18]  Martin E. Hellman,et al.  The Gaussian wire-tap channel , 1978, IEEE Trans. Inf. Theory.

[19]  Wei Yu,et al.  Dual methods for nonconvex spectrum optimization of multicarrier systems , 2006, IEEE Transactions on Communications.

[20]  Meixia Tao,et al.  Power and Subcarrier Allocation for Physical-Layer Security in OFDMA-Based Broadband Wireless Networks , 2011, IEEE Transactions on Information Forensics and Security.

[21]  Zhu Han,et al.  Improving Wireless Physical Layer Security via Cooperating Relays , 2010, IEEE Transactions on Signal Processing.

[22]  Matthieu R. Bloch,et al.  Wireless Information-Theoretic Security , 2008, IEEE Transactions on Information Theory.

[23]  Kee Chaing Chua,et al.  Wireless Information and Power Transfer: A Dynamic Power Splitting Approach , 2013, IEEE Transactions on Communications.

[24]  Erik G. Larsson,et al.  Simultaneous Information and Power Transfer for Broadband Wireless Systems , 2012, IEEE Transactions on Signal Processing.

[25]  Osvaldo Simeone,et al.  On the Transfer of Information and Energy in Multi-User Systems , 2012, IEEE Communications Letters.

[26]  J.Vinoth Kumar,et al.  Optimal Channel and Relay Assignment in OFDM-Based Multi-Relay Multi-Pair Two-Way Communication Networks , 2016 .

[27]  Athina P. Petropulu,et al.  On Ergodic Secrecy Rate for Gaussian MISO Wiretap Channels , 2011, IEEE Transactions on Wireless Communications.

[28]  Claude E. Shannon,et al.  Communication theory of secrecy systems , 1949, Bell Syst. Tech. J..

[29]  Meixia Tao,et al.  A Network Flow Approach to Throughput Maximization in Cooperative OFDMA Networks , 2013, IEEE Transactions on Wireless Communications.

[30]  Liang Liu,et al.  Secrecy wireless information and power transfer in fading wiretap channel , 2014, 2014 IEEE International Conference on Communications (ICC).

[31]  Rohit Negi,et al.  Guaranteeing Secrecy using Artificial Noise , 2008, IEEE Transactions on Wireless Communications.

[32]  Zhi Chen,et al.  Max-Ratio Relay Selection in Secure Buffer-Aided Cooperative Wireless Networks , 2014, IEEE Transactions on Information Forensics and Security.

[33]  Sennur Ulukus,et al.  Achievable Rates in Gaussian MISO Channels with Secrecy Constraints , 2007, 2007 IEEE International Symposium on Information Theory.

[34]  Derrick Wing Kwan Ng,et al.  Secure Resource Allocation and Scheduling for OFDMA Decode-and-Forward Relay Networks , 2011, IEEE Transactions on Wireless Communications.

[35]  Kee Chaing Chua,et al.  Secrecy wireless information and power transfer with MISO beamforming , 2013, 2013 IEEE Global Communications Conference (GLOBECOM).

[36]  Meixia Tao,et al.  QoS-Aware Transmission Policies for OFDM Bidirectional Decode-and-Forward Relaying , 2013, IEEE Transactions on Wireless Communications.

[37]  Meixia Tao,et al.  Optimal Channel and Relay Assignment in OFDM-Based Multi-Relay Multi-Pair Two-Way Communication Networks , 2012, IEEE Transactions on Communications.

[38]  Rui Zhang,et al.  MIMO Broadcasting for Simultaneous Wireless Information and Power Transfer , 2013 .

[39]  Stephen P. Boyd,et al.  Convex Optimization , 2004, Algorithms and Theory of Computation Handbook.

[40]  Hesham El Gamal,et al.  On the Secrecy Capacity of Fading Channels , 2006, 2007 IEEE International Symposium on Information Theory.

[41]  Eduard A. Jorswieck,et al.  Resource allocation for the wire-tap multi-carrier broadcast channel , 2008, 2008 International Conference on Telecommunications.