Mobi-cliques for improving ergodic secrecy in fading wiretap channels under power constraints

We consider a cooperative secret communication scenario, in which a group of mobile and power constrained nodes, acting as relays, cooperatively transmit to a destination in the presence of an eavesdropper; both destination and eavesdropper are assumed stationary. The cooperative scheme entails motion control and optimal communication, in order to achieve a prescribed level of ergodic secrecy rate. The group of motion-controlled cooperating relays is here termed as mobi-clique. Under this setting, a novel, decentralized motion control scheme is derived, which effectively drives the relays to a formation configuration, so that a prescribed expected secrecy requirement is met, while at the same time the utilization of network resources is maximized. The effectiveness of the proposed approach is verified both theoretically and through numerical simulations.

[1]  Wade Trappe,et al.  Managing the Mobility of a Mobile Sensor Network Using Network Dynamics , 2008, IEEE Transactions on Parallel and Distributed Systems.

[2]  Imre Csiszár,et al.  Broadcast channels with confidential messages , 1978, IEEE Trans. Inf. Theory.

[3]  David Tse,et al.  Mobility increases the capacity of ad-hoc wireless networks , 2001, Proceedings IEEE INFOCOM 2001. Conference on Computer Communications. Twentieth Annual Joint Conference of the IEEE Computer and Communications Society (Cat. No.01CH37213).

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

[5]  Wade Trappe,et al.  Mobile network management and robust spatial retreats via network dynamics , 2005, IEEE International Conference on Mobile Adhoc and Sensor Systems Conference, 2005..

[6]  Athina P. Petropulu,et al.  Controlling groups of mobile beamformers , 2012, 2012 IEEE 51st IEEE Conference on Decision and Control (CDC).

[7]  A. Lee Swindlehurst,et al.  Fixed SINR solutions for the MIMO wiretap channel , 2009, 2009 IEEE International Conference on Acoustics, Speech and Signal Processing.

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

[9]  Gregory W. Wornell,et al.  Secure Transmission With Multiple Antennas—Part II: The MIMOME Wiretap Channel , 2010, IEEE Transactions on Information Theory.

[10]  Athina P. Petropulu,et al.  Mobile jammers for secrecy rate maximization in cooperative networks , 2013, 2013 IEEE International Conference on Acoustics, Speech and Signal Processing.

[11]  George J. Pappas,et al.  Potential Fields for Maintaining Connectivity of Mobile Networks , 2007, IEEE Transactions on Robotics.

[12]  Shih-Chun Lin,et al.  On Ergodic Secrecy Capacity of Multiple Input Wiretap Channel with Statistical CSIT , 2012, ArXiv.

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

[14]  Shih-Chun Lin,et al.  On Secrecy Capacity of Fast Fading Multiple-Input Wiretap Channels With Statistical CSIT , 2012, IEEE Transactions on Information Forensics and Security.

[15]  Gregory W. Wornell,et al.  Secure Transmission With Multiple Antennas I: The MISOME Wiretap Channel , 2010, IEEE Transactions on Information Theory.