Control of Wireless Networks with Secrecy
We consider the problem of cross-layer resource allocation in time-varying cellular wireless networks, and incorporate information theoretic secrecy as a Quality of Service constraint. Specifically, each node in the network injects two types of traffic, private and open, at rates chosen in order to maximize a global utility function, subject to network stability and secrecy constraints. The secrecy constraint enforces an arbitrarily low mutual information leakage from the source to every node in the network, except for the sink node. We first obtain the achievable rate region for the problem for single and multi-user systems assuming that the nodes have full CSI of their neighbors. Then, we provide a joint flow control, scheduling and private encoding scheme, which does not rely on the knowledge of the prior distribution of the gain of any channel. We prove that our scheme achieves a utility, arbitrarily close to the maximum achievable utility.
Yunus Sarikaya received the B.S. and M.S. degrees in telecommunications from Sabanci University, Istanbul, Turkey, in 2006 and 2008, respectively, and is currently pursuing the Ph.D. degree in electrical engineering at the same university. His research interests include optimal control of wireless networks, stochastic optimization and information theoretical security.