Elements of information theory
Elements of information theory
Information Theory and Reliable Communication
Information Theory and Reliable Communication
A note on the secrecy capacity of the multiple-antenna wiretap channel
IEEE Transactions on Information Theory
The worst additive noise under a covariance constraint
IEEE Transactions on Information Theory
Multiple-Access Channels With Confidential Messages
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
To Decode the Interference or to Consider It as Noise
IEEE Transactions on Information Theory
Relay selection for secure cooperative networks with jamming
IEEE Transactions on Wireless Communications
A New Relay and Jammer Selection Schemes for Secure One-Way Cooperative Networks
Wireless Personal Communications: An International Journal
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In cellular systems, confidentiality of uplink transmission with respect to eavesdropping terminals can be ensured by creating intentional interference via scheduling of concurrent downlink transmissions. In this paper, this basic idea is explored from an information-theoretic standpoint by focusing on a two-cell scenario where the involved base stations (BSs) are connected via a finite-capacity backbone link. A number of transmission strategies are considered that aim at improving uplink confidentiality under constraints on the downlink rate that acts as an interfering signal. The strategies differ mainly in the way the backbone link is exploited by the cooperating downlink to the uplink-operated BSs. Achievable rates are derived for both the Gaussian (unfaded) and the fading cases, under different assumptions on the channel state information available at different nodes. Numerical results are also provided to corroborate the analysis. Extensions to scenarios with more than two cells are briefly discussed as well. Overall, the analysis reveals that a combination of scheduling and base-station cooperation is a promising means to improve transmission confidentiality in cellular systems.