Physical layer security: coalitional games for distributed cooperation
WiOPT'09 Proceedings of the 7th international conference on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
Relay selection for secure cooperative networks with jamming
IEEE Transactions on Wireless Communications
A distributed coalition formation framework for fair user cooperation in wireless networks
IEEE Transactions on Wireless Communications
Improving wireless physical layer security via cooperating relays
IEEE Transactions on Signal Processing
Cooperative Communications with Outage-Optimal Opportunistic Relaying
IEEE Transactions on Wireless Communications
The Relay–Eavesdropper Channel: Cooperation for Secrecy
IEEE Transactions on Information Theory
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In this paper, we investigate cooperation of conventional relays and friendly jammers subject to secrecy constraints for cooperative networks. In order to obtain an optimized secrecy rate, the source selects several conventional relays and friendly jammers from the intermediate nodes to assist data transmission, and in return, it needs to make a payment. Each intermediate node here has two possible identities to choose, i.e., to be a conventional relay or a friendly jammer, which results in a different impact on the final utility of the intermediate node. After the intermediate nodes determine their identities, they seek to find optimal partners forming coalitions, which improves their chances to be selected by the source and thus to obtain the payoffs in the end. We formulate this cooperation as a coalitional game with transferable utility and study its properties. Furthermore, we define a Max-Pareto order for comparison of the coalition value, based on which we employ the merge-and-split rules. We also construct a distributed merge-and-split coalition formation algorithm for the defined coalition formation game. The simulation results verify the efficiency of the proposed coalition formation algorithm.