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Truth-telling mechanism for two-way relay selection for secrecy communications with energy-harvesting revenue
journal contribution
posted on 2017-07-20, 15:46 authored by Muhammad R. Khandaker, Kai-Kit Wong, Gan ZhengThis paper brings the novel idea of paying the utility to the winning agents in terms of some physical entity in cooperative communications. Our setting is a secret two-way communication channel where two transmitters exchange information in the presence of an eavesdropper. The relays are selected from a set of interested parties such that the secrecy sum rate is maximized. In return, the selected relay nodes’ energy harvesting requirements will be fulfilled up to a certain threshold through their own payoff so
that they have the natural incentive to be selected and involved in the communication. However, relays may exaggerate their private information in order to improve their chance to be selected. Our objective is to develop a mechanism for relay selection that enforces them to reveal the truth since otherwise they may be penalized. We also propose a joint cooperative relay beamforming and transmit power
optimization scheme based on an alternating optimization approach. Note that the problem is highly non-convex since the objective function appears as a product of three correlated Rayleigh quotients.
While a common practice in the existing literature is to optimize the relay beamforming vector for given transmit power via rank relaxation, we propose a second-order cone programming (SOCP)-based
approach in this paper which requires a significantly lower computational task. The performance of the incentive control mechanism and the optimization algorithm has been evaluated through numerical simulations.
Funding
This work is supported by EPSRC under grant EP/K015893/1.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
IEEE Transactions on Wireless CommunicationsVolume
16Issue
5Pages
3111 - 3123Citation
KHANDAKER, M.R., WONG, K.-K. and ZHENG, G., 2017. Truth-telling mechanism for two-way relay selection for secrecy communications with energy-harvesting revenue. IEEE Transactions on Wireless Communications, 16 (5), pp. 3111-3123.Publisher
IEEEVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/Acceptance date
2017-02-09Publication date
2017Notes
This is an Open Access Article. It is published by IEEE under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/ISSN
1536-1276Publisher version
Language
- en