Secrecy Performance Analysis and Enhancement Scheme for Time Switching-Based Relaying Protocol under Outdated Channel State Information 


Vol. 44,  No. 4, pp. 678-684, Apr.  2019
10.7840/kics.2019.44.4.678


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  Abstract

In this paper, we propose a secure relaying protocol to reflect time-varying nature of wireless channel. In order to extend the lifetime of the battery in the relay, the relay harvests the energy from surrounding RF signals by using a time switching method. The relay is also assumed to be an untrusted relay, which assists in the transmission of the source’s information but does not allow the reading of it. Therefore, the destination transmits the jamming signal when the source sends the information signal to the relay. The destination decodes the signal from the relay after the jamming signal cancellation. However, there is a time difference between the channel when the jamming signal is transmitted by the destination and the channel when the relay transmits the signal to the destination, then it causes the residual jamming signal at the destination after the cancellation process. In the presence of the residual jamming signal, we derive the outage probability and the ergodic secrecy rate, which are key indicators of secure communication performance, and obtain the optimal jamming power ratio and the optimal time switching ratio. Simulation shows that the proposed scheme is superior to the conventional scheme.

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  Cite this article

[IEEE Style]

J. Lim, K. Lee, I. Ra, "Secrecy Performance Analysis and Enhancement Scheme for Time Switching-Based Relaying Protocol under Outdated Channel State Information," The Journal of Korean Institute of Communications and Information Sciences, vol. 44, no. 4, pp. 678-684, 2019. DOI: 10.7840/kics.2019.44.4.678.

[ACM Style]

Jin-Taek Lim, Kisong Lee, and In-Ho Ra. 2019. Secrecy Performance Analysis and Enhancement Scheme for Time Switching-Based Relaying Protocol under Outdated Channel State Information. The Journal of Korean Institute of Communications and Information Sciences, 44, 4, (2019), 678-684. DOI: 10.7840/kics.2019.44.4.678.

[KICS Style]

Jin-Taek Lim, Kisong Lee, In-Ho Ra, "Secrecy Performance Analysis and Enhancement Scheme for Time Switching-Based Relaying Protocol under Outdated Channel State Information," The Journal of Korean Institute of Communications and Information Sciences, vol. 44, no. 4, pp. 678-684, 4. 2019. (https://doi.org/10.7840/kics.2019.44.4.678)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880