arXiv:1403.7883 · IEEE Transactions on Information Forensics and Security

Multiple-Access Relay Wiretap Channel

Bin Dai, Zheng Ma

Published May 12, 2015• 17 citations

Abstract

In this paper, we investigate the effects of an additional trusted relay node on the secrecy of multiple-access wiretap channel (MAC-WT) by considering the model of multiple-access relay wiretap channel (MARC-WT). More specifically, first, we investigate the discrete memoryless MARC-WT. Three inner bounds [with respect to decode-and-forward (DF), noise-and-forward (NF), and compress-and-forward (CF) strategies] on the secrecy capacity region are provided. Second, we investigate the degraded discrete memoryless MARC-WT, and present an outer bound on the secrecy capacity region of this degraded model. Finally, we investigate the Gaussian MARC-WT, and find that the proposed relay strategies (DF, NF, CF strategies) help to enhance Tekin-Yener's achievable secrecy rate region of the Gaussian MAC-WT.

DOI: 10.1109/tifs.2015.2431992

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