The Gaussian Diamond-Wiretap Channel With Conferencing Relays

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In this letter, we consider the Gaussian diamond-wiretap channel with conferencing links between relays for the following three cases: 1) both conferencing links are confidential; 2) both conferencing links are public; and 3) one conferencing link is confidential, the other link is public, and the legitimate parties do not know which link is confidential or public. For all the cases, we establish the exact secure degrees of freedom (d.o.f.). Our results show that if at least one of conferencing links is confidential, the secure d.o.f. improves upon the case of no conferencing. In these cases of fully and partially confidential conferencing, it is shown to be sufficient to use the conferencing links only for transmitting noise symbols. On the other hand, if conferencing information is fully revealed to the eavesdropper, it is shown that there is no gain in secure d.o.f. due to conferencing, even if the conferencing information is also known to the legitimate destination.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2016-07
Language
English
Article Type
Article
Citation

IEEE COMMUNICATIONS LETTERS, v.20, no.7, pp.1393 - 1396

ISSN
1089-7798
DOI
10.1109/LCOMM.2016.2558145
URI
http://hdl.handle.net/10203/272815
Appears in Collection
EE-Journal Papers(저널논문)
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