On physically secure and stable slotted ALOHA system

Authors:
Yunus Sarikaya;Ozgur Ercetin
Affiliations:
Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey;Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
Venue:
Allerton'09 Proceedings of the 47th annual Allerton conference on Communication, control, and computing
Year:
2009

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Abstract

In this paper, we consider the standard discrete-time slotted ALOHA with a finite number of terminals with infinite size buffers. In our study, we jointly consider the stability of this system together with the physical layer security. We conduct our studies on both dominant and original systems, where in a dominant system each terminal always has a packet in its buffer unlike in the original system. For N = 2, we obtain the secrecy-stability regions for both dominant and original systems. Furthermore, we obtain the transmission probabilities, which optimize system throughput. Lastly, this paper proposes a new methodology in terms of obtaining the joint stability and secrecy regions.