Physical Layer Security: Coalitional Games for Distributed Cooperation

Abstract : Cooperation between wireless network nodes is a promising technique for improving the physical layer security of wireless transmission, in terms of secrecy capacity, in the presence of multiple eavesdroppers. While existing physical layer security literature answered the question “what are the link-level secrecy capacity gains from cooperation?”, this paper attempts to answer the question of “how to achieve those gains in a practical decen- tralized wireless network and in the presence of a secrecy capacity cost for information exchange?”. For this purpose, we model the physical layer security cooperation problem as a coalitional game with non-transferable utility and propose a distributed algorithm for coalition formation. Through the proposed algorithm, the wireless users can autonomously cooperate and self-organize into disjoint independent coalitions, while maximizing their secrecy capacity taking into account the security costs during information exchange. We analyze the resulting coalitional structures, discuss their properties, and study how the users can self-adapt the network topology to environmental changes such as mobility. Simulation results show that the proposed algorithm allows the users to cooperate and self-organize while improving the average secrecy capacity per user up to 25.32% relative to the non-cooperative case.
Document type :
Conference papers
Complete list of metadatas

Cited literature [18 references]  Display  Hide  Download

https://hal-supelec.archives-ouvertes.fr/hal-00392324
Contributor : Samir Medina Perlaza <>
Submitted on : Sunday, June 7, 2009 - 12:49:00 PM
Last modification on : Thursday, August 1, 2019 - 2:12:06 PM
Long-term archiving on : Thursday, June 10, 2010 - 10:17:19 PM

File

Paper10.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-00392324, version 1

Collections

Citation

Walid Saad, Han Zhu, Tamer Basar, Merouane Debbah, Are Hjorungnes. Physical Layer Security: Coalitional Games for Distributed Cooperation. 7th Intl. Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, Jun 2009, Seoul, North Korea. 8 p. ⟨hal-00392324⟩

Share

Metrics

Record views

196

Files downloads

135