A stochastic model for misbehaving relays in cooperative diversity

Sintayehu Dehnie, Nasir Memon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Existing cooperative diversity protocols are designed with the inherent assumption that users exhibit cooperative behavior all the time. However, in a practical cooperative wireless system users may misbehave in malicious or selfish manner. Thus existing cooperative diversity protocols are inherently vulnerable to misbehaving users as they lack a mechanism to detect the presence of such users. In this paper we examine the physical layer consequences of a malicious user which exhibits cooperative behavior in a stochastic manner. We assume that the malicious user exploits the inherent uncertainty of the wireless channel to hide its malicious behavior. We consider a malicious user which exhibits cooperative and malicious behaviors according to firstorder Markov chain. By behaving stochastically the malicious user attempts to mimic the underlying Markov property of Rayleigh fading channels. Based on this model we examine physical layer performance of cooperative Detect-and-Forward (DF). We show that a malicious user incurs significant degradation in cooperative diversity gain. Our results indicate that misbehaving users may pose formidable challenge to practical implementation of cooperative diversity. Hence, it may be difficult to implement practical wireless cooperative networks without a mechanism to ensure cooperation.

Original languageEnglish (US)
Title of host publicationWCNC 2008 - IEEE Wireless Communications and Networking Conference, Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages482-487
Number of pages6
ISBN (Print)9781424419968
DOIs
StatePublished - 2008
EventIEEE Wireless Communications and Networking Conference, WCNC 2008 - Las Vegas, NV, United States
Duration: Mar 31 2008Apr 3 2008

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
ISSN (Print)1525-3511

Other

OtherIEEE Wireless Communications and Networking Conference, WCNC 2008
CountryUnited States
CityLas Vegas, NV
Period3/31/084/3/08

ASJC Scopus subject areas

  • Engineering(all)

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