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Secure Broadcasting in Cooperative Cognitive Radio Networks
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0001-9456-8702
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
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2012 (English)In: 2012 Future Network and Mobile Summit, FutureNetw 2012, IIMC , 2012Conference paper, Published paper (Refereed)
Abstract [en]

This paper explores the trade-off between cooperation and secrecy in cognitive radio networks. We consider a scenario consisting of a primary and a secondary system. In the simplest case, each system is represented by a pair of transmitter and receiver. We assume a secrecy constraint on the transmission in the sense that the message of the primary transmitter has to be concealed from the secondary user. Both situations where the secondary transmitter is aware and unaware of the primary message are investigated and compared. Furthermore, we extend our results to the scenario where the secondary system comprises multiple users. For each case we sketch the derivation of the rates that are achievable from an information theoretic perspective. We then investigate the findings by numerical simulations. Our main result is that, in spite of the secrecy constraint, cooperation is beneficial in terms of the achievable rates. The secondary transmitter has the two contradicting tasks of helping the primary system and transmitting its own message. Our results show that both tasks can be accomplished simultaneously, improving both systems' performance. In particular, the secondary system can achieve a significant rate without decreasing the primary rate below the benchmark rate achievable without the help of the secondary transmitter. In the case of multiple secondary users, the rate region reduces, which results in a lower individual rate. However, the linear increase in sumrate counterbalances this effect.

Place, publisher, year, edition, pages
IIMC , 2012.
Keyword [en]
broadcast, Cognitive radio, cooperative communication, secrecy
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-91514Scopus ID: 2-s2.0-84867211423ISBN: 978-190582430-4 (print)OAI: oai:DiVA.org:kth-91514DiVA: diva2:510533
Conference
2012 21st Future Network and Mobile Summit, FutureNetw 2012; Berlin; 4 July 2012 through 6 July 2012
Funder
EU, FP7, Seventh Framework Programme, 248303ICT - The Next Generation
Note

QC 20121122

Available from: 2012-03-16 Created: 2012-03-16 Last updated: 2016-04-25Bibliographically approved

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Li, NanThobaben, RagnarRasmussen, Lars K.Skoglund, Mikeal

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Gabry, FrédéricLi, NanSchrammar, NicolasGirnyk, MaksymThobaben, RagnarRasmussen, Lars K.Skoglund, Mikeal
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