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CORR
2008
Springer

Wireless Secrecy in Cellular Systems with Infrastructure--Aided Cooperation

13 years 3 months ago
Wireless Secrecy in Cellular Systems with Infrastructure--Aided Cooperation
In cellular systems, confidentiality of uplink transmission with respect to eavesdropping terminals can be ensured by creating intentional interference via scheduling of concurrent downlink transmissions. In this paper, this basic idea is explored from an information-theoretic standpoint by focusing on a two-cell scenario where the involved base stations are connected via a finite-capacity backbone link. A number of transmission strategies are considered that aim at improving uplink confidentiality under constraints on the downlink rate that acts as an interfering signal. The strategies differ mainly in the way the backbone link is exploited by the cooperating downlink- to the uplink-operated base stations. Achievable rates are derived for both the Gaussian (unfaded) and the fading cases, under different assumptions on the channel state information available at different nodes. Numerical results are also provided to corroborate the analysis. Extensions to scenarios with more than two ...
Petar Popovski, Osvaldo Simeone
Added 25 Dec 2010
Updated 25 Dec 2010
Type Journal
Year 2008
Where CORR
Authors Petar Popovski, Osvaldo Simeone
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