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On Security and reliability using cooperative transmissions in sensor networks

Aksu, A and Krishnamurthy, P and Tipper, D and Ercetin, O (2012) On Security and reliability using cooperative transmissions in sensor networks. Mobile Networks and Applications, 17 (4). 526 - 542. ISSN 1383-469X

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Cooperative transmissions have received recent attention and research papers have demonstrated their benefits for wireless networks. Such benefits include improving the reliability of links through diversity and/or increasing the reach of a link compared to a single transmitter transmitting to a single receiver (single-input single-output or SISO). In one form of cooperative transmissions, multiple nodes can act as virtual antenna elements and provide diversity gain or range improvement using space-time coding. In a multi-hop ad hoc or sensor network, a source node can make use of its neighbors as relays with itself to reach an intermediate node with greater reliability or at a larger distance than otherwise possible. The intermediate node will use its neighbors in a similar manner and this process continues till the destination is reached. Thus, for the same reliability of a link as SISO, the number of hops between a source and destination may be reduced using cooperative transmissions as each hop spans a larger distance. However, the presence of ma-licious or compromised nodes in the network impacts the benefits obtained with cooperative transmissions. Using more relays can increase the reach of a link, but if one or more relays are malicious, the transmission may fail. However, the relationships between the number of relays, the number of hops, and success probabilities are not trivial to determine. In this paper, we analyze this problem to understand the conditions under which cooperative transmissions fare better or worse than SISO transmissions. We take into consideration additional parameters such as the path-loss exponent and provide a framework that allows us to evaluate the conditions when cooperative transmissions are better than SISO transmissions. This analysis provides insights that can be employed before resorting to simulations or experimentation. © Springer Science+Business Media, LLC 2012.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Aksu, A
Krishnamurthy, Pprashk@pitt.eduPRASHK
Tipper, Ddtipper@pitt.eduDTIPPER0000-0002-9429-6425
Ercetin, O
Date: 1 August 2012
Date Type: Publication
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Journal or Publication Title: Mobile Networks and Applications
Volume: 17
Number: 4
Page Range: 526 - 542
Event Type: Conference
DOI or Unique Handle: 10.1007/s11036-012-0360-8
Institution: University of Pittsburgh
Schools and Programs: School of Information Sciences > Telecommunications
Refereed: Yes
ISSN: 1383-469X
Date Deposited: 25 Jun 2012 13:50
Last Modified: 03 Jun 2019 14:55


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