Journal
IEEE COMMUNICATIONS LETTERS
Volume 17, Issue 7, Pages 1340-1343Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2013.052013.122902
Keywords
Homogenous Poisson point process; secure connectivity probability; cooperative wireless networks
Categories
Funding
- Major National Science and Technology Projects [2010ZX03006-002-04]
- Project of Natural Science Foundations of China [61001107]
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In this letter, we study the problem of secure connectivity for colluding eavesdropper using randomize-and-forward (RF) strategy in cooperative wireless networks, where the distribution of the eavesdroppers is a homogenous Poisson point process (PPP). Considering the case of fixed relay, the exact expression for the secure connectivity probability is obtained. Then we obtain the lower bound and find that the lower bound gives accurate approximation of the exact secure connectivity probability when the eavesdropper density is small. Based on the lower bound expression, we obtain the optimal area of relay location and the approximate farthest secure distance between the source and destination for a given secure connectivity probability in the small eavesdropper density regime. Furthermore, we extend the model of fixed relay to random relay, and get the lower bound expression for the secure connectivity probability.
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