Proceedings ArticleDOI
Optimizing Secrecy Performance of Trusted RF Relay against External Eavesdropping
TLDR
This paper studies the joint optimization of relay placement and power allocation to minimize the secrecy outage probability (SOP) for a four- node cooperative system with a trusted randomize- and-forward relay in the presence of an external eavesdropper.Abstract:
In resource allocation for secure cooperative communication systems, along with power allocation, relay placement also has equal importance in improving the system performance. In this paper, we study the joint optimization of relay placement and power allocation to minimize the secrecy outage probability (SOP) for a four- node cooperative system with a trusted randomize- and-forward relay in the presence of an external eavesdropper. Initially, we derive the expression of SOP, and then formulate an optimization problem to minimize SOP under given power budget and relay placement (RP) constraints. By providing analytical insights on power allocation (PA) between source and relay, we obtain closed form expressions of optimal PA (OPA) for a given RP that minimizes the SOP. Next, we propose a low complexity algorithm to obtain the near-optimal RP (ORP) for a given PA. Finally, we obtain optimal SOP with joint RP and PA. Numerical results present validation of analytical SOP through Monte Carlo simulations, optimal PA for a given RP, optimal RP for a given PA, and joint PA and RP for a given secrecy threshold rate. Finally, we highlight the significant performance gains achieved by the joint design over the conventional scheme.read more
Citations
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Book ChapterDOI
Privacy-Aware Physical Layer Security Techniques for Smart Cities
Ravikant Saini,Deepak Mishra +1 more
TL;DR: This chapter introduces the physical layer architectures suitable for the IoT and discusses the technological challenges associated with them, and presents novel optimization techniques and smart green cooperative protocols for maximizing security.
References
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Journal ArticleDOI
Relay Placement for Physical Layer Security: A Secure Connection Perspective
Jianhua Mo,Meixia Tao,Yuan Liu +2 more
TL;DR: In this paper, the problem of secure connection in cooperative wireless communication with two relay strategies, decode-andforward (DF) and randomize-and-forward (RF), was considered.
Posted Content
Relay Placement for Physical Layer Security: A Secure Connection Perspective
Jianhua Mo,Meixia Tao,Yuan Liu +2 more
TL;DR: This work derives the optimal power allocation for the DF strategy and finds that the RF strategy is always better than the DF to enhance secure connection and shows that without relay, it is difficult to establish secure connections from the base station to the cell edge users.
Journal ArticleDOI
Optimal Power Allocation for Secure Multicarrier Relay Systems
Cheol Jeong,Il-Min Kim +1 more
TL;DR: It is shown that the proposed suboptimal solution for secrecy rate maximization in a multicarrier decode-and-forward relay system is asymptotically optimal in the limit as the number of subcarriers goes to infinity.
Posted Content
On Secrecy Capacity Scaling in Wireless Networks
TL;DR: In this paper, the achievable secure rate per source-destination pair in wireless networks was studied, where the legitimate and eavesdropper nodes are assumed to be placed according to Poisson point processes with intensities of λ$ and λ_e, respectively.
Proceedings ArticleDOI
N-Dimension Golden Section Search: Its Variants and Limitations
TL;DR: A structured ndimension GSS and its variants are proposed and the limitations of n-D GSS are illustrated, which are very important for the future use of GSS.