دانلود رایگان مقاله انگلیسی بررسی میزان ظرفیت تولید محرمانگی دقیق در شبکه های ادهاک موبایل - الزویر 2018

Abstract

The secrecy throughput capacity (STC) performance study of mobile ad hoc networks (MANETs) is critical for supporting their applications in securitysensitive scenarios. Despite much work on the scaling law results of MANET STC, the exact STC study of such networks remains an open problem. This paper, for the first time, investigates the exact STC of a cell-partitioned MANET with group-based scheduling scheme from the physical layer (PHY) security perspective. We first propose two secure transmission schemes based on the PHY security technology, i.e., secrecy guard zone based and cooperative jamming based schemes. The secrecy guard zone based scheme allows transmissions to be conducted only if no eavesdroppers exist in the secrecy guard zone around transmitters. The cooperative jamming based scheme utilizes non-transmitting nodes to generate artificial noise to suppress eavesdroppers in the same cell, such that transmissions can be conducted only if all eavesdroppers in the transmission range are suppressed. We then derive exact analytical expressions for the STC performance of the concerned network under both secure transmission schemes based on the analysis of two basic secure transmission probabilities. Finally, extensive simulation and numerical results are provided to corroborate our theoretical analysis and also to illustrate the STC performance of the concerned MANET.

 Conclusion

This paper studied the exact secrecy throughput capacity (STC) of a cell-partitioned MANET with the group-based scheduling scheme. We first proposed two secure transmission schemes based on the physical layer security technology, i.e., secrecy guard zone and cooperative jamming based schemes, respectively and then provided analytical expressions for the exact STC of the concerned MANET under both secure transmission schemes. Finally, we provide simulation and numerical results to illustrate the efficiency of our STC analysis as well the STC performance of the network. The results in this paper showed that the cooperative jamming based scheme outperforms the secrecy guard zone based scheme with respect to the STC performance when the secrecy guard zone is equivalent to the transmission range. The theoretical framework (exact capacity) in this paper is developed for the group-based scheduling schemes, so one possible future work is to study the STC under more flexible time sharing schemes. Since this paper considered a non-practical model, another interesting and also important research direction is to study the exact STC under some relatively practical network models. Also, performing experiments or simulations in real-world networks or on testbeds will be a possible research direction to obtain STC results of practical significance.