期刊
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
卷 21, 期 11, 页码 9818-9833出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TWC.2022.3179706
关键词
Vehicle-to-everything; Security; Roads; Uplink; Probability; Wireless communication; Stochastic processes; Cellular vehicle-to-everything; physical-layer security; millimeter wave; stochastic geometry; Poisson line process; Poisson point process
资金
- National Natural Science Foundation of China [61941105, 62171364, 61701390, 62102301]
- Open Research Fund of National Mobile Communications Research Laboratory, Southeast University [2021D07]
- China Postdoctoral Science Foundation [2021M702631]
- Natural Science Basic Research Plan of Shaanxi Province [2022JM-320]
- Fundamental Research Funds for the Central Universities [xzy012021033]
- Guangdong Basic and Applied Basic Research Foundation [2020A1515110772]
- Engineering and Physical Sciences Research Council [EP/T015985/1]
- Australia Research Council [DP220103596, LP200301482]
- Australian Research Council [LP200301482] Funding Source: Australian Research Council
This paper investigates the physical-layer security of uplink millimeter wave communications in a C-V2X network, proposing two uplink association schemes and establishing an analytical framework to evaluate security performance. Numerical results validate theoretical analysis and show that the LPA scheme outperforms the SDA scheme in terms of secrecy throughput.
In this paper, we investigate physical-layer security of the uplink millimeter wave communications for a cellular vehicle-to-everything (C-V2X) network comprised of a large number of base stations (BSs) and different categories of V2X nodes, including vehicles, pedestrians, and road side units. Considering the dynamic change and randomness of the topology of the C-V2X network, we model the roadways, the V2X nodes on each roadway, and the BSs by a Poisson line process, a 1D Poisson point process (PPP), and a 2D PPP, respectively. We propose two uplink association schemes for a typical vehicle, namely, the smallest-distance association (SDA) scheme and the largest-power association (LPA) scheme, and we establish a tractable analytical framework to comprehensively assess the security performance of the uplink transmission, by leveraging the stochastic geometry theory. Specifically, for each association scheme, we first obtain new expressions for the association probability of the typical vehicle, and then derive the overall connection outage probability and secrecy outage probability by calculating the Laplace transform of the aggregate interference power. Numerical results are presented to validate our theoretical analysis, and we also provide interesting insights into how the security performance is influenced by various system parameters, including the densities of V2X nodes and BSs. Moreover, we show that the LPA scheme outperforms the SDA scheme in terms of secrecy throughput.
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