Adaptive optimal relay selection in cooperative vehicular communications under security constraints
| Autor: | Sajad Poursajadi, Mohammad Hossein Madani |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Asymptotic analysis
business.industry Computer science Node (networking) Transmitter Physical layer 020206 networking & telecommunications Data_CODINGANDINFORMATIONTHEORY 02 engineering and technology Spectral efficiency 010501 environmental sciences 01 natural sciences law.invention Relay law Channel state information Automotive Engineering Secrecy 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering business Computer Science::Cryptography and Security Computer Science::Information Theory 0105 earth and related environmental sciences Computer network |
| Zdroj: | Vehicular Communications. 31:100360 |
| ISSN: | 2214-2096 |
| Popis: | In this paper, we study the physical layer security of multiple decode-and-forward cooperative vehicular to vehicular communications in which a known eavesdropper can receive the signals from source and relay nodes in the broadcast and cooperative phases, respectively. At first, we present a generalized optimal relay selection (GORS) in order to select the best relay considering the security of both broadcast and cooperative phases. Then, we apply an incremental mechanism to this generalized version, and propose an adaptive optimal relay selection (AORS) scheme which adaptively provides and preserves the security. Two scenarios are considered in the network based on availability of channel state information (CSI) of the main and wiretap links. For the first scenario where CSI is available at the receiver nodes, we analyze the secrecy outage probability and average spectral efficiency. Whereas, for the second scenario where CSI can be available at the transmitter node of each phase, the average secrecy capacity is analyzed. The results show that the AORS scheme can improve the secrecy performance compared to the GORS and Direct schemes. Moreover, the asymptotic analysis is provided which shows that the proposed scheme provides full secrecy diversity order. Finally, results of Monte Carlo simulations are presented that denote validity of the analysis and evaluate the system performance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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