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Journal of Computer and Communications

Secure Wireless Multicasting through Nakagami-m Fading Channels with Multi-Hop Relaying

Md Mizanur Rahman, Md. Zahurul I. Sarkar, Mohammad Mahmud Hasan

Published Jan 1, 2023• 1 citation
Publisher

Abstract

The additional diversity gain provided by the relays improves the secrecy capacity of communications system significantly. The multiple hops in the relaying system is an important technique to improve this diversity gain. The development of an analytical mathematical model of ensuring security in multicasting through fading channels incorporating this benefit of multi-hop relaying is still an open problem. Motivated by this issue, this paper considers a secure wireless multicasting scenario employing multi-hop relaying technique over frequency selective Nakagami-m fading channel and develops an analytical mathematical model to ensure the security against multiple eavesdroppers. This mathematical model has been developed based on the closed-form analytical expressions of the probability of non-zero secrecy multicast capacity (PNSMC) and the secure outage probability for multicasting (SOPM) to ensure the security in the presence of multiple eavesdroppers. Moreover, the effects of the fading parameter of multicast channel, the number of hops and eavesdropper are investigated. The results show that the security in multicasting through Nakagami-m fading channel with multi-hop relaying system is more sensitive to the number of hops and eavesdroppers. The fading of multicast channel helps to improve the secrecy multicast capacity and is not the enemy of security in multicasting.

DOI
10.4236/jcc.2023.115013

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The additional diversity gain provided by the relays improves the secrecy capacity of communications system significantly. The multiple hops in the relaying system is an important technique to improve this diversity gain. The development of an analytical mathematical model of ensuring security in multicasting through fading channels incorporating this benefit of multi-hop relaying is still an open problem. Motivated by this issue, this paper considers a secure wireless multicasting scenario employing multi-hop relaying technique over frequency selective Nakagami-m fading channel and develops an analytical mathematical model to ensure the security against multiple eavesdroppers. This mathematical model has been developed based on the closed-form analytical expressions of the probability of non-zero secrecy multicast capacity (PNSMC) and the secure outage probability for multicasting (SOPM) to ensure the security in the presence of multiple eavesdroppers. Moreover, the effects of the fading parameter of multicast channel, the number of hops and eavesdropper are investigated. The results show that the security in multicasting through Nakagami-m fading channel with multi-hop relaying system is more sensitive to the number of hops and eavesdroppers. The fading of multicast channel helps to improve the secrecy multicast capacity and is not the enemy of security in multicasting.
This Paper presents a comprehensive analysis of secrecy performance in a multicast wireless communication network operating over Nakagami- 0.5 fading channels. The Probability of non-zero secrecy multicast capacity (PNSMC) and the secure outage probability for multicasting (SOPM) are analytically developed under the influence of multiple relays, legitimate users, and eavesdroppers. To ensure enhanced secrecy reliability, an opportunistic relay selection approach is integrated with selection combining (SC) diversity at the destination. Verified the analytical results through extensive Monte Carlo simulations, exhibiting a strong correspondence with theoretical predictions. Numerical evaluations indicate that an increased number of relays and destination antennas notably strengthen secrecy performance, whereas stronger eavesdropper channels deteriorate it. In general, the framework presented provides useful design guidelines for cooperative secure multicast communication systems operating in severe fading environments.
The effects of scatterers, fluctuation parameter and propagation clusters significantly affect the performance of κ-μ shadowed fading channel. On the other hand, opportunistic relaying is an efficient technique to improve the performance of fading channels reducing the effects of aforementioned parameters. Motivated by these issues, in this paper, a secure wireless multicasting scenario through κ-μ shadowed fading channel is considered in the presence of multiple eavesdroppers with opportunistic relaying. The main purpose of this paper is to ensure the security level in wireless multicasting compensating the loss of security due to the effects of power ratio between dominant and scattered waves, fluctuation parameter, and the number of propagation clusters, multicast users and eavesdroppers, by opportunistic relaying technique. The closed-form analytical expressions are derived for the probability of non-zero secrecy multicast capacity (PNSMC) and the secure outage probability for multicasting (SOPM) to understand the insight of the effects of above parameters. The results show that the loss of security in multicasting through κ-μ shadowed fading channel can be significantly enhanced using opportunistic relaying technique by compensating the effects of scatterers, fluctuation parameter, and the number of propagation clusters, multicast users and eavesdroppers.
The effect of Selection Combining scheme is focusing on the enhancing security in multicasting over Nakagami 0.5 fading channel in the presence of multiple eavesdroppers. The study explores a scenario where a single-antenna transmitter communicates with multiple destinations and multiple eavesdroppers are trying to decode that confidential information. The closed-form analytical expressions are derived for the probability of non-zero secrecy multicast capacity and the secure outage probability for multicasting. These expressions shed light on the impact of key system parameters, such as the number of receivers, the number of eavesdroppers and the number of antennas at the receiver and eavesdropper. In order to enhance the communication security, the study employs linear diversity combining schemes such as Selection Combining, Maximal Ratio Combining and Equal Gain Combining diversity schemes. By leveraging these advanced techniques, the research contributes valuable insights to enhance the security of multicast communications systems employing the benefits of aforementioned diversity combining schemes with Nakagami 0.5 fading channel.
The performance of Rayleigh fading channels is substantially impacted by the impacts of relays, antennas, and the number of branches. Opportunistic relaying is a potent technique for enhancing the effects of the aforementioned factors while enhancing the performance of fading channels. Due to these issues, a secure wireless multicasting scenario using opportunistic relaying over Rayleigh fading channel in the presence of multiple wiretappers is taken into consideration in this study. So the investigation of a secure wireless multicasting scenario using opportunistic relaying over Rayleigh fading channel in the presence of multiple wiretappers is the focus of this paper. The primary goals of this study are to maximize security in wireless multicasting while minimizing security loss caused by the effects of relays, branches at destinations and wiretappers, as well as multicast users and wiretappers through opportunistic relaying. To comprehend the insight effects of prior parameters, the closed form analytical expressions are constructed for the probability of non-zero secrecy multicast capacity (PNSMC), ergodic secrecy multicast capacity (ESMC), and secure outage probability for multicasting (SOPM). The findings demonstrate that opportunistic relaying is a successful method for reducing the loss of security in multicasting.
A confidential multicasting scenario is considered through Nakagami-q fading channels in the presence of multiple eavesdroppers. We are interested to protect the confidential information so that no eavesdropper can decode any information from the multicast channels. A mathematical model is developed which consists of the closed-form analytical expressions for the ergodic secrecy multicast capacity and the secure outage probability for multicasting to ensure this security. Some numerical results are shown to justify the validity of the developed mathematical model. Moreover, the analytical expressions are verified via Monte-Carlo simulation.
This paper focuses on a secure wireless multi-casting under the employment of generalized receiver along with maximal ratio combining (MRC) diversity technique using opportunistic relaying technique. MRC diversity technique and opportunistic relaying technique mitigate the fading effect significantly and the generalized receiver is flexible to adaptive signal processing. The authors want to protect the transmitted signal from eavesdropping considering the effect of number of relays, receive side antenna number, eavesdropper side antenna number, multicast user number and eavesdropper number. In this issue the authors derived the closed form analytical expression for probability of non-zero secrecy multicast capacity (PNSMC) and secure outage probability for multicasting (SOPM) to ensure the secrecy in the presence of multiple eavesdroppers. These mathematical models are helpful to to realize the insight of the effects of aforementioned parameters. The numerical results show that, security in multicast network employing generalized receiver with MRC diversity technique is significantly affected by the number of relay, receive antenna, eavesdropper antenna, multicast user and eavesdropper, specially at low noise power region of eavesdropper.