Security-Reliability Trade-Off Analysis for Rateless Codes-Based Relaying Protocols Using NOMA, Cooperative Jamming and Partial Relay Selection

Duy-Hung Ha,Pham Ngoc Son,Miroslav Voznak,Thuong Le-Tien,Tran Trung Duy

doi:10.1109/access.2021.3114343

Abstract

In this paper, we propose secure relaying transmission protocols using rateless codes, where a source sends encoded packets to two intended destinations via help of intermediate relays. Employing non-orthogonal multiple access, two encoded packets can be sent to the destinations at the same time. In addition, two partial relay selection methods are studied to enhance reliability of the data transmission at the first and second hops. For protecting the source-relay and relay-destination transmission against an eavesdropper, cooperative jamming technique is employed. Particularly, in the first phase of each data transmission cycle, the remaining relays (except the selected relay) are used to transmit artificial noise on the eavesdropper, and cooperate with the selected relay to cancel interference components. In the second phase, trusted nodes that are near the destinations are employed to play a role as the cooperative jammers. For a fair performance comparison, we design a simple transmit power allocation for the transmitter and jammer nodes at the first and second phases. We also propose an adaptive power allocation method, where fractions of the transmit power are appropriately allocated to the signals, relying on instantaneous channel gains between the selected relay and the destinations. This paper also derives exact closed-form formulas of outage probability and intercept probability over Rayleigh fading channel. All the performance analysis is then validated by Monte-Carlo simulations. The obtained results clearly show a trade-off between security and reliability that can be enhanced by optimally designing the system parameters.

Highlights

The network security is an important topic object of different studies by scientific community as shown in many papers existing in literature [1]–[3]
106-107 trials are generated in each simulation so that the simulation results nicely converge to the theoretical ones which are presented by the derived expressions of outage probability (OP) and intercept probability (IP)
In this paper, we proposed the RCs-based secure transmission protocol using Non-orthogonal multiple access (NOMA), cooperative jamming (CJ) and partial relay selection (PRS) to enhance the performance for dual-hop DF relaying networks, in terms of low complexity and latency, high reliability, throughput and security

Summary

Introduction

The network security is an important topic object of different studies by scientific community as shown in many papers existing in literature [1]–[3]. Complex data encryption methods at the upper layers are used to obtain the secure communication. Researchers have proposed a new secure communication approach for wireless communications networks (WCNs), named physical-layer. In PLS, physical channel parameters, such as link distances, channel state information (CSI) of data and/or eavesdropping channels, artificial noises (ANs), can be exploited to obtain security. Reference [8] evaluates probability of positive secrecy capacity (PSC) for a dual-hop decode-and-forward (DF) relaying protocol, where secrecy capacity is difference between instantaneous channel capacity of the data and eavesdropping links. The transmitters in [8] including source and relay generate different code-books so that an eavesdropper cannot apply maximal ratio combining (MRC) as decoding the received

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Results

Conclusion