Weighted Sum-Rate Maximization for Rate-Splitting Multiple Access Based Secure Communication

Xia, Huiyun; Mao, Yijie; Clerckx, Bruno; Zhou, Xiaokang; Han, Shuai; Li, Cheng

doi:10.1109/wcnc51071.2022.9771854

Cited by 20 publications

(7 citation statements)

References 18 publications

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“…Since both two schemes can only suit for extremely weak or strong interference levels, and are sensitive to the inaccuracy of channel state information at the transmitter (CSIT), RSMA is proposed to overcome these drawback, whose excellent performance is demonstrated by the adaptive interference management strategy and the robustness under inaccurate CSIT [2]. Specifically, RSMA enables each user's message is split into common message and private message at the transmitter side and recovered at the user side by successive interference cancellation (SIC) [3]. Such scheme achieves a more flexible and effective interference management by partially decoding the interference and partially treating the remaining interference as noise.…”

Section: Introductionmentioning

confidence: 99%

Robust Sum-Rate Maximization in Transmissive RMS Transceiver-Enabled SWIPT Networks

Zhang

et al. 2023

IEEE Internet Things J.

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Due to the low power consumption and low cost nature of transmissive reconfigurable intelligent surface (RIS), in this paper, we propose a downlink multi-user rate-splitting multiple access (RSMA) architecture based on the transmissive RIS transmitter, where the channel state information (CSI) is only accquired partially. We investigate the weighted sum-rate maximization problem by jointly optimizing the power, RIS transmissive coefficients and common rate allocated to each user. Due to the coupling of optimization variables, the problem is nonconvex, and it is difficult to directly obtain the optimal solution. Hence, a block coordinate descent (BCD) algorithm based on sample average approximation (SAA) and weighted minimum mean square error (WMMSE) is proposed to tackle it. Numerical results illustrate that the transmissive RIS transmitter with ratesplitting architecture has advantages over conventional space division multiple access (SDMA) and non-orthgonal multiple access (NOMA).

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Section: Introductionmentioning

confidence: 99%

Robust Sum-Rate Maximization in Transmissive RMS Transceiver-Enabled SWIPT Networks

Zhang

et al. 2023

IEEE Internet Things J.

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“…Actually, there are a few works that take the privacy of RSMA nodes or the security of RSMA communication into account, in order to maximize secrecy sum rate [33], weighted sum rate [34], minimum secrecy rate [35]- [37], or secrecy energy efficiency [38]. Specifically, by letting the legal node to send the decoded information to another node, cooperative rate-splitting was implemented and the secure sum rate was maximized [33].…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, by letting the legal node to send the decoded information to another node, cooperative rate-splitting was implemented and the secure sum rate was maximized [33]. While constraining the security rate of all users, Xia et al found that RSMA's weighted sum rate can be superior to that of general multi-user linear precoding [34]. A RSMA-aided cognitive satellite terrestrial network was considered by Lin et al in [38], and the proposed design can also obtain acceptable performance of cellular users.…”

Section: Introductionmentioning

confidence: 99%

A Unified Rate-Splitting Framework for Secure Spectrum Sharing via Joint Precoding Optimization

Yang

Zhao

et al. 2023

IEEE Systems Journal

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To handle the security problem of cognitive radio (CR) systems, secondary users (SUs) are able to be designed to assist the primary user (PU) in secure transmission. To realize the spectrum sharing among CR users, we adopt the rate-splitting multiple access (RSMA) properly, with non-orthogonal multiple access (NOMA) and space division multiple access (SDMA) as its special cases. In this paper, we set up a unified ratesplitting framework to guarantee the safe spectrum sharing through multiple multi-access strategies, without the knowledge of wiretap channels. The precoding vectors at the transmitter are conjointly designed to boost the transmission of common stream, which is from both PU and SU. Besides, the private stream of the downlink CR system can be well secreted in the high-power common signal. As for NOMA and SDMA, when the message of SU is regarded as the friendly jamming signal, the security transmission requirement of PU can be similarly guaranteed via precoding design. Simulations validate that the rate-splitting framework we established can be effective in ensuring the spectrum sharing security for the secure users through RSMA, and the security for NOMA and SDMA is also able to be promoted through adjusting our designed framework.

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“…Assuming the worst-case uncertainty channel model, the authors of [9] jointly designed the IUI mitigation and secrecy sum-rate maximization for the RSMA system, which significantly enhanced the secrecy rate performance compared to that of NOMA. In the presence of an internal eavesdropper, a secure beamforming design was proposed that takes into account all users' secrecy rate constraints, which resulted in RSMA outperforming the benchmark schemes in terms of weighted sum rate [10]. To prevent untrusted relays from eavesdropping on private messages owned by other users, a two-slot cooperative rate-splitting scheme was proposed in which the precoding, slot allocation, and rate allocation were jointly optimized to effectively guarantee users are safe from eavesdropping [11].…”

Section: Introductionmentioning

confidence: 99%

Joint Hovering Height, Power, and Rate Optimization for Air-to-Ground UAV-RSMA Covert Communications

Chang

Chen

et al. 2023

Drones

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In this paper, we investigate covert communications for an unmanned aerial vehicle (UAV)-aided rate-splitting multiple access (RSMA) system in which the UAV transmits to the covert and public users separately while shielding covert transmissions from a warden. Under the RSMA principles, the messages of the covert and public users are converted to common and private streams for air-to-ground transmissions. Subject to the quality of service (QoS) requirements of the public user and covertness constraint of the UAV-aid RSMA (UAV-RSMA) system, the aim of covert communication design is to maximize the covert rate by jointly optimizing the transmit power allocation, common rate allocation, and UAV hovering height, which each contribute to the uncertainty of the warden’s binary decision and attempts to enhance communication performance. To address the non-convex covert rate maximization problem in addition to the highly coupled system parameters, we decouple the original problem into three subproblems of transmit power allocation, common rate allocation, and UAV hovering height. We derive the optimal solutions for each of the subproblems of the transmit power and rate allocations and formulate a signomial programming problem to tackle UAV hovering height optimization. The simulation results indicate the superior covert rate performance achieved by the proposed AO algorithm and demonstrate that the proposed UAV-RSMA scheme achieves a higher covert rate than the benchmark schemes.

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Weighted Sum-Rate Maximization for Rate-Splitting Multiple Access Based Secure Communication

Cited by 20 publications

References 18 publications

Robust Sum-Rate Maximization in Transmissive RMS Transceiver-Enabled SWIPT Networks

Robust Sum-Rate Maximization in Transmissive RMS Transceiver-Enabled SWIPT Networks

A Unified Rate-Splitting Framework for Secure Spectrum Sharing via Joint Precoding Optimization

Joint Hovering Height, Power, and Rate Optimization for Air-to-Ground UAV-RSMA Covert Communications

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