MIMO Multiway Distributed Relay Channel With Full Data Exchange: An Achievable Rate Perspective

Yuan, Xiaojun; Zhang, Jianwen; Zhang, Ying Jun; Zhao, Xiang; Kuai, Xiaoyan

doi:10.1109/access.2018.2857214

Cited by 8 publications

(5 citation statements)

References 35 publications

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“…The coordinates of sources S 1 and S 2 are (−30, 0) and (30, 0), respectively. The relays are distributed in a unit circle with a centre (20,10). The total transmit power is assumed to be 30 dBm and the noise power is set to -40 dBm.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…Substituting Equations ( 19) and (20) into Equation ( 17), the secrecy rate maximization problem can be formulated as…”

Section: Joint Power Allocation and Time Switching Strategymentioning

confidence: 99%

“…Information transmission via the relay is the only option when the channel of the direct link is worse than that of the wiretap link. Unlike the above research findings based on single relay network transmission models, collaborative transmission based on multiple relays promises greater spatial grading gain [18–21]. A non‐orthogonal multiple access (NOMA) scheme with multiple relays, where the best relay to decode the desired data is selected [22], has better performance than the non‐cooperative NOMA scheme.…”

Section: Introductionmentioning

confidence: 99%

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Secrecy rate optimization for SWIPT in two‐way relay networks with multiple untrusted relays and channel estimation errors

et al. 2021

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The secrecy rate of two-way untrusted relay networks with imperfect channel state information based on SWIPT is investigated when multiple relays harvest energy from two sources. Despite assisting in information forwarding, the relays are considered untrusted in that they might attempt to eavesdrop on confidential information. To interfere with eavesdropping by untrusted relays, sources-based friendly cooperative jamming is introduced. A joint power allocation and time switching strategy has been studied to maximize the sum secrecy rate of the system under total block transmission duration and power constraints. The genetic algorithm (GA) is introduced to optimize the proposed joint power allocation and time switching (JPTs) scheme. In addition, two suboptimal schemes are proposed: the power allocation and time switching scheme for individual power constraints and the power allocation scheme for equal time allocation. Simulation results demonstrate that the proposed joint power allocation and time switching strategy performs better in contributing to the total secrecy rate of the system.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

“…Substituting Equations ( 19) and (20) into Equation ( 17), the secrecy rate maximization problem can be formulated as…”

Section: Joint Power Allocation and Time Switching Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Secrecy rate optimization for SWIPT in two‐way relay networks with multiple untrusted relays and channel estimation errors

et al. 2021

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“…The authors in [70] investigated the MIMO mRC with distributed relays under the full data exchange mode.…”

Section: A Capacity Analysismentioning

confidence: 99%

An Overview on Multiway Relay Communications: Fundamental Issues, Recent Advances, and New Challenges

Wang,

Yuan

2020

Preprint

Self Cite

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To address the coverage and capacity challenges in fifth-generation (5G) wireless networks, the relay technique has been considered as a promising solution and recently attracted great attentions from academia. The multiway relay channel (mRC), which serves as a fundamental building block of a relay network, defines the family of all possible information-flow patterns between a relay node and its neighboring nodes. Combined with several new techniques, such as physical-layer network coding (PLNC), signal and interference alignments, multi-input multi-output (MIMO), etc., the mRC exhibits superior capability to assist multiuser information exchange. In this article, we aim to provide a comprehensive overview on the state-of-the-art of the mRC from the perspectives of both information-theoretic and communication-theoretic studies. The key results are summarized and discussed to identify the current research progress of the mRC. Open problems and research challenges are also discussed to spur future research towards the mRC.Index Terms-Multiway relay channel (mRC), physical-layer network coding (PLNC), multi-output multi-input (MIMO), degrees of freedom (DoF), precoding, relay selection.

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“…On the other hand, users can also exchange public information with all other users. In other words, all users are broadcasting their information and receive information from all other users; thus, this type of exchange is also called group information exchange (see [37]) or full information exchange (see [38,39]).…”

Section: Introductionmentioning

confidence: 99%

General Secure Information Exchange Protocol for a Multiuser MIMO Relay Channel

Wang

2019

Entropy

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Secure information exchange occurs in many recently emerging cooperative-based networks, such as 5G networks (especially those with a Device to Device architecture), the Internet of Things, and vehicular ad hoc networks. However, the existing information exchange protocols only focus on either pairwise information exchange or group information exchange, and none of these protocols enable private and public information exchange to occur simultaneously. Thus, a general secure information exchange protocol for a multiuser channel is desirable. With this motivation, this paper investigates simultaneous private and public information exchange in a Multiple Inputs Multiple Outputs (MIMO) multiuser relay channel. In an aim to achieve this goal, signal alignment is chosen as the core technique. With the designed precoding matrix for each user, private information is aligned with its exchange partner, and public information forms a coding chain at the relay. With the aligned private signal and public coding chain, neither an untrusted relay nor external eavesdroppers can recover the original individual information. Performance analyses of the proposed protocol are conducted. First, we conduct transmission performance analyses from the perspective of time slot cost. Second, we conduct a security analysis for private information exchange and public information exchange. Third, we conduct secrecy sum-rate analysis for three attack scenarios: an untrusted relay attack only, an eavesdropper attack only, and both an untrusted relay and eavesdropper attack. The simulations are conducted to demonstrate that the proposed protocol can enable simultaneous private and public information exchange while resisting attacks by an undesired receiver, an untrusted relay, and external eavesdroppers.

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MIMO Multiway Distributed Relay Channel With Full Data Exchange: An Achievable Rate Perspective

Cited by 8 publications

References 35 publications

Secrecy rate optimization for SWIPT in two‐way relay networks with multiple untrusted relays and channel estimation errors

Secrecy rate optimization for SWIPT in two‐way relay networks with multiple untrusted relays and channel estimation errors

An Overview on Multiway Relay Communications: Fundamental Issues, Recent Advances, and New Challenges

General Secure Information Exchange Protocol for a Multiuser MIMO Relay Channel

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