Achievable rate regions of multi‐way relay channel with direct links

Su, Yuping; Liu, Ying; Song, Guanghui; Liu, Lei

doi:10.1049/iet-com.2014.0622

Cited by 5 publications

(13 citation statements)

References 26 publications

(36 reference statements)

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“…In particular, we prove that the proposed schemes can achieve a finite gap that is independent of the transmit powers and number of clusters of the system. Thanks to the upper bound on the cut-set bound, the results in this section are more general than those by Su et al [19], which are restricted to certain relay power regimes. We also prove that the AF protocol achieves a finite gap to the CF protocol.…”

Section: Comparison Between Cut-set and Proposed Schemesmentioning

confidence: 81%

“…First results based on random coding arguments have been recently proposed for the asymmetric (in terms of link gains and powers) multiway relay channel with one cluster in [19]. The study of practical coding schemes for asymmetric networks (in terms of link gains, powers, and number of users per cluster) remains an open problem, as does the characterization of the entire achievable rate region for the multiway relay channel with L clusters.…”

Section: Discussionmentioning

confidence: 99%

“…The multiway relay channel with direct links and one cluster has recently been studied by Su et al in [19]. The authors characterized the cut-set bound and the rate region using DF and CF based on random coding arguments.…”

Section: Introductionmentioning

confidence: 99%

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On the Gaussian multiway relay channel with intra-cluster links

Savard¹,

Weidmann

2016

J Wireless Com Network

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This paper studies the extension of the multiway relay channel (introduced by Gündüz et al.) by adding intra-cluster links. In this model, multiple clusters of users communicate with the help of one relay and the users within a cluster wish to exchange messages among themselves. Restricted encoders are considered; thus, the encoded messages of each user depend only on its own message, not on previously decoded ones. Cut-set bounds and achievable rates are given for the Gaussian case with and without time-sharing between clusters. Depending on the protocol considered, schemes based on random coding or nested lattice coding are proposed. The schemes are compared in terms of exchange capacity, that is the equal rate point in the capacity region of a symmetric multiway relay channel. It is shown that the gap between the cut-set bound and Compress-and-Forward, as well as Amplify-and-Forward, is independent of the transmit power constraints when time-sharing is used.

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Section: Comparison Between Cut-set and Proposed Schemesmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

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On the Gaussian multiway relay channel with intra-cluster links

Savard¹,

Weidmann

2016

J Wireless Com Network

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“…Similar system models were subsequently considered in [3]- [6], [8]- [12], where different strategies for exchanging information among users were proposed and analyzed. They all consist of two phases: one in which users transmit, called multiple access phase (MAC), and the other where the relay broadcasts signals to all users, called the broadcast phase (BC).…”

Section: A Prior Related Researchmentioning

confidence: 99%

“…The transmission strategies proposed in [5], [8] and [9] consider that all users transmit simultaneously during the first TS. In [8] and [9], users can communicate not only with the relay but also with one another.…”

Section: A Prior Related Researchmentioning

confidence: 99%

Generalized Multiway Relay Network: Proposition and Effective Rate Analysis

Doniak

Souza

Filho

2018

JCIS

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Abstract-A multiway relay network (mRN), which is widely employed in the literature, is extended to represent a larger number of practical scenarios, such as a vehicular ad hoc network (VANET). For the proposed system, generalized multiway relay network (g-mRN), three transmission strategies are presented and analyzed in terms of effective rate, for different numbers of users. Assuming that the average signal-to-noise ratio (SNR) is known to the transmitters, the maximum effective rate is obtained through the optimal choice of the message rates. We also derive the effective rate for fixed message rates. Numerical results show that the best strategy under the optimal message rates is the one in which all users transmit simultaneously in the multiple access phase. But when considering fixed message rates, the best transmission strategy depends upon the SNR. These results are important in that they can be used as guidelines for selecting the right strategy and message rates depending on the situation.Index Terms-Multiway relay network, Effective rate, Message rate, VANET.

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