# Opportunistic Network Decoupling with Virtual Full-Duplex Operation in Multi-Source Interfering Relay Networks

Won-Yong Shin, Vien V. Mai, Bang Chul Jung, Hyun Jong Yang

Research output: Contribution to journalArticle

1 Citation (Scopus)

### Abstract

We introduce a new achievability scheme, termed opportunistic network decoupling (OND), operating in virtual full-duplex mode. In the scheme, a novel relay scheduling strategy is utilized in the $K\times N\times K$ channel with interfering relays , consisting of $K$ source-destination pairs and $N$ half-duplex relays in-between them. A subset of relays using alternate relaying is opportunistically selected in terms of producing the minimum total interference level, thereby resulting in network decoupling. As our main result, it is shown that under a certain relay scaling condition, the OND protocol achieves $K$ degrees of freedom even in the presence of interfering links among relays. Numerical evaluation is also shown to validate the performance of the proposed OND. Our protocol basically operates in a fully distributed fashion along with local channel state information, thereby resulting in relatively easy implementation.

Original language English 7582492 2321-2333 13 IEEE Transactions on Mobile Computing 16 8 https://doi.org/10.1109/TMC.2016.2614979 Published - 2017 Aug 1

### Fingerprint

Network protocols
Channel state information
Scheduling

### All Science Journal Classification (ASJC) codes

• Software
• Computer Networks and Communications
• Electrical and Electronic Engineering

### Cite this

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title = "Opportunistic Network Decoupling with Virtual Full-Duplex Operation in Multi-Source Interfering Relay Networks",
abstract = "We introduce a new achievability scheme, termed opportunistic network decoupling (OND), operating in virtual full-duplex mode. In the scheme, a novel relay scheduling strategy is utilized in the $K\times N\times K$ channel with interfering relays , consisting of $K$ source-destination pairs and $N$ half-duplex relays in-between them. A subset of relays using alternate relaying is opportunistically selected in terms of producing the minimum total interference level, thereby resulting in network decoupling. As our main result, it is shown that under a certain relay scaling condition, the OND protocol achieves $K$ degrees of freedom even in the presence of interfering links among relays. Numerical evaluation is also shown to validate the performance of the proposed OND. Our protocol basically operates in a fully distributed fashion along with local channel state information, thereby resulting in relatively easy implementation.",
author = "Won-Yong Shin and Mai, {Vien V.} and Jung, {Bang Chul} and Yang, {Hyun Jong}",
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Opportunistic Network Decoupling with Virtual Full-Duplex Operation in Multi-Source Interfering Relay Networks. / Shin, Won-Yong; Mai, Vien V.; Jung, Bang Chul; Yang, Hyun Jong.

In: IEEE Transactions on Mobile Computing, Vol. 16, No. 8, 7582492, 01.08.2017, p. 2321-2333.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Opportunistic Network Decoupling with Virtual Full-Duplex Operation in Multi-Source Interfering Relay Networks

AU - Shin, Won-Yong

AU - Mai, Vien V.

AU - Jung, Bang Chul

AU - Yang, Hyun Jong

PY - 2017/8/1

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AB - We introduce a new achievability scheme, termed opportunistic network decoupling (OND), operating in virtual full-duplex mode. In the scheme, a novel relay scheduling strategy is utilized in the $K\times N\times K$ channel with interfering relays , consisting of $K$ source-destination pairs and $N$ half-duplex relays in-between them. A subset of relays using alternate relaying is opportunistically selected in terms of producing the minimum total interference level, thereby resulting in network decoupling. As our main result, it is shown that under a certain relay scaling condition, the OND protocol achieves $K$ degrees of freedom even in the presence of interfering links among relays. Numerical evaluation is also shown to validate the performance of the proposed OND. Our protocol basically operates in a fully distributed fashion along with local channel state information, thereby resulting in relatively easy implementation.

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