Outage behavior of selective relaying schemes

Woradit, Kampol; Quek, Tony Q. S.; Suwansantisuk, Watcharapan; Win, Moe Z.; Wuttisittikulkij, Lunchakorn; Wymeersch, Henk

doi:10.1109/twc.2009.080504

Cited by 85 publications

(53 citation statements)

References 15 publications

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“…Metode pemilihan relay dengan PRS dilakukan dengan cara mengestimasi kualitas kanal atau CSI [15], [17]. Berbeda halnya dengan RRS, proses estimasi dilakukan sebelum informasi dikirimkan, yaitu dengan cara mengirimkan bit training terlebih dahulu untuk mengetahui kualitas SNR antara sumber-relay-tujuan, yang menjadi dasar pemilihan relay terbaik.…”

Section: ) Proactive Relay Selection (Prs)unclassified

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Efisiensi Energi Sistem Komunikasi Kooperatif Multi-relay Quantize and Forward Berdasarkan Pemilihan Relay

Akhyar¹,

Nasaruddin²,

Muharar³

2017

Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI)

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Abstract-Currently, the increasing energy consumption is a global issue. Information technology and telecommunication industry is one of the areas with the largest energy consumption. The growth of mobile data users is an issue and the biggest challenge for the future. The cooperative wireless communication system has been the focus of research as one of the information delivery strategy with more efficient energy consumption. Energy efficiency in the cooperative wireless communication system can be improved by using a relay between base station and user device, where the distance between base station and user can be shortened, thus, the energy transmission can be minimized. Relay mechanism can be built by utilizing the protocol in the cooperative communication system, such as amplify and forward (AF), decode and forward (DF), and quantize and forward (QF). Relay-selection is an important issue in a cooperative wireless communication system that can reduce energy consumption at the system level. This study analyzes energy efficiency of multi-relay QF cooperative communication for line-of-sight (LOS) and non-line-of-sight (NLOS) environment based on relay selection strategies: reactive and proactive relay selection. A computer simulation is conducted based on a system model and mathematical analysis. Energy efficiency is calculated based on power consumption of signal transmission and observed in the distance between the source, relay, and destination. Simulation result shows that multi-relay QF networks with relay selection consume lower energy than without relay selection, hence, the energy usage in the relay selection networks is more efficient. Moreover, the strategy of proactive relay selection provides low energy consumption and high energy efficiency compared to the reactive relay selection strategy.Intisari-Saat ini, peningkatan konsumsi energi merupakan isu global. Industri teknologi informasi dan telekomunikasi merupakan salah satu bidang dengan konsumsi energi terbesar. Pertumbuhan pengguna data bergerak merupakan tantangan terbesar yang akan dihadapi pada masa mendatang. Sistem komunikasi kooperatif nirkabel telah menjadi fokus penelitian sebagai salah satu strategi pengiriman informasi dengan konsumsi energi yang lebih efisien. Efisiensi energi pada sistem komunikasi kooperatif nirkabel dapat ditingkatkan dengan menggunakan relay antara base station dengan perangkat pengguna, dengan jarak link dapat diperpendek, sehingga energi transmisi dapat diminimalkan. Mekanisme relay dilakukan dengan memanfaatkan protokol-protokol yang ada dalam sistem komunikasi kooperatif seperti amplify and forward (AF), decode and forward (DF), dan quantize and forward (QF). Pemilihan relay merupakan isu penting dalam sistem komunikasi kooperatif nirkabel yang dapat menurunkan tingkat konsumsi energi pada sistem. Oleh sebab itu, makalah ini menganalisis efisiensi energi sistem komunikasi kooperatif multi-relay QF untuk lingkungan line-of-sight (LOS) dan non-line-of-sight (NLOS) berdasarkan strategi pemilihan relay; reactive...

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Section: ) Proactive Relay Selection (Prs)unclassified

“…Bit training telah dijelaskan pada (6).  Relay kemudian meneruskan bit training yang telah dikuantisasikan ke tujuan dan dapat dijabarkan seperti pada (13) sampai (17).…”

Section: ) Proactive Relay Selection (Prs)unclassified

Efisiensi Energi Sistem Komunikasi Kooperatif Multi-relay Quantize and Forward Berdasarkan Pemilihan Relay

Akhyar¹,

Nasaruddin²,

Muharar³

2017

Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI)

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“…In the former scheme, the relay amplifies the received signal from the source and forwards it to the destination [17]. In the latter scheme, the relay first decodes the received signal and then re-encodes and forwards it to the destination [26,27].…”

Section: Introductionmentioning

confidence: 99%

Two-way relaying schemes in full duplex cellular system

Shi

Liu

et al. 2017

J Wireless Com Network

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Recently, full duplex (FD) has been attracting great attention, due to its capability to double the spectral efficiency. In this paper, we focus on a FD wireless communication network, in which a FD base station (BS) and a half duplex (HD) mobile station (MS) exchange their information via a HD relay station (RS) within two phases. An amplify-and-forward (AF) relaying scheme and a decode-and-forward (DF) relaying scheme are proposed for the two-way relay network. In the proposed DF relaying scheme, the RS chooses the best DF relaying mode according to channel state information (CSI) to achieve the maximum capacity. Specifically, the RS can decode and forward data streams from both the BS and MS, or only one of them, or none of them, and thus obtaining a selection diversity gain. In order to analyze the performance of the proposed schemes, achievable rate regions and sum-capacities of the proposed schemes are derived in closed form. Numerical and simulation results show that the proposed relaying schemes provide significant capacity gain.

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“…In the former scheme, a relay simply amplifies the received signal from the source and forwards it to the corresponding destination irrespective of source-to-relay (SR) link condition [4]. In the latter scheme, a relay first decodes the received signal and re-encodes it for forwarding regardless of the decoding result at the relay, namely, fixed DF relaying scheme [5] or determines whether to forward it or not depending on the channel condition of the SR link, namely, selective DF relaying scheme [6]. These two types of relaying schemes form the foundation of various sophisticated relaying schemes.…”

Section: Introductionmentioning

confidence: 99%

Availability of direct path in half‐duplex‐based cooperative relay networks

Lee

Kim

2015

J Wireless Com Network

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In this paper, we validate the availability of direct path in half-duplex-based cooperative relay networks from a practical point of view. Cooperative relaying is a low-complexity technique, which schedules orthogonal transmissions through the divided time slots. By doing so, transmission impairments due to multi-path fading and path loss are mitigated by obtaining a diversity gain. In conventional approaches, most researchers have focused on a role of relay and assumed that the received signal-to-noise ratio in source-to-destination link is doubled when source transmits the same signal twice during the two transmission phases. However, in practical wireless environments, a wireless channel is not static but varies with time. Thus, although the source retransmits the same signal during the second transmission phase instead of forwarding by a relay, the (time) diversity gain may be obtained. As a result, the performance of relaying-aided cooperative communication is not always better than that of the repeated transmission (RT), but the RT scheme may be a better option than a cooperative relaying scheme. To this end, we first show that the RT scheme is comparable to conventional cooperative relaying schemes. We then propose a selection decode-and-forward (DF) relaying scheme, which combines the DF relaying and RT schemes. The proposed selection DF relaying scheme has better outage performance than comparable relaying schemes in time-varying channels. Lastly, all the theoretical results are validated through numerical evaluations and Monte Carlo simulations.

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Outage behavior of selective relaying schemes

Cited by 85 publications

References 15 publications

Efisiensi Energi Sistem Komunikasi Kooperatif Multi-relay Quantize and Forward Berdasarkan Pemilihan Relay

Efisiensi Energi Sistem Komunikasi Kooperatif Multi-relay Quantize and Forward Berdasarkan Pemilihan Relay

Two-way relaying schemes in full duplex cellular system

Availability of direct path in half‐duplex‐based cooperative relay networks

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