Relay Selections for Cooperative Underlay CR Systems With Energy Harvesting

Ye, Jia; Liu, Zhedong; Zhao, Hui; Pan, Gaofeng; Ni, Qiang; Alouini, Mohamed‐Slim

doi:10.1109/tccn.2019.2908900

Cited by 29 publications

(13 citation statements)

References 27 publications

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“…The RnJ Scheme. To evaluate the efficacy of the jamming operation in our scheme, we compare it with the only relay selection scheme (e.g., [6,47]) which lets R j be idle in our scheme, namely, the RnJ scheme. The OP of the RnJ scheme is the same as that of ours (i.e., O RnJ = O RaJ ) but the IP of the former is different from that of the latter.…”

Section: Benchmark Schemes (Rnj and Nrnj)mentioning

confidence: 99%

Relay Selection‐and‐Jamming Scheme with Nonlinear Energy Harvesting

Pham-MinhTriet

Ho-Van

Nguyen

et al. 2021

Wireless Communications and Mobile Computing

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When direct source-destination communications are in outage, relay selection is a preferable solution to improve reliability for this communications. However, such a relay selection makes the eavesdropper better overhear source data through both source-relay and relay-destination communication hops, losing data security. To improve both reliability and security, this paper proposes a relay selection-and-jamming (RaJ) scheme to select one intermediate node as a conventional relay and another node as a jammer. To enhance energy efficiency, all intermediate nodes harvest radio frequency energy in source signals for their operations with nonlinear energy harvesting (NL-EH). The security and reliability of the RaJ scheme are assessed through suggested rigorous/asymptotic expressions and are significantly better than two benchmark schemes without neither jamming nor both relay selection and jamming. Additionally, they can be optimized with reasonable selection of specifications. Moreover, the NL property of the energy harvesters dramatically affects the reliability but negligibly degrades the security for the RaJ scheme. Furthermore, the linear EH (L-EH) is more reliable but less secure than the NL-EH.

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Section: Benchmark Schemes (Rnj and Nrnj)mentioning

confidence: 99%

Relay Selection‐and‐Jamming Scheme with Nonlinear Energy Harvesting

Pham-MinhTriet

Ho-Van

Nguyen

et al. 2021

Wireless Communications and Mobile Computing

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“…To achieve full cooperative diversity gains, relay selection techniques were suggested as an effective solution to overcome fading and system outage while sustaining spectral efficiency. Opportunistic relay selection (ORS) and partial relay selection (PRS) are the two most common relays among various relay selection schemes [ 11 , 24 , 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…The analytical expressions for the near and far user were derived over Nakagami-m channel. In [ 28 ] the outage performance of WPCCN system model has been investigated. A threshold for DF protocol is considered for and ORS and PRS schemes.…”

Section: Introductionmentioning

confidence: 99%

Optimal Relay Selection Scheme with Multiantenna Power Beacon for Wireless-Powered Cooperation Communication Networks

Messadi

Sali

Khodamoradi

et al. 2020

Sensors

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Unlike the fixed power grid cooperative networks, which are mainly based on the reception reliability parameter while choosing the best relay, the wireless-powered cooperative communication network (WPCCN) and in addition to the reception reliability the transmission requirement consideration is important for relay selection schemes. Hence, enabling efficient transmission techniques that address high attenuation of radio frequency (RF) signals according to the distance without increasing the total transmission power is an open issue worth studying. In this relation, a multiantennas power beacon (PB) that assists wireless-powered cooperative communication network (PB-WPCCN) is studied in this paper. The communication between source and destination is achieved with the aid of multiple relays, where both the source and the multiple relays need to harvest energy from the PB in the first place to enable their transmission functionalities. A novel relay selection scheme is proposed, named as two-round relay selection (2-RRS), where a group of relays that successfully decode the source information is selected in the first round selection. In the second round, the optimal relay is selected to forward the recorded information to the destination. The proposed 2-RRS scheme is compared with two existing relay selection schemes, i.e., partial relay selection (PRS) and opportunistic relay selection (ORS). The analytical closed-form expressions of outage probability and average system throughput are derived and validated by numerical simulation. The comparison results between different relay selection schemes show: (I) The superiority of the proposed 2-RRS scheme as it achieves around 17% better throughput compared to the conventional ORS scheme and 40% better than the PRS scheme, particularly when PB transmit power is 10 dB; (II) The proposed 2-RRS scheme guarantees the lowest outage probability, especially when the PB is equipped with multiantennas and performs beamforming technique; (III) The optimal localisation of the PB between the source and N relays depends on the adopted relay selection scheme; (IV) The exhaustive search of the maximum system throughput value shows that the proposed 2-RRS scheme required shorter energy harvesting time compared to other schemes. The increase in energy harvesting time and number of relays do not necessarily reflect positively on the system throughput performance; hence tradeoffs should be taken into consideration.

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“…In TS protocol, the transmission time is divided into two parts where the receiver nodes spend one to harvest energy from the source and the remaining for information transmission. In PS protocol on the other hand, the relay nodes used part of the receive power for EH and the other for information processing [12,13]. Combining energy harvesting with NOMA relaying systems to prolong the lifetime of energy-constrained wireless networks has recently received significant attention.…”

Section: Introductionmentioning

confidence: 99%

On the Outage Performance of Partial Relay Selection Aided Noma System With Energy Harvesting and Outdated Csi Over Non-Identical Channels

Owolawi¹,

Odeyemi²

2019

PIER C

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In this paper, the outage probability performance of energy harvesting based partial relay selection aided non-orthogonal multiple access (NOMA) system under outdated channel state information is studied. The source to relays link is assumed to follow Rayleigh fading distribution while the relay nodes to users are subjected to Nakagami-m distribution. The relay nodes employ an energy harvesting power splitting-based relaying protocol to transmit the source information to the users. At the destination, each user is equipped with multiple antennas, and maximum ratio combining is considered for signal reception. In order to evaluate the system performance, the outage probability closed-form expression for the concerned system is derived. The results demonstrate the significant impact of system and channel parameters on the system performance. In addition, the advantage of NOMA over the conventional orthogonal multiple access is also presented. Finally, the accuracy of the derived outage expression is validated through the Monte-Carlo simulation.

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Relay Selections for Cooperative Underlay CR Systems With Energy Harvesting

Cited by 29 publications

References 27 publications

Relay Selection‐and‐Jamming Scheme with Nonlinear Energy Harvesting

Relay Selection‐and‐Jamming Scheme with Nonlinear Energy Harvesting

Optimal Relay Selection Scheme with Multiantenna Power Beacon for Wireless-Powered Cooperation Communication Networks

On the Outage Performance of Partial Relay Selection Aided Noma System With Energy Harvesting and Outdated Csi Over Non-Identical Channels

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