Performance Evaluation of Relay Selection Schemes in Beacon-Assisted Dual-hop Cognitive Radio Wireless Sensor Networks under Impact of Hardware Noises

Tran, Dinh-Hieu; Duy, Tran Trung; Choi, Seong Gon

doi:10.20944/preprints201805.0233.v1

Cited by 16 publications

(24 citation statements)

References 43 publications

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“…Furthermore, in order to compare the performance of different energy cooperation schemes, we simulated hybrid par- tial relay selection (H-PRS), best opportunistic relay selection (B-ORS) in [31], where the relays employ power splitting to harvest energy from radio frequency signal of the sources and then to forward data to the destination, and energy harvesting or information decoding (EH/ID) in [34], in which the relay transfers a portion of its energy to the source as an energy provider or cooperates with the source to transmit data to the destination as a relay. Like [31], in the H-PSR and H-OSR simulation, the fraction of the total energy used for EH is set to 0.2 (α = 0.2). The results are shown in Fig.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Literature [30] developed a partial relay selection protocol (PRS) based on partial channel state information and an opportunistic relay selection (ORS) method by taking the harvested energy into account to enhance system performance in terms of outage probability and diversity gain. On this basis, considering the impact of hardware noises, hybrid partial relay selection (H-PRS) and best opportunistic relay selection (B-ORS) protocols were proposed to improve transmission reliability and throughput in [31], where instantaneous signal to noise ratio (SNR) replaced channel gain to select the best relay.…”

Section: Introductionmentioning

confidence: 99%

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Energy Collaboration for Non-Homogeneous Energy Harvesting in Cooperative Wireless Sensor Networks

Liu

2020

IEEE Access

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In wireless sensor networks, energy harvesting is developed as an effective way to solve energy drain problem of nodes which powered by battery, just like that cooperative communication is used to improve transmission reliability. In some energy harvesting networks, the nodes' energy harvested from ambient environment is disequilibrium. For example, nodes exposed to sunlight collect more solar energy than those shaded. Impoverished energy will reduce transmission reliability because some nodes have not enough energy to send data or are forced to decrease transmission power to save energy. In this paper, energy collaboration is taken into consideration for non-homogeneous energy harvesting in cooperative wireless sensor networks, where all sensor nodes harvest solar energy and then store it in rechargeable battery. And an energy cooperative protocol is proposed for energy inhomogeneity to enhance transmission reliability among relay nodes through radio frequency, where the nodes with abundant energy share excess power to other nodes which undertake the forwarding task but store insufficient energy. By exploiting ACK/NACK frame fed back from the destination node and No Enough Energy (NEE) frame advertised by the forwarding relays in the active set, each candidate node forms its energy supply set when all of them are lack of energy for transmitting. For the relay selection, three strategies are presented for choosing the pair of the best forwarding relay and the optimal energy supply relay, which are respectively named Best Channel Strategy, Nearest Distance Strategy and Minimum Energy Sharing Strategy. Furthermore, the outage probability of cooperative transmission under energy collaboration is derived. Simulation results show that energy collaboration for cooperative wireless sensor networks can significantly reduce the outage probability of the system and improve transmission reliability of the network.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy Collaboration for Non-Homogeneous Energy Harvesting in Cooperative Wireless Sensor Networks

Liu

2020

IEEE Access

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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%

“…ORS and PRS schemes’ mean difference is that the channel state information (CSI) of the two hops (S-R link and R-D link) is considered to select the best cooperative relay in the ORS scheme. However, in PRS, it is assumed that only the CSI of one hop is available during selection [ 26 ]. In [ 24 ] the PRS scheme was used to select a single relay based on CSI of the S-R Link only.…”

Section: Introductionmentioning

confidence: 99%

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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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Joint impacts of hardware impairments, imperfect CSIs, and interference constraints on underlay cooperative cognitive networks with reactive relay selection

Son

2018

Telecommun Syst

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In this paper, we investigate joint impacts of hardware impairments, imperfect channel state information (CSI) and interference constraints at secondary users in an underlay decode-and-forward cognitive network with multiple primary receivers, called as JIC protocol. A best secondary relay is derived from the reactive relay selection which maximizes signal-to-interferenceand-distortion-and-noise ratios from a candidates relay set to a secondary destination over Rayleigh fading channels. The exact and asymptotic closed-form outage probability expressions are obtained to evaluate the system performance of the JIC protocol, and then are verified by the Monte Carlo simulations. Contributions show performance degradation of the JIC protocol due to the hardware impairments, the imperfect CSIs, and the interference constraints, and the significant performance improvement with respect to optimal impairment levels and optimal relay locations as well as the increase in the number of the secondary relays. In addition, insightful discussions with the conventional direct transmission are provided. Finally, the exact and asymptotic closed-form expressions are valid to the simulation results.

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Performance Evaluation of Relay Selection Schemes in Beacon-Assisted Dual-hop Cognitive Radio Wireless Sensor Networks under Impact of Hardware Noises

Cited by 16 publications

References 43 publications

Energy Collaboration for Non-Homogeneous Energy Harvesting in Cooperative Wireless Sensor Networks

Energy Collaboration for Non-Homogeneous Energy Harvesting in Cooperative Wireless Sensor Networks

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

Joint impacts of hardware impairments, imperfect CSIs, and interference constraints on underlay cooperative cognitive networks with reactive relay selection

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