Decode and Forward Relay-Assisted Power-Line Communication

Khyari, Nouha; Khalfallah, Sofiane; Barouni, Yosra; Slama, Jaleleddine Ben Hadj

doi:10.1016/j.procs.2015.12.014

Cited by 3 publications

(4 citation statements)

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“…There are two types of trusted relays. The first is akin to decode-and-forward in conventional wireless networks [22], in that their main function is to receive photons carrying data qubits via optical-to-electronic or O/E conversions, and then to regenerate photons (after E/O conversions) carrying the same data qubits for retransmission to the next relay until the photons reach Bob. While this type of relays may be suitable when Alice sends a given bit sequence of 0's and 1's as in the case of QKD, and hence each relay can measure them and thus regenerate them, these relays are not suitable in QDNs where Alice sends photons, each carrying superposed quantum state information that cannot be measured by a relay.…”

Section: Background and Assumptionsmentioning

confidence: 99%

Quantum Transport Protocols for Distributed Quantum Computing

Zhao,

Qiao

2021

Preprint

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Quantum computing holds a great promise and this work proposes to use new quantum data networks (QDNs) to connect multiple small quantum computers to form a cluster. Such a QDN differs from existing quantum key distribution (QKD) networks in that the former must deliver data qubits reliably within itself. Two types of QDNs are studied, one using teleportation (Tele-QDN) and the other using tell-and-go (TAG) (TAG-QDN) to exchange quantum data. Two corresponding quantum transport protocols (QTPs), named Tele-QTP and TAG-QTP, are proposed to address many unique design challenges involved in reliable delivery of data qubits, and constraints imposed by quantum physics laws such as the nocloning theorem, and limited availability of quantum memory, a precious resource in QDNs.The proposed Tele-QTP and TAG-QTP are the first transport layer protocols for QDNs, complementing other works on the network protocol stack. Tele-QTP and TAG-QTP have novel mechanisms to support congestion-free and reliable delivery of streams of data qubits by managing the limited quantum memory at end hosts as well as intermediate nodes, under distributed control. Both analysis and extensive simulations show that the proposed QTPs can achieve a high throughput and fairness. This study also offers new insights into potential tradeoffs involved in using two different types of QDNs.

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Section: Background and Assumptionsmentioning

confidence: 99%

Quantum Transport Protocols for Distributed Quantum Computing

Zhao,

Qiao

2021

Preprint

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“…Compared to a one-way relay (OWR), a twoway relay (TWR) has the potential to increase the spectrum efficiency (SE) as duplex communication can be achieved in two time slots by employing physical-layer network coding (PNC) or analog network coding (ANC) at the relay [16]- [22]. Considering the data exchange in the SG, next-generation electric power grids with two-way communications are expected to increase the data rate, system reliability, and security [23]. The two common relaying protocols are the amplify-and-forward (AF) and the decode-andforward (DF) protocols.…”

Section: Depending On the Operating Frequency Plc Technology Canmentioning

confidence: 99%

“…, and E[C B ] are approximated in (23), (24), and (25), as shown at the bottom of this page, respectively. The RVs γ AR j and γ BR j are respectively distributed as…”

Section: A Average Sum Capacitymentioning

confidence: 99%

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Performance Analysis of Two-Way Relaying in Cooperative Power Line Communications

Ahiadormey

Anokye

et al. 2019

IEEE Access

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This paper studies the performance of a half-duplex (HD) two-way relay (TWR) in power line communication (PLC) over a log-normal fading channel with impulsive noise. We consider the two common relaying protocols: amplify-and-forward (AF) and decode-and-forward (DF). For the DF relaying, we apply physical-layer network coding (PNC) and analog-network coding (ANC) to the PLC TWR. We derive analytic expressions for the average sum capacity and the outage probability of the system. The Monte Carlo simulations are provided throughout to validate our analysis. The analytical results show a tight approximation to the simulation results. We compare the one-way relay (OWR) to the TWR and show that the HD spectral efficiency loss incurred by the OWR can be sufficiently mitigated in PLC. However, the outage probability of the TWR is inferior to that of the OWR. To enhance the outage performance of the PLC TWR, we implement a hybrid PLC/wireless (HPW) system, where all nodes are equipped with the PLC and wireless capabilities. Data transmission occurs over the two parallel links. The diversity in the transmission allows the TWR to improve its outage performance in the AF and DF protocols. The impact of the impulsive noise, inherent to the PLC channels, is also highlighted in the simulation results. It is shown that the impulsive noise severely impairs system performance. INDEX TERMS Two-way relaying, average capacity, outage probability, power line communication (PLC), PLC/wireless diversity.

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