Hybrid Time-Power Switching Protocol of Energy Harvesting Bidirectional Relaying Network: Throughput and Ergodic Capacity Analysis

Non-orthogonal multiple access (NOMA) and energy harvesting (EH) are combined to introduce a dual-hop wireless sensor system. In particular, this paper considers a novel EH protocol based on time power switching-based relaying (TPSR) architecture for amplify-and-forward (AF) mode. We introduce a novel system model presenting wireless network with impacts of energy harvesting fractions and derive analytical expressions for outage probability and ergodic rate for the information transmission link. It confirmed that the right selection of power allocation for NOMA users can be performed to obtain optimal outage and ergodic capacity performance. Theoretical results show that, in comparison with the conventional solutions, the proposed model can achieve acceptable outage performance for sufficiently small threshold signal to noise ratio (SNR) with condition of controlling time switching fractions and power splitting fractions appropriately in considered TPSR protocol. We also examine the impacts of transmitting power at source, transmission rate, the other key parameters of TPSR to outage, and ergodic performance. Simulation results are presented to corroborate the proposed system.

Download Full-text

System performance analysis of hybrid time-power switching protocol of EH bidirectional relaying network in amplify-and-forward mode

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v14.i1.pp118-126 ◽

2019 ◽

Vol 14 (1) ◽

pp. 118

Author(s):

Phu Tran Tin ◽

Minh Tran ◽

Tan N. Nguyen ◽

Thanh-Long Nguyen

Keyword(s):

System Performance ◽

Ergodic Capacity ◽

System Throughput ◽

Amplify And Forward ◽

Power Switching ◽

System Parameters ◽

Transmission Modes ◽

Bidirectional Relaying ◽

Delay Tolerant ◽

Parameter Values

<p><span>In this paper, we investigate system performance in term of throughput and ergodic capacity of the hybrid time-power switching protocol of energy harvesting bidirectional relaying network. In the first stage, the analytical expression of the system throughput and ergodic capacity of the model system is proposed and derived. In this analysis, both delay-limited and delay-tolerant transmission modes are presented and considered. After that, the effect of various system parameters on the proposed system is investigated and demonstrated by Monte-Carlo simulation. Finally, the results show that the analytical mathematical and simulated results match for all possible parameter values for both schemes.</span></p>

Download Full-text

On the Study of Cognitive Bidirectional Relaying with Asymmetric Traffic Demands

Frequenz ◽

10.1515/freq-2014-0141 ◽

2015 ◽

Vol 69 (5-6) ◽

Cited By ~ 1

Author(s):

Xiaodong Ji

Keyword(s):

Ergodic Capacity ◽

Base Station ◽

Transmission Protocol ◽

Splitting Algorithm ◽

Performance Simulation ◽

Information Theoretic ◽

Primary Users ◽

Operating Region ◽

Bidirectional Relaying ◽

Outage Probabilities

AbstractIn this paper, we consider a cognitive radio network scenario, where two primary users want to exchange information with each other and meanwhile, one secondary node wishes to send messages to a cognitive base station. To meet the target quality of service (QoS) of the primary users and raise the communication opportunity of the secondary nodes, a cognitive bidirectional relaying (BDR) scheme is examined. First, system outage probabilities of conventional direct transmission and BDR schemes are presented. Next, a new system parameter called operating region is defined and calculated, which indicates in which position a secondary node can be a cognitive relay to assist the primary users. Then, a cognitive BDR scheme is proposed, giving a transmission protocol along with a time-slot splitting algorithm between the primary and secondary transmissions. Information-theoretic metric of ergodic capacity is studied for the cognitive BDR scheme to evaluate its performance. Simulation results show that with the proposed scheme, the target QoS of the primary users can be guaranteed, while increasing the communication opportunity for the secondary nodes.

Download Full-text

Performance Analysis for Exact and Upper Bound Capacity in DF Energy Harvesting Full-Duplex with Hybrid TPSR Protocol

Journal of Electrical and Computer Engineering ◽

10.1155/2021/6610107 ◽

2021 ◽

Vol 2021 ◽

pp. 1-9

Author(s):

Phu Tran Tin ◽

Phan Van-Duc ◽

Tan N. Nguyen ◽

Le Anh Vu

Keyword(s):

Energy Harvesting ◽

Upper Bound ◽

Relay Node ◽

Ergodic Capacity ◽

Cooperative Relaying ◽

Spectrum Efficiency ◽

Full Duplex ◽

Power Splitting ◽

Decode And Forward ◽

Relaying System

In this paper, we investigate the full-duplex (FD) decode-and-forward (DF) cooperative relaying system, whereas the relay node can harvest energy from radiofrequency (RF) signals of the source and then utilize the harvested energy to transfer the information to the destination. Specifically, a hybrid time-power switching-based relaying method is adopted, which leverages the benefits of time-switching relaying (TSR) and power-splitting relaying (PSR) protocols. While energy harvesting (EH) helps to reduce the limited energy at the relay, full-duplex is one of the most important techniques to enhance the spectrum efficiency by its capacity of transmitting and receiving signals simultaneously. Based on the proposed system model, the performance of the proposed relaying system in terms of the ergodic capacity (EC) is analyzed. Specifically, we derive the exact closed form for upper bound EC by applying some special function mathematics. Then, the Monte Carlo simulations are performed to validate the mathematical analysis and numerical results.

Download Full-text