Outage Analysis and Optimization for Four-Phase Two-Way Transmission with Energy Harvesting Relay

Abstract

This paper investigates the outage performance and optimization for the four-phase two-way transmission network with an energy harvesting (EH) relay. To enable the simultaneous information processing and energy harvesting at the relay, we firstly propose a power splitting-based two-way relaying protocol (PSTWR). Then, we discuss its outage performance theoretically and derive an explicit expression for the system outage probability. In order to find the optimal system configuration parameters such as the optimal power splitting ratio and the optimal transmit power redistribution factor, we formulate an outage-minimized optimization problem. As the problem is difficult to solve, we design a genetic algorithm (GA) based algorithm for it. Besides, we also investigate the effects of the power splitting ratio, the power redistribution factor at the relay, and the source to relay distance on the system outage performance. Finally, extensive simulation results are provided to demonstrate the accuracy of the analytical results and the effectiveness of the GA-based algorithm. Moreover, it is also shown that, the relay position greatly affects the system performance, where relatively worse outage performance is achieved when the EH relay is placed in the middle of the two sources.

Outage Analysis and Optimization for Time Switching-based Two-Way Relaying with Energy Harvesting Relay Node

“…In this paper, we also investigate the two-way relay network with SWIET. Compared with previous work [12][13], some differences are stressed here. Firstly, we considered time switching receiver architecture (another practically reliable receiver) rather than the power splitting receiver architecture, because time-switching based EH receiver is relatively simpler than the power-splitting based EH receiver.…”

“…The signal processing energy cost is not considered in this paper, thus relaying transmission is the only energy operating cost for the system. Such an assumption is also widly adpoted in similar articles[5,[12][13][23][24].…”

“…Because most devices used in wireless network are surrounded by RF signals (e.g., Wi-Fi signals or cellular signals), the technology of SWIET is particularly suitable for cooperative communication networks, where the transmissions of cooperation nodes can be powered by the energy harvested from the incoming signals rather than external energy supply. So far, the concept of SWIET has been extended to various wireless systems, such as relaying systems [5][6][7], multiple-input multiple-output (MIMO) systems [8], orthogonal frequency division multiplexing (OFDM) systems [9], and cooperative transmission systems [10][11][12][13], etc.…”

Simultaneous Wireless Information and Power Transfer in Two-hop OFDM Decode-and-Forward Relay Networks

“…In [18], outage probability was analyzed for two-hop one way AF relay-aided systems where both TS and PS reciever architectures were considered. The outage performances were respectively studied for two-way relay system with TS receiver architecture in [19,20] and for relay broadcast system with TS and PS receiver architectures in [21]. In [22], joint information and energy cooperation was studied for cognitive radio networks with PS and TS reciever architectures, where the cooperation between the primary and secondary systems was involved.…”