Optimal Transmission Policies for Multi-Hop Energy Harvesting Systems

Abstract

In this paper, we consider a multi-hop energy harvesting (EH) communication system in a fullduplex mode, where arrival data and harvested energy curves in the source and the relays are modeled as general functions. This model includes the EH system with discrete arrival processes as a special case. We investigate the throughput maximization problem considering minimum utilized energy in the source and relays and find the optimal offline algorithm. We show that the optimal solution of the twohop transmission problem have three main steps: (i) Solving a point-to-point throughput maximization problem at the source; (ii) Solving a point-to-point throughput maximization problem at the relay (after applying the solution of first step as the input of this second problem); (iii) Minimizing utilized energy in the source. In addition, we show that how the optimal algorithm for the completion time minimization problem can be derived from the proposed algorithm for throughput maximization problem. Also, for the throughput maximization problem, we propose an online algorithm and show that it is more efficient than the benchmark one (which is a direct application of an existing point-to-point online algorithm to the multi-hop system).

Ultragreen Relay Transmission With Wireless Power Transfer for Advanced IoT: Session-Specific Analysis and Optimization

“…where P * T S S was given in Eq. (20). The corresponding optimal time switching factor for this case becomes…”

“…[19] formulated and solved an energy efficiency optimization problem considering relays' energy harvesting constraints and average throughput constraint. [20] considered a multi-hop transmission system with EH relays, where the energy consumption of source node is minimized. [21] studied the joint transmit power minimization and EH relay selection problem to save the energy of multiple non-energy-harvesting transmitters.…”

Online Power Control and Optimization for Energy Harvesting Communication System Based on State of Charge

“…In [17], the authors focus on the situation of hybrid energy storage, and battery imperfections situation is discussed in [18]. In [19], the authors consider a multihop EH communication system and cover all possible harvesting profiles including continuous and discrete cases. Overall the solution of offline strategies show the upper bound of optimized throughput.…”

Energy management in harvesting enabled sensing nodes: Prediction and control

“…In addition, memoryless [50] and temporally correlated [36], [39] models have been considered, infinite [51] and finite [39], [49], [52] buffer capacities have been accounted for, some cases in the presence of fading communication channels [41], [31], Gaussian relay channels [46] or additive white Gaussian channels [47]- [49]. Note also that battery imperfections have been considered in [53], non ideal circuit power transmitter has been considered in [47], multi-hop duplex communications have been considered in [54], reinforcement learning techniques have been incorporated in [55] and recently in [56] it has been identified that the transmission scheduling policy does affect the EH model, a process which is naturally modelled by feedback. Significant above works involve stochastic representations of the underlying processes [9].…”