Optimal Throughput for Cognitive Radio with Energy Harvesting in Fading Wireless Channel

Abstract

Energy resource management is a crucial problem of a device with a finite capacity battery. In this paper, cognitive radio is considered to be a device with an energy harvester that can harvest energy from a non-RF energy resource while performing other actions of cognitive radio. Harvested energy will be stored in a finite capacity battery. At the start of the time slot of cognitive radio, the radio needs to determine if it should remain silent or carry out spectrum sensing based on the idle probability of the primary user and the remaining energy in order to maximize the throughput of the cognitive radio system. In addition, optimal sensing energy and adaptive transmission power control are also investigated in this paper to effectively utilize the limited energy of cognitive radio. Finding an optimal approach is formulated as a partially observable Markov decision process. The simulation results show that the proposed optimal decision scheme outperforms the myopic scheme in which current throughput is only considered when making a decision.

Joint impact of sensing time and IED parameter on the performance of an energy efficient cognitive radio system

“…Proof of (12)- (14) are given in Appendix. Figure 3 shows that the approximated CDF of T is matched closely to the CDF of T obtained from simulation of (5).…”

“…Hence, it is required to make some balance between observation time and transmission time. In , author investigated network throughput of an energy harvesting CR network. In , an optimal sensing time is studied for a CED‐based CR system.…”

“…JOINT IMPACT OF SENSING TIME AND IED PARAMETER 2263 between observation time and transmission time. In [4,5], author investigated network throughput of an energy harvesting CR network. In [6,7], an optimal sensing time is studied for a CED-based CR system.Consumption of energy for the systems, which are lead by the battery power is also an important issue nowadays.…”

Cognitive radio network with continuous energy‐harvesting

“…In [12], author investigated throughput and ergodic capacity of an energy harvesting wireless decode-and-forward relay network. An optimal mode decision policy to maximize the throughput for a non-RF energy harvester based CR system has been proposed in [13]. A pair of optimal sensing duration and sensing threshold have investigated in order to maximize the average throughput of an energy harvesting secondary network under energy causality constraints and collision constraints in [14].…”

POMDP-Based Throughput Maximization for Cooperative Communications Networks with Energy-Constrained Relay under Attack in the Physical Layer

“…The energy harvesting technique is applied to deal with energy-constrained problem at the relay; however, the limited energy arrival rate is also taken into account where the relay can harvest non-RF energy from the ambient environment with a limited amount of energy in each time slot [22,25]. Moreover, the imperfection of the spectrum sensing mechanism [20,21,28] on the jamming detection at the source is also considered.…”