Cognitive radio networks with energy harvesting

Sungsoo Park, Hyungjong Kim, Daesik Hong

Research output: Contribution to journalArticle

187 Citations (Scopus)

Abstract

We consider a cognitive radio network with an energy-harvesting secondary transmitter to improve both energy efficiency and spectral efficiency. The goal of this paper is to determine an optimal spectrum sensing policy that maximizes the expected total throughput subject to an energy causality constraint and a collision constraint. The energy causality constraint comes from the fact that the total consumed energy should be equal to or less than the total harvested energy, while the collision constraint is required to protect the primary user. We first show that the system can be divided into a spectrum-limited regime and an energy-limited regime depending on where the detection threshold for the spectrum sensor lies. Assuming infinite battery capacity, we derive the optimal detection threshold that maximizes the expected total throughput subject to the energy causality constraint and the collision constraint. Analytical and numerical results show that the system is energy-limited if the energy arrival rate is lower than the expected energy consumption for a single spectrum access. They also show that a decreasing probability of accessing the occupied spectrum does not always result in decreased probability of accessing the idle spectrum in the energy-limited regime.

Original languageEnglish
Article number6449254
Pages (from-to)1386-1397
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume12
Issue number3
DOIs
Publication statusPublished - 2013 Feb 8

Fingerprint

Energy Harvesting
Cognitive Radio Networks
Energy harvesting
Cognitive radio
Throughput
Energy
Energy efficiency
Transmitters
Energy utilization
Causality
Sensors
Collision
Maximise
Spectrum Sensing
Spectral Efficiency
Less than or equal to
Energy Efficiency
Battery
Transmitter
Energy Consumption

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Park, Sungsoo ; Kim, Hyungjong ; Hong, Daesik. / Cognitive radio networks with energy harvesting. In: IEEE Transactions on Wireless Communications. 2013 ; Vol. 12, No. 3. pp. 1386-1397.
@article{0578a60e866c48b89805214ce9a06a9a,
title = "Cognitive radio networks with energy harvesting",
abstract = "We consider a cognitive radio network with an energy-harvesting secondary transmitter to improve both energy efficiency and spectral efficiency. The goal of this paper is to determine an optimal spectrum sensing policy that maximizes the expected total throughput subject to an energy causality constraint and a collision constraint. The energy causality constraint comes from the fact that the total consumed energy should be equal to or less than the total harvested energy, while the collision constraint is required to protect the primary user. We first show that the system can be divided into a spectrum-limited regime and an energy-limited regime depending on where the detection threshold for the spectrum sensor lies. Assuming infinite battery capacity, we derive the optimal detection threshold that maximizes the expected total throughput subject to the energy causality constraint and the collision constraint. Analytical and numerical results show that the system is energy-limited if the energy arrival rate is lower than the expected energy consumption for a single spectrum access. They also show that a decreasing probability of accessing the occupied spectrum does not always result in decreased probability of accessing the idle spectrum in the energy-limited regime.",
author = "Sungsoo Park and Hyungjong Kim and Daesik Hong",
year = "2013",
month = "2",
day = "8",
doi = "10.1109/TWC.2013.012413.121009",
language = "English",
volume = "12",
pages = "1386--1397",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

Cognitive radio networks with energy harvesting. / Park, Sungsoo; Kim, Hyungjong; Hong, Daesik.

In: IEEE Transactions on Wireless Communications, Vol. 12, No. 3, 6449254, 08.02.2013, p. 1386-1397.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Cognitive radio networks with energy harvesting

AU - Park, Sungsoo

AU - Kim, Hyungjong

AU - Hong, Daesik

PY - 2013/2/8

Y1 - 2013/2/8

N2 - We consider a cognitive radio network with an energy-harvesting secondary transmitter to improve both energy efficiency and spectral efficiency. The goal of this paper is to determine an optimal spectrum sensing policy that maximizes the expected total throughput subject to an energy causality constraint and a collision constraint. The energy causality constraint comes from the fact that the total consumed energy should be equal to or less than the total harvested energy, while the collision constraint is required to protect the primary user. We first show that the system can be divided into a spectrum-limited regime and an energy-limited regime depending on where the detection threshold for the spectrum sensor lies. Assuming infinite battery capacity, we derive the optimal detection threshold that maximizes the expected total throughput subject to the energy causality constraint and the collision constraint. Analytical and numerical results show that the system is energy-limited if the energy arrival rate is lower than the expected energy consumption for a single spectrum access. They also show that a decreasing probability of accessing the occupied spectrum does not always result in decreased probability of accessing the idle spectrum in the energy-limited regime.

AB - We consider a cognitive radio network with an energy-harvesting secondary transmitter to improve both energy efficiency and spectral efficiency. The goal of this paper is to determine an optimal spectrum sensing policy that maximizes the expected total throughput subject to an energy causality constraint and a collision constraint. The energy causality constraint comes from the fact that the total consumed energy should be equal to or less than the total harvested energy, while the collision constraint is required to protect the primary user. We first show that the system can be divided into a spectrum-limited regime and an energy-limited regime depending on where the detection threshold for the spectrum sensor lies. Assuming infinite battery capacity, we derive the optimal detection threshold that maximizes the expected total throughput subject to the energy causality constraint and the collision constraint. Analytical and numerical results show that the system is energy-limited if the energy arrival rate is lower than the expected energy consumption for a single spectrum access. They also show that a decreasing probability of accessing the occupied spectrum does not always result in decreased probability of accessing the idle spectrum in the energy-limited regime.

UR - http://www.scopus.com/inward/record.url?scp=84875589001&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875589001&partnerID=8YFLogxK

U2 - 10.1109/TWC.2013.012413.121009

DO - 10.1109/TWC.2013.012413.121009

M3 - Article

VL - 12

SP - 1386

EP - 1397

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 3

M1 - 6449254

ER -