Spektrin sensorointiin perustuva kanavanvalinta kognitiivisessa radiojärjestelmässä

Pro gradu

Janne Kusmin

Research output: ThesisMaster's thesisTheses

Abstract

The use of wireless devices is increasing continuously but frequencies where the devices operate are limited. This causes a growing need to allocate spectrum frequencies more efficiently. Cognitive radio has been proposed as a solution to this problem. A cognitive radio system aims at reusing sparsely occupied frequency bands. The objective of this research was to study WLAN channel sensing time and channel switching time using a cognitive radio system named CORAL in the ISM band. In addition, possibilities of using the historical data in channel selection were discussed. Constructive research was used as a research method in this work. Information was gathered from scientific articles for this research. Channel sensing times were studied by making channel sensing algorithms which print out the sensing times. Channel switching times were measured by studying the video streams from one computer to another. The use of historical data in channel selection was studied with literature. The research provided knowledge about channel sensing times and channel switching times in the CORAL system. The study shows that historical data can be used to make better channel selections in cognitive radio systems. The median sensing time in the CORAL system was 6 seconds with one channel. The sensing time was 13 seconds for two channels, 17 seconds for three channels, and 25 seconds for eleven channels. The median channel switching times in CORAL system was 9.6 seconds with eleven channels, 2.9 seconds with three channels, and 2.8 seconds with one channel.
Original languageFinnish
QualificationMaster Degree
Awarding Institution
  • University of Oulu
Place of PublicationOulu
Publisher
Publication statusPublished - 2012
MoE publication typeG2 Master's thesis, polytechnic Master's thesis

Keywords

  • wireless transmission
  • telecommunication
  • algorithms

Cite this

@phdthesis{c22bdb07fd3c44a1973e040e585403a7,
title = "Spektrin sensorointiin perustuva kanavanvalinta kognitiivisessa radioj{\"a}rjestelm{\"a}ss{\"a}: Pro gradu",
abstract = "The use of wireless devices is increasing continuously but frequencies where the devices operate are limited. This causes a growing need to allocate spectrum frequencies more efficiently. Cognitive radio has been proposed as a solution to this problem. A cognitive radio system aims at reusing sparsely occupied frequency bands. The objective of this research was to study WLAN channel sensing time and channel switching time using a cognitive radio system named CORAL in the ISM band. In addition, possibilities of using the historical data in channel selection were discussed. Constructive research was used as a research method in this work. Information was gathered from scientific articles for this research. Channel sensing times were studied by making channel sensing algorithms which print out the sensing times. Channel switching times were measured by studying the video streams from one computer to another. The use of historical data in channel selection was studied with literature. The research provided knowledge about channel sensing times and channel switching times in the CORAL system. The study shows that historical data can be used to make better channel selections in cognitive radio systems. The median sensing time in the CORAL system was 6 seconds with one channel. The sensing time was 13 seconds for two channels, 17 seconds for three channels, and 25 seconds for eleven channels. The median channel switching times in CORAL system was 9.6 seconds with eleven channels, 2.9 seconds with three channels, and 2.8 seconds with one channel.",
keywords = "wireless transmission, telecommunication, algorithms",
author = "Janne Kusmin",
note = "TK611 Oulun yliopisto, Tietojenk{\"a}sittelytieteiden laitos SDA: MEL",
year = "2012",
language = "Finnish",
publisher = "University of Oulu",
address = "Finland",
school = "University of Oulu",

}

Spektrin sensorointiin perustuva kanavanvalinta kognitiivisessa radiojärjestelmässä : Pro gradu. / Kusmin, Janne.

Oulu : University of Oulu, 2012. 66 p.

Research output: ThesisMaster's thesisTheses

TY - THES

T1 - Spektrin sensorointiin perustuva kanavanvalinta kognitiivisessa radiojärjestelmässä

T2 - Pro gradu

AU - Kusmin, Janne

N1 - TK611 Oulun yliopisto, Tietojenkäsittelytieteiden laitos SDA: MEL

PY - 2012

Y1 - 2012

N2 - The use of wireless devices is increasing continuously but frequencies where the devices operate are limited. This causes a growing need to allocate spectrum frequencies more efficiently. Cognitive radio has been proposed as a solution to this problem. A cognitive radio system aims at reusing sparsely occupied frequency bands. The objective of this research was to study WLAN channel sensing time and channel switching time using a cognitive radio system named CORAL in the ISM band. In addition, possibilities of using the historical data in channel selection were discussed. Constructive research was used as a research method in this work. Information was gathered from scientific articles for this research. Channel sensing times were studied by making channel sensing algorithms which print out the sensing times. Channel switching times were measured by studying the video streams from one computer to another. The use of historical data in channel selection was studied with literature. The research provided knowledge about channel sensing times and channel switching times in the CORAL system. The study shows that historical data can be used to make better channel selections in cognitive radio systems. The median sensing time in the CORAL system was 6 seconds with one channel. The sensing time was 13 seconds for two channels, 17 seconds for three channels, and 25 seconds for eleven channels. The median channel switching times in CORAL system was 9.6 seconds with eleven channels, 2.9 seconds with three channels, and 2.8 seconds with one channel.

AB - The use of wireless devices is increasing continuously but frequencies where the devices operate are limited. This causes a growing need to allocate spectrum frequencies more efficiently. Cognitive radio has been proposed as a solution to this problem. A cognitive radio system aims at reusing sparsely occupied frequency bands. The objective of this research was to study WLAN channel sensing time and channel switching time using a cognitive radio system named CORAL in the ISM band. In addition, possibilities of using the historical data in channel selection were discussed. Constructive research was used as a research method in this work. Information was gathered from scientific articles for this research. Channel sensing times were studied by making channel sensing algorithms which print out the sensing times. Channel switching times were measured by studying the video streams from one computer to another. The use of historical data in channel selection was studied with literature. The research provided knowledge about channel sensing times and channel switching times in the CORAL system. The study shows that historical data can be used to make better channel selections in cognitive radio systems. The median sensing time in the CORAL system was 6 seconds with one channel. The sensing time was 13 seconds for two channels, 17 seconds for three channels, and 25 seconds for eleven channels. The median channel switching times in CORAL system was 9.6 seconds with eleven channels, 2.9 seconds with three channels, and 2.8 seconds with one channel.

KW - wireless transmission

KW - telecommunication

KW - algorithms

M3 - Master's thesis

PB - University of Oulu

CY - Oulu

ER -