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Cognitive Radio Network Architectureand its Applications

Vijay A GoudDept of ECE

1!"1#"$##%&

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.icrowave and Radar Engineering  ,s/ania 0niversity

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• 'ntroduction to cognitive radio

• unda/entals of cognitive radio technology

• Architecture of cognitive radio network

•

Concept of spectru/ sensing• 'ssues in dyna/ic spectru/ allocation and

sharing

• Applications of cognitive radio

•

Conclusion• References

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'ntroduction to cognitiveradio

• 2carcity of co//unication resources

• 'ncreased nu/3er of wireless users

• 'ne4cient usage of licensed spectru/

• 'ncreased tra4c in license free 3and

•  deploy/ent of dyna/ic spectru/ access techni5ues• 'nnovative co//unication technology to address the a3ove

issues

•  -he concept of cognitive radio is proposed

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unda/entals of cognitive radio technology

 

Cognitive radio characteristicsa6 Cognitive capa3ility

3 6 Recon7gura3ilty

Cognitive radio functions

a6 2pectru/ sensing and analysis

36 2pectru/ /anage/ent and hando8

c6 2pectru/ allocation and sharing

V'(A)*(AN +1!*C,GN'-'VE RAD',

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unda/entals of cognitive radio technology

 

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unda/entals of cognitive radio technology

 

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Architecture of cognitive radio network

  Co/ponents of architecture

16pri/ary network

  +6pri/ary 3ase station

  %6secondary network

  #6secondary 3ase station

  !6spectru/ 3roker

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Architecture of cognitive radio network

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2pectru/ sensing andanalysis

• Energy detector

16/ost co//on type of spectru/ sensing

+6easy to i/ple/ent

%6re5uires no prior knowledge of pri/ary signal

• eature detector16inherent periodicity in signals co/pared to noise

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2pectru/ sensing and analysis

• .atched 7ltering and coherent detection

16prior infor/ation a3out pri/ary signal is re5uired

• Cooperative sensing

16user selection+6decision fusion

%6e4cient infor/ation sharing

#6disri3uted cooperative sensing

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Dyna/ic spectru/ allocation and

sharing

• ,pen spectru/ sharing

• 9ierarchical access /odel

16specrtu/ underlay

secondary and pri/ary 3oth e:ists

+6spectru/ overlay

secondary e:ists only when pri/ary a3sent

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'ssues in D2A and sharing

A6 .ediu/ access control in CR networks

;6 2pectru/ hando8 

C6 Cognitive relaying

D6 2pectru/ sensing and access

E6

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'ssues Continued=

6 Control channel /anage/ent

G 6 Distri3uted spectru/ sharing

9 6 2pectru/ sharing ga/e

' 6 Routing in a CR network

 ( 6 Cooperation sti/ulation and enforce/ent> 6 2ecurity in CR networks

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Applications of cognitive radio

• '/proving the capacity of /ilitary co//unications

• Enhancing pu3lic safety and ho/eland security

• acilitates interopera3ility 3etween variousco//unications syste/s

•

Co//ercial applications like data processing• 2ecure co//unication

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  C,NC?02',N

Cognitive Radio -echnology is the solution towards /oree4cient utili@ation of the scarce spectru/ resources in anadaptive and intelligent way

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References

1B acilitating opportunities for e:i3le e4cient and relia3lespectru/

use e/ploying cognitive radio technologiesF Notice of proposed rule

/aking and order CC Dec6 +% CC Doc6 E- Docket No6 %"1H6

+B (6 .itola Cognitive radioF An integrated agent architecture for

softwarede7ned radio -9 Royal 'nst6 of -echnol6

2tockhol/ 2weden +6

%B 2pectru/

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