Cognitive radio - the regulatory challenge [Jim Connolly]

7/21/2010
Cognitive radio
The Regulatory Challenge
Jim Connolly
Senior Spectrum Advisor

2
Overview
Software Defined Radio & Cognitive Radio
Techniques for Cognitive Radio
Access Models
Opportunities for Ireland?

Software Defined Radio (SDR)
A radio transmitter and/or receiver employing a technology that:
allows the RF operating parameters including, but not limited to, frequency range, modulation type, or output power to be set or altered by software, excluding changes to operating parameters which occur during the normal pre-installed and predetermined operation of a radio according to a system specification or standard
Source: ITU-R Study Group 1
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Cognitive Radio System (CR)
A radio system employing technology that allows the system:
To obtain knowledge of its operational and geographical environment, established policies and its internal state;
to dynamically and autonomously adjust its operational parameters and protocols according to its obtained knowledge in order to achieve predefined objectives; and
to learn from the results obtained
Source: ITU-R Study Group 1
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Techniques for Cognitive Radio (1)
Spectrum Sensing
Sense radio signals from other (nearby) radio transmitters; adjust radio transmission parameters dynamically
Failure to detect in-band transmitter leads to interference - the so-called “Hidden Node” problem:
Obstacle
Acannot sense B
Device A
Cognitive Radio Transceiver
Device B
Transmitter
Device C
Receiver
Transmission from Ainterferes with reception of C
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Techniques for Cognitive Radio (2)
Location Awareness & Geo-location Databases
Each Cognitive Radio device is able to determine its location and the location of other transmitters or receivers
Tries to avoid the Hidden Node problem by consulting a central database of nearby transmitters and adjusting radio parameters to avoid interference
Requires database(s) to be maintained; challenging
Cognitive Pilot Channel (CPC)
Dedicated carrier providing frequency usage information for the intended band in a given area. (CPC could be within the intended band or an internationally designated frequency outside the band)
Requires Availability, Reliability, Accuracy & Security of the information
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Access Models
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Frequency bands & technical conditions identified & defined by regulator
Framework for trading / leasing of spectrum rights defined by regulator.
Spectrum identified by primary licensed users
(OSA = Opportunistic Spectrum Access
Source: Ministry of Economic Affairs, The Netherlands

Opportunities for Ireland?
‘Spot market’ software tools
Database hosting
Test and Trial Ireland – for trying out technology/applications www.testandtrial.ie
Other?
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Cognitive radio - the regulatory challenge [Jim Connolly]

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Cognitive radio - the regulatory challenge [Jim Connolly] — Presentation Transcript

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