Klaus Moessner 22.04.2008 WWRF 20, Ottawa, Canada CR MAKING SENSE -ON THE SLOPE OF ENLIGHTENMENT- SIG 1 – PANEL: Cognitive Radio:

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Presentation transcript:

Klaus Moessner WWRF 20, Ottawa, Canada CR MAKING SENSE -ON THE SLOPE OF ENLIGHTENMENT- SIG 1 – PANEL: Cognitive Radio: Hype or Reality?

Page 2WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa CR MAKING SENSE ON THE SLOPE OF ENLIGHTENMENT there was a lot of overselling -enables spectrum commons -increases spectrum efficiency by orders of magnitude -will be main technology in B3G CR can do a lot but not everything makes (immediate) sense -limiting the scope: use where required, not where possible

Page 3WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa Cognitive Radio and Hype

Page 4WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa Cognitive Radio and Hype

Page 5WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa Cognitive Radio and Hype Cognitive Radio Systems, rather than CR

Page 6WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa CR Making Sense on the slope of enlightenment CRs are only as good as the information they use for their decision making -definition of information scope -loads of sensing technologies but no quality indicators -interoperability between (spectrum sensors) Making Sense: -Secondary spectrum usage will come (already reality – 5GHz band) -Regulation will allow more dynamic allocation regimes -Reconfigurable radios will operate in different frequency ranges/bands and would have to apply different sensing architectures (band and space dependent sensing)

Page 7WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa CR Making Sense on the slope of enlightenment Making Sense: -Current sensing standards do concentrate on limited application scenarios/restricted use cases (e.g …) -Sensing issues are complex and there is no standard to capture all issues (service -Need for generic guidelines of how to sense in different use cases and situations

Page 8WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa CR Making Sense on the slope of enlightenment Making Sense: -Use case impact on sensing requirements

Page 9WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa Primary & Secondary Use cases -Emergency services -Sharing of spectrum to reduce blocking at peak traffic times -Self management of uncoordinated spectrum -Introduction of new users or services -Worldwide mobility -QoS for primary and secondary users CR Making Sense on the slope of enlightenment

Page 10WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa Sensing (research) issues Spectrum sensitivity requirements Avoid harmful interference caused towards primary users Rate of sensing for Primary User (PU) detection Requirements on Sensing protocols exploiting sensing information to minimize interference Degree of flexibility Collaborative sensing/information gathering Definition of sensing metrics … CR Making Sense on the slope of enlightenment

Page 11WWRF#20 · Klaus Moessner · · · Sig1 Panel · WWRF - Ottawa Interest group within SCC41 addresses issue of sensing for Distributed Spectrum Access and Advanced (Cognitive) Radio Systems more info: CR Making Sense on the slope of enlightenment