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ETSI STF386 on Cognitive PMSE
Chairmen: Wolfgang Bilz & Prof. Georg Fischer
Status and Next Steps
Input to Global Standards Collaboration (GSC)
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Agenda
1. STF386 Status
2. Alignment with German C-PMSE Project
3. Next Steps
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STF386 Status
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STF386 Status
Team
Edgar Reihl P.E.
(Shure US)
Wolfgang Bilz
(Shure EU)
Chairman
Clemens Kunert
(IRT )
Dr. Radu Circa
(Bosch conference
systems)
Prof. Georg Fischer
(UNI Erlangen)
Chairman
Matthias Fehr
(APWPT)
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Dr. Axel Schmidt
(Sennheiser)
Dr. Maria Dolores
Perez-Guario
(UNI Hannover)
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STF386 Status
Deliverables
Phases
• Phase A deliverable: Technical Report ETSI TR102799
 “Operation methods and principles for spectrum access systems
and quality control of used spectrum for PMSE technologies
utilising cognitive interference mitigation techniques”

 TB approval January 2010
• Phase B deliverable: Technical Specification ETSI TR102800

 TS on the recommended spectrum access technique
 TB approval expected October 2010
• Phase C deliverable: ETSI Technical Report TR102801
 TR on the different RF compliance tests for the selected
spectrum access mechanism:
Work in progress
 TB approval mid 2012 ?
 Support by German national Research project BMWI C-PMSE
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STF386 Status
Schedule
To Dos
• New work item C-PMSE needs to be prepared and kicked off in ETSI!
• Financing and contract for Phase C needs to be fixed!
Experimental Platform / BMWI Research Project C-PMSE
Phase A
Phase B
2010
2009
Start
28. Sept
Phase C
Technical
Report
TR102799
2011
2012
Technical
Report
TR102800
Technical
Report
TR102801
New Work
Item in ETSI ?
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2013
time
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STF386 Status
Proposed architecture
Scanning Receiver
Subsystem (SCS)
Scanning
Receiver
(SCR)
Frequency
coordinator
(FCO)
m
fci
Multiple
sniffers!
Hierarchical
database with
geolocation
Regulatory
Scanning Receiver
Controller (SCC)
fci
sci
sci
Radio Resource Manager
(RRM)
Service
Level Entry
(SLE)
Service
Level
Monitor
(SLM)
Database
REM
Cognitive Engine
(CEN)
LPS
sli
CEN
Fusion Engine
(FEN)
Cyclic Unit
(CYU)
FAT
PAT
AMCT
DAT
cpi
ABT
(Ask before talk)
and
LBT
(Listen before talk)
RRM
rmi
Optimisation
Engine (OEN)
cmi
rpi
ASQ
DecisionMaker Engine
(DEN)
Standardized
interfaces, rest
is proprietary
n
Proactive rather
reactive !
Performance
Monitor
(PMO)
Radio
Link
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C-PMSE
1
C-PMSE
2
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STF386 Status
Proactive behaviour
Rationale for using
multiple Scanning
receivers
• Predict
approaching
interferers
SCR-4
Roof
SCR-1
SCR-2
SCR-0
SCR-3
• Determine
Gradients in C/I,
BER
• Determine
movement profile
• Compose Radio
Environment Map
incl. Movement
directions
Doors
Movement of interferer
Stage with
Wireless Mics
Receivers
Foyer
Interferer
Indoor
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Entrance Hall
Outdoor
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STF386 Status
Link quality supervision
Quality of service
Gradient Detection
New proposed proactive
scheme with C-PMSE
C-PMSE
Cellular
Quality
Threshold
Reactive scheme with cellular
Action i.e. change
of RRM parameter
Time
RRM proactive scheme
• C-PMSE detects quality below threshold in advance from gradient
• Cellular reactive scheme e.g. power control
• C-PMSE needs proactive scheme! (Ensure production quality 100% of time)
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STF386 Status
Hierarchical database approach
Database at
Regulator
More seldom
updates
Frequency
Manager Database
More accurate
Location info
Regional Database
Local Database
Inside C-PMSE1
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• Use same approach as in IP
world, DHCP lease for IP
address, grant valid for a
certain lease time
• Spectrum grant: spectrum
amount+location+duration+
TX power
• Use offline copy, no
permanent connectivity
required, synchronize from
time to time
• M2M or manual Web
interface for legacy support
Local Database
Inside C-PMSE2
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Alignment with German
C-PMSE Project
Alignment with German C-PMSE Project
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Project set up
German C-PMSE Project
• Funded by BMWI (Ministry of Economics)
• Runs April 2011 till June 2013
• Project Size 7.5 Mil €
• Project Partners and STF386 partners partially overlap, but not identical
Main Goals of project
• Concept refinement from implement ability point of view
• Realization of a cognitive PMSE system
• Practical real world demonstration, planned Messe Berlin
Link between ETSI STF386 and BMWI C-PMSE
• There is no contractual link between ETSI STF386 and BMWI C-PMSE project
• However common understanding and interests
• Refinement of Architecture and lessons learnt will go back into ETSI through STF386
• Valuable input for new standardization process
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STF386 plans
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Relation between BMWI C-PMSE and STF386
STF386  C-PMSE
• Technical Reports TR102799 and TR102800 have sketched the core concepts and
procedures  Starting point for C-PMSE
• STF386 can provide guidance in cases, where procedures, architecture partionings
and rationales are unclear
• STF386 can respond to inquires by C-PMSE, clarify open issues
• Consulting on decisions between implementation options, comment on implications for
the whole system
C-PMSE  STF386
• Findings by C-PMSE can go into Phase C document TR102801
• STF386 can use interim results for refinement of C-PMSE architecture
• Valuable input for kick-off of new work item in ETSI
Jointly STF386 and C-PMSE
• Accompany standardisation process
• Fast kick off new work item
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Alignment with German C-PMSE Project
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Lacking Technology identified
Soft Degradation with digital transmission
• Digital transmission typically has sharp edge in quality
• Analogue FM has an inherent soft degradation mechanism, the noise in the back simply raises
• Fine granular Adaptive Modulation and Coding would be necessary with digital transmission
Source coding
• Analogue source coding by companders actually in use
• Digital source coding should be “waveform conservative”, so should not profit from psychoacoustic
effects (like assumed e.g. in MP3). Avoids artefacts with cascade of Codecs.
• Potential candidate e.g. “Spherical logarithmic quantization” (SLQ)
Bidirectional Signalling
• Signalling not available so far, only content plane
• Bidirectional signalling plane needs to be added
• Signalling plane can use other transmission technology than content plane
Link Quality Monitor
• RSSI was found not to be sufficient
• An indicator for actual link quality needed
• A measure that is dependent on C/I needed
• Difficult with analogue FM, but not impossible...
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Next Steps
Next Steps
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To Dos
At ETSI ERM side
• Letter of Engagement LoE needs extension to cover third phase
• Budget needs to be put in place
• An MOU between ETSI ERM and BMWI C-PMSE would make sense
• Strategy for preparation of new work item should be defined
At BMWI C-PMSE side
• Conceptual refinements on architecture need to be agreed and freeze to be handed
over to ETSI STF386
At ETSI STF386 side
• Funding has to settle
• Next meetings need to be scheduled
• Date for next document TR102801 should be revisited and set in order to match
schedule of BMWI C-PMSE
• Contribution to preparation of New Work Item
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Backup
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What’s hot?
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What’s hot?
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What people say...
Transmission Technology
• Some people say analogue FM is behind. The problems with PMSE are due to the
fact, that PMSE has not digitized yet.
Not true - Calculations have shown that analogue FM indeed is very spectrally
efficient.
• In Light of quality that has to be delivered, PMSE is performing even better than
cellular.
• Most other systems catch their gains from heavy source coding and suffer from
dramatic signalling overhead.
Cellular technology
• Some people say PMSE should simply take over well established technology from
cellular.
• Not that easy, due to a lot of specifics with PMSE (latency, interruption free, soft
degradation, lossless coding).
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What’s hot?
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What people say...
Source Coding
• Some people say that PMSE should use source coding to save spectrum
• Not that easy due to other coding schemes in distribution, cascaded codecs lead to
artefacts
• Only waveform conservative codecs possible
• Very tough latency constraints
CR Technology
• Some people say the PMSE community is blocking new CR technology
• PMSE community cannot accept that a WSD is interfering with a production
• WSD that just do LBT without ABT are unacceptable due to hidden node problem
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What’s hot?
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What people say...
Hardware/RF Technology
• Some people say, the hardware with PMSE is old fashioned...
• The constraints imposed by battery and operating time make it difficult to introduce a
lot of processing
• Analogue in principle is more powerful than digital
• However some opportunities are there: More linear RF chains, Switch mode PAs
Introduction of new PMSE technology
• Spectrum and radio resource management is a matter of signalling
• Only Signalling plane of communication is affected (Handover, power control)
• Content plane (Audio signal) can stay analogue
• Changes with signalling plane and content plane can be advanced separately
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