Cognitive and Opportunistic Radio Activities

1
Cognitive and Opportunistic Radio Activities

• University of Surrey
• Centre for Communication Systems Research
• Klaus Moessner

2
The CR team

• Who are we?
• 5 Research Fellows
• 2 PhD Students
• 5 MSc Students
• What do we do?
• Methods for optimisation of radio resource usage
  (DSA)
• Distributed and cooperative sensing approaches
• Distributed decision making
• CR and Spectrum Optimisation projects we are
  involved in
• IST E2R II
• IST ORACLE
• Mobile VCE Delivery Efficiency

3
Some definitions

• Fixing the terms
• SDR ? enabling Technology
• End to End Reconfigurability ? SDR applied in a
  system context, aiming at overall, system wide
  resource efficiency (intelligent and flexible
  resource planning)
• CR ? intelligence and independence to achieve
  resource efficiency, can be based on MMs
  (switching) or on SDR (reconfiguring)

4
Our Vision

• Efficient use of Radio Resources
• sharing, trading allocation schemes
• Reconfigurability
• RAT multihoming and concurrent-operation
• radio protocol stack reconfiguration
• Intelligence
• context gathering, filtering and interpretation
• policy handling (definition, scope,
  interpretation)
• Independence
• control, management, responsibility, fallbacks
• decision making implementation

5
Some issues

• Level of detail
• Mitolas CR vs Radio CR
• Applicability
• Stand alone vs cooperating vs network-interworking
  
• Weight of intelligence
• Where should decisions being made?
• Independence
• I Base Station (Lucent)

6
Some more issues

• CS rather than CR?
• application scenarios
• Degree of centralisation in decision making
• Terminal architectures
• dynamic range (30MHz-60GHz)
• plenty of spectrum .. But only interest for
  some parts of it
• sensing/cooperative sensing