FRS Technology Assessment Step 2

1
FRS Technology Assessment Step 2 Common
Traffic Scenarios

• Phil Platt, Nikos Fistas
• AGCFG 3/WGC11
• 18-19 September 2006, Brussels

European Organisation for the Safety of Air
Navigation
2
Content

• Communication requirements
• Need for common set of scenarios
• Definition of test volumes
• Characteristics of the scenarios
• Application of the scenarios
• Next steps

3
Communication Requirements

• The communication requirements are defined by 4
  basic characteristics
• coverage area
• numbers of aircraft
• communication traffic (ATS and AOC)
• The COCR provides information on requirements
  using service volumes which are based on sectors
• Phase 1 - size as today
• Phase 2 - 3 times sector size of today

4
Common scenarios for technology assessment

• The coverage volume of specific technologies is
  dependent on their characteristics
• frequency band
• modulation
• data rate
• transmitter power/receiver sensitivity
• ..
• The requirements has to be defined in such a way
  that the technology can be assessed
• a set of scenarios are being developed for use
  in the technology assessment
• they can be used in the most relevant way for
  each technology
• Aimed at meeting Phase 2 requirements

5
Basic Test Volumes

• Initial set are based on 3 basic geometrical test
  volumes have been defined from the COCR for high
  density worse case situation in Phase 2

Volume (nm3)
Height Range
Dimensions
Shape
Service Volume
26
0 5000ft
10NM diameter
Cylinder
Airport
7691
5000ft FL245
49NM x 49NM
3D rectangle
TMA
10132
FL245 FL450
55NM x 55NM
3D rectangle
ENR
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Additional Test Volumes

• The COCR service volumes are based on
  operational sectors
• variety of shapes and densities
• not necessarily matched to technology capability
• The need to evaluate how a technology would be
  implemented in larger volumes as these affect
  infrastructure choices and/or spectrum needs
• Therefore additional test volumes are being
  created for
• Larger TMA type test volumes
• Larger ENR type test volumes
• Whole of ECAC - based on likely terrestrial
  coverage

7
Sets of test volumes
10NM
Airport
5000ft
Ground
TV2.2
TV2.1
75NM
49NM
TMA
FL245
5000ft
Ground
ENR
8
ECAC test volume
9
ECAC test volume

• The ECAC test volume has been defined as the
  sectors likely to be in coverage of a terrestrial
  system
• en route sectors
• TMA sectors
• Total PIAC derived from SAAM

10
Air/Air Test Volume

• COCR defines 3 ranges for a/a broadcast - 5NM,
  60NM and 200NM

11
Traffic Scenarios

• For each test volume, a traffic scenario is being
  developed giving
• Number of aircraft in the test volume (derived
  from SAAM data)
• Capacity requirements
• Uplink and downlink ATS and AOC capacity
  requirements per aircraft in respect of
• Air-Ground addressed transactions
• Air-Air addressed transactions
• Air-Ground broadcast transactions
• Air-Air broadcast transactions
• COCR does not identify requirements for a/a
  addressed or a/g broadcast

12
Sharing of Traffic Scenarios

• An Excel file is being created containing the key
  parameters that will define the set of scenarios
• The file format is being defined but will include
• aircraft numbers
• communication requirements - a/g, a/a - addressed
  and broadcast - in the test volumes
• The file will be made available to support
  assessment of technologies

13
Next steps

• Completion of the parameters for the set of test
  volumes
• calculation of communications requirements in
  large volumes
• Distribution of the file for technology
  assessment
• file planned to be completed by early-October