FRS Technology Assessment Step 2 – Common Traffic Scenarios
Phil Platt, Nikos Fistas
AGCFG 3/WGC1118-19 September 2006, Brussels
European Organisation for the Safety of Air Navigation
Content
Communication requirements Need for common set of scenarios Definition of test volumes Characteristics of the scenarios Application of the scenarios Next steps
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
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
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
10132FL245 – FL45055NM x 55NM3D rectangleENR
76915000ft – FL24549NM x 49NM3D rectangleTMA
260 – 5000ft10NM diameterCylinderAirport
Volume (nm3)Height RangeDimensionsShapeService Volume
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
Sets of test volumes
5000ft
Ground
TV2.1 TV2.2
Ground5000ft
FL245
49NM 75NM
10NM
Airport
TMA
FL245
FL450
TV3.1 TV3.2 TV3.3
55NM100NM
200NM
Ground
ENR
ECAC test volume
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
Year PIAC
2015 2259
2020 2575
2025 2800
Air/Air Test Volume
200 NM
Test Volume: Air-AirCapacity determined byCOCR according to type ofairspace.
Test Volume: Air-GroundCapacity determined bynumber of aircraft inScenario
60 nm
200 NM
COCR defines 3 ranges for a/a broadcast - 5NM, 60NM and 200NM
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
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
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