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