FRS Technology Assessment Step 2 – Common Traffic Scenarios

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

6. 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. TV3.3 TV3.1 TV3.2 200NM 100NM Sets of test volumes 55NM FL450 FL245 Ground 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