1. Communications Operating Concept & Requirements (COCR)
ICAO ACP WG-T
Montreal
2- 5 October 2007
Gregg Anderson - FAA
Danny van Roosbroek - EUROCONTROL
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2. Outline Purpose of the COCR Development of Version 2.0
Common Evaluation Scenarios
Conclusions
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3. Aircraft Traffic  Communications
A Day in 2025
More than double today’s traffic
Advanced ATC concept
Data is Primary …
T -Throughput
C - Continuity
I - Integrity
A - Availability
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4. COCR development Joint EUROCONTROL/FAA activity through common team
Based on potential operational scenarios available at the time in medium and long term
Phase 1 – to 2020
Phase 2 – 2020+
Paradigm shift between Phases when data communications becomes the ‘normal’ means of communication
Future radio system is aimed at supporting the Phase 2 requirements
Primarily for data communication
COCR carried out an analysis to support these requirements in various phases of flight
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5. Overview of the COCR (1/3)
Captures the operational requirements for Phase 1 (from now to 2020) and Phase 2 (beyond 2020)
Concept in Phase 1 is drawn largely from available material at the time i.e. the EUROCONTROL ATM concept document for & 2020 and beyond
Concepts in Phase 2 are based on more extensive use of Phase 1 services and more advanced operations (e.g. 4D Trajectory Management)
Autonomous operations take place in some parts of the airspace
Based on postulated ATS operational concept using existing documentation and extending it into the future
Broadly in-line with SESAR and NextGen concepts of operation
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6. Overview of the COCR (2/3)
From the operational concepts, information flows have been identified in representative test volumes of airspace i.e. ‘positions/sectors’ in Airport, TMA, En Route, & Oceanic.
Airport positions & Radar sectors in Phase 1 similar to today
Radar sectors larger in Phase 2, perhaps 2-3x. Airport positions pretty much the same as Phase 1
Covers all ATS and AOC air-to-ground and air-to-air voice and data communication
Includes ADS-B and AOC applications
Includes micro-jets & UAV’s (only ATC control element)
Does not include Air Marshall, UAV Command & Control, SWIM, or spacecraft communications
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7. Overview of the COCR (3/3)
Identifies all communication requirements based on safety and security analysis
Availability, continuity, reliability and latency
Requirements are technology independent
Communication requirements are then used in a queuing model for communication loading (b/s per service volume)
Aircraft numbers are grown over time using EUROCONTROL SAAM data in ECAC – MLM in US
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8. Final COCR Version 2.0
Final version of the COCR completed in March 07 –
Presented at ACP/1
Responded to comments received on COCR Version 1.0 and clarify areas of ambiguity
Ensured satisfactory agreement among stakeholders with some of the more stringent services and the surrounding concept of their use
Captured and defined missing services
Further defined services to ensure a more complete understanding of their operational use
Categorised services into similar safety/operation groups
Assessed the safety and security requirements associated with each group
Assessed the associated performance requirements impact
Used to support the technology assessment
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9. Requirements - capacity
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10. Requirements – Other QoS
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11. Requirements –Latency
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12. COCR TMA Sectors
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13. COCR En route Sector
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14. Evaluation Scenarios
Provide a family of generic operational environments based on an extrapolation of the Phase 2 COCR requirements so each expresses the same requirement in different ways
Reinterpretation of COCR requirements expressed in a variety of ways that can be better used during the technology assessment work
This set of scenarios were used in the technology assessment so as to compare results and identify the technologies in an equitable way
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15. Test Volumes
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16. The airport Test Volumes have been defined as:
Airport surface
The airport Test Volumes have been defined as:
TV1.1 Airport Zone: 10NM diameter Cylinder including Runway and Tower operations but excludes surface.
TV1.2 Airport Surface: 5NM diameter circle including Clearance/Ramp and Ground components. 5 NM was representative of a large European airport
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17. Core Europe Concept of Core Regional Test Volumes was introduced:
TV have been redefined as Core Regional TVs
They are representative of a global Large Area Volume (LAV) such as ECAC or NAS.
Designed to formulate a generic large area rather than a specific case
Characterise a large terrestrial coverage area, or large terrestrial area inclusive of surrounding oceanic airspace regions
Core Regional Test Volumes provide a scenario for either TMA or ENR airspace.
Core Regional Test Volume designed for assessment of space based technologies.
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18. Aircraft Traffic Traffic Growth Predicting tool used
Ref.
Volume Type
PIAC
Traffic Growth Predicting tool used
Busy hour in busy day in 2025 (Phase 2 – COCR)
Peak aircraft count chosen for each Test Volume
Aircraft traffic assumed to be uniformly distributed within the test volume.
TV1.1
Airport Zone – 10NM diameter 26
TV1.2
Airport Surface – 5NM diameter
264
TV2.1
TMA Small – 49 x 49 NM 44
TV2.2
TMA Large – 75 x 75 NM 53
TV3.1
ENR Small – 55 x 55 NM 45
TV3.2
ENR Medium – 100 x 100 NM 62
TV3.3
ENR Large – 200 x 200 NM
204
TV3.4
ENR Super Large 400 x 400 NM
522
1733
TV4.1
Core Regional FL050 – FL245 [TMA]
TV4.2
Core Regional FL245 – FL450 [ENR]
2908
1753
TV4.3
Core Reg + Oceanic FL050 – FL245 [TMA]
TV4.4
Core Reg + Oceanic FL245 – FL450 [ENR]
3415
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19. TMA small
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20. TMA large
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21. En route large
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22. En route super large
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23. The COCR has been the basis for evaluating technologies
Conclusions
The COCR has been the basis for evaluating technologies
Evaluation Scenarios have been used to assess technologies against the requirements in an equitable way
The choice of the appropriate scenario was dependent on the technology
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24. Thank You …
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