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CPDLC Overview

ATC Data Link News
by

Craig Roberts

on 2 July 2016

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Transcript of CPDLC Overview

CPDLC
< Controller
< Pilot
< Data
< Link
< Communications
LOGON
LOGON TO
FLT NO
TAIL NO
< ATC INDEX
What >
When >
How >
Why >
DATA LINK
SEND >
READY
SESAR
The final episode of M.A.S.H. airs to 125 million viewers.
O.J. Simpson acquitted of murder.
Dolly the sheep cloned.
Air France 4590 (Concorde) crashes after takeoff in Paris.
The Lord of The Rings wins 11 Oscars.
European LINK2000+ CPDLC (ATN) services begin.
Final European ANSPs implement SC214 systems.
RTCA SC214/ EUROCAE WG78 commence work on new ATN standards.
SC214/WG78 Standards published.
"Convergence" crowned the new FANS/ATN buzz word.
Committee considers proposal to decommission FANS-1/A systems.
New government blames the economic situation on the previous administration.
FANS-1/A
ATN
The "Great Divergence Period" begins...
"CPDLC allows the exchange of text-based messages between suitably equipped Air Traffic Control (ATC) ground systems and cockpit displays".
2030
2013
2007
2004
2000
1997
1995
1983
KLAX - YSSY, June 1995
FANS-1/A Certification Flight
Initial need - Oceanic Communications
Most regional ANSPs employed a third-party HF radio operator, which meant that each transaction could take several minutes, and...
As a result, oceanic separation standards were...
DCPC via CPDLC allowed for the introduction of 50NM/50NM separation standards.
ATC communications with
Very Large!
However, unlike phone texts,
most CPDLC messages
- are pre-defined,
- selected from a menu,
- and just require a...
[
value
]

Each CPDLC message can consist of up to
message
5
individual
elements
Controller Menu
E.G.
Each message element is assigned...
- A unique message number
- A response attribute
- A Message ID Number (MIN)
CLIMB TO FL370
UM20 W/U 17 [370]
WILCO
DM0 N 33
17
UM20
W/U
17
Used by the receiving system to decode message text.
Defines the type of response required, if any.
The next number in the initiating system's ID sequence (0-63).
Active CPDLC
Logged-on and connected,
connection inactive
CPDLC requires the aircraft to logon to the ground system.
Subsequent transfers are performed automatically by the ground systems.
Finally...
atc data link news
More information:
Questions?
The first logon is performed manually by the pilot.
WILCO
UNABLE
ROGER
AFFIRM
NEGATIVE
NE
YES
NO
Example of
5
selected message elements, including free text.
ATC system ICAO code
Uplink
Downlink
Up to 15 minutes
Until CPDLC was developed,
HF Radio was the only means of
oceanic aircraft.
controllers did not have direct communications with aircraft under their control.
Craig Roberts
10 FEB 2012
FANS-1/A System Network - ACARS
YDDD
WBFC
Current Data Authority (CDA)
Next Data Authority (NDA)
Thank You.
NextGen
Airbus FANS-A certified over ACARS.
ICAO - FANS Special Commitee defines ATN, CPDLC, ADS-C.
Boeing FANS-1 certified over ACARS.
CPDLC services commence in the South Pacific Region.
FANS-1/A
ATN
The "Great Convergence Period" begins...
Timeline
1983 - 2030
250NM
The What >
The When >
The Why >
The How >
A single message containing multiple elements uses the highest priority overall attribute of all the elements.
NE
R
W/U
1
2
3
W/U
ATC Data Link News: http://members.optusnet.com.au/~cjr/introduction.htm
}
Direct Controller Pilot Communications
DCPC
Up to 15 minutes
50NM
50NM
50NM
Connection terminated
Active CPDLC
YDDD
WBFC
Full transcript