AOC/FOC Interface
for Data Comm
Production System
To: DCIT AOC WG
From: Data Comm Production Sub-Team
Date: 2/1/13
Federal Aviation
Administration
Agenda
• Recap for Production System (2016)
–
–
–
–
DCL Dispatch Message
Gate Request Message
ICAO 2012 FP
Web Access Subscriber Data Base
• Discussion Topics/Issues
– Gate Request Message Filtering
– Pilot Response/Dispatch Message
– 24-bit Aircraft Address
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
2
DCL Dispatch Message: Summary
• Content
– Contains content of DCL that is sent to pilot for initial and any revised DCL
– Includes a caveat that this is not an ATC clearance, and does NOT include
a beacon code
– For Initial DCL, whether Cleared as Filed, Initial UM79 or UM80, includes a
separate full route string even if this was not sent to pilot (e.g., for CAF and
Initial UM79 cases)
– Format same as for DTAP Systems Integration Description Document
(SIDD v1.1, Nov. 2012);
• Distribution/Timing
– Sent to AOC only when a DCL clearance uplink is sent to flight deck
• Initial DCL as response to request by flight deck via DM25
• Revised DCL upon controller approval of the revision
– Users have option to tailor Dispatch message preferences via Subscriber
Data Base (not required; default is all types to all users)
•
•
•
•
Copy of initial DCL only
Copy of initial DCL and revisions (as sent to pilot)
Copy of initial DCL and revisions (entire content)
None
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
3
DCL Dispatch Message Response: Summary
• Content
– Format same as for DTAP Systems Integration Description
Document (SIDD v1.1, Nov. 2012) except no gate
assignment (handled by separate Gate Request message)
– {Flight ID *A} { Sequence Number} {Tail Number}
{Departure time}
– Contains Departure time field from legacy PDC response
to minimize software impact, per SIDD
• Distribution/Timing
– Sent by AOC to FAA in response to DCL Dispatch
Message
– Expect within 2 min, similar to PDC and DTAP
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
4
Initial Departure Clearance : Gate ID and DCL Dispatch
messages
Tower
Controller
Data Comm
Flight Data
AOC/FOC
Automation
Avionics
Pilot
1. Flight Plan
2. Flight Data
Circa P-Time- 60 min
3. Flight Strip
Circa P-Time- 30 min
4. Clearance for approval
5. Approved Departure Clearance
Circa P-Time- 20 min
6. Session Start
7. Gate Request
Pilot will request
DCL
x minutes before
departure
8. Gate Request Response
9. Departure Clearance Request
10. Departure Clearance
13. DCL Dispatch (CC)
14. DCL Dispatch Ack
15. Departure Clearance Response
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
5
Gate Request Message: Summary
• Content
– Gate Request data exchange is designed to provide same
functionality as AOC provides in current response to a PDC
– Provide gate/surface location at sites that require it operationally;
initial implementation is gate ID
– Format in DTAP SIDD, v1.1
• Distribution/Timing
– Gate Request is now a separate message exchange between TDLS
and AOC
– Gate Request sent to AOC when controller/system first approves
DCL, e.g., similar to time when a PDC goes to AOC at approx. 2025 min prior to P-Time
• No explicit controller involvement in actual message to AOC
• One-time request message; any subsequent gate changes will be handled
procedurally
– Users have option to opt out of Gate Request via Subscriber Data
Base when not operationally required (Discussion topic)
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
6
Gate Request Message Response: Summary
• Content
– {Flight ID *A} { Sequence Number} {Tail Number} {
Airport Departure} {Gate Assignment}
• Gate Number, if known
• “G” if gate is unknown
– Format in DTAP SIDD, v1.1
• Distribution/Timing
– Sent by AOC to FAA in response to Gate Request
Message
– Expect response from AOC within 2 min, similar to
PDC response
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
7
ICAO 2012 FP Update: Coordination
1. Coordination with Users
Data Comm Implementation Team (DCIT), including members
participating in Data Comm Trials
Continue to address any feedback from users
2. Coordination within FAA
FAA ICAO 2012 FP Program Office
FAA beginning transition to ICAO 2012 FPL
Presented at ICAO Flight Plan Filers Telecon Nov. 7
3. Coordination with other ANSPs
Avoid unintended consequences; determine if any potential
overlaps for Fld10a or Fld 18 DAT/ usage
Plan to present at DLUF in Feb 2013
Circulate a notice to prevent duplicate usage of Field 18 codes
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
8
ICAO 2012 FP Codes for Data Comm: Summary
• ICAO 2012 Flight Plan is now operational in the
NAS
• Proposed Data Comm “codes” in Field 18/DAT
are a mechanism for user to notify FAA
automation to generate DCL or PDC for 2016
– Assumes FANS 1/A and FANS 1/A+ support
– ICAO FP codes take precedence over any other user
preference mechanism
• Proposed codes include an optional “Fallback”
Hierarchy if DCL service is not available
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
9
Fld 18/DAT – Proposed Codes for Data Comm
#
User
Preferenc
e
Data Comm Capability
Description
ICAO
2012 Fld
10a
1a
Voice only*
Not equipped for ACARS or
FANS; gets voice only
E3J4J7
1b
Voice only*
Equipped for ACARS and
FANS but wants voice only
E3J4J7
2a
PDC only*
Not ACARS equipped but
gets PDC via manual means
Z
Data
Comm
Fld 18
DAT/
Comments
•
Fld 10a order is any order and world-wide
•
Z is required to get to DAT/
•
No spaces in actual DAT/ field
Default if user is not getting PDC or DCL.
Field 10a may be optional.
1VOICE
(opt)
Optional. Only needed if users want to
negate stored default and use voice only.
1PDC
Some aircraft are non-ACARS equipped, and
10a is physical equipage. Still get PDC via
other means. Optional if currently getting PDC.
2b
PDC only*
Equipped only for ACARS
PDC
E3
Z
1PDC
Optional if currently getting PDC.
2c
PDC only*
Equipped for ACARS PDC
and FANS but wants PDC
only
E3J4Jx
Z
1PDC
Equipped for ACARS PDC and FANS 1/A or
1/A+, and possibly other capabilities (Jx).
Identifies US domestic preference for PDC.
Optional if currently getting PDC.
* No ICAO FP change required if user currently gets PDC and does not
want DCL. Current PDC designation will be the default.
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
10
Fld 18/DAT – Proposed Codes for Data Comm - cont’d
#
User
Preferenc
e
Data Comm Capability
Description
ICAO
2012 Fld
10a
Data
Comm
Fld 18
DAT/
Comments
•
Fld 10a order is any order and world-wide
•
Z is required to get to DAT/
•
No spaces in actual DAT/ field
3a
FANS1/A
DCL only
Equipped for ACARS/PDC
and FANS but wants FANS
1/A only
E3J4Jx
Z
1FANS
Identifies US domestic preference for
FANS 1/A DCL.
3b
FANS 1/A+
DCL only
Equipped for ACARS/PDC
and FANS but wants FANS
1/A+ only
E3J4Jx
Z
1FANSP
Identifies US domestic preference for
FANS 1/A+ DCL.
4a
FANS 1/A
DCL/PDC
Equipped for ACARS PDC
and FANS 1/A, with
primary/secondary
preferences
E3J4Jx
Z
1FANS
2PDC
Code number shows priority preference, e.g.,
FANS 1/A DCL is primary preference; PDC is
secondary that will be used if primary is
unavailable and feasible.
4b
FANS 1/A+
DCL/PDC
Equipped for ACARS PDC
and FANS 1/A+, with
primary/secondary
preferences
E3J4Jx
Z
1FANSP
2PDC
Code number shows priority preference, e.g.,
FANS 1/A+ DCL is primary preference; PDC is
secondary that will be used if primary is
unavailable and feasible.
5
ATN/FANS
1/A+ DCL/
PDC
Equipped for ATN DCL,
FANS 1/A+ DCL, and PDC;
preference is ATN.
E3J1J4Jx
Z
1ATNB
2FANSP
3PDC
Code shows preference, e.g, ATN B2 (ATNB)
DCL, then FANS 1/A+ DCL, then PDC.
This is one example only. ATN codes are TBD
and will need to be worked.
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
11
ICAO 2012 FP Codes for Data Comm: Summary –
cont’d
• “Fallback” Hierarchy and Concepts
– Open question on notification of service unavailability to
AOCs and flight deck
• At Sept DCIT, WG deferred considering this for inclusion in
DTAP and for working Fallback questions to Spring 2013
– Production system currently plans to implement hierarchy
as follows
• Fallback only occurs if AOC/User has designated PDC as the
secondary clearance type preference
• If flight has been “processed” as DCL, even if not picked up by
pilot, no PDC will be sent, e.g., if past normal “drop” time, flights
will go to voice if DCL service becomes unavailable
• New flights or those earlier than “drop” time, will get PDCs if
user has indicated this via ICAO flight plan codes or other user
preference mechanism
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
12
Subscriber Database (SDB)
• SDB is already in operation in TDLS
– Historically, access was provided to IFCET (TDLS Team at OKC)
only
• CSPs emailed updates to IFCET
• IFCET manually updated the SDB via direct access
– SDB currently contains, at a minimum, the destination ADNS address
for PDCs
• Provides a method to:
– Determine where to send PDCs and DCL Dispatch Messages
– Determine whether to send Gate Request Messages
– Accommodate user preferences, e.g., specify the primary and
secondary clearance preference type or tailor Dispatch messages
– Allow ATO Safety to declare an entity ineligible to receive a clearance
(Lock out)
– Allow ATO Safety to specify the sites where an airline can receive a
PDC (and DCL, if subscriber sites follow the same rules as PDC sites)
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
13
Web Access to the SDB
•
Web Access provides a new, secure method for accessing the SDB
– AOC/CSP can directly manipulate their subscriber data
– Portal access is limited to their data
– AOC/CSP may not need to access the SDB after initial set up
•
Concept of Operation
– CSP/AOC logs in to Web Access SDB
– CSP/AOC creates/modifies a record to specify clearance type(s),
Dispatch message options, Gate Request preference, and CSP/AOC
address
– CSP/AOC only accesses SDB when changes are required
•
The enhanced SDB will include various flight specific and AOC/user data
elements
– Flight id (tail number, call sign, Airline ID, etc.)
– ADNS address for PDCs and DCL Dispatch messages
– Primary and secondary clearance preference types (PDC, DCL)
– Other User Preferences, e.g., type of DCL Dispatch/Courtesy Copy(CC)
airline will receive (initial, revision, all), Gate Request message
– Other PDC and CPDLC management information, as applicable
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
14
DISCUSSION TOPICS
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
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Revised Departure Clearance : DCL Dispatch message
Tower
Controller
Data Comm
Flight Data
AOC/FOC
Automation
Avionics
May come from FAA
automation or user
1. Revised Flight Plan
Pilot
Pilot has already picked
up initial DCL.
2. Rev Flight Data
3. Rev Flight Strip (opt)
4. Revised Clearance for approval
5. Approved Departure Clearance
6. Revised Departure Clearance
7.a. Rev DCL Dispatch
7.b. DCL CC Ack
8. Departure Clearance Response
Send DCL CC to AOC
in parallel to step 6
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
16
Discussion Topic: Gate Request Message Filtering
•
Previous DCIT proposed that Gate Request message will be sent
only to those users who currently supply gate in PDC response
- Specific mechanism for determining which airports and which users require
the Gate Request message was TBD
- Minimize impact to AOCs and ATC operations, while providing desired data
element
• Production system requirements need to be finalized
• Current planned implementation
-
Ground system will send Gate Request Message to all AOCs
Users opt out via Web-based access to Subscriber Data Base,
which is same mechanism as for providing ADNS addresses
• SDB Web Access allows other user default preferences
• If any issues with ATC for specific airport or users, adjust accordingly
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
17
Discussion Topic: Pilot Response/DCL Dispatch
Message
• Problem:
– Previous DCIT discussion over having pilot response (WILCO, UNABLE,
STANDBY) provided to AOC in DCL Dispatch Message
– Currently, ground system sends Dispatch Message to AOC when initial or
revised DCL is sent to cockpit, without waiting for any pilot response
• Discussion:
1.
2.
3.
4.
Determine if two messages or one? Would AOC want one message
when sent and an update when pilot response received OR wait until
response is received (could be 5 min) and then send everything in one?
Anything different for STANDBY or UNABLE response?
Anything different for CAF and non-route revisions?
Consider as a user “preference” via Production Web-Access Subscriber
Data Base?
• Production SDB could provide flexibility for AOCs to tailor getting pilot response in
Dispatch Message
• SDB already to be used for user preferred ADNS addresses
• SDB optional for delivery type, e.g., PDC or DCL
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
18
Discussion Topic – 24-bit Aircraft Address
• DTAP Problem:
– DTAP PTR#1: The ICAO 24 bit aircraft identifier is not being correlated
correctly. This results in the aircraft being rejected during logon.
– At least one aircraft type sends the ICAO 24 bits in reversed order, and
existing logic uses it as a criterion for flight plan correlation
• Short Term Solution:
– DTAP: Remove 24-bit address from DTAP flight plan correlation logic.
– Production System: Ensure 24-bit address is not used by logon (ERAM) or
DCL (TDLS)
• Discussion:
– Need longer term solution for S1P2 En Route services
– Solution would have to work with LINK also. Global impact, with other
possible impacts, including ADS-B
– Next Steps? Defer to FAA ATN B2/FANS-1/A Designs.
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
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QUESTIONS?
DCP SE AOC Sub-team
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Federal Aviation
Administration
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Back Up
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Federal Aviation
Administration
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DCL Dispatch Message: Initial
{field values in brackets. Field identifiers marked with “#” from table below, notes marked with *}
^AQU {IATA address TO }
.{IATA address FROM} {DDHHMM}
^BCCI
{ Sequence Number} DCL DISPATCH MESSAGE – NOT AN ATC CLEARANCE
{Flight ID *A} {field #1}
{Equipment *B} P{Departure time *C}
{Computer Identifier *D} {field 13}
{Route Information *E}
{Route Information *E}
{Route Information *E}
{Free Text *F}
{Free Text *F}
{Free Text *F}
{Free Text *F}
{Free Text *F}
{Free Text *F}
{Free Text Additional *G}
{Free Text Additional *G}
{Free Text Additional *G}
^C
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
22
DCL Dispatch Message: Revised
{field values in brackets. Field identifiers marked with “#” from table below}
^AQU {IATA address TO }
.{IATA address FROM} {DDHHMM}
^BCCR
{ Sequence Number} DCL DISPATCH MESSAGE – NOT AN ATC CLEARANCE
{Flight ID *A} {Field 1} {REVISED *H *H}
{Equipment *B} P{Departure time *C}
{Computer Identifier *D} [REVISED EXPALT] {field #13}
{Route Information *E}
{Route Information *E}
{Route Information *E}
{Free Text *F}
{Free Text *F}
{Free Text *F}
{Free Text *F}
{Free Text *F}
{Free Text *F}
{Free Text Additional *G}
{Free Text Additional *G}
{Free Text Additional *G}
^C
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
23
DCL Dispatch Message Response
{field values in brackets. Field identifiers marked with “#” from table below}
^AQU {IATA address TO }
.{IATA address FROM} {DDHHMM}
^BCCA
{Flight ID *A} { Sequence Number} {Tail Number} {Departure time} 1
^C
Notes:
1. Production message format for response does not include Gate Assignment,
which is provided via Gate Request message response
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
24
Gate Request Message
{field values in brackets. Field identifiers marked with “#” from table below}
^AQU {IATA address TO }
. IATA address FROM} {DDHHMM}
^BGRM
{ Sequence Number}
{Flight ID } {Aircraft Reg #/Tail Number}{Airport Departure}
^C
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
25
Gate Request Message Response
{field values in brackets. Field identifiers marked with “#” from table below}
^AQU {IATA address TO }
.{IATA address FROM} {DDHHMM}
^BGIR
{Flight ID *A} { Sequence Number} {Tail Number} { Airport Departure} {Gate Assignment}
^C
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
26
Data Comm and ICAO FP: Summary
• Implementation Approach
– Data Comm Trials system will use “FRC DCL” in
Field 18/RMK field of current and 2012 ICAO Flight
Plan
– Data Comm Production system (IOC 2016) will use
ICAO 2012 FPL
• Field 10a (Equipage) used to identify aircraft capabilities
• Field 18 (Other Information) DAT/Codes used to identify
flights getting DCL or PDC
• Field 18 DAT/ Codes will include a primary/secondary
hierarchy
– “1”xxx designates preferred departure clearance delivery
mechanism
– “2”xxx designates “back up” delivery mechanism
• ICAO FPL preferences take priority over any other sources
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
27
DCL Service Fallback Concept: Recap
• If CPDLC service for DCL is not available,
FAA automation will “fall back” to PDC
– AOC/User must tell FAA they want this to occur;
system-wide, not per airport
• Can be done in ICAO FP preferences in Field 18/DAT
• An additional option is for AOC/user to provide this fallback
preference via Web Access portal
– Fallback preferences can be stored in the SDB in
TDLS automation and used when applicable
– Fallback only occurs if AOC/User has designated
PDC as the secondary clearance type preference
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
28
Web Access SDB and ICAO FP
• ICAO Flight Plan Content
– Optionally specifies the clearance type (DCL/PDC/Both)
– Does not provide the address for the Courtesy Copies, Gate ID Request
message or a PDC. This information is needed in the SDB but not
available in the flight plan
• Hierarchy for Information from ICAO FP and SDB
– ICAO FP will take precedence over Web Access. ICAO FP is checked for
Clearance Type first
– IF Clearance preference is available in FP
• Types of Courtesy Copies are retrieved from the SDB
• ADNS address for CC is retrieved from the SDB
– No clearance preference available
• Clearance preference is retrieved from the SDB
• Types of Courtesy Copies are retrieved from the SDB
• ADNS address for CC is retrieved from the SDB
– Voice clearance is issued if the clearance type (DCL, PDC) is NOT
specified in the ICAO flight plan or SDB
DCP SE AOC Sub-team
1 Feb 2013
Federal Aviation
Administration
29