Next Generation Air/Ground Communications (NEXCOM)
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Transcript of Next Generation Air/Ground Communications (NEXCOM)
Next Generation Air/Ground CommunicationsNext Generation Air/Ground Communications
(NEXCOM)(NEXCOM)Presented to
ATN 2002London, England
25 September 2002
James H. WilliamsCommunications Integrated Product Team Lead
Federal Aviation Administration
2
Overview
• NEXCOM Acquisition Program Update
– Program Objectives
– Program Elements
– Transition to NEXCOM
• NEXCOM Voice Features
– Basic Voice
– Enhanced Voice
• NEXCOM Data Link Transition
3
NEXCOM Objectives
National Airspace System Infrastructure Sustainment
National Airspace System Infrastructure Modernization
1422 RTRs
61 AFSSs, 14 FSSs
793 RCAGs
1854 RCOs
175 TRACONs
346 Towers720 BUECs
4
NEXCOM Acquisition Program Elements
System Demo ProgramAvionics
Multimode Digital Radio
Analog & digital modes in one radio Digital capability
Ground SystemVHF T/R
RadioInterface
Unit
GroundNetworkInterface
Analog & digital in single cockpit radio
Show NEXCOM system architecture and commercial
avionics viability
5
NEXCOM Multimode Digital Radio
6
NEXCOM Ground System Segment
Voice Switch
Voice2V2D ConfigurationGNI
DLAP
ATN Router
Data
Data
CombinedVoice & Data
Avionics
RCAG
VHF Tx/Rx M/S
RadioInterface
UnitUHF Tx/RxM/S
BUEC
VHF Tx/Rx
UHFTx/Rx
RadioInterface
Unit
CMU
Voice
Data
7
NEXCOM Avionics
FAA/Manufacturer Agreements
Airlines Airlines
GeneralAviation
BusinessAviation
8
NEXCOM System Demonstration Program
Objectives
– Oct 02: VDL Mode 3 Technology viability
– Oct 03: NEXCOM Architecture feasibility
– Oct 04: Operational suitability
9
National Airspace SystemTransition to NEXCOM
Dem/ValDem/Val
• Analog Voice, 25 KHz
• Initial Datalink (VDL-2)
• Full Operational Evaluation& Exercise of Digital Voiceand Datalink (VDL-3)
Next 5 years
VDL-2 Datalink
AnalogVoice
5-10 years
• Maintain Terminal Analog Voice
• Implement VDL-3Digital Voice
• Expand Datalink VDL-2Applications
Enroute High Airspace
National Airspace
RCAGARTCC
VDL-3Link
10-15 years
• Expand EnrouteDigital Voice (VDL-3)
• Initiate TerminalDigital Voice (VDL-3)
• Increase Datalink Capacity& Capability (VDL-2 & VDL-3)
TerminalAirspace
15-20 years
• Expand Digital Voice (VDL-3) to all domains
• Expand Datalink Capacityin all domainsand all applications(VDL-2 & VDL-3)
AFSS
10
NEXCOMKey Basic Voice Features
• Anti-Blocking
– Resolution for stepped-on transmissions
• Controller Override
– Controller can preempt ongoing aircraft transmission
for urgent control message
– Resolution for aircraft “stuck mike”
11
NEXCOMKey Enhanced Voice Features
• Enhanced Voice features require a context
management application to enable the system to
identify specific aircraft
• Next Frequency– Uplink of next frequency for pilot concurrence/action
– Coupled with CPDLC transfer of communications
• Urgent Downlink Request– Cockpit-generated data message to controller that pilot has
an urgent transmission to make
12
NEXCOMData Link Transition
• Increased use of data link is essential to increasing the capacity of the NAS
• CPDLC is FAA’s application for air traffic control messages
• FAA views VDL Mode 2 and VDL Mode 3 as complementary, not competing technologies
• CPDLC Build 1 and 1a initially will be fielded on VDL-2
– Only viable technology in required time (2005 NAS-wide)
– Stepping stone for data link use in air traffic control
13
NEXCOMData Link Transition
• Growth in CPDLC Use– Increases system and user benefits but
– Also drives up FAA costs
• CPDLC on VDL-3 means– Predictable costs to FAA
– No added service costs to users
• Continued availability of CPDLC on VDL-2– Independence of networks a safety backup benefit
– FAA could not continue to fund message costs
14
Discussion
15
Spectrum Depletion
The FAA predicts VHF Spectrum Saturation in the National Airspace System by 2009
16
Frequency Congestion Cost and Efficiency Implications
5
10
15
20
25
1998 2003 2008 2013 2018 2023 2028
Year
Cir
cu
its
(1
00
0s
)
Increasing Cost and Difficulty of Provisioning New Circuits
Unsatisfied DemandReduces NAS Efficiency
Historically, circuit growth hasbeen 4% per year.
Increasing cost/difficulty of placing new circuits reduces growth rate.
Reduced growth rate implies a less-efficient NAS.
Growth in A/G Circuit Demand
# Deployed A/G Circuits
23 spectrum recovery initiatives (ASR)
17
NEXCOM System Architecture
Voice Switch
Voice2V2D ConfigurationGNI
DLAP
ATN Router
Data
Data
CombinedVoice & Data
Avionics
RCAG
VHF Tx/Rx M/S
RadioInterface
UnitUHF Tx/RxM/S
BUEC
VHF Tx/Rx
UHFTx/Rx
RadioInterface
Unit
CMU
Voice
Data
18
System Demo IEquipment• Air: MITRE Prototype• Ground:
• ‘99 Configuration• ITT MDR with FAA
Prototype RIU
Oct 02 Oct 03 Oct 04
Operational System Demo
SystemDemo I
Objective: Show VDL-3
technology is viable
Demonstrates:• Coverage• Voice Quality• Voice
Override• Integrated
Voice and Data
Objective:Show NEXCOM
system architecture viability
Demonstrates:• Sector
Handoffs• ATN Network
Interoperability• System
Management• Commercial
infusion• Technology
maturation
Objective:Show
commercial avionics certifiability and operational suitability
Demonstrates:• Operational
digital voice• Commercial
avionics• Human factors
SystemDemo II
System Demo IIEquipment• Air:
• MITRE & FAA Tech Center Prototypes• Vendor Avionics (prototype)
• Ground: • ITT MDR with FAA Prototype
RIU• DoD Participation• Air Carrier Participation
Operational System Demo
Equipment• Air: Vendor Avionics• Ground:
• ITT MDR with FAA Prototype RIU & GNI
• DoD Participation• Air Carrier Participation
NEXCOMSystem Demonstration Program
19
NEXCOM Schedule
2001 2003 2004 200920052002 2006 2007 2008
System DemoProgram
10/03SystemDemo II
10/04OperationalDemo
10/02SystemDemo I
MultimodeDigitalRadio
7/01Contract Award
MDR deployment
10/02In-ServiceDecision
RuleMaking 1/04
NPRM1/02
RTCAPrinciples of
Operation
6/03Begin
Formal InternalCoordination
6/04Initiate Final Rule
6/05Rule Published
8/03Notice ofAvailability TSO
9/03AEECApprovedChar.
Avionics 10/02Draft
CharacteristicsComplete
8/04CertifiedAircraft
10/01MOPS
12/09Operational
6/05-12/09 Aircraft equip
GroundSystem 10/02
RPDEContract Award
10/01Sys Reqs
Doc
1/05Full Scale Dev Contract Award
07-12 ImplementationValidation & Inter-Operability Tests
with Airborne Avionics4/02SIR
Release
10/07Keysite
5/02FAT
8/03Notice ofAvailability TSO
9/03AEECApprvdChar.
12/01GIAs
5/03Begin
Deployment