A. Air/Ground Communication Structure
(1)
ACARS Router
The function of the router is to:
-dispatch downlink messages from datalink users to the appropriate sub-network, depending on the message routing policy,
-direct uplink messages to the appropriate destination (datalink user).
(2)
ACARS Datalink Layer
The function of the datalink layer is to:
-interface the router with the available air/ground datalink network VHF3 or SATCOM as specified in ARINC 618 and ARINC 750 for the VHF Data Radio (VDR) interface,
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ATIMS - Air/Ground Communication Structure
Figure 001
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-report the status of the available datalink network to the ACARS network management layer,
-control the VHF3 mode of operation (Voice/Data).
(3)
ACARS Network Management Layer The function of the network management layer is to:
-manage and acquire parameters essential for ATSU router operation,
-give the crew the control on the air/ground datalink communication,
-indicate the status of the air/ground datalink communication,
-allow the crew to activate tests,
-manage the Human-Machine Interface (HMI) for the ACARS communication services (access to the printer, Multipurpose Control and Display Units (MCDUs) and generation of air /ground communication specific FWC alerts and warnings).
(4)
ACARS On-Board Router The function of the ACARS on-board router is to:
-transfer air/ground messages to and from remote AOC applications as specified in ARINC 619 . remote AOC applications <---> ground . remote AOC applications <---> hosted AOC applications
-route uplink air/ground messages to the appropriate Flight
Management and Guidance Computer (FMGC).
(5)
AOC Peripherals Interface Layer The function of the AOC peripherals interface layer is to interface the ACARS on-board router with the peripherals (ARINC 429 Williamsburg for file transfer and ARINC 429 broadcast for data access and delivery).
(6)
VDR/SDU Interface Layer The function of the VDR/SDU interface layer is to:
-
interface the ACARS datalink communication with the sub-network equipment VDR3 and SATCOM SDU (ARINC 429 Williamsburg for file transfer and ARINC 429 broadcast for data access and delivery),
-
interface the VDR with the SATCOM SDU.
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R **ON A/C 106-149, 151-156, 159-199, 201-299, 301-399, 401-499,
Post SB 46-1013 For A/C 151-156,201-209,
The structure of the air/ground communication services is composed as
follows:
(Ref. Fig. 001A)
A. Air/Ground Communication Structure
(1)
ACARS Router
The function of the router is to:
-dispatch downlink messages from datalink users to the appropriate sub-network, depending on the message routing policy,
-direct uplink messages to the appropriate destination (datalink user).
(2)
ACARS Datalink Layer
The function of the datalink layer is to:
-interface the router with the available air/ground datalink network VHF3 or SATCOM as specified in ARINC 618 and ARINC 750 for the VHF Data Radio (VDR) interface,
-report the status of the available datalink network to the ACARS network management layer,
-control the VHF3 mode of operation (Voice/Data).
(3)
ACARS Network Management Layer The function of the network management layer is to:
-manage and acquire parameters essential for ATSU router operation,
-give the crew the control on the air/ground datalink communication,
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