This function is a gate-keeper of sorts.  If a message passes through this gate, it means that user is allowed to conduct that aircraft data communication.

Embedded Elements
Element Detail Notes
Port 2.5.1.5.0.1 User Port

1.0

Port 2.5.1.5.0.3 User Validation Port

1.0

Port 2.5.1.5.0.2 Message Port

1.0

2.5.1.1 CPDC Data Store
Type:  DataStoreNode   
Status:  Proposed.  Version 1.0.  Phase 1.0.
Package: 2.0 Ground Data Processing (GDP)     Keywords:  
Detail:  Created on 11/24/2006.  Last modified on.11/24/2006.
GUID:  {D4714C14-F791-4c8b-A7C2-E27F0B20E164}

This datastore includes the following information:
- network protocol capabilities (e.g. ATN, FANS, etc) - local copy after querying MAAI datastore upon CPDC dialog start.
- Eligibility information
- Transaction state information
- Permitted User list information (User ID, User Address, User Capabilities)

Embedded Elements
Element Detail Notes
Port 2.5.1.1.0.1 CPDC Datastore Port

1.0

2.5.1.7 Verify User Eligibility
Type:  Object   
Status:  Proposed.  Version 1.0.  Phase 1.0.
Package: 2.0 Ground Data Processing (GDP)     Keywords:  
Detail:  Created on 11/24/2006.  Last modified on.11/24/2006.
GUID:  {D55FFE16-D1C5-4dcc-A09A-03927A945FD6}

Notes:
- Communications with FDP to determine if user is eligible.

Embedded Elements
Element Detail Notes
Port 2.5.1.7.0.3 Request Port

1.0

Port 2.5.1.7.0.1 System Resource Port

1.0

Port 2.5.1.7.0.2 Datastore Port

1.0

2.5.1.3 Process ATN Communications
Type:  Object   
Status:  Proposed.  Version 1.0.  Phase 1.0.
Package: 2.0 Ground Data Processing (GDP)     Keywords:  
Detail:  Created on 11/24/2006.  Last modified on.11/24/2006.
GUID:  {FDDF67ED-8D3C-475d-850E-FE97EA87DF3B}

The Process ATN Communications functions formats/encapsulate CPDC messages within ATN message structure and implements/manages any ATN specific rules processing.  This function manages the ground side of the ATN connection.  This function supports a single connection per aircraft, but supports multiple aircraft.

Embedded Elements
Element Detail Notes
Port 2.5.1.3.0.2 CPDC Port

1.0

Port 2.5.1.3.0.1 ATN Port

1.0

2.5.1.8 Manage Data Authority
Type:  Object   
Status:  Proposed.  Version 1.0.  Phase 1.0.
Package: 2.0 Ground Data Processing (GDP)     Keywords:  
Detail:  Created on 11/24/2006.  Last modified on.11/28/2006.
GUID:  {99FF2CA2-126E-45b6-9447-2DB29F467529}

This function subscribes to the FDP flight object to get data authority information.  This function is not the 'truth' holder, but communicates with the FDP as needed to get data authority status.  It also updates the remote MAAI function so that that function can assign the right CPDC application address during aircraft logon.
　
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本文鏈接地址：Functional Architecture for the Data Communication System(69)