Title: AIDC / Provision of the Called ICAO Facility Designation when 
Info-transfer-request is invoked outside a dialogue

PDR Reference: 97060021

Originator Reference: Logica/DF/AIDC/005

SARPs Document Reference: AIDC SARPs ICAO, Version 1.1, section 
3.2.3.8.1

Status: 	ACCEPTED -> 	PROPOSED	04/09/97
			 ->	RESOLVED	17/10/97

PDR Revision Date: 17/10/97

PDR Submission Date: 27/06/97

Submitting State/Organization: 

Submitting Author Name: Fieldhouse, Dirk

Submitting Author E-mail Address: fieldhouse@logica.com

Submitting Author Supplemental Contact Information: 
Logica UK Limited
75 Hampstead Road
London NW1 2PL
UK
+44 (171) 637 9111

SARPs Date: ICAO Version 1.1 (ATNP/WGW1), March 1997

SARPs Language: english

Summary of Defect: When Info-transfer-request is invoked outside a 
dialogue, the Called ICAO Facility Designation must be provided. 
Otherwise no association can be started!

It could also be provided when the flight which is the subject of the 
information is not that for which the current dialogue was 
established, since such an Info-transfer should result in the creation 
of an additional dialogue; however, this appears to be a requirement 
on the AIDC-user (ie, it's up to the user application to create a new 
AE-invocation, and hence a new dialogue, for a new flight, and to use 
the same flight ID for each dialogue). The service could be clearer on 
this.

Assigned SME: Sub-Volume 3 SME

Proposed SARPs amendment :

Add two lines to Table 3.2.3-14 and two more paragraphs to explain 
these lines, renumbering the following paragraphs. At the same time, 
revise the proposed wording to the new Note in this clause to relect 
that Notification need not be the first regime and correct the 
numbering of the Notes (the ADSP material may need to be changed in 
line with this change), as follows:

a. amend Notes to read as follows:
"3.2.3.8.1 Info-transfer service
   Note 1.- The Info-transfer service permits an ATSU1 to transmit 
general executive data, surveillance data, general free text data, or 
emergency free text data, or to point-out a flight to an ATSU2.
   Note 2.- The Info-transfer service may be invoked by the C-ATSU 
even when no regime has been established."

b. insert a coma after "possible" in clause 3.2.3.8.1.1.2.

c. amend Table 3.2.3-14 as follows:

!------------------------------------!--------!-------! 
! Parameter Name                     !   Req  !  Ind  ! 
!------------------------------------!----------------! 
! Called ICAO Facility Designation   !    C   !       ! 
! Calling ICAO Facility Designation  !        !   C   ! 
! Information                        !    M   !  M(=) ! 
! Message Number                     !    M   !  M(=) ! 
!------------------------------------!----------------!

d. add the following clauses:
"3.2.3.8.1.4  Called ICAO Facility Designation
3.2.3.8.1.4.1  The Called ICAO Facility Designation shall be supplied, 
as specified in 3.2.3.1.1, only when the Info-transfer request 
primitive is invoked and no regime has yet been established by the 
AIDC-user.
3.2.3.8.1.5  Calling ICAO Facility Designation
3.2.3.8.1.5.1  The Calling ICAO Facility Designation shall be 
supplied, as specified in 3.2.3.1.2, only when the Info-transfer 
indication primitive corresponds to a request primitive in which the 
Called ICAO Facility Designation was supplied."

e. renumber as follows:
- 3.2.3.8.1.4 into 3.2.3.8.1.6;
- 3.2.3.8.1.4.1 into 3.2.3.8.1.6.1; and 
- 3.2.3.8.1.4.2 into 3.2.3.8.1.6.2.

SME Recommendation to CCB: RESOLVED

CCB Decision:		RESOLVED