Title: ARF - QOS in D-START Primitives

PDR Reference:                   	99030003
Originator Reference:            	 
SARPs Document Reference:         	ADS SARPs, Sections 2.2.2.5.3.5.3.1,							2.2.2.5.3.5.3.2 and 2.2.2.5.4.7.1
Status:                        	ADOPTED
Impact:					C (Clarification) 
PDR Revision Date:                 	17/05/99 (PROPOSED -> RESOLVED)
						18/03/99 (ACCEPTED -> PROPOSED)
						01/03/99 (SUBMITTED -> ACCEPTED)        
PDR Submission Date:           	01/03/99 (SG2 meeting)
Submitting State/Organization:    	
Submitting Author Name:          	Picard, F
Submitting Author E-mail Address:  	picard_frederic@stna.dgac.fr
Submitting Author Supplemental 
Contact Information:                       
SARPs Date:                     	IV2.3 - Doc 9705 Ed.1
SARPs Language:                  	English

Summary of Defect:

Section 2.2.2.5.4.7.1 covers the ARF ASE exception handling requirement for the case where one of the QOS parameters is invalid within a D-START indication. 

Section 2.2.2.5.4.7.1 should also cover the case where the QOS Routing Class is not valid. The ARF ASE requirement associated with receiving a valid D-START indication needs to include a valid QOS Routing class as a precondition (2.2.2.5.3.5.3.1).

Assigned SME:                              Sub-Volume II SME

Proposed SARPs amendment: 

A check on the received Traffic Type value is needed to check the requested category (ATSC/AOC/other). If the AOC category is used instead of ATSC, if for some reason there is no AOC route available, the messages could not be transmitted. No check can be done on the ATSC route class since all values are authorised. 

1/ Change 2.2.2.5.3.5.3.1 from:

If in the RF-R-IDLE state, and if the D-START <DS-User Version Number> parameter is not compatible with the version number of the responding ADS-RF-ASE, and the <application service priority> parameter value is "high priority flight safety messages", and the <RER quality of service> parameter is the abstract value "low", and the <Calling Peer Id> parameter is a valid four to eight character facility designation, the responding ADS-RF-ASE shall:

to:

If in the RF-R-IDLE state, and if the D-START <DS-User Version Number> parameter is not compatible with the version number of the responding ADS-RF-ASE, and the <application service priority> parameter value is "high priority flight safety messages", and the <RER quality of service> parameter is the abstract value "low", and the <Routing Class quality of service> parameter identifies the traffic category "Air Traffic Service Communications (ATSC)", and the <Calling Peer Id> parameter is a valid four to eight character facility designation, the responding ADS-RF-ASE shall:

2/ Change 2.2.2.5.3.5.3.2 from:

If in the RF-R-IDLE state, and if the D-START <DS-User Version Number> parameter is compatible with the version number of the responding ADS-RF-ASE, the responding ADS-RF-ASE shall:

to:

If in the RF-R-IDLE state, and if the D-START <DS-User Version Number> parameter is compatible with the version number of the responding ADS-RF-ASE, and the <application service priority> parameter value is "high priority flight safety messages", and the <RER quality of service> parameter is the abstract value "low", and the <Routing Class quality of service> parameter identifies the traffic category "Air Traffic Service Communications (ATSC)", and the <Calling Peer Id> parameter is a valid four to eight character facility designation, the responding ADS-RF-ASE shall:

3/ Change 2.2.2.5.4.7.1 from:

Upon receipt of a D-START indication with the <application service priority> parameter set to a value other than the abstract value "high priority flight safety messages", or the <RER quality of service> parameter set to a value other than the abstract value "low", the ADS-RF-ASE shall:

to:

Upon receipt of a D-START indication with the <application service priority> parameter set to a value other than the abstract value "high priority flight safety messages", or the <RER quality of service> parameter set to a value other than the abstract value "low", or the <Routing Class quality of service> parameter set to a value not identifying the traffic category "Air Traffic Service Communications (ATSC)", the ADS-RF-ASE shall:

SME Recommendation to CCB:           	-      

CCB Decision:                      		atnp_ccb_chair (01/03/98): SUBMITTED
							CCB-9 (Naples): RESOLVED (17/05/99)