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© 2013 The MITRE Corporation. All rights reserved. Dongsong Zeng– VDLSG Chair Presented to SC-214 Plenary May 8, 2013 VDLSG Status Report and Request for Change 1 to DO- 224C and DO-281B
| 2 || 2 | VDLSG/WG92 Goal and Key Contributions Goal: –To update the VDL2 standards, i.e., DO-224C, DO-281B, ED92B, and ICAO Doc 9776 to align the multi-frequency enhancements with ARINC631-6 VDLSG/WG92 Key Contribution Areas –Improved autotune capability –Separated Air-Ground frequencies –Added frequency support list management –Developed new test cases for multi-freq in MOPS © 2013 The MITRE Corporation. All rights reserved. Covered by ARINC 631-6
| 3 || 3 | Harmonized Standardization Process © 2013 The MITRE Corporation. All rights reserved Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4 MASPS, DO-224C FRAC Rels 4/11 FRAC Resol 10/11 Publication Apprvl12/11 A /11 Eurocontrol Validation inputs 5/11 VDLSG Established 3/10 A /08 MOPS, DO-281B Pub Apprvl 3/12 FRAC Rels 10/11 FRAC Resol 1/12 ICAO Doc 9776 AP # 310 ACP WGM19, 6/12 Final draft ACP WGM20 WP7, 1/2013 Change 1 to MASP MOPS FRAC Rels 8/13 FRAC, Resol 1/14 Rockwell Validation Inputs 4/13 Inputs to Change 1 Eurocontrol VDL2 MF Validation inputs to ACP WGM- 18, 7/11 P1 Lab test 9/10 P2 Flight trial Q4/10 P3 Airline trial Q4/11 Pub Apprv 3/14 ED92 Pub Apprvl 10/12 ED-92B
| 4 || 4 | ICAO Doc9776 Status Update Initiated ICAO Doc9776 update in ACP-WG-M-19 meeting, May 2012 ICAO Doc9776 Edition 2 final draft (WP7) submitted to ICAO in ACP-WG-M-20 meeting, January 2013 WGM members to provide comments on WP-07 by end February A validation activities summary letter is requested by the Secretary before ACP approval via correspondence. © 2013 The MITRE Corporation. All rights reserved.
| 5 || 5 | Coping with Issues from Standardization © 2013 The MITRE Corporation. All rights reserved. Issues coming from VDL2 Standards Development and Validation Post-publication MASPS and MOPS Issues Issues for future VDL2 Standards Change 1 to MASPS Change 1 to MOPS ARINC631-7&8 Within ARINC631-6 ScopeBeyond ARINC631-6 Scope
| 6 || 6 | Post-publication MASPS Issues During ICAO Doc 9776 update, we found 4 post-publication MASPS issues that were mis-aligned (not editorial) with ARINC –In Section , Timer T1 calculation should add 2xT1int. –Change TG4 name from “Minimum time between Ground Station Information Frames” to “Maximum time between Ground Station Information Frames” –In Section , Table 3-48b, Air-initiated Handoff response XID_RSP_HO (F=1), change ATN router NETs from optional to mandatory –In MASPS Section Aircraft Response to Ground- Requested Autotune, delete “or detected by hearing an uplink.” in sentence “If counter N2 is exceeded, the aircraft shall attempt a handoff to another ground station from the Replacement Ground Station List or detected by hearing an uplink.” These 4 issues have been incorporated in draft Change 1 to MASPS © 2013 The MITRE Corporation. All rights reserved.
| 7 || 7 | Post-publication MOPS Issues In total, thirty-five post-publication MOPS issues have been identified so far Eleven issues came from ED-92B and ICAO Doc9776 review, and have been incorporated in draft Change 1 to MOPS Twenty-four issues came from Rockwell Collins validation inputs (April 2013) –e.g., In some test cases, the receive sequence counter did not take link test and media advisory messages into account Most of them are corrections of test cases and not editorial If not corrected, compliance with MASPS, MOPS and TSO-C160 will be at risk Plan to resolve them in Change 1 to MOPS © 2013 The MITRE Corporation. All rights reserved.
| 8 || 8 | Harmonized Schedule for Change 1 –Next VDLSG/WG92/DLK joint meeting 7/30 – 8/1, 2013, Seattle –Telecons will be scheduled before and after the meeting In order to fully align MASPS and MOPS with A631-6, we request Change 1 to DO-224C and Change 1 to DO-281B be included in SC- 214 deliverables Request for Change 1 to MASPS and MOPS © 2013 The MITRE Corporation. All rights reserved. FRAC ReleaseFRAC Resolution Publication Approval Change 1 to DO-224C Change 1 to DO-281B SC-214 Plenary , August , 2013, Cologne, Germany SC-214 Plenary , January , 2014, Washington, DC PMC, March 2014 Corrigenda 1 to ED- 92B Open consultation in fall 2013Publication approval in beginning of 2014
| 9 || 9 | Back up slides
| 10 | DO-224C MASPS Status Draft DO-224C –VDL2 multi-frequency is updated to align with A631-6 –Approved for Final Review And Comment in Plenary 12, Berlin, April, 2011 –Received a total of 21 FRAC comments –VDLSG/WG92 collectively resolved all 21 FRAC comments by September 2011 –SC-214 Approved DO-224C in Plenary 13, Paris, September 2011 –PMC approved DO-224C publication in December 2011 © 2013 The MITRE Corporation. All rights reserved.
| 11 | DO-281B/ED92B Status DO-281B –Aligned with DO-224C and A631-6 –Approved for FRAC in October, 2011 –Received a total of 76 FRACs –VDLSG/WG92 collectively resolved all FRACs by Jan 30, 2012 –PMC publication approval in March 2012 ED-92B –Technical content same as DO-281B, with different traceability references –EUROCAE approved its publication in October 2012 © 2013 The MITRE Corporation. All rights reserved.
| 12 | Post-Publication MOPS Issues In Section , step 4 is missing In Table 2-3 of Section , GSE n should be GS n. Add Macro’s name to the title of Sections and In Step 7 of Section (a), change XID_CMD_HO(F=1) to XID_CMD_HO(P=1). In Section (c) preamble, add “SET”. In Section (a), change the title from “Ground Commanded Autotune” to “Ground Requested Autotune” In step 4 and 5 of Section , change “SNDCF header” to “SNDCF header with fast select facility set” © 2013 The MITRE Corporation. All rights reserved.
| 13 | Post-Publication MOPS Issues Replace CHECK 8208 with CHECK Network globally In Section , change the purpose to “Verify the procedures for expedited subnetwork connection maintenance” In Section , change the purpose to “Verify the procedures for broadcast subnetwork connection maintenance” Add Appendix E to DO-281 to list the differences between DO- 281 and ED-92 Rockwell Collins provided 24 new technical comments on MOPS test cases © 2013 The MITRE Corporation. All rights reserved.
| 14 | Post-Publication MOPS Issues © 2013 The MITRE Corporation. All rights reserved. Test NameCategoryproposed fixing 1SET8208XunworthyRemove this procedure that is not called in any other tests. 2CheckNetworkImprovement The term "RR" expected is not precise enough. Use X25 RR or VDL2 RR to avoid ambiguity 3 Timer T1 (delay before retransmission)CorrectionStep 6 (SEND LT RR (F=1)), has to be replaced by RR(F=0) 4 Timer T2 (delay before acknowledgement)precisionPrecise that T2 value of 500 ms has to include some MAC delay also.. 5 Timer T4 (maximum delay between transmissions) – SRMEditorialThere are unnumbered steps between Step 1 and Step 2, and step 8 and 9 6 Counter N2 (maximum number of transmissions)unworthy Step 3: not necessary. The Downlink message is retransmitted because the AOA/ATN has not acknowledged the message reception. 7Non-Operational ModeCommentThis assumes that the EUT does not switch in Mode A. 8INFO framesImprovement Step 7: "INFO (P=1) frame with an incorrect N(s)". The value of incorrect N(s) must be in the window [expected N(s)+1,expected N(s)+1+Windowsize], otherwise a RR will be send. 9Procedures for Transmission Test can not be performed This test is not doable as described: Step 8 -> not clear repeat Step 1-3 (it is not necessary to repeat step 1&2, only step 3a, 3b and 3c have to be repeated; nothing tells if the 50 INFO frames have to be send down)., Step 9 -> impossible W is not modifyed by XID CMD LE, Step 2 -> not possible to set N(R)=10 !). 10TEST FrameCorrectionIn prerequisite correct bit 12 into Bit Frequency Recovery – Air FSL (h)CorrectionStep 4. CMD_LE can also be used after a DISC, as per other tests. Validation Inputs from Rockwell Collins
not clear repeat Step 1-3 (it is not necessary to repeat step 1&2, only step 3a, 3b and 3c have to be repeated; nothing tells if the 50 INFO frames have to be send down)., Step 9 -> impossible W is not modifyed by XID CMD LE, Step 2 -> not possible to set N(R)=10 !). 10TEST FrameCorrectionIn prerequisite correct bit 12 into Bit 14 11 Frequency Recovery – Air FSL (h)CorrectionStep 4. CMD_LE can also be used after a DISC, as per other tests. Validation Inputs from Rockwell Collins">
| 15 | Post-Publication MOPS Issues © 2013 The MITRE Corporation. All rights reserved. 13 Aircraft Initiated Hand-off – N2 exceeded on connected ground stationImprovement Between step 7 and 8: necessary to wait TG5 otherwise the old link is still existing 14 Aircraft Initiated Hand-off – TG2 expired on connected ground stationImprovement Between step 7 and 8: necessary to wait TG5 otherwise the old link is still existing 15 Air Initiated Handoff (f) – N2 counter expiration on XID_CMD_HOImprovementBefore Step 7, wait TG5 to prevent old link to exist 16Ground Initiated Handoff (i)Improvement Preample 6 and Step 1 are identical ? Step 5 and Step 6 have to be switched in the column "actions": Step 5 VERIFY Step 6 SEND. 17Ground Requested Aircraft Initiated Handoff (k)Correction Step 4: Need N(r)=0 in uplinked RR… Does not take into account Q0 and SA labels exchanged 18Ground Requested Aircraft Initiated Handoff (m)Correction Step 4: Need N(r)=0 in uplinked RR… Does not take into account Q0 and SA labels exchanged Step 5: I could be interesting to precise the reason field Step 6: Replace GS2 by GS1 19Ground Requested Autotune (c)Correction Step 5 : Need N(r)=0 in uplinked RR… Does not take into account Q0 and SA labels exchanged 20Ground Requested Autotune (d)Correction Step 5 : Need N(r)=0 in uplinked RR… Does not take into account Q0 and SA labels exchanged 21Ground-Based Frequency Support List (i)Improvement In preamble, GS2 has to be configured to send GSIFs as per step 9 22Ground-Based Frequency Support List (k)unworthyStep 4: useless because EUT switches directly to GS3 23Ground-Based Frequency Support List (r)ImprovementStep 15/16: CMD_LE/RSP_HE is also acceptable 24Call Redirection for X.121-based NetworksCorrectionStep 3: Replace SEND UT by SEND LT Validation Inputs from Rockwell Collins
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