ARINC DlkRptNov20

Data Link (DLK) Systems Subcommittee Meeting Report, November 2020

Last Published: 
Friday, March 19, 2021

Data Link (DLK) Systems Subcommittee Meeting Report. Meeting held November 16-20, 2020, Online Meeting.

The DLK Systems Subcommittee met jointly with RTCA SC-214 and EUROCAE WG-92. The meeting was conducted online.

The DLK Systems Subcommittee reviewed inputs for:

  • Draft 3 of Supplement 9 to ARINC Specification 618, Air-Ground Character-Oriented Protocol Specification
  • Draft 2 of Supplement 9 to ARINC Specification 631, VHF Digital Link (VDL) Mode 2 Implementation Provisions

The status and schedule of the following VDL Mode 2 Industry Documents were also reviewed:

  • EUROCAE ED-92D: Minimum Operational Performance Standards (MOPS) for Aircraft VDL Mode 2 Physical Link and Network Layer
  • RTCA DO-281D: Minimum Operational Performance Standards (MOPS) for Aircraft VDL Mode 2 Physical Link and Network Layer
  • RTCA DO-224E: Signal-in-Space Minimum Aviation System Performance Standards (MASPS) for Advanced VHF Digital Data Communications Including Compatibility with Digital Voice Techniques

The DLK Systems Subcommittee concurred that a mature draft of:

  • Supplement 9 to ARINC Specification 618 is expected to be mature by May 2022.
  • Supplement 9 to ARINC Specification 631 is expected to be mature by December 2022.

The VDL Standards Group was briefed on a Collins Aerospace IMS Advanced VHF proposal that changes the modulation from the current VDLM2 Differential, 8-level, Phase Shift, Keying (D8PSK) modulation to a higher modulation rate.

The VDL Standards Group discussed how to address VDLM2 operation interference caused by airport LED lighting fixtures. Changing the ARINC 750 VHF Digital Radio’s channel sensing is one of the options that are being considered.

Please consult with RTCA and EUROCAE for information on RTCA SC-214/EUROCAE WG-92 activities during this meeting (e.g., Review of: RTCA DO-224 (MASPS), EUROCAE ED-92D/RTCA DO-281D (MOPS), etc.).

The group reviewed and updated the VDL Operational Issues for Standardization list, the IPS Requirements matrix and the Action Items List.

The next Data Link Systems Subcommittee online meeting is scheduled for January 26-29, 2021.

The handout materials from this meeting are reproduced as attachments to this report.

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