L-band Digital Aeronautical Communications System (LDACS)
draft-maeurer-raw-ldacs-00

Document Type Active Internet-Draft (individual)
Last updated 2019-11-05
Stream (None)
Intended RFC status (None)
Formats plain text html xml pdf htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
RAW                                                      N. Maeurer, Ed.
Internet-Draft                                           T. Graeupl, Ed.
Intended status: Informational             German Aerospace Center (DLR)
Expires: 8 May 2020                                      C. Schmitt, Ed.
                                         Research Institute CODE, UniBwM
                                                         5 November 2019

       L-band Digital Aeronautical Communications System (LDACS)
                       draft-maeurer-raw-ldacs-00

Abstract

   This document provides an overview of the architecture of the L-band
   Digital Aeronautical Communications System (LDACS), which provides a
   secure, scalable and spectrum efficient terrestrial data link for
   civil aviation.  LDACS is a scheduled, reliable multi-application
   cellular broadband system with support for IPv6.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on 8 May 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components
   extracted from this document must include Simplified BSD License text

Maeurer, et al.            Expires 8 May 2020                   [Page 1]
Internet-Draft                    LDACS                    November 2019

   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Terms used in this document . . . . . . . . . . . . . . .   3
   3.  Motivation and Use Cases  . . . . . . . . . . . . . . . . . .   4
     3.1.  Voice Communications Today  . . . . . . . . . . . . . . .   5
     3.2.  Data Communications Today . . . . . . . . . . . . . . . .   5
   4.  Provenance and Documents  . . . . . . . . . . . . . . . . . .   6
   5.  Characteristics . . . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  LDACS Physical Layer  . . . . . . . . . . . . . . . . . .   7
     5.2.  LDACS Data Link Layer . . . . . . . . . . . . . . . . . .   8
     5.3.  LDACS Data Rates  . . . . . . . . . . . . . . . . . . . .   8
     5.4.  Reliability and Availability  . . . . . . . . . . . . . .   8
       5.4.1.  LDACS Medium Access . . . . . . . . . . . . . . . . .   8
       5.4.2.  LDACS Resource Allocation . . . . . . . . . . . . . .   9
       5.4.3.  LDACS Handovers . . . . . . . . . . . . . . . . . . .   9
   6.  Architecture  . . . . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  Protocol Stack  . . . . . . . . . . . . . . . . . . . . .  10
       6.1.1.  Medium Access Control (MAC) Entity Services . . . . .  12
       6.1.2.  Data Link Service (DLS) Entity Services . . . . . . .  13
       6.1.3.  Voice Interface (VI) Services . . . . . . . . . . . .  13
       6.1.4.  Link Management Entity (LME) Services . . . . . . . .  13
       6.1.5.  Sub-Network Protocol (SNP) Services . . . . . . . . .  13
     6.2.  LDACS Logical Communication Channels  . . . . . . . . . .  14
     6.3.  LDASC Framing Structure . . . . . . . . . . . . . . . . .  15
       6.3.1.  Forward Link  . . . . . . . . . . . . . . . . . . . .  15
       6.3.2.  Reverse Link  . . . . . . . . . . . . . . . . . . . .  15
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  16
   8.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  17
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  17
   11. Normative References  . . . . . . . . . . . . . . . . . . . .  17
   12. Informative References  . . . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19

Maeurer, et al.            Expires 8 May 2020                   [Page 2]
Internet-Draft                    LDACS                    November 2019
Show full document text