L-band Digital Aeronautical Communications System (LDACS)
draft-ietf-raw-ldacs-05

Document Type Active Internet-Draft (raw WG)
Authors Nils Mäurer  , Thomas Gräupl  , Corinna Schmitt 
Last updated 2020-11-14 (latest revision 2020-11-01)
Replaces draft-maeurer-raw-ldacs
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RAW                                                      N. Maeurer, Ed.
Internet-Draft                                           T. Graeupl, Ed.
Intended status: Informational             German Aerospace Center (DLR)
Expires: 5 May 2021                                      C. Schmitt, Ed.
                                         Research Institute CODE, UniBwM
                                                         1 November 2020

       L-band Digital Aeronautical Communications System (LDACS)
                        draft-ietf-raw-ldacs-05

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.  LDACS SHALL provide
   a data link for IP network-based aircraft guidance.  High reliability
   and availability for IP connectivity over LDACS are therefore
   essential.

Status of This Memo

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   This Internet-Draft will expire on 5 May 2021.

Copyright Notice

   Copyright (c) 2020 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

Maeurer, et al.            Expires 5 May 2021                   [Page 1]
Internet-Draft                    LDACS                    November 2020

   and restrictions with respect to this document.  Code Components
   extracted from this document must include Simplified BSD License text
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   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Motivation and Use Cases  . . . . . . . . . . . . . . . . . .   5
     3.1.  Voice Communications Today  . . . . . . . . . . . . . . .   5
     3.2.  Data Communications Today . . . . . . . . . . . . . . . .   6
   4.  Provenance and Documents  . . . . . . . . . . . . . . . . . .   7
   5.  Applicability . . . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  Advances Beyond the State-of-the-Art  . . . . . . . . . .   8
       5.1.1.  Priorities  . . . . . . . . . . . . . . . . . . . . .   8
       5.1.2.  Security  . . . . . . . . . . . . . . . . . . . . . .   8
       5.1.3.  High Data Rates . . . . . . . . . . . . . . . . . . .   9
     5.2.  Application . . . . . . . . . . . . . . . . . . . . . . .   9
       5.2.1.  Air-to-Ground Multilink . . . . . . . . . . . . . . .   9
       5.2.2.  Air-to-Air Extension for LDACS  . . . . . . . . . . .   9
       5.2.3.  Flight Guidance . . . . . . . . . . . . . . . . . . .  10
       5.2.4.  Business Communication of Airlines  . . . . . . . . .  11
       5.2.5.  LDACS Navigation  . . . . . . . . . . . . . . . . . .  11
   6.  Requirements to LDACS . . . . . . . . . . . . . . . . . . . .  11
   7.  Characteristics of LDACS  . . . . . . . . . . . . . . . . . .  13
     7.1.  LDACS Sub-Network . . . . . . . . . . . . . . . . . . . .  13
     7.2.  Topology  . . . . . . . . . . . . . . . . . . . . . . . .  14
     7.3.  LDACS Physical Layer  . . . . . . . . . . . . . . . . . .  14
     7.4.  LDACS Data Link Layer . . . . . . . . . . . . . . . . . .  15
     7.5.  LDACS Mobility  . . . . . . . . . . . . . . . . . . . . .  15
   8.  Reliability and Availability  . . . . . . . . . . . . . . . .  15
     8.1.  Layer 2 . . . . . . . . . . . . . . . . . . . . . . . . .  15
     8.2.  Beyond Layer 2  . . . . . . . . . . . . . . . . . . . . .  18
   9.  Protocol Stack  . . . . . . . . . . . . . . . . . . . . . . .  18
     9.1.  MAC Entity Services . . . . . . . . . . . . . . . . . . .  19
     9.2.  DLS Entity Services . . . . . . . . . . . . . . . . . . .  21
     9.3.  VI Services . . . . . . . . . . . . . . . . . . . . . . .  22
     9.4.  LME Services  . . . . . . . . . . . . . . . . . . . . . .  22
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