L-band Digital Aeronautical Communications System (LDACS)
draft-maeurer-raw-ldacs-02

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RAW                                                      N. Maeurer, Ed.
Internet-Draft                                           T. Graeupl, Ed.
Intended status: Informational             German Aerospace Center (DLR)
Expires: 3 October 2020                                  C. Schmitt, Ed.
                                         Research Institute CODE, UniBwM
                                                            1 April 2020

       L-band Digital Aeronautical Communications System (LDACS)
                       draft-maeurer-raw-ldacs-02

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

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   This Internet-Draft will expire on 3 October 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   Please review these documents carefully, as they describe your rights
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Maeurer, et al.          Expires 3 October 2020                 [Page 1]
Internet-Draft                    LDACS                       April 2020

   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Terms used in this document . . . . . . . . . . . . . . .   3
   3.  Motivation and Use Cases  . . . . . . . . . . . . . . . . . .   4
     3.1.  Voice Communications Today  . . . . . . . . . . . . . . .   4
     3.2.  Data Communications Today . . . . . . . . . . . . . . . .   5
   4.  Provenance and Documents  . . . . . . . . . . . . . . . . . .   6
   5.  Characteristics . . . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  LDACS Sub-Network . . . . . . . . . . . . . . . . . . . .   7
     5.2.  LDACS Physical Layer  . . . . . . . . . . . . . . . . . .   7
     5.3.  LDACS Data Link Layer . . . . . . . . . . . . . . . . . .   8
     5.4.  LDACS Data Rates  . . . . . . . . . . . . . . . . . . . .   8
     5.5.  Reliability and Availability  . . . . . . . . . . . . . .   8
       5.5.1.  LDACS Medium Access . . . . . . . . . . . . . . . . .   8
       5.5.2.  LDACS Mobility  . . . . . . . . . . . . . . . . . . .   9
       5.5.3.  LDACS Incremental Deployment  . . . . . . . . . . . .  10
   6.  Protocol Stack  . . . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  Medium Access Control (MAC) Entity Services . . . . . . .  11
     6.2.  Data Link Service (DLS) Entity Services . . . . . . . . .  13
     6.3.  Voice Interface (VI) Services . . . . . . . . . . . . . .  14
     6.4.  LDACS Management Entity (LME) Services  . . . . . . . . .  14
     6.5.  Sub-Network Protocol (SNP) Services . . . . . . . . . . .  14
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   8.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  15
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  15
   11. Normative References  . . . . . . . . . . . . . . . . . . . .  16
   12. Informative References  . . . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   One of the main pillars of the modern Air Traffic Management (ATM)
   system is the existence of a communication infrastructure that
   enables efficient aircraft control and safe separation in all phases
   of flight.  Current systems are technically mature but suffering from
   the VHF band's increasing saturation in high-density areas and the
   limitations posed by analogue radio communications.  Therefore,
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