In this update we fixed some imprecise wording, especially in the security section. Furthermore work on restructuring paragraphs with the important IETF words defined in RFC 2119 MUST, MUST NOT, SHOULD, SHOULD NOT, MAY was started.
With this update and renaming of the draft, the WG RAW has officially adopted the working document for LDACS. Thus we have incorporated all the feedback from the WG RAW we received after the version draft-maeurer-raw-ldacs-06.
In this update we go deeper about the requirements for digital datalinks in aeronautics. We have updated chapter 6 for that purpose and explained requirements in depth coming from RTCA DO-350A.
We have received feedback on ground infrastructure, security, requirement analysis and more. Thus we created chapter 6 - Requirements to LDACS - and extended the chapter 8 on reliability and chapter 10 on security extensively.
In version 04, we added section "7. Reliability and Availability", where we list LDACS reliability measures for reliable and robust transmission of wireless data. These include PHY layer robustness due to robust modulation and coding, a fixed frame structure, robust resource scheduling, efficient load balancing, ARQ protocols and priority mechanisms for data prioritization, just to name a few.
We added section "5. Applicability" were we explain the difference between LDACS and legacy data links for digital aeronautical data links for civil aviation data traffic. These include message priorities, security features, high data-rates, multi-link environment, air-to-air extension and full CNS capability.
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.