ARINC 635-4:2003

1.0 INTRODUCTION
1.1 Purpose of this Document
1.2 Background
1.3 Relationship of this Document to ARINC
1.4 Relationship to OSI Protocols
1.5 Conventions Used in This Document
2.0 INTEROPERABILITY
2.1 Subnetwork Interoperability
3.0 FUNCTIONAL ASPECTS
3.1 General Description
3.2 System Architecture
3.3 Radio Frequency Management
3.4 Message Composition
3.5 Priorities
4.0 AIR/GROUND INTERFACES AND PROTOCOLS FOR LAYER 1 -
    THE PHYSICAL LAYER
4.1 Introduction
4.2 Physical Layer Service Definition
5.0 AIR/GROUND SERVICES AND PROTOCOLS OF LAYER 2 -
    LINK LAYER
5.1 Introduction
5.2 Link Layer Service Definition
5.3 Service Primitives
6.0 SERVICES AND PROTOCOL OF LAYER 3 - THE NETWORK LAYER
6.1 Introduction
6.2 Packet-Mode Data Service
6.3 Enveloped Packet-Mode Data Services
ATTACHMENTS
1-1 Airborne Subsystem Block Diagram
1-2 HFDL Reference Model
2-1 Airborne Station Protocol Layer Interfaces
2-2 HF Data Link Signal-In Space Definition
2-3 Data Modulator Encoding Functions
2-4 Rate 1/2 Convolutional Encoder
2-5 HF Signal-In-Space Minimum Packet Error Rate
      Performance With 1.8 Second Interleaver
2-6 Slotted Frame
2-7A Downlink MPDU Format
2-7B Uplink MPDU Format
2-7C Aircraft ID Definition
2-8A Squitter SPDU Format
2-8B Slot Assignments and Acknowledgements in Squitter
2-8C HFDL Bit Map Representations
2-8D Intra-Station Synchronization
2-8E Inter-Station Synchronization
2-9A LPDU Types and Format Definition
2-10A Unnumbered Data LPDU Format Definition
2-10B Numbered Data LPDU Format Definition
2-10C Unnumbered Data LPDU With Broadcast HFDL System
      Table
2-10D Log-On Request and Log-On Resume LPDU Format
      Definition
2-10E Log-On Confirm and Log-On Resume-Confirm
      LPDU Format Definition
2-10F Log-Off Request and Log-On Denied LPDU Format
      Definition
2-10G Unnumbered Acknowledged Data LPDU Format
      Definition
2-11 HFDL Log-On Procedures
2-12 Data Link Layer
2-13 Table 1 Link Management Layer State Transition
      Table - Aircraft
2-14 HF Data Link Contention Slot Selection Backoff
      Algorithm State Machine
2-15 Attachments-To-Sections Cross Reference
3-1 Packet-Mode Priorities
      Table 1 HF Data Link Subsystem Packet-Mode -
      Priority Structure
APPENDICES
A - Acronym List
B - References
C - Delayed Echo Application
ARINC Standard - Errata Report
ARINC IA Project Initiation/Modification (APIM) Guidelines for Submittal

The intent of this document is to provide general and specific design guidance for the development and installation of the protocols needed to exchange bit-oriented data using an air-ground HF data link operating in an Open System Interconnection (OSI) environment