Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 4477

1. ICAO administers this block for assigning temporary aircraft addresses as described in section 7. 2. Block allocated for special use in the interest of flight safety. Number of addresses in block Allocation of blocks of addresses (a dash represents a bit value equal to 0 or 1) 1 024 4 096 32 768 262 144 1 048 576 28/11/02 No. 77 2007/70/II. szám 2007/70/II. szám 5/11/95 ANNEX 10 — VOLUME III 4/11/99 No. 74 CHAPTER 11. HF DATA LINK 11.1 DEFINITIONS AND SYSTEM CAPABILITIES Note.— The following Standards and Recommended Practices are specific to the high frequency data link (HFDL) and are in addition to the requirements specified in the ITU Radio Regulations (Appendix 27). The HFDL is a constituent mobile subnetwork of the aeronautical telecommunication network (ATN), operating in the aeronautical mobile (R) high frequency bands. In addition, the HFDL may provide non-ATN functions, such as direct link service (DLS). The HFDL system must enable aircraft to exchange data with ground-based users. 11.1.1 Definitions Coded chip. A “1” or “0” output of the rate ½ or ¼ convolutional code encoder. Designated operational coverage (DOC) area. The area in which a particular service is provided and in which the service is afforded frequency protection. Note.— This area may, after proper co-ordination to ensure frequency protection, extend to areas outside the allotment areas contained in Appendix S27 to the Radio Regulations. Direct link service (DLS). A data communications service which makes no attempt to automatically correct errors, detected or undetected, at the link layer of the air-ground communications path. (Error control may be effected by end-user systems.) High frequency network protocol data unit (HFNPDU). User data packet. Link protocol data unit (LPDU). Data unit which encapsulates a segment of an HFNPDU. Media access protocol data unit (MPDU). Data unit which encapsulates one or more LPDUs. M-ary phase shift keying (M-PSK) modulation. A digital phase modulation that causes the phase of the carrier waveform to take on one of a set of M values. M-PSK symbol. One of the M possible phase shifts of the M-PSK modulated carrier representing a group of log2 M coded chips. Peak envelope power (PEP). The peak power of the modulated signal supplied by the transmitter to the antenna transmission line. Physical layer protocol data unit (PPDU). Data unit passed to the physical layer for transmission, or decoded by the physical layer after reception. Quality of service (QOS). The information relating to data transfer characteristics used by various communications protocols to achieve various levels of performance for network users. Reliable link service (RLS). A data communications service provided by the subnetwork which automatically provides for error control over its link through error detection and requested retransmission of signal units found to be in error. Squitter protocol data unit (SPDU). Data packet which is broadcast every 32 seconds by an HFDL ground station on each of its operating frequencies, and which contains link management information. 11.2 HF DATA LINK SYSTEM 11.2.1 System architecture The HFDL system shall consist of one or more ground and aircraft station sub-systems, which implement the HFDL protocol (see 11.3). The HFDL system shall also include a ground management sub-system (see 11.4). 11.2.1.1 AIRCRAFT AND GROUND STATION SUB-SYSTEMS The HFDL aircraft station sub-system and the HFDL ground station sub-system shall include the following functions:

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