MH/T 4028.1-2021 in English
VALIDConfiguration of communication equipments for civil aviation air traffic control service—Voice communication
- Issued on:2021-10-21
- Implemented on:2022-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
本文件规定了民用航空空中交通管理地空语音通信地面设备，包括甚高频地空通信系统、高频地空通信系统、信号传输、语音通信交换系统、应急通信终端设备、语音记录仪等系统和设备的配置要求。
本文件适用于不同规模的民用航空空中交通管制单位（区域、终端区、进近、塔台）的地空语音通信系统地面设备的配置。
Introduction
Background of Standard Revision and Scope of Application
The 2021 version of the standard replaces the 2010 version of MH/T 4028.1, and mainly upgrades the technology of core equipment such as VHF ground-to-air communication system and voice communication switching system. It is applicable to the equipment configuration of three types and six scales of control units: regional control, terminal area control (A/B level), and tower control (A/B/C level).
Core configuration classification system
| Classification type | Applicable conditions | Typical configuration features |
|---|---|---|
| Area control | Route control business | Dual frequency coverage + primary and standby voice switching system |
| Terminal Class A | ≥3 sectors or annual guarantee ≥100,000 flights | Independent emergency equipment + dual seat configuration |
| Tower Class C | Annual take-offs and landings <2,400 flights | Allow single-machine configuration + simplified switching system |
Analysis of key technical requirements
1. VHF communication system
Regional control needs to achieve dual signal coverage (2+ stations), and the tower A level requires independent configuration of airport/ground frequencies. All levels must include the 121.5MHz emergency frequency, and its coverage requirements are shown in the following table:
2. Voice communication switching system
Regional and terminal A levels need to be configured with two main and standby systems, and the seat equipment adopts "1+1" or "2+1" redundancy mode. The system interface must meet the following requirements:
- 100% redundant access to wireless channels
- Consistent specifications of wired/wireless interfaces
- Clock synchronization accuracy ≤1ms
Implementation recommendations
Transition plan between old and new standards
For the existing 2010 version systems, it is recommended to focus on the following transformations:
- Adding regional control emergency VHF stations
- Upgrading the multi-channel recording capability of the tower's Class A voice recorder
- Optimizing the frequency allocation strategy for the terminal area
Special scenario processing
It is recommended that plateau airports be additionally equipped with an HF ground-to-air communication system as a supplement to the VHF. The equipment selection must comply with the weather resistance requirements of Clause 5.2.3.
Technology Evolution Trends
The standard reflects three major technology development directions:
- Modular design: Voice switching systems support hot-swappable component replacement
- Heterogeneous redundancy: The primary and standby systems use equipment from different manufacturers
- Intelligent monitoring: New requirements for self-diagnosis of device status
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