本文将从系统分层、协议层组织架构、技术体系架构、关键技术特点、协议栈、主要模块技术功能对ATSC 3.0协议层给以介绍,在此基础上进一步对ATSC3.0协议层的工作开展总结。首先介绍S33协议层的在系统和流程中的定位,图1覆盖了由底层到上层的各个层级,管理与协议层介于物理层与应用与表述层之间。在过去的ATSC 1.0时代(图2),MPEG-2传输 This article will introduce the ATSC 3.0 protocol layer from the system layering, the organization structure of the protocol layer, the technical architecture, the key technical features, the protocol stack and the main module technical functions. Based on this, we further carry out the work on the ATSC 3.0 protocol layer to sum up. First introduce the S33 protocol layer in the system and process positioning, Figure 1 covers all levels from the bottom to the upper, management and protocol layer between the physical layer and the application and presentation layer. In the past ATSC 1.0 era (Figure 2), MPEG-2 transmission