Firstly in this paper, the development course of AIS and its basic operation principles are introduced briefly, and also the communication principle of STDMA is analyzed.

• 本文首先简要介绍了船载自动识别系统的发展概况及其系统结构和原理，进而对AIS的通信原理即自组织时分多址(STDMA)通信原理进行了分析，并尝试性地建立起一套AIS的网络性能评价指标。