ETSI GS LTN 003旨在定义LTN系统的协议和接口。这与文件是一致的 关于LTN功能架构的GS LTN 002[5]。本文档旨在面向具有技术视角的受众，而用例文档 GS LTN 001[i.2]提出了更多关于LTN的面向业务的观点。

ETSI GS LTN 003 aims to define the protocols and interfaces of LTN systems. It goes along with the document GS LTN 002 [5] on LTN functional architecture.The present document is intended for an audience with a technical perspective, whereas the use case document GS LTN 001 [i.2] addresses more business-oriented views on LTN.