ETSI TS 148 018-2017 数字蜂窝通信系统(第2+阶段)(GSM全球移动通信系统);通用分组无线业务(GPRS);基站系统(BSS)—GPRS服务支持节点(SGSN);通用分组无线电服务基站系统协议(BSSGP)(V14.2.0;3GPP TS 48.018 版本14.2.0 发行版本14)
Digital cellular telecommunications system (Phase 2+) (GSM); General Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN); BSS GPRS protocol (BSSGP) (V14.4.0; 3GPP TS 48.018 version 14.4.0 Release 14)