ETSI TS 144 064-2017 数字蜂窝通信系统(第2+阶段)(GSM全球移动通信系统);移动台服务GPRS(通用分组无线业务)支持节点(MS-SGSN);逻辑链路控制(LLC)层规范(V14.0.0;3GPP TS 44.064,版本14.0.0 发行版本14)
Digital cellular telecommunications system (Phase 2+) (GSM); Mobile Station - Serving GPRS Support Node (MS-SGSN); Logical Link Control (LLC) Layer Specification (V14.2.0; 3GPP TS 44.064 version 14.2.0 Release 14)