ETSI TS 144 065-2017 数字蜂窝通信系统(第2+阶段)(GSM全球移动通信系统); 通用分组无线业务服务支持节点(SGSN);子网相关汇聚协议(SNDCP)(V14.0.0;3GPP TS 44.065,版本14.0.0 发行版本14)
Digital cellular telecommunications system (Phase 2+) (GSM); Mobile Station (MS) - Serving GPRS Support Node (SGSN); Subnetwork Dependent Convergence Protocol (SNDCP) (V14.1.0; 3GPP TS 44.065 version 14.1.0 Release 14)