ETSI TS 132 421-2020 数字蜂窝通信系统(第2+阶段)(GSM);通用移动通信系统(UMTS);LTE;电信管理;用户和设备跟踪;跟踪概念和需求(V16.1.0;3GPP TS 32.421版本16.1.0发行版16)
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Subscriber and equipment trace; Trace concepts and requirements (V16.1.0; 3GPP TS 32.421 version 16.1.0 Rele