ETSI TS 101 351-1999 数字蜂窝通信系统(第2+阶段).一般分组无线业务(GPRS).移动台-GPRS服务支持节点(MS-SGSN)的逻辑链路控制(LLC)层规范GSM 04.64(版本6.4.0,1997年发布)
Digital Cellular Telecommunications System (Phase 2+); General Packet Radio Service (GPRS); Mobile Station - Serving GPRS Support Node (MS-SGSN) Logical Link Control (LLC) Layer Specification GSM 04.64 Version 6.4.0 Release 1997