ETSI TS 101 351
ETSI TS 101 351
Digital cellular telecommunications system (Phase 2+) (GSM); 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)
standard published 08/01/1999 by European Telecommunications Standards Institute