【正文】 ............................................... 91 Change of work mode of operation........................................................................................................................... 91 Change of work mode of operation in GSM (GSM only) .............................................................................. 91 Change of work mode of operation in UMTS (UMTS only)......................................................................... 92 Change of work mode of operation at UMTS to GSM intersystem change .............................................. 92 Change of work mode of operation at GSM to UMTS intersystem change .............................................. 93 Intersystem change between GSM and UMTS ............................................................................................................ 94 List of forbidden PLMNs for GPRS service.....。 2020, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC). All rights reserved. 3GPP 3GPP TS (202006) Release 4 3 Contents Foreword .............................................................................................................................................. 21 Introduction .......................................................................................................................................... 21 1 Scope .......................................................................................................................................... 22 Scope of the Technical Spec ification ................................................................................................................................... 22 Application to the interface structures ................................................................................................................................. 22 Structure of layer 3 procedures.............................................................................................................................................. 22 Test procedures ........................................................................................................................................................................ 22 Use of logical channels in A/Gb mode ................................................................................................................................ 23 Overview of control procedures ............................................................................................................................................ 23 List of procedures .............................................................................................................................................................. 23 Applicability of implementations.......................................................................................................................................... 25 Vo ice Group Call Service (VGCS) and Voice Broadcast Service (VBS) ............................................................... 25 General Packet Radio Service (GPRS) .......................................................................................................................... 25 Packet services in GSM (GSM only) ............................................................................................................................. 25 Packet services in UMTS (UMTS only)........................................................................................................................ 26 2 References ................................................................................................................................... 26 Definitions and abbreviations ................................................................................................................................................ 30 Random values................................................................................................................................................................... 30 Vocabulary.......................................................................................................................................................................... 31 3 Radio Resource management procedures ....................................................................................... 32 4 Elementary procedures for Mobility Management .......................................................................... 32 General....................................................................................................................................................................................... 32 MM and GMM procedures .............................................................................................................................................. 33 Types of MM and GMM procedures ............................................................................................................................. 33 Integrity Checking of Signalling Messages in the Mobile Station (UMTS only) ............................................ 34 Integrity protection for emergency call (UMTS only).......................................................................................... 35 MMGMM coordination for GPRS MS39。 Mobile radio interface Layer 3 specification。 Technical Specification Group Core Network。 Publications Offices. 3GPP 3GPP TS (202006) Release 4 2 Keywords UMTS, GSM, radio, layer 3, stage 3 3GPP Postal address 3GPP support office address 650 Route des Lucioles Sophia Antipolis Valbonne FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Inter Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.