【正文】 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。 Stage 3 (Release 4) G L O BA L S Y S TE M FO R M O B ILE C O M M U N IC A TIO N SR The present document has been developed within the 3rd Generation Partnership Project (3GPP TM) and may be further elaborated for the purposes of 3GPP. The present document has not been subject to any approval process by the 3GPP Organisational Partners and shall not be implemented. This Specification is provided for future development work within 3GPP only. The Organisational Partners accept no liability for any use of this Specification. Specifications and reports for implementation of the 3GPP TM system should be obtained via the 3GPP Organisational Partners39。 Mobile radio interface Layer 3 specification。 3GPP TS (202006) Technical Specification 3rd Generation Partnership Project。 Technical Specification Group Core Network。 Core work protocols。 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 FRA