【正文】 ALL (NORMAL SERVICE) ..................................................................... 53 Service State, RECEIVING GROUP CALL (LIMITED SERVICE) ...................................................................... 54 Service state when back to state MM IDLE from another state ................................................................................ 54 Behaviour in state GMMDEREGISTERED ............................................................................................................... 55 Primary substate selection................................................................................................................................................ 55 Selection of the substate after power on or enabling the MS39。 Core work protocols。 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。 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。 Technical Specification Group Core Net