【正文】 d the authentication procedure ............................................... 66 Handling of keys at intersystem change from UMTS to GSM.................................................................................. 66 Use of established security contexts ........................................................................................................................ 67 Handling of keys at intersystem change from GSM to UMTS.................................................................................. 67 Void 68 Identification procedure ................................................................................................................................................... 68 Identity request by the work....................................................................................................................................... 68 Identification response by the mobile station ............................................................................................................... 68 Abnormal cases.................................................................................................................................................................. 68 IMSI detach procedure ..................................................................................................................................................... 69 IMSI detach initiation by the mobile station................................................................................................................. 69 IMSI detach procedure in the work........................................................................................................................... 69 IMSI detach pletion by the mobile station............................................................................................................. 69 Abnormal cases.................................................................................................................................................................. 69 Abort procedure ................................................................................................................................................................. 70 Abort procedure initiation by the work .................................................................................................................... 70 3GPP 3GPP TS (202006) Release 4 5 Abort procedure in the mobile station............................................................................................................................ 70 MM information procedure ............................................................................................................................................. 70 MM information procedure initiation by the work ................................................................................................ 70 MM information procedure in the mobile station ........................................................................................................ 70 MM specific procedures ......................................................................................................................................................... 70 Location updating procedure ........................................................................................................................................... 71 Periodic updating ............................................................................................................................................................... 72 IMSI attach procedure ...................................................................................................................................................... 72 Generic Location Updating procedure........................................................................................................................... 73 Location updating initiation by the mobile station ...................................................................................................... 73 Network Request for Additional mobile station Capability Information .......................................................... 73 Identification request from the work ........................................................................................................................ 73 Authentication by the work ........................................................................................................................................ 73 Security mode setting by the work............................................................................................................................ 73 Attempt Counter ................................................................................................................................................................ 73 Location updating accepted by the work ................................................................................................................. 74 Location updating not accepted by the work........................................................................................................... 75 Release of RR connection after location updating....................................................................................................... 76 Abnormal cases on the mobile station side ................................................................................................................... 76 Abnormal cases on the work side ....................................................................................................................... 77 Void ..................................................................................................................................................................................... 78 Void ..................