© Dr Dirk H Pesch, CIT, 2000-2002 1

GSM Signalling ScenariosGSM Signalling Scenarios

Telecommunications

MSc in Software Development

Basic GSM Message SequenceBasic GSM Message Sequence

© Dr Dirk H Pesch, CIT, 2000-2002 2

Connection Request ProcedureConnection Request Procedure

Paging ProcedurePaging Procedure

© Dr Dirk H Pesch, CIT, 2000-2002 3

Attach/Location RegistrationAttach/Location Registration

MS IndentificationMS Indentification

© Dr Dirk H Pesch, CIT, 2000-2002 4

MS AuthenticationMS Authentication

DetachDetach

© Dr Dirk H Pesch, CIT, 2000-2002 5

EncryptionEncryption

Location Update Process Location Update Process -- 11

© Dr Dirk H Pesch, CIT, 2000-2002 6

Location Update Process Location Update Process -- 22

Location Update Process Location Update Process -- 33

© Dr Dirk H Pesch, CIT, 2000-2002 7

MS Originating Call MS Originating Call -- 11

MS Originating Call MS Originating Call -- 22

© Dr Dirk H Pesch, CIT, 2000-2002 8

MS Originating Call MS Originating Call -- 33

MS Terminating Call MS Terminating Call -- 11

© Dr Dirk H Pesch, CIT, 2000-2002 9

MS Terminating Call MS Terminating Call -- 22

MS Terminating Call MS Terminating Call -- 33

© Dr Dirk H Pesch, CIT, 2000-2002 10

MS Terminating Call MS Terminating Call -- 44

MS Originating Call ClearingMS Originating Call Clearing

© Dr Dirk H Pesch, CIT, 2000-2002 11

MS Terminating Call ClearingMS Terminating Call Clearing

IntraIntra--BTS Handover Signalling BTS Handover Signalling -- 11

© Dr Dirk H Pesch, CIT, 2000-2002 12

IntraIntra--BTS Handover Signalling BTS Handover Signalling -- 22

IntraIntra--BSC Handover Signalling BSC Handover Signalling -- 33

© Dr Dirk H Pesch, CIT, 2000-2002 13

IntraIntra--BSC Handover Signalling BSC Handover Signalling -- 44

IntraIntra--MSC Handover Signalling MSC Handover Signalling -- 11

© Dr Dirk H Pesch, CIT, 2000-2002 14

IntraIntra--MSC Handover Signalling MSC Handover Signalling -- 22

IntraIntra--MSC Handover Signalling MSC Handover Signalling -- 33

© Dr Dirk H Pesch, CIT, 2000-2002 15

InterInter--MSC Handover Signalling MSC Handover Signalling -- 11

InterInter--MSC Handover Signalling MSC Handover Signalling -- 22

© Dr Dirk H Pesch, CIT, 2000-2002 16

Authentication SignallingAuthentication Signalling

Starting EncryptionStarting Encryption