osmo-iuh/doc/hnb_cs_lu.msc

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msc {
hscale = "3";
ue,hnb,hnbgw,cn;
ue box hnb [ label = "Radio Channel Establishment" ];
ue => hnb [ label = "RRC (MM LOC UPD REQ)" ] ;
hnb => hnbgw [ label = "RUA CONNECT (RANAP Initial UE Msg (MM LOC UPD REQ))" ];
hnbgw => cn [ label = "SCCP CR (RANAP Initial UE Msg (MM LOC UPD REQ))" ];
cn >> hnbgw [ label = "SCCP CC" ];
--- [ label = "Optional retrieval of IMSI (if not given in LU or retrived from VLR by TMSI)" ];
cn => hnbgw [ label = "SCCP DT1 (RANAP DirectTransfer (MM IDENTITY REQ))" ];
hnbgw => hnb [ label = "RUA DT (RANAP DirectTransfer (MM IDENTITY REQ))" ];
hnb => ue [ label = "RRC (MM IDENTITY REQ)" ];
ue >> hnb [ label = "RRC (MM IDENTITY RESP)" ];
hnb >> hnbgw [ label = "RUA DT (RANAP DirectTransfer (MM IDENTITY RESP))" ];
hnbgw >> cn [ label = "SCCP DT1 (RANAP DirectTransfer (MM IDENTITY RESP))" ];
--- [ label = "Mandatory activation of Integrity Protection" ];
cn => hnbgw [ label = "SCCP DT1 (RANAP SecurityModeCommand (IK))" ];
hnbgw => hnb [ label = "RUA DT (RANAP SecurityModeCommand (IK))" ];
hnb >> hnbgw [ label = "RUA DT (RANAP SecurityModeResponse (IK))" ];
hnbgw >> cn [ label = "SCCP DT1 (RANAP SecurityModeResponse (IK))" ];
cn => hnbgw [ label = "SCCP DT1 (RANAP CommonID)" ];
hnbgw => hnb [ label = "RUA DT (RANAP CommonID)" ];
--- [ label = "Optional Authentication" ];
cn => hnbgw [ label = "SCCP DT1 (RANAP DirectTransfer (MM AUTH REQ))" ];
hnbgw => hnb [ label = "RUA DT (RANAP DirectTransfer (MM AUTH REQ))" ];
hnb => ue [ label = "RRC (MM AUTH REQ)" ];
ue >> hnb [ label = "RRC (MM AUTH RESP)" ];
hnb >> hnbgw [ label = "RUA DT (RANAP DirectTransfer (MM AUTH RESP))" ];
hnbgw >> cn [ label = "SCCP DT1 (RANAP DirectTransfer (MM AUTH RESP))" ];
--- [ label = "Optional activation of Encryption" ];
cn => hnbgw [ label = "SCCP DT1 (RANAP SecurityModeCommand (IK+CK))" ];
hnbgw => hnb [ label = "RUA DT (RANAP SecurityModeCommand (IK+CK))" ];
hnb >> hnbgw [ label = "RUA DT (RANAP SecurityModeResponse (IK+CK))" ];
hnbgw >> cn [ label = "SCCP DT1 (RANAP SecurityModeResponse (IK+CK))" ];
cn >> hnbgw [ label = "SCCP DT1 (RANAP DirectTransfer (MM LOC UPD ACC))" ];
hnbgw >> hnb [ label = "RUA DT (RANAP DirectTransfer (MM LOC UPD ACC))" ];
hnb >> ue [ label = "RRC (MM LOC UPD ACC)" ];
}