diff --git a/doc/hnb_cs_lu.msc b/doc/hnb_cs_lu.msc
new file mode 100644
index 0000000..01546f6
--- /dev/null
+++ b/doc/hnb_cs_lu.msc
@@ -0,0 +1,45 @@
+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)" ];
+}
diff --git a/doc/hnb_cs_mo_call.msc b/doc/hnb_cs_mo_call.msc
new file mode 100644
index 0000000..a9253c0
--- /dev/null
+++ b/doc/hnb_cs_mo_call.msc
@@ -0,0 +1,75 @@
+msc {
+	hscale = "3";
+	ue,hnb,hnbgw,cn;
+
+	ue box hnb	[ label = "Radio Channel Establishment" ];
+	ue => hnb 	[ label = "RRC (CM SERV REQ)" ] ;
+	hnb => hnbgw 	[ label = "RUA CONNECT (RANAP Initial UE Msg (CM SERV REQ))" ];
+	hnbgw => cn	[ label = "SCCP CR (RANAP Initial UE Msg (CM SERV REQ))" ];
+	cn >> hnbgw	[ label = "SCCP CC" ];
+
+	---		[ label = "Optional retrieval of IMSI (if not given in CM 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 (CM SERV ACC))" ];
+	hnbgw >> hnb	[ label = "RUA DT (RANAP DirectTransfer (CM SERV ACC))" ];
+	hnb >> ue	[ label = "RRC (CM SERV ACC)" ];
+
+	ue box ue	[ label = "subscriber A dials a call" ];
+	ue => hnb	[ label = "RRC (CC SETUP)" ];
+	hnb => hnbgw	[ label = "RUA DT (RANAP DirectTransfer (CC SETUP))" ];
+	hnbgw => cn	[ label = "SCCP DT1 (RANAP DirectTransfer (CC SETUP))" ];
+
+	cn box cn	[ label = "Signalling towards B subscriber via ISUP, SIP, ..." ];
+	cn => hnbgw	[ label = "SCCP DT1 (RANAP DirectTransfer (CC ALERTING))" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP DirectTransfer (CC ALERTING))" ];
+	hnb => ue	[ label = "RC (CC ALERTING)" ];
+
+	---		[ label = "Assignment of Voice Channel" ];
+	cn => hnbgw	[ label = "SCCP DT1 (RANAP RAB Assign Cmd)" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP RAB Assign Cmd)" ];
+	hnb >> hnbgw	[ label = "RUA DT (RANAP RAB Assign Rsp)" ];
+	hnbgw >> cn	[ label = "SCCP DT1 (RANAP RAB Assign Rsp)" ];
+
+	cn box cn	[ label = "subscriber B picks up the ringing call" ];
+	cn => hnbgw	[ label = "SCCP DT1 (RANAP DirectTransfer (CC CALL CONF))" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP DirectTransfer (CC CALL CONF))" ];
+	hnb => ue	[ label = "RRC (CC CALL CONF)" ];
+
+	cn box ue	[ label = "Voice channel open" ];
+
+	ue box ue	[ label = "subscriber A hangs up" ];
+	ue => hnb	[ label = "RRC (CC DISCONNECT)" ];
+	hnb => hnbgw	[ label = "RUA DT (RANAP DirectTranfer (CC DISCONNECT))" ];
+	hnbgw => cn	[ label = "SCCP DT1 (RANAP DirectTranfer (CC DISCONNECT))" ];
+
+	cn box hnb	[ label = "RAB Release or Iu Release" ];
+}
diff --git a/doc/hnb_cs_mo_sms.msc b/doc/hnb_cs_mo_sms.msc
new file mode 100644
index 0000000..07013f1
--- /dev/null
+++ b/doc/hnb_cs_mo_sms.msc
@@ -0,0 +1,67 @@
+msc {
+	hscale = "3";
+	ue,hnb,hnbgw,cn;
+
+	ue box ue	[ label = "subscriber A sends text message" ];
+
+	ue box hnb	[ label = "Radio Channel Establishment" ];
+	ue => hnb 	[ label = "RRC (CM SERV REQ)" ] ;
+	hnb => hnbgw 	[ label = "RUA CONNECT (RANAP Initial UE Msg (CM SERV REQ))" ];
+	hnbgw => cn	[ label = "SCCP CR (RANAP Initial UE Msg (CM SERV REQ))" ];
+	cn >> hnbgw	[ label = "SCCP CC" ];
+
+	---		[ label = "Optional retrieval of IMSI (if not given in CM 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 (CM SERV ACC))" ];
+	hnbgw >> hnb	[ label = "RUA DT (RANAP DirectTransfer (CM SERV ACC))" ];
+	hnb >> ue	[ label = "RRC (CM SERV ACC)" ];
+
+	ue => hnb	[ label = "RRC (CP-DATA (RP-DATA (SMS SUBMIT)))" ];
+	hnb => hnbgw	[ label = "RUA DT (RANAP DirectTransfer (CP-DATA (RP-DATA (SMS-SUBMIT))))" ];
+	hnbgw => cn	[ label = "SCCP DT1 (RANAP DirectTransfer (CP-DATA (RP-DATA (SMS-SUBMIT))))" ];
+
+	cn => hnbgw	[ label = "SCCP DT1 (RANAP DirectTransfer (CP-ACK)" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP DirectTransfer (CP-ACK)" ];
+	hnb => ue	[ label = "RRC (CP-ACK)" ];
+
+	cn box cn	[ label = "MAP MO Forward SM to IWMSC / SMSC" ];
+
+	cn => hnbgw	[ label = "SCCP DT1 (RANAP DirectTransfer (CP-DATA (RP-ACK)" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP DirectTransfer (CP-DATA (RP-ACK)" ];
+	hnb => ue	[ label = "RRC (CP-DATA (RP-ACK)" ];
+
+	ue => hnb	[ label = "RRC (CP-ACK)" ];
+	hnb => hnbgw	[ label = "RUA DT (RANAP DirectTransfer (CP-ACK))" ];
+	hnbgw => cn	[ label = "SCCP DT1 (RANAP DirectTransfer (CP-ACK))" ];
+
+	cn box hnb	[ label = "RAB Release or Iu Release" ];
+}
diff --git a/doc/hnb_cs_mt_call.msc b/doc/hnb_cs_mt_call.msc
new file mode 100644
index 0000000..0a4c281
--- /dev/null
+++ b/doc/hnb_cs_mt_call.msc
@@ -0,0 +1,79 @@
+msc {
+	hscale = "3";
+	ue,hnb,hnbgw,cn;
+
+	cn box cn	[ label = "subscriber A dials a call; signalling arrives at CN" ];
+
+	cn => hnbgw	[ label = "SCCP UDT (RANAP Paging Command)" ];
+	hnbgw => hnb	[ label = "RUA ConnectionlessTransfer (RANAP Paging Command)" ];
+	hnb => ue 	[ label = "RRC Paging" ];
+	
+	ue box hnb	[ label = "Radio Channel Establishment" ];
+	ue => hnb 	[ label = "RRC (CM PAGING RESP)" ] ;
+	hnb => hnbgw 	[ label = "RUA CONNECT (RANAP Initial UE Msg (CM PAGING RESP))" ];
+	hnbgw => cn	[ label = "SCCP CR (RANAP Initial UE Msg (CM PAGING RESP))" ];
+	cn >> hnbgw	[ label = "SCCP CC" ];
+
+	---		[ label = "Optional retrieval of IMSI (if not given in CM 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 (CM SERV ACC))" ];
+	hnbgw >> hnb	[ label = "RUA DT (RANAP DirectTransfer (CM SERV ACC))" ];
+	hnb >> ue	[ label = "RRC (CM SERV ACC)" ];
+
+	cn => hnbgw	[ label = "SCCP DT1 (RANAP DirectTransfer (CC SETUP))" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP DirectTransfer (CC SETUP))" ];
+	hnb => ue	[ label = "RRC (CC SETUP)" ];
+
+	ue => hnb	[ label = "RC (CC ALERTING)" ];
+	hnb => hnbgw	[ label = "RUA DT (RANAP DirectTransfer (CC ALERTING))" ];
+	hnbgw => cn	[ label = "SCCP DT1 (RANAP DirectTransfer (CC ALERTING))" ];
+	cn box cn	[ label = "Signalling towards A subscriber via ISUP, SIP, ..." ];
+
+	---		[ label = "Assignment of Voice Channel" ];
+	cn => hnbgw	[ label = "SCCP DT1 (RANAP RAB Assign Cmd)" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP RAB Assign Cmd)" ];
+	hnb >> hnbgw	[ label = "RUA DT (RANAP RAB Assign Rsp)" ];
+	hnbgw >> cn	[ label = "SCCP DT1 (RANAP RAB Assign Rsp)" ];
+
+	ue => hnb	[ label = "RRC (CC CONNECT)" ];
+	hnb => hnbgw	[ label = "RUA DT (RANAP DirectTransfer (CC CONNECT))" ];
+	hnbgw => cn	[ label = "SCCP DT1 (RANAP DirectTransfer (CC CONNECT))" ];
+
+	cn box ue	[ label = "Voice channel open" ];
+
+	ue box ue	[ label = "subscriber B hangs up" ];
+	ue => hnb	[ label = "RRC (CC DISCONNECT)" ];
+	hnb => hnbgw	[ label = "RUA DT (RANAP DirectTranfer (CC DISCONNECT))" ];
+	hnbgw => cn	[ label = "SCCP DT1 (RANAP DirectTranfer (CC DISCONNECT))" ];
+
+	cn box hnb	[ label = "RAB Release or Iu Release" ];
+}
diff --git a/doc/hnb_cs_mt_sms.msc b/doc/hnb_cs_mt_sms.msc
new file mode 100644
index 0000000..8a1b808
--- /dev/null
+++ b/doc/hnb_cs_mt_sms.msc
@@ -0,0 +1,67 @@
+msc {
+	hscale = "3";
+	ue,hnb,hnbgw,cn;
+
+	cn box cn	[ label = "subscriber A send a SMS; signalling arrives at CN" ];
+
+	cn => hnbgw	[ label = "SCCP UDT (RANAP Paging Command)" ];
+	hnbgw => hnb	[ label = "RUA ConnectionlessTransfer (RANAP Paging Command)" ];
+	hnb => ue 	[ label = "RRC Paging" ];
+	
+	ue box hnb	[ label = "Radio Channel Establishment" ];
+	ue => hnb 	[ label = "RRC (CM PAGING RESP)" ] ;
+	hnb => hnbgw 	[ label = "RUA CONNECT (RANAP Initial UE Msg (CM PAGING RESP))" ];
+	hnbgw => cn	[ label = "SCCP CR (RANAP Initial UE Msg (CM PAGING RESP))" ];
+	cn >> hnbgw	[ label = "SCCP CC" ];
+
+	---		[ label = "Optional retrieval of IMSI (if not given in CM 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 (CP-DATA (RP-DATA (SMS DELIVER))))" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP DirectTransfer (CP-DATA (RP-DATA (SMS DELIVER))))" ];
+	hnb => ue	[ label = "RRC (CP-DATA (RP-DATA (SMS DELIVER)))" ];
+
+	ue => hnb	[ label = "RRC (CP-ACK)" ];
+	hnb => hnbgw	[ label = "RUA DT (RANAP DirectTransfer (CP-ACK))" ];
+	hnbgw => cn	[ label = "SCCP DT1 (RANAP DirectTransfer (CP-ACK))" ];
+	
+	ue => hnb	[ label = "RRC (CP-DATA (RP-ACK)" ];
+	hnb => hnbgw	[ label = "RUA DT (RANAP DirectTransfer (CP-DATA (RP-ACK)))" ];
+	hnbgw => cn	[ label = "SCCP DT1 (RANAP DirectTransfer (CP-DTA (RP-ACK)))" ];
+
+	cn => hnbgw	[ label = "SCCP DT1 (RANAP DirectTransfer (CP-ACK))" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP DirectTransfer (CP-ACK))" ];
+	hnb => ue	[ label = "RRC (CP-ACK)" ];
+
+	cn box cn	[ label = "MAP MT Forward SM to GMSC/SMSC" ];
+
+	cn box hnb	[ label = "RAB Release or Iu Release" ];
+}
diff --git a/doc/hnb_ps_lu.msc b/doc/hnb_ps_lu.msc
new file mode 100644
index 0000000..de2dce8
--- /dev/null
+++ b/doc/hnb_ps_lu.msc
@@ -0,0 +1,45 @@
+msc {
+	hscale = "3";
+	ue,hnb,hnbgw,cn;
+
+	ue box hnb	[ label = "Radio Channel Establishment" ];
+	ue => hnb 	[ label = "RRC (GMM IMSI ATTACH REQ)" ] ;
+	hnb => hnbgw 	[ label = "RUA CONNECT (RANAP Initial UE Msg (GMM IMSI ATTACH REQ))" ];
+	hnbgw => cn	[ label = "SCCP CR (RANAP Initial UE Msg (GMM IMSI ATTACH 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 (GMM IDENTITY REQ))" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP DirectTransfer (GMM IDENTITY REQ))" ];
+	hnb => ue	[ label = "RRC (GMM IDENTITY REQ)" ];
+	ue >> hnb	[ label = "RRC (GMM IDENTITY RESP)" ];
+	hnb >> hnbgw	[ label = "RUA DT (RANAP DirectTransfer (GMM IDENTITY RESP))" ];
+	hnbgw >> cn	[ label = "SCCP DT1 (RANAP DirectTransfer (GMM 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 (GMM AUTH REQ))" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP DirectTransfer (GMM AUTH REQ))" ];
+	hnb => ue	[ label = "RRC (GMM AUTH REQ)" ];
+	ue >> hnb	[ label = "RRC (GMM AUTH RESP)" ];
+	hnb >> hnbgw	[ label = "RUA DT (RANAP DirectTransfer (GMM AUTH RESP))" ];
+	hnbgw >> cn	[ label = "SCCP DT1 (RANAP DirectTransfer (GMM 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 (GMM IMSI ATTACH ACC))" ];
+	hnbgw >> hnb	[ label = "RUA DT (RANAP DirectTransfer (GMM IMSI ATTACH ACC))" ];
+	hnb >> ue	[ label = "RRC (GMM IMSI ATTACH ACC)" ];
+}
diff --git a/doc/hnb_ps_pdp_act.msc b/doc/hnb_ps_pdp_act.msc
new file mode 100644
index 0000000..2f2f3cf
--- /dev/null
+++ b/doc/hnb_ps_pdp_act.msc
@@ -0,0 +1,25 @@
+msc {
+	hscale="3", wordwraparcs="1";
+	ue,hnb,hnbgw,sgsn,ggsn;
+
+	ue box hnb	[ label = "Radio Channel Establishment, possibly already done by IMSI ATTACH / RAU" ];
+	ue => hnb	[ label = "RRC (SM PDP CTX ACT REQ)" ];
+	hnb => hnbgw 	[ label = "RUA DT (RANAP DirectTransfer (SM PDP CTX ACT REQ))" ];
+	hnbgw => sgsn	[ label = "SCCP DT1 (RANAP DirectTransfer (SM PDP CTX ACT REQ))" ];
+
+	sgsn => ggsn	[ label = "GTP-C PDP CTX ACT REQ" ];
+	ggsn >> sgsn	[ label = "GTP-C PDP CTX ACT ACK (IP+TEI of GGSN)" ];
+
+	sgsn => hnbgw	[ label = "SCCP DT1 (RANAP Activate RAB Req (IP+TEI of GGSN)" ];
+	hnbgw => hnb	[ label = "RUA DT (RANAP Activate RAB Req (IP+TEI of GGSN)" ];
+	hnb box ue	[ label = "RAB Establishment" ];
+	hnb >> hnbgw	[ label = "RUA DT (RANAP Activate RAB Resp (IP + TEI of HNB)" ];
+	hnbgw >> sgsn	[ label = "SCCP DT1 (RANAP Activate RAB Resp (IP + TEI of HNB)" ];
+
+	sgsn => ggsn	[ label = "GTP-C PDP CTX MOD REQ (IP + TEI of HNB)" ];
+	ggsn >> sgsn	[ label = "GTP-C PDP CTX MOD RESP" ];
+
+	sgsn >> hnbgw	[ label = "SCCP DT1 (RANAP DirectTransfer (SM PDP CTX ACT ACK))" ];
+	hnbgw >> hnb	[ label = "RUA DT (RANAP DirectTransfer (SM PDP CTX ACT ACK))" ];
+	hnb >> ue	[ label = "RRC (SM PDP CTX ACT ACK))" ];
+}