diff --git a/asn1/asn1msgs.pl b/asn1/asn1msgs.pl
new file mode 100755
index 0000000..4b07a3b
--- /dev/null
+++ b/asn1/asn1msgs.pl
@@ -0,0 +1,35 @@
+#!/usr/bin/perl -w
+#use strict;
+
+# small script to extract the types used in elementary procedures
+# {HNBAP,RUA,RANAP}-PDU-Descriptions.asn and print them in an ASN.1
+# format that will trigger asn1c to generate associated structures
+#
+# Usage: ./asn1enum.pl < HNBAP-PDU-Descriptions.asn
+
+my $l;
+my @a;
+
+while ($l = <STDIN>) {
+	chomp($l);
+	if ($l =~ /^\s*(\S+\s*\S+)\s+(\S+)\s*$/) {
+		if ($1 eq 'INITIATING MESSAGE' ||
+		    $1 eq 'SUCCESSFUL OUTCOME' ||
+		    $1 eq 'UNSUCCESSFUL OUTCOME' ||
+	    	    $1 eq 'OUTCOME') {
+			push(@a, $2);
+		}
+	}
+}
+
+foreach my $k (@a) {
+	my $lk = $k;
+	my $firstchar = substr($lk, 0, 1);
+	if ($firstchar =~ /^[A-Z]/) {
+		substr($lk, 0, 1, lc($firstchar));
+	}
+	printf("%s ::= SEQUENCE {\n", $k);
+	printf("    %s-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,\n", $lk);
+	printf("    ...\n");
+	printf("}\n\n");
+}
diff --git a/asn1/hnbap/HNBAP-PDU.asn b/asn1/hnbap/HNBAP-PDU.asn
index f800b0d..6d32215 100644
--- a/asn1/hnbap/HNBAP-PDU.asn
+++ b/asn1/hnbap/HNBAP-PDU.asn
@@ -7,12 +7,14 @@
 BEGIN
 
 IMPORTS
+    maxProtocolIEs,
     Criticality,
     ProcedureCode,
     ProtocolIE-ID
 
 FROM HNBAP-CommonDataTypes;
 
+
 HNBAP-PDU ::= CHOICE {
     initiatingMessage       InitiatingMessage,
     successfulOutcome       SuccessfulOutcome,
@@ -38,6 +40,103 @@
     value           ANY
 }
 
+
+HNBRegisterRequest ::= SEQUENCE {
+    hnbRegisterRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+HNBRegisterAccept ::= SEQUENCE {
+    hnbRegisterAccept-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+HNBRegisterReject ::= SEQUENCE {
+    hnbRegisterReject-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UERegisterRequest ::= SEQUENCE {
+    ueRegisterRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UERegisterAccept ::= SEQUENCE {
+    ueRegisterAccept-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UERegisterReject ::= SEQUENCE {
+    ueRegisterReject-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UEDe-Register ::= SEQUENCE {
+    ueDe-Register-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+HNBDe-Register ::= SEQUENCE {
+    hnbDe-Register-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+ErrorIndication ::= SEQUENCE {
+    errorIndication-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+CSGMembershipUpdate ::= SEQUENCE {
+    csgMembershipUpdate-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+TNLUpdateRequest ::= SEQUENCE {
+    tnlUpdateRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+TNLUpdateResponse ::= SEQUENCE {
+    tnlUpdateResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+TNLUpdateFailure ::= SEQUENCE {
+    tnlUpdateFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+HNBConfigTransferRequest ::= SEQUENCE {
+    hnbConfigTransferRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+HNBConfigTransferResponse ::= SEQUENCE {
+    hnbConfigTransferResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationComplete ::= SEQUENCE {
+    relocationComplete-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+U-RNTIQueryRequest ::= SEQUENCE {
+    u-RNTIQueryRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+U-RNTIQueryResponse ::= SEQUENCE {
+    u-RNTIQueryResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+PrivateMessage ::= SEQUENCE {
+    privateMessage-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+
 IE ::= SEQUENCE {
     id ProtocolIE-ID,
     criticality Criticality,
diff --git a/asn1/ranap/RANAP-PDU.asn b/asn1/ranap/RANAP-PDU.asn
index 433efec..ec04f46 100644
--- a/asn1/ranap/RANAP-PDU.asn
+++ b/asn1/ranap/RANAP-PDU.asn
@@ -11,7 +11,11 @@
     ProcedureCode,
     ProtocolIE-ID
 
-FROM RANAP-CommonDataTypes;
+FROM RANAP-CommonDataTypes
+
+    maxProtocolIEs
+
+FROM RANAP-Constants;
 
 RANAP-PDU ::= CHOICE {
     initiatingMessage       InitiatingMessage,
@@ -45,6 +49,418 @@
     value           ANY
 }
 
+
+Iu-ReleaseCommand ::= SEQUENCE {
+    iu-ReleaseCommand-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+Iu-ReleaseComplete ::= SEQUENCE {
+    iu-ReleaseComplete-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationRequired ::= SEQUENCE {
+    relocationRequired-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationCommand ::= SEQUENCE {
+    relocationCommand-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationPreparationFailure ::= SEQUENCE {
+    relocationPreparationFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationRequest ::= SEQUENCE {
+    relocationRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationRequestAcknowledge ::= SEQUENCE {
+    relocationRequestAcknowledge-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationFailure ::= SEQUENCE {
+    relocationFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationCancel ::= SEQUENCE {
+    relocationCancel-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationCancelAcknowledge ::= SEQUENCE {
+    relocationCancelAcknowledge-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+SRNS-ContextRequest ::= SEQUENCE {
+    sRNS-ContextRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+SRNS-ContextResponse ::= SEQUENCE {
+    sRNS-ContextResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+SecurityModeCommand ::= SEQUENCE {
+    securityModeCommand-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+SecurityModeComplete ::= SEQUENCE {
+    securityModeComplete-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+SecurityModeReject ::= SEQUENCE {
+    securityModeReject-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+DataVolumeReportRequest ::= SEQUENCE {
+    dataVolumeReportRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+DataVolumeReport ::= SEQUENCE {
+    dataVolumeReport-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+Reset ::= SEQUENCE {
+    reset-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+ResetAcknowledge ::= SEQUENCE {
+    resetAcknowledge-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RAB-ReleaseRequest ::= SEQUENCE {
+    rAB-ReleaseRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+Iu-ReleaseRequest ::= SEQUENCE {
+    iu-ReleaseRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationDetect ::= SEQUENCE {
+    relocationDetect-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RelocationComplete ::= SEQUENCE {
+    relocationComplete-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+Paging ::= SEQUENCE {
+    paging-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+CommonID ::= SEQUENCE {
+    commonID-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+CN-InvokeTrace ::= SEQUENCE {
+    cN-InvokeTrace-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+CN-DeactivateTrace ::= SEQUENCE {
+    cN-DeactivateTrace-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+LocationReportingControl ::= SEQUENCE {
+    locationReportingControl-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+LocationReport ::= SEQUENCE {
+    locationReport-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+InitialUE-Message ::= SEQUENCE {
+    initialUE-Message-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+DirectTransfer ::= SEQUENCE {
+    directTransfer-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+Overload ::= SEQUENCE {
+    overload-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+ErrorIndication ::= SEQUENCE {
+    errorIndication-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+SRNS-DataForwardCommand ::= SEQUENCE {
+    sRNS-DataForwardCommand-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+ForwardSRNS-Context ::= SEQUENCE {
+    forwardSRNS-Context-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RAB-AssignmentRequest ::= SEQUENCE {
+    rAB-AssignmentRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RAB-AssignmentResponse ::= SEQUENCE {
+    rAB-AssignmentResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+PrivateMessage ::= SEQUENCE {
+    privateMessage-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+ResetResource ::= SEQUENCE {
+    resetResource-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+ResetResourceAcknowledge ::= SEQUENCE {
+    resetResourceAcknowledge-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RANAP-RelocationInformation ::= SEQUENCE {
+    rANAP-RelocationInformation-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RAB-ModifyRequest ::= SEQUENCE {
+    rAB-ModifyRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+LocationRelatedDataRequest ::= SEQUENCE {
+    locationRelatedDataRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+LocationRelatedDataResponse ::= SEQUENCE {
+    locationRelatedDataResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+LocationRelatedDataFailure ::= SEQUENCE {
+    locationRelatedDataFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+InformationTransferIndication ::= SEQUENCE {
+    informationTransferIndication-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+InformationTransferConfirmation ::= SEQUENCE {
+    informationTransferConfirmation-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+InformationTransferFailure ::= SEQUENCE {
+    informationTransferFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UESpecificInformationIndication ::= SEQUENCE {
+    uESpecificInformationIndication-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+DirectInformationTransfer ::= SEQUENCE {
+    directInformationTransfer-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UplinkInformationExchangeRequest ::= SEQUENCE {
+    uplinkInformationExchangeRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UplinkInformationExchangeResponse ::= SEQUENCE {
+    uplinkInformationExchangeResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UplinkInformationExchangeFailure ::= SEQUENCE {
+    uplinkInformationExchangeFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSSessionStart ::= SEQUENCE {
+    mBMSSessionStart-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSSessionStartResponse ::= SEQUENCE {
+    mBMSSessionStartResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSSessionStartFailure ::= SEQUENCE {
+    mBMSSessionStartFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSSessionUpdate ::= SEQUENCE {
+    mBMSSessionUpdate-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSSessionUpdateResponse ::= SEQUENCE {
+    mBMSSessionUpdateResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSSessionUpdateFailure ::= SEQUENCE {
+    mBMSSessionUpdateFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSSessionStop ::= SEQUENCE {
+    mBMSSessionStop-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSSessionStopResponse ::= SEQUENCE {
+    mBMSSessionStopResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSUELinkingRequest ::= SEQUENCE {
+    mBMSUELinkingRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSUELinkingResponse ::= SEQUENCE {
+    mBMSUELinkingResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSRegistrationRequest ::= SEQUENCE {
+    mBMSRegistrationRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSRegistrationResponse ::= SEQUENCE {
+    mBMSRegistrationResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSRegistrationFailure ::= SEQUENCE {
+    mBMSRegistrationFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSCNDe-RegistrationRequest ::= SEQUENCE {
+    mBMSCNDe-RegistrationRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSCNDe-RegistrationResponse ::= SEQUENCE {
+    mBMSCNDe-RegistrationResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSRABEstablishmentIndication ::= SEQUENCE {
+    mBMSRABEstablishmentIndication-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSRABReleaseRequest ::= SEQUENCE {
+    mBMSRABReleaseRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSRABRelease ::= SEQUENCE {
+    mBMSRABRelease-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+MBMSRABReleaseFailure ::= SEQUENCE {
+    mBMSRABReleaseFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+EnhancedRelocationCompleteRequest ::= SEQUENCE {
+    enhancedRelocationCompleteRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+EnhancedRelocationCompleteResponse ::= SEQUENCE {
+    enhancedRelocationCompleteResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+EnhancedRelocationCompleteFailure ::= SEQUENCE {
+    enhancedRelocationCompleteFailure-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+EnhancedRelocationCompleteConfirm ::= SEQUENCE {
+    enhancedRelocationCompleteConfirm-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RANAP-EnhancedRelocationInformationRequest ::= SEQUENCE {
+    rANAP-EnhancedRelocationInformationRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+RANAP-EnhancedRelocationInformationResponse ::= SEQUENCE {
+    rANAP-EnhancedRelocationInformationResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+SRVCC-CSKeysRequest ::= SEQUENCE {
+    sRVCC-CSKeysRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+SRVCC-CSKeysResponse ::= SEQUENCE {
+    sRVCC-CSKeysResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UeRadioCapabilityMatchRequest ::= SEQUENCE {
+    ueRadioCapabilityMatchRequest-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+UeRadioCapabilityMatchResponse ::= SEQUENCE {
+    ueRadioCapabilityMatchResponse-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+
 IE ::= SEQUENCE {
     id ProtocolIE-ID,
     criticality Criticality,
diff --git a/asn1/rua/RUA-PDU.asn b/asn1/rua/RUA-PDU.asn
index 159d8ac..ea2bccc 100644
--- a/asn1/rua/RUA-PDU.asn
+++ b/asn1/rua/RUA-PDU.asn
@@ -7,6 +7,7 @@
 BEGIN
 
 IMPORTS
+    maxProtocolIEs,
     Criticality,
     ProcedureCode,
     ProtocolIE-ID
@@ -38,6 +39,38 @@
     value           ANY
 }
 
+
+Connect ::= SEQUENCE {
+    connect-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+DirectTransfer ::= SEQUENCE {
+    directTransfer-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+Disconnect ::= SEQUENCE {
+    disconnect-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+ConnectionlessTransfer ::= SEQUENCE {
+    connectionlessTransfer-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+ErrorIndication ::= SEQUENCE {
+    errorIndication-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+PrivateMessage ::= SEQUENCE {
+    privateMessage-ies SEQUENCE (SIZE (0..maxProtocolIEs)) OF IE,
+    ...
+}
+
+
 IE ::= SEQUENCE {
     id ProtocolIE-ID,
     criticality Criticality,