diff --git a/openair3/S1AP/MESSAGES/ASN1/R15/s1ap-15.2.0.asn1 b/openair3/S1AP/MESSAGES/ASN1/R15/s1ap-15.2.0.asn1
index db1f1b59150a5d17de2764d473ddd2627dc91d23..97d0a6de871ff1b8c4dd48a45df457f7d423223a 100755
--- a/openair3/S1AP/MESSAGES/ASN1/R15/s1ap-15.2.0.asn1
+++ b/openair3/S1AP/MESSAGES/ASN1/R15/s1ap-15.2.0.asn1
@@ -6881,3 +6881,201 @@ id-EDT-Session										ProtocolIE-ID ::= 281
 id-CNTypeRestrictions								ProtocolIE-ID ::= 282
 
 END
+
+-- **************************************************************
+--
+-- Container definitions
+--
+-- **************************************************************
+
+S1AP-Containers {
+itu-t (0) identified-organization (4) etsi (0) mobileDomain (0) 
+eps-Access (21) modules (3) s1ap (1) version1 (1) s1ap-Containers (5) }
+
+DEFINITIONS AUTOMATIC TAGS ::= 
+
+BEGIN
+
+-- **************************************************************
+--
+-- IE parameter types from other modules.
+--
+-- **************************************************************
+
+IMPORTS
+	Criticality,
+	Presence,
+	PrivateIE-ID,
+	ProtocolExtensionID,
+	ProtocolIE-ID
+FROM S1AP-CommonDataTypes
+
+	maxPrivateIEs,
+	maxProtocolExtensions,
+	maxProtocolIEs
+FROM S1AP-Constants;
+
+-- **************************************************************
+--
+-- Class Definition for Protocol IEs
+--
+-- **************************************************************
+
+S1AP-PROTOCOL-IES ::= CLASS {
+	&id				ProtocolIE-ID 					UNIQUE,
+	&criticality	Criticality,
+	&Value,
+	&presence		Presence
+}
+WITH SYNTAX {
+	ID				&id
+	CRITICALITY		&criticality
+	TYPE			&Value
+	PRESENCE		&presence
+}
+
+-- **************************************************************
+--
+-- Class Definition for Protocol IEs
+--
+-- **************************************************************
+
+S1AP-PROTOCOL-IES-PAIR ::= CLASS {
+	&id					ProtocolIE-ID 				UNIQUE,
+	&firstCriticality	Criticality,
+	&FirstValue,
+	&secondCriticality	Criticality,
+	&SecondValue,
+	&presence			Presence
+}
+WITH SYNTAX {
+	ID				&id
+	FIRST CRITICALITY		&firstCriticality
+	FIRST TYPE				&FirstValue
+	SECOND CRITICALITY		&secondCriticality
+	SECOND TYPE				&SecondValue
+	PRESENCE				&presence
+}
+
+-- **************************************************************
+--
+-- Class Definition for Protocol Extensions
+--
+-- **************************************************************
+
+S1AP-PROTOCOL-EXTENSION ::= CLASS {
+	&id				ProtocolExtensionID			UNIQUE,
+	&criticality	Criticality,
+	&Extension,
+	&presence		Presence
+}
+WITH SYNTAX {
+	ID				&id
+	CRITICALITY		&criticality
+	EXTENSION		&Extension
+	PRESENCE		&presence
+}
+
+-- **************************************************************
+--
+-- Class Definition for Private IEs
+--
+-- **************************************************************
+
+S1AP-PRIVATE-IES ::= CLASS {
+	&id				PrivateIE-ID,
+	&criticality	Criticality,
+	&Value,
+	&presence		Presence
+}
+WITH SYNTAX {
+	ID				&id
+	CRITICALITY		&criticality
+	TYPE			&Value
+	PRESENCE		&presence
+}
+
+-- **************************************************************
+--
+-- Container for Protocol IEs
+--
+-- **************************************************************
+
+ProtocolIE-Container {S1AP-PROTOCOL-IES : IEsSetParam} ::= 
+	SEQUENCE (SIZE (0..maxProtocolIEs)) OF
+	ProtocolIE-Field {{IEsSetParam}}
+
+ProtocolIE-SingleContainer {S1AP-PROTOCOL-IES : IEsSetParam} ::= 
+	ProtocolIE-Field {{IEsSetParam}}
+
+ProtocolIE-Field {S1AP-PROTOCOL-IES : IEsSetParam} ::= SEQUENCE {
+	id				S1AP-PROTOCOL-IES.&id				({IEsSetParam}),
+	criticality		S1AP-PROTOCOL-IES.&criticality		({IEsSetParam}{@id}),
+	value			S1AP-PROTOCOL-IES.&Value			({IEsSetParam}{@id})
+}
+
+-- **************************************************************
+--
+-- Container for Protocol IE Pairs
+--
+-- **************************************************************
+
+ProtocolIE-ContainerPair {S1AP-PROTOCOL-IES-PAIR : IEsSetParam} ::= 
+	SEQUENCE (SIZE (0..maxProtocolIEs)) OF
+	ProtocolIE-FieldPair {{IEsSetParam}}
+
+ProtocolIE-FieldPair {S1AP-PROTOCOL-IES-PAIR : IEsSetParam} ::= SEQUENCE {
+	id					S1AP-PROTOCOL-IES-PAIR.&id					({IEsSetParam}),
+	firstCriticality	S1AP-PROTOCOL-IES-PAIR.&firstCriticality	({IEsSetParam}{@id}),
+	firstValue			S1AP-PROTOCOL-IES-PAIR.&FirstValue			({IEsSetParam}{@id}),
+	secondCriticality	S1AP-PROTOCOL-IES-PAIR.&secondCriticality	({IEsSetParam}{@id}),
+	secondValue			S1AP-PROTOCOL-IES-PAIR.&SecondValue		({IEsSetParam}{@id})
+}
+
+-- **************************************************************
+--
+-- Container Lists for Protocol IE Containers
+--
+-- **************************************************************
+
+ProtocolIE-ContainerList {INTEGER : lowerBound, INTEGER : upperBound, S1AP-PROTOCOL-IES : IEsSetParam} ::=
+	SEQUENCE (SIZE (lowerBound..upperBound)) OF
+	ProtocolIE-SingleContainer {{IEsSetParam}}
+
+ProtocolIE-ContainerPairList {INTEGER : lowerBound, INTEGER : upperBound, S1AP-PROTOCOL-IES-PAIR : IEsSetParam} ::=
+	SEQUENCE (SIZE (lowerBound..upperBound)) OF
+	ProtocolIE-ContainerPair {{IEsSetParam}}
+
+-- **************************************************************
+--
+-- Container for Protocol Extensions
+--
+-- **************************************************************
+
+ProtocolExtensionContainer {S1AP-PROTOCOL-EXTENSION : ExtensionSetParam} ::= 
+	SEQUENCE (SIZE (1..maxProtocolExtensions)) OF
+	ProtocolExtensionField {{ExtensionSetParam}}
+
+ProtocolExtensionField {S1AP-PROTOCOL-EXTENSION : ExtensionSetParam} ::= SEQUENCE {
+	id					S1AP-PROTOCOL-EXTENSION.&id				({ExtensionSetParam}),
+	criticality			S1AP-PROTOCOL-EXTENSION.&criticality	({ExtensionSetParam}{@id}),
+	extensionValue		S1AP-PROTOCOL-EXTENSION.&Extension		({ExtensionSetParam}{@id})
+}
+
+-- **************************************************************
+--
+-- Container for Private IEs
+--
+-- **************************************************************
+
+PrivateIE-Container {S1AP-PRIVATE-IES : IEsSetParam } ::= 
+	SEQUENCE (SIZE (1.. maxPrivateIEs)) OF
+	PrivateIE-Field {{IEsSetParam}}
+
+PrivateIE-Field {S1AP-PRIVATE-IES : IEsSetParam} ::= SEQUENCE {
+	id					S1AP-PRIVATE-IES.&id				({IEsSetParam}),
+	criticality			S1AP-PRIVATE-IES.&criticality		({IEsSetParam}{@id}),
+	value				S1AP-PRIVATE-IES.&Value				({IEsSetParam}{@id})
+}
+
+END