diff --git a/e2sm/lib/EN-GNB-ID.c b/e2sm/lib/EN-GNB-ID.c
new file mode 100644
index 0000000..98b8263
--- /dev/null
+++ b/e2sm/lib/EN-GNB-ID.c
@@ -0,0 +1,94 @@
+/*
+ * Generated by asn1c-0.9.29 (http://lionet.info/asn1c)
+ * From ASN.1 module "E2SM-RC-IEs"
+ * 	found in "e2sm-rc-nov2021.asn"
+ * 	`asn1c -fcompound-names -fno-include-deps -findirect-choice -pdu=auto -gen-PER -gen-OER -no-gen-example -D .`
+ */
+
+#include "EN-GNB-ID.h"
+
+static int
+memb_en_gNB_ID_constraint_1(const asn_TYPE_descriptor_t *td, const void *sptr,
+			asn_app_constraint_failed_f *ctfailcb, void *app_key) {
+	const BIT_STRING_t *st = (const BIT_STRING_t *)sptr;
+	size_t size;
+	
+	if(!sptr) {
+		ASN__CTFAIL(app_key, td, sptr,
+			"%s: value not given (%s:%d)",
+			td->name, __FILE__, __LINE__);
+		return -1;
+	}
+	
+	if(st->size > 0) {
+		/* Size in bits */
+		size = 8 * st->size - (st->bits_unused & 0x07);
+	} else {
+		size = 0;
+	}
+	
+	if((size >= 22 && size <= 32)) {
+		/* Constraint check succeeded */
+		return 0;
+	} else {
+		ASN__CTFAIL(app_key, td, sptr,
+			"%s: constraint failed (%s:%d)",
+			td->name, __FILE__, __LINE__);
+		return -1;
+	}
+}
+
+static asn_oer_constraints_t asn_OER_memb_en_gNB_ID_constr_2 CC_NOTUSED = {
+	{ 0, 0 },
+	-1	/* (SIZE(22..32)) */};
+static asn_per_constraints_t asn_PER_memb_en_gNB_ID_constr_2 CC_NOTUSED = {
+	{ APC_UNCONSTRAINED,	-1, -1,  0,  0 },
+	{ APC_CONSTRAINED,	 4,  4,  22,  32 }	/* (SIZE(22..32)) */,
+	0, 0	/* No PER value map */
+};
+static asn_oer_constraints_t asn_OER_type_EN_GNB_ID_constr_1 CC_NOTUSED = {
+	{ 0, 0 },
+	-1};
+asn_per_constraints_t asn_PER_type_EN_GNB_ID_constr_1 CC_NOTUSED = {
+	{ APC_CONSTRAINED | APC_EXTENSIBLE,  0,  0,  0,  0 }	/* (0..0,...) */,
+	{ APC_UNCONSTRAINED,	-1, -1,  0,  0 },
+	0, 0	/* No PER value map */
+};
+asn_TYPE_member_t asn_MBR_EN_GNB_ID_1[] = {
+	{ ATF_NOFLAGS, 0, offsetof(struct EN_GNB_ID, choice.en_gNB_ID),
+		(ASN_TAG_CLASS_CONTEXT | (0 << 2)),
+		-1,	/* IMPLICIT tag at current level */
+		&asn_DEF_BIT_STRING,
+		0,
+		{ &asn_OER_memb_en_gNB_ID_constr_2, &asn_PER_memb_en_gNB_ID_constr_2,  memb_en_gNB_ID_constraint_1 },
+		0, 0, /* No default value */
+		"en-gNB-ID"
+		},
+};
+static const asn_TYPE_tag2member_t asn_MAP_EN_GNB_ID_tag2el_1[] = {
+    { (ASN_TAG_CLASS_CONTEXT | (0 << 2)), 0, 0, 0 } /* en-gNB-ID */
+};
+asn_CHOICE_specifics_t asn_SPC_EN_GNB_ID_specs_1 = {
+	sizeof(struct EN_GNB_ID),
+	offsetof(struct EN_GNB_ID, _asn_ctx),
+	offsetof(struct EN_GNB_ID, present),
+	sizeof(((struct EN_GNB_ID *)0)->present),
+	asn_MAP_EN_GNB_ID_tag2el_1,
+	1,	/* Count of tags in the map */
+	0, 0,
+	1	/* Extensions start */
+};
+asn_TYPE_descriptor_t asn_DEF_EN_GNB_ID = {
+	"EN-GNB-ID",
+	"EN-GNB-ID",
+	&asn_OP_CHOICE,
+	0,	/* No effective tags (pointer) */
+	0,	/* No effective tags (count) */
+	0,	/* No tags (pointer) */
+	0,	/* No tags (count) */
+	{ &asn_OER_type_EN_GNB_ID_constr_1, &asn_PER_type_EN_GNB_ID_constr_1, CHOICE_constraint },
+	asn_MBR_EN_GNB_ID_1,
+	1,	/* Elements count */
+	&asn_SPC_EN_GNB_ID_specs_1	/* Additional specs */
+};
+