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diff --git a/e2sim/e2apv1sim/ricsim/src/ASN1/asn/per/sequence_of.hpp b/e2sim/e2apv1sim/ricsim/src/ASN1/asn/per/sequence_of.hpp
new file mode 100755
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--- /dev/null
+++ b/e2sim/e2apv1sim/ricsim/src/ASN1/asn/per/sequence_of.hpp
@@ -0,0 +1,156 @@
+#pragma once
+/******************************************************************************
+*
+*   Copyright (c) 2019 AT&T Intellectual Property.
+*   Copyright (c) 2018-2019 Nokia.
+*
+*   Licensed under the Apache License, Version 2.0 (the "License");
+*   you may not use this file except in compliance with the License.
+*   You may obtain a copy of the License at
+*
+*       http://www.apache.org/licenses/LICENSE-2.0
+*
+*   Unless required by applicable law or agreed to in writing, software
+*   distributed under the License is distributed on an "AS IS" BASIS,
+*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*   See the License for the specific language governing permissions and
+*   limitations under the License.
+*
+******************************************************************************/
+
+// Standard Includes: ANSI C/C++, MSA, and Third-Party Libraries
+
+// Local Includes: Application specific classes, functions, and libraries
+#include "asn/per/common.hpp"
+
+namespace asn {
+namespace per {
+
+template <class IE, class Enable = void>
+struct SequenceOf;
+
+//19.6 Default
+template <class IE, class Enabler = void>
+struct SequenceOfNoExt
+{
+	static void inline run(IE const& ie, EncoderCtx& ctx)
+	{
+		LengthDeterminant<typename IE::constraint_t>::run(ctx, ie.size());
+	}
+	static void inline run(IE& ie, DecoderCtx& ctx)
+	{
+		size_t len = LengthDeterminant<typename IE::constraint_t>::run(ctx, false);
+		for (size_t i = 0; i < len; ++i)
+		{
+			u8* data = ctx.refAllocator().alloc_bytes(sizeof(typename IE::value_type));
+			if (data)
+			{
+				typename IE::value_type * v = new (data) typename IE::value_type;
+				v->clear();
+				ie.push_back(*v);
+			}
+			else
+			{
+				ctx.refErrorCtx().allocatorNoMem(0, sizeof(typename IE::value_type));
+				break;
+			}
+		}
+	}
+};
+
+//16.6 
+template <class IE>
+struct SequenceOfNoExt<IE, std::enable_if_t<
+	((IE::constraint_t::upper_bound == IE::constraint_t::lower_bound) && (IE::constraint_t::upper_bound < 65536))
+>>
+{
+	static void inline run(IE const& ie, EncoderCtx& ctx) {/*do nothing*/ }
+	static void inline run(IE& ie, DecoderCtx& ctx)
+	{
+		for (size_t i = 0; i < IE::constraint_t::upper_bound; ++i)
+		{
+			u8* data = ctx.refAllocator().alloc_bytes(sizeof(typename IE::value_type));
+			if (data)
+			{
+				typename IE::value_type * v = new (data) typename IE::value_type;
+				v->clear();
+				ie.push_back(*v);
+			}
+			else
+			{
+				ctx.refErrorCtx().allocatorNoMem(0, sizeof(typename IE::value_type));
+				break;
+			}
+		}
+	}
+};
+
+/**************************************************/
+
+//19.4 Extension present
+template <class IE>
+struct SequenceOf<IE, std::enable_if_t<	(IE::constraint_t::extended == true)> >
+{
+	static void inline run(IE const& ie, EncoderCtx& ctx)
+	{
+		if (ie.size() <= IE::constraint_t::upper_bound && ie.size() >= IE::constraint_t::lower_bound)
+		{
+			Tools::bit_accessor::put(0, 1, ctx.refBuffer());
+			SequenceOfNoExt<IE>::run(ie, ctx);
+		}
+		else
+		{
+			Tools::bit_accessor::put(1, 1, ctx.refBuffer());
+			LengthDeterminant<typename IE::constraint_t>::run(ctx, ie.size());
+		}
+	}
+	static void inline run(IE& ie, DecoderCtx& ctx)
+	{
+		u8 ext = Tools::bit_accessor::get(1, ctx.refBuffer());
+		if (ext)
+		{
+			size_t len = LengthDeterminant<typename IE::constraint_t>::run(ctx, true);
+			for (size_t i = 0; i < len; ++i)
+			{
+				u8* data = ctx.refAllocator().alloc_bytes(sizeof(typename IE::value_type));
+				if (data)
+				{
+					typename IE::value_type * v = new (data) typename IE::value_type;
+					//v->clear();
+					ie.push_back(*v);
+				}
+				else
+				{
+					ctx.refErrorCtx().allocatorNoMem(0, sizeof(typename IE::value_type));
+					break;
+				}
+			}
+		}
+		else
+			SequenceOfNoExt<IE>::run(ie, ctx);
+	}
+};
+
+//19.5-6 No extension
+template <class IE>
+struct SequenceOf<IE, std::enable_if_t<	(IE::constraint_t::extended == false)> >
+{
+	static void inline run(IE const& ie, EncoderCtx& ctx)
+	{
+		if (IE::constraint_t::lower_bound >= 0 && ie.size() < size_t(IE::constraint_t::lower_bound))
+		{
+			ctx.refErrorCtx().sizeRangeError(ie.size(), size_t(IE::constraint_t::lower_bound));
+		}
+		else
+		{
+			SequenceOfNoExt<IE>::run(ie, ctx);
+		}
+	}
+	static void inline run(IE& ie, DecoderCtx& ctx)
+	{
+		SequenceOfNoExt<IE>::run(ie, ctx);
+	}
+};
+
+} //namespace per
+} //namespace asn