---
Author: Gábor Szalai
Version: 1551-CNL 113 875, Rev. B
Date: 2018-06-14
---
= PFCP v15.1.0 Protocol Modules for TTCN-3 Toolset with Titan, Description
:author: Gábor Szalai
:revnumber: 1551-CNL 113 875, Rev. B
:revdate: 2018-06-14
:toc:

*Abstract*

This is the description for the PFCP v15.1.0 protocol module. The PFCP v15.1.0 protocol modules are developed for the TTCN-3 Toolset with Titan. This document should be read together with the <<_3,Product Revision Information>>.

= Functionality

The PFCP v15.1.0 protocol module implements the message structures of the <<_5,related protocol>> in a formalized way, using the standard specification language, TTCN-3. This allows defining of test data (templates) in the TTCN-3 language and correctly encoding/decoding messages when executing test suites using the Titan TTCN-3 test environment.

The PFCP v15.1.0 protocol module uses <<_4,Titan’s RAW encoding attributes>> and hence is usable with the Titan test toolset only.

== Implemented protocols

This set of protocol modules implements protocol messages and constants of the PFCP v15.1.0 protocol as described <<_5,here>>.

=== Modified and non-implemented Protocol Elements

None.

=== Ericsson-specific changes

The previously added F_SEID was removed from the `Sx_Session_Deletion_Request` message.

== Backward incompatibilities

The standard renamed the Sx_ prefix to PFCP, so all Sx prefix was changed to PFCP in the protocol module too.

== System Requirements

Protocol modules are a set of TTCN-3 source code files that can be used as part of TTCN-3 test suites only. Hence, protocol modules alone do not put specific requirements on the system used. However, in order to compile and execute a TTCN-3 test suite using the set of protocol modules, the following system requirements must be satisfied:

* Titan TTCN-3 Test Executor version CRL 113 200/5 R4A (5.3.pl0) or higher installed. For Installation Guide, see <<_2,here>>.

NOTE: This version of the test port is not compatible with Titan releases earlier than CRL 113 200/5 R4A.

= Usage

== Installation

The set of protocol modules can be used in developing TTCN-3 test suites using any text editor; however, to make the work more efficient, a TTCN-3-enabled text editor is recommended (for example nedit, xemacs). Since the PFCP v15.1.0 protocol is used as a part of a TTCN-3 test suite, this requires TTCN-3 Test Executor to be installed before the module can be compiled and executed together with other parts of the test suite. For more details on the installation of TTCN-3 Test Executor, see the relevant section of <<_2,User Guide for TITAN TTCN-3 Test Executor>>.

== Configuration

None.

== Examples

None.

= Interface description

== Top Level PDU

The top level PDUs are the TTCN-3 records PDU_PFCP.

[[encoding-decoding-and-other-related-functions]]
== Encoding/decoding and other related functions

This product also contains encoding/decoding functions, which assure correct encoding of messages when sent from Titan and correct decoding of messages when received by Titan.

=== Implemented encoding and decoding functions

[width="100%",cols="34%,33%,33%",options="header",]
|===
|Name |Type of formal parameters |Type of return value
|`enc_PDU_PFCP`| in PDU_PFCP |octetstring

|`dec_PDU_PFCP`| in octetstring |PDU_PFCP

|`dec_PDU_PFCP_backtrack` |in octetstring, out PDU_PFCP |integer

|`dec_PDU_PFCP_fast` |in octetstring, out PDU_PFCP |integer
|===

= Terminology

== Abbreviations

PDU:: Protocol Data Unit

PFCP:: Packet Forwarding Control Protocol

TTCN-3:: Testing and Test Control Notation version 3

= References

1. [[_1]]ETSI ES 201 873-1 v4.4.1 (2012-04) +
The Testing and Test Control Notation version 3. Part 1: Core Language

2. [[_2]]1/ 198 17-CRL 113 200/6 Uen +
User Guide for TITAN TTCN-3 Test Executor

3. [[_3]]109 21-CNL 113 852-1 +
PFCP v15.1.0 Protocol Modules for TTCN-3 Toolset with Titan Product Revision Information

4. [[_4]]2/198 17-CRL 113 200/6 Uen +
Programmer’s Technical Reference for Titan TTCN–3 Test Executor

5. [[_5]]3GPP TS 29.244 v15.1.0 +
3rd Generation Partnership Project; Technical Specification Group Core Network and Terminals; Interface between the Control Plane and the User Plane of EPC Nodes; Stage 3 (Release 15)