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+---
+Author: Timea Moder
+Version: 1551-CNL 113 870, Rev. PB1
+Date: 2018-08-03
+---
+= GTPv2 v15.2.0 Protocol Modules for TTCN-3 Toolset with Titan, Description
+:author: Timea Moder
+:revnumber: 1551-CNL 113 870, Rev. PB1
+:revdate: 2018-08-03
+:toc:
+
+*Abstract*
+
+This is the description for the GTPv2 v15.2.0 protocol module. The GTPv2 v15.2.0 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 GTPv2 v15.2.0 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 GTPv2 v15.2.0 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 GTPv2 v15.2.0 protocol as described <<_5,here>>.
+
+=== Modified and non-implemented Protocol Elements
+
+None.
+
+=== Ericsson-specific changes
+
+The Ericsson Private Extensions are defined <<_6,here>>.
+
+== Backward incompatibilities
+
+None.
+
+== 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 113 200/6 R3A (6.3.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 113 200/6 R3A.
+
+= 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 GTPv2 v15.2.0 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_GTPCv2.
+
+[[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
+[options="header"]
+|===
+|Name |Type of formal parameters |Type of return value
+|`enc_PDU_GTPCv2` |in PDU_GTPCv2 |octetstring
+|`dec_PDU_GTPCv2` |in octetstring |PDU_GTPCv2
+|`dec_PDU_GTPCv2_backtrack`| in octetstring, out PDU_GTPCv2| integer
+|`dec_PDU_GTPCv2_fast`| in octetstring, out PDU_GTPCv2 |integer
+|===
+
+= Terminology
+
+== Abbreviations
+
+PDU:: Protocol Data Unit
+
+GTPv2:: GPRS Tunnelling Protocol version 2
+
+TTCN-3:: Testing and Test Control Notation version 3
+
+= References
+
+1. [[_1]]ETSI ES 201 873-1 v4.5.1 (2013-04) +
+The Testing and Test Control Notation version 3. Part 1: Core Language
+
+2. [[_2]]link:https://github.com/eclipse/titan.core/blob/master/usrguide/userguide[1/ 198 17-CRL 113 200/6] Uen +
+User Guide for TITAN TTCN-3 Test Executor
+
+3. [[_3]]109 21-CNL 113 870-1 +
+GTPv2 v15.2.0 Protocol Modules for TTCN-3 Toolset with Titan Product Revision Information
+
+4. [[_4]]link:https://github.com/eclipse/titan.core/blob/master/usrguide/referenceguide[2/198 17-CRL 113 200/6] Uen +
+Programmer’s Technical Reference for Titan TTCN–3 Test Executor
+
+5. [[_5]]3GPP TS 29.274 v15.2.0 (2017-12) +
+3rd Generation Partnership Project; Technical Specification Group Core Network and Terminals; 3GPP Evolved Packet System (EPS);Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C);Stage 3 (Release 15)
+
+6. [[_6]]12/155 19-AXB 250 05 Uen Rev PK4 +
+SGSN-MME Private Extensions under IANA Enterprise number 10923
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diff --git a/doc/GTPv2_v15.2.0_CNL113870_PRI.adoc b/doc/GTPv2_v15.2.0_CNL113870_PRI.adoc
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+---
+Author: Jenő Balaskó
+Version: 109 21-CNL 113 870-2, Rev. PA1
+Date: 2018-08-03
+---
+= GTPv2 (v15.2.0) Protocol Modules for TTCN-3 Toolset with TITAN, Product Revision Information
+:author: Jenő Balaskó
+:revnumber: 109 21-CNL 113 870-2, Rev. PA1
+:revdate: 2018-08-03
+:toc:
+
+= Product Revision
+
+== Product
+
+|===
+|Old Product number:| CNL 113 870| R1E
+|New Product number:| CNL 113 870| R2A
+|===
+
+== Included Parts
+
+=== Source Code
+
+[source]
+GTPv2_Types.ttcn
+
+=== TPD file
+
+[source]
+GTPv2_v15.2.0_CNL113870.tpd
+
+=== Documentation
+
+==== Description
+
+[cols="50%,30%,20%",options="header",]
+|===
+|Document Name |Document Number | Revision
+|GTPv2 (v15.2.0) Protocol Modules for TTCN-3 Toolset with TITAN,Description |1551-CNL 113 870 | A
+|===
+
+== Product Dependencies
+
+This product is based on the following products or parts of products:
+
+[cols="50%,50%",options="header",]
+|===
+|Product Number |Product name/File name
+|CNL 113 368 R9B or newer |COMMON protocol module General_Types.ttcn
+|CNL 113 798 R6B or newer |GTPv2_PrivateExtensions
+|===
+
+= Reason for Revision
+
+== Requirement Specification
+
+== Change Requests
+
+[cols="50%,50%",options="header",]
+|===
+| CR ID| Description
+|===
+
+== Exemption Requests
+
+None.
+
+== Trouble Reports
+
+Trouble reports received until 2018-08-03.
+
+=== Implemented Trouble Reports
+
+[cols="30%,70%",options="header",]
+|===
+| TR ID| Trouble Effect
+|link:https://openalm.lmera.ericsson.se/plugins/tracker/?aid=1536266[support #1536266]| SCEF PDN Connection can be used multiple times in `ForwardRelocationRequest` and in `ContextResponse` messages
+|===
+
+=== Not Implemented Trouble Reports
+
+[cols="50%,50%",options="header",]
+|===
+| TR ID| Trouble Effect
+|===
+
+= Product Changes
+
+== R1A
+
+Initial version triggered by the change request № link:https://openalm.lmera.ericsson.se/plugins/tracker/?aid=1457273[1457273].
+
+== R1B
+
+Two optional fields of PDU_GTPCv2 record, `spare4` and `messagePriority`, are changed to mandatory field `messagePriorityOrSpare`.
+
+OpenALM № link:https://openalm.lmera.ericsson.se/plugins/tracker/?aid=1457273[1457273]
+
+== R1C
+
+TR link:https://openalm.lmera.ericsson.se/plugins/tracker/?aid=1536266[support #1536266] was implemented.
+
+== R1D
+
+The `pDN_Connection` field changed to optional in `ForwardRelocationRequest` type.
+
+== R1E
+
+In several message types the following field types changed to list: `PresenceReportingAreaAction`, `PresenceReportingAreaInformation` and `Secondary_RAT_Usage_Data_Report`, as several from this IEs with the same type and instance value may be included to represent multiple usage data reports.
+
+== R2A
+
+Prepared to be open source. Behavior unchanged.
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