LTE Conformance Test Suite

15^th, Nov 2019

Welcome to another issue of GL Communications' Newsletter providing information and insight into our MAPS™ LTE Conformance Test Suite that tests the conformance of LTE S1 and LTE X2 interfaces in the LTE network (eNodeB, MME) per 3GPP standards.

Overview

GL's MAPS™ LTE Conformance Test Suite is designed with 50+ test cases, as per 3GPP TS 36.413 (LTE S1) and TS 36.423 (LTE X2) specifications. It includes inbuilt conformance scripts (*.gls) for eNodeB conformance, MME conformance in S1 interface, and multiple eNodeB’s in X2 interface as per 3GPP standards.

Test cases include general Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP) and X2 Application Protocol (X2AP) messaging and call flow scenarios over LTE network. Logging and pass/fail results are also reported. Test cases verify conformance of actions such as UE attach/detach, periodic updating, E-RAB setup, X2 setup, Handover procedure, UE context release, and error indication.

LTE S1 Interface Conformance Testing

MAPS™ LTE S1 emulator can be configured as MME with a conformance script to simulate various network side procedures conforming various success/failure test cases and automating the entire eNodeB (DUT) testing.

Supported Test Cases

• Paging success/failure
• Paging via IMSI success/failure
• UE attach success, UE detach, UE tracking area update
• Periodic updating
• Service Request
• E-RAB Setup procedures
• GBR E-RAB setup success
• Non GBR E-RAB setup success
• E-RAB setup failure
• E-RAB release
• E-RAB Modify - priority trigger, QCI changes, UE AMBR
• E-RAB Modify failure
• Setup context – Fail, Success
• UE Context Release, Modification
• Handover
• Success Handover S1 interface
• Handover prepare failure
• Handover resource allocation failure
• Handover failed: Multiple E-RAB ID instances
• Handover Cancel
• S1 Setup
• S1 Setup Success
• setup failure and resend setup
• Reset all resource, partial resource
• Error Indication
• Location report

LTE X2 Interface Conformance Testing

MAPS™ LTE X2 emulator can be configured as Source eNodeB connected to DUT (Target eNodeB). The conformance script can simulate various procedures conforming success/failure test cases and automating the entire Target eNodeB (DUT) testing.

Supported Test Cases

• Handover Test Case
• Handover success
• Handover failure (invalid GTP-TEID, duplicated E-RAB ID)
• Load Indication (send load to and receive load from target eNodeB)
• Error Indication (send error to and receive error from target eNodeB)
• X2 Setup
• X2 Setup Success
• Setup failure and resend setup
• Configuration update
• Send/receive configuration update
• Configure update success after re-send
• Resend Configuration update after failure

Important Features

• Setup a virtual real-time network simulating 4G-LTE network elements using ‘MAPS™ 4G Wireless Lab Suite’
• Simulates eNodeB and MME in LTE S1 interface and two eNodeB elements in LTE X2-AP interface
• Supports LTE Control plane
• Generates hundreds of UE Signaling (Load Testing)
• Generates and process S1/NAS, X2-AP (valid and invalid) messages
• Supports GTP Traffic (GTP User Plane Data) which includes verification like HTTP traffic generation capability, GGSN/PGW can be connected to real IP network to simulate Gateway testing
• Supports Mobility Management, Load Management, Reporting of General Error Situations, Re-setting X2, Setting up the X2, and eNodeB Configuration Update procedures
• Customize call flow and message templates using Script and Message Editor
• Ready-to-use scripts for quick testing
• Scripted call generation and automated call reception
• Script based & protocol independent software architecture
• Provides call statistics and events status
• Automation, Remote access, and Schedulers to run tests 24/7

For comprehensive information, please refer to the MAPS™ LTE for S1 Interface Emulator and MAPS™ LTE for X2 Interface Emulator web pages.

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