lte ue testing - ttcn-3 nov 2009... · 2 ttcn -3 for lte device protocol conformance ... long term...
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LTE UE Testing
© 2009 Wipro Ltd - Confidential
Agenda
1 Application areas of TTCN-3
2 TTCN-3 for LTE Device Protocol Conformance
© 2009 Wipro Ltd - Confidential2 © 2009 Wipro Ltd - Confidential2
2 TTCN-3 for LTE Device Protocol Conformance
3 TTCN-3 for LTE Device Pre-IOT
Long Term Evolution (LTE) – A brief Introduction
About� Latest standards in mobile network technology promoted by 3GPP� Promises a competitive edge over other cellular technologies� Designed to support High-speed data
� Increase Peak Data Rates ( 100Mbps in Downlink & 50 Mbps in Uplink )
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Goals
� Increase Peak Data Rates ( 100Mbps in Downlink & 50 Mbps in Uplink ) � Improve Spectral Efficiency� Increase Network Capacity� Reduce Latency� Better support for Mobility (up to 120 Km/hr)
Features
� Multiple Access Scheme based on OFDMA in Downlink� MIMO technology for better data rate & performance� Hybrid ARQ in MAC layer� Bandwidth scalability� Adaptive Modulation Techniques
LTE UE Testing Landscape
Market Segments• Device Vendors
• Test and Measurement Vendors• Protocol Stack Developers
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LTE Test Challenges•Constantly evolving Protocol Specifications
•Frequently Changing Conformance Specifications
•Shorter Time to Market•Testing Complexity is Very High
Device Testing Life Cycle
Interoperability
Testing
Pre-IOT Testing
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Interoperability Test Lab
Interoperability
Test Lab
Conformance
Test Lab
Conformance
Testing
Pre-IOT
Applicability of TTCN-3
Conformance
Integration
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Banking
System
Unit
Module
Automotive Embedded Telecom
Test Domain
LTE Device Conformance Testing
TTCN-3 Test System UE
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RF
UE Conformance Test Architecture – 3GPP Proposed
TTCN-3
generated codeCodec
Test control, Logging
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Host-PC
generated code
System Adaptor (SA)
Platform Adaptor (PA)
System dependent
layers
System Simulator HW
internal interface
UESystem
dependent
layers
Protocol layers
internal interface air interface
TTCN-3 Port Mappings defined by 3GPP
MTCE
_u
t E-UTRA(PTC)
UT
NA
SCT
RL
SRB
NASEmu (PTC)
CT
RL
TC
_SR
B© 2009 Wipro Ltd - Confidential9 © 2009 Wipro Ltd - Confidential9
Ut
TEST SYSTEM INTERFACE (TSI)
ut E_DRB
SYS SYSIND DRB
SYS_SRB
TC
_SR
B
E_SRBE_SYS E_SYSIND
Pre-IOT Testing - Why is it Required?
TTCN-3 Test System UE
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RF
Applicability of TTCN-3 to Pre-IOT Testing
Test case Logging & Verdict Management
Capabilities are Inherently supported
By TTCN-3 based
Message Templates from
3GPP Conformance Test Suite can be
Re-used
TTCN-3 offers astandardized automation
Test Bed for Pre-IOT
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Benefits of usingTTCN-3 for
Pre-IOT Testing
Benefits of usingTTCN-3 for
Pre-IOT Testing
By TTCN-3 basedTest Systems
TTCN-3 supports Easy Integration to
3rd Party Test Management
Solution
3GPP Conformance Test Architecture Can be re-used to design the
Pre-IOT Test Suite
3GPP Conformance Test Architecture Can be re-used to design the
Pre-IOT Test Suite
Procedure librariesCan be created in
TTCN-3 to facilitateRapid creation of
Test Scenarios
Re-used
TTCN-3 for Device Pre-IOT
LTE IOT NetworkLTE Pre-IOT Test Setup
Test Control
Pre-IOT Test Suite
Wipro Test FrameworkS 6a
MME HSS
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Adaptation Layer
PDCP
RLC
MAC
PHY
SS HW
RF
S 7
S Gi
S 5Serving
GW
PDN
GW
NME/NMS
SystemPCRF
InterneteNodeB
Building TTCN-3 Message Library
Test System UE
RRC Connection Request
RRC Connection Setup
RRC Connection Setup Complete
RRC_Conn_Est_Success
TTCN-3 Procedure Library
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RRC: DL Information Transfer
RRC: UL Information Transfer
(NAS: Authentication)
(NAS: Authentication Response)
RRC: DL Information Transfer
RRC: UL Information Transfer
(NAS: SecurityModeCommand)
(NAS: SecurityModeComplete)
NAS_Auth_Success
NAS_Security_Success
Building Test Case from TTCN-3 Message Library
Test System UE
RRC_Conn_Est_Success
Create PIXIT File
Pre-IOT Test Case
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Preamble
(Registration)
Test Body RRC_Conn_Reestablish_Success
NAS_Auth_Success
NAS_Security_Success
Pre-IOT Test Case built from TTCN-3
Message library
