Embed Size (px)
DESCRIPTION
The Importance Of Continued Interoperability Testing In A Standardized IMS Network. Pierre Lynch Director, IMS and Wireless Strategy, Ixia. Introduction. What makes IMS special? Motivations Testing Methodologies Summary. AS. SCIM. PSTN. S-CSCF. I-CSCF. P-CSCF. PDF. HSS. AS. AS. - PowerPoint PPT Presentation
Citation preview
The Importance Of Continued Interoperability Testing In A Standardized IMS Network
Pierre LynchDirector, IMS and Wireless Strategy, Ixia
Introduction
• What makes IMS special? • Motivations• Testing Methodologies• Summary
ASASAS
S-CSCF
I-CSCF
P-CSCF
SCIM
BGCF
MGCF
MGWPDF
HSS
MRFC
MRFP
MRFC
Application Layer
Control Layer
Transport Layer
IP CAN
PSTN
Distributed Architecture
Data
• Migration• Location and multiplicity
– IMS and Non-IMS services– Centralized vs Non Centralized
• Maintenance– changes
X-CSCF
AS
AS
AS
HSS
Cx
Sh
ISC
DDoS
Spoofing
Eavesdropping
Virus
Theft of S
erviceIdentity and InfoTheft
Authentication/AKAIPSec and TLS
Resource and Admission ControlSLA Enforcement
Za Interface...
Security
Security
• Multiple levels– Application– Transport– Access– Authentication
• Specs address some aspects, but not all– AKA and IPSec– SEG– RACS
• Other Stds Bodies have added to 3GPP security– TISPAN– PacketCable
Resource and Admission Control
• Extremely important aspect of NGN• Standards Bodies adopted different
mechanisms• Policies must be synchronized with
applications
AccessNetwork
QoS
Managed
Managed
?
• Unknown QoS in some access networks• Mechanisms within own core network
Home
Away
SIP Interoperability
• Varying degrees of conformance• Sill much discussion on interoperability• Evolving constantly• Mobility -> the Ultimate Interop Challenge
Dependencies
AccessNetwork
• SEG• Network Address
Translation• Protocol translation
Testing Methods
• At the Edges– As much real equipment as possible– Simulate the rest
AccessNetwork
Internet
Other IMS
PSTN
Internet
AN + UEsPSTN
Other IMS
UEs
Testing Methods
• QoS Evaluation– Transport Level– Referential– Impairments
• Security Testing– DDOS– Spoofing– Virus
• RACS Testing– Overload– Control signaling bombing
• Dependencies– Regression
• Interoperability– Regression– Develop tests with multiple SIP profiles for mobility
Summary
• Motivations– Distributed Architecture– Multi-Vendor Solutions– Data Migration– Multiple Impacts of Changes– Dependencies introduced by units
• Testing– Test all changes– Periodic frequent regression– Automated and unattended– Include media and OoS– If Mobile, test multiple UE profiles
