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The Importance Of Continued Interoperability Testing In A Standardized IMS Network

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.

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The Importance Of Continued Interoperability Testing In A Standardized IMS Network

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  1. The Importance Of Continued Interoperability Testing In A Standardized IMS Network Pierre Lynch Director, IMS and Wireless Strategy, Ixia

  2. Introduction • What makes IMS special? • Motivations • Testing Methodologies • Summary

  3. AS SCIM PSTN S-CSCF I-CSCF P-CSCF PDF HSS AS AS MGCF MRFC MRFP MGW BGCF MRFC Distributed Architecture Application Layer Control Layer Transport Layer IP CAN

  4. Data • Migration • Location and multiplicity • IMS and Non-IMS services • Centralized vs Non Centralized • Maintenance • changes AS Sh AS HSS Cx AS ISC X-CSCF

  5. Spoofing DDoS Virus Authentication/AKA IPSec and TLS Resource and Admission Control SLA Enforcement Za Interface . . . Theft of Service Eavesdropping Identity and InfoTheft Security

  6. 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

  7. Access Network PDF Resource and Admission Control • Extremely important aspect of NGN • Standards Bodies adopted different mechanisms • Policies must be synchronized with applications

  8. QoS • Unknown QoS in some access networks • Mechanisms within own core network Managed ? Managed

  9. SIP Interoperability • Varying degrees of conformance • Sill much discussion on interoperability • Evolving constantly • Mobility -> the Ultimate Interop Challenge Away Home

  10. Dependencies • SEG • Network Address Translation • Protocol translation Access Network

  11. Internet Access Network PSTN Testing Methods • At the Edges • As much real equipment as possible • Simulate the rest Other IMS Other IMS Internet PSTN UEs AN + UEs

  12. 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

  13. 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

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