What are the top 10 technical challenges with IMS?
1. Security 2. Integrating SIP and non-SIP applications 3. Vendor interoperability 4. Carrier interoperability 5. Standards readiness 6. Mapping standards to product profiles 7. Measuring the customers QoE 8. OSS/BSS 9. General complexity 10. The unknowns 1. Security: With IMS, every SIP-based terminal is a source of network attack. For IMS networks to be secure, service procedures will have to support reverse firewalls. For example, even if Verizon Wireless solves this problem with its A-IMS, there are bound to be other security holes. 2. Integrating SIP and non-SIP applications: Other than the Internet and enterprise intranets, there is no end-to-end IP networking application creating a revenue stream. Non-SIP applications will be driving most of the tier 1s revenue for the next 10 years or so. The challenge will be to make the user experience (applications) seamless across SIP and non-SIP infrastructure. 3. Vendor interoperability: Vendors love being sole-source suppliers, and tier
