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IP Multimedia Subsystem (IMS)

IMS is rapidly becoming the de facto service delivery architecture for fixed, wireless, and cable networks. IMS networks tend to be very diverse and complex because each implementation requires MANY different types of network equipment and dozens of protocols across a wide variety of deployment scenarios.

• IMS Case Study (download Full Study PDF)
• IMS Forum & Mu Whitepaper: Building Reliable, Available & Secure IMS Service Provider Networks (PDF)
• Securing IMS Applications, Networks and Infrastructure Products: IMS Forum Q&A Interview with Mu

Case Study

One major international service provider is well on its way to reaping the rewards of IMS. It understands firsthand that the immaturity and inherent complexity of IMS create ample opportunities for availability and reliability issues. This Tier 1 service provider is piloting IMS-based services, including VoIP, presence and other advanced applications. Based on the success of its pilot, an aggressive schedule is underway for interactive push-to-talk, multimedia conferencing and other multimedia applications.

• Capture new revenue opportunities and reduce operational costs by transitioning to next-generation network architecture and IMS
• Offer VoIP, presence-based applications, multimedia conferencing and other advanced services that are reliable, available and secure
• Identify and eliminate sources of potential service degradations before they impact the customer experience and service-level agreements
• Select high-quality IMS products, including multiple implementations of the Session Initiation Protocol (SIP), from a wide spectrum of vendors while delivering a stable service to subscribers free from service-affecting weaknesses that may result in downtime

• Met service availability requirements for VoIP and rich media applications;
• Met aggressive rollout schedule for IMS applications and pilot of next-generation network architecture;
• Work on every IMS Forum PlugFest to verify that IMS products are free from security or reliability weaknesses before products are purchased and deployed into the production network;
• Automated and conducted comprehensive testing of highly complex IMS applications and equipment, and integrated into regression testing across the whole development and deployment life cycle

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