IMS is something many service providers need but the complexity of implementing IP multimedia subsystem solutions has certainly been a cause for operators to deploy such solutions more slowly than some would have hoped. Beyond complexity, another factor which needs to be overcome is interoperability between disparate vendor’s systems.
For this reason a number of organizations such as the IMS Forum have been focusing on plugfests
to ensure IMS vendor A can interoperate seamlessly with vendor B and C.
The need for interoperability is not lost of companies like Tekelec
and HP who began collaborating last year and more recently made an announcement that their respective platforms will work together.
Specifically the companies have aligned the roadmaps of the Tekelec TekCore Session Manager, a CSCF platform and HP OpenCall home subscriber server or HSS.
The solution includes IMS core network infrastructure, service enablers, operational and business support system linkages and application service offerings that enable the delivery of subscriber-centric services across wireless, wireline and broadband networks.
The IMS core network elements in the solution include the following:
· Call state control function (CSCF) and home subscriber server (HSS)
· Service enablers such as the media resource function (MRF), presence server, electronic numbering (ENUM), group list management and voice call continuity (VCC) platforms
· Multimedia applications such as enhanced voice services, instant messaging (IM) and multimedia content sharing (e.g., "see what I see")
· Integration with back-office and legacy systems.
The companies explain that convergence cannot happen in a vacuum but instead needs a convergence framework which requires a good deal of planning. In addition they feel such a framework needs to address:
1) A unified signaling and control infrastructure that unites signaling and control procedures across multiple network types. Furthermore, this is a prerequisite to enable uniform access to applications and services across heterogeneous networks.
2) Providing a real-time unified view of the customer.