This BLOG post is the third, and last, in a series of short articles on the changes in BSS and OSS architectures arising from the changing underlying data communications, middleware, and data modeling software technology. In the last posting, I described how IP and middleware dropped the cost and complexity of integration by an order of magnitude.
About the turn of the century, a new concept (which was really an old concept) appeared on the software scene - what became known as Service Oriented Architecture (SOA). The concept is simple - design software so that the functionality is not only available to a human via its associated user interface, but to another system via a simple, stable interface. In reality, the concept is very similar to the time-honoured remote procedure calls (RPC) of yesteryear (send in some data and define what predefined procedure you want to run, and then get a response). And the interface became to be based on human-readable code - XML (eXtensible Markup Language). But more importantly, the SOA model meant having a design goal of not breaking the interface with later generics (there also are some technical aspects of the interface that makes it easier to add data elements without breaking the interface).
When SOA is combined with the use of a standard meta-model for the data, it becomes even more useful. And when even more specificity is supplied, as in the use of the TMF's Shared Information and Data (SID) model, interfaces become even easier to build and maintain. The SID has been used by many OSS and BSS system vendors and is the preferred data model for nearly all systems integrators and ISVs.
These innovations of the past three decades have brought the cost of interfacing modern software systems from large fractions of a million dollars to a few tens of thousands of dollars and enabled multi-system architectures and automatic flow-through of information, orders, and network control unheard of when I first began my career.
Will this revolution cause the industry to move away from the current "best of suite" architectures, provided bydo-it-all vendors such as Amdocs and Oracle, and towards best-of-breed architectures? Perhaps. It certainly provides some new options and gives the systems integrators, whose influence in BSS/OSS architectures has waned in the last five years, a new set of systems to put into their preferred suites.
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