Service Intelligent™ architecture
Bharat T. Doshi · Bell Labs Technical Journal · 2003
In the latter part of the last decade, we saw tremendous growth in the communications infrastructure at all levels of networking in the backbone. In particular, the deployed capacity in long-haul transport increased many fold as a result of unprecedented fiber deployment, the advent of DWDM with many tens of wavelengths per fiber, and increased bit rate per wavelength. We also saw deployment of cross connects with many hundred Gb/s to Tb/s capacity. These together allowed tremendous growth in the capacity to deliver high-speed private line services and in the trunking capacity between IP routers, ATM switches, and voice switches. The capacity of a single core router increased several fold to a few hundred Gb/s. The next phase of network evolution naturally involves deploying more capacity in access and creating new services that will use the end-to-end infrastructure capacity to enhance business productivity, add exciting entertainment, and assist in personal chores. Service innovations are key to fulfilling the promise of communication networks as the catalyst for fundamental changes in lifestyle.