Invited Talk

Where and How Telecommunication Carriers Provide Network Restoration

Robert Doverspike

Robert Doverspike

Robert Doverspike received his undergraduate degree from the University of Colorado and Masters and Ph.D. degrees from Rensselaer Polytechnic Institute (RPI). He began with Bell Labs in 1979 and, upon divestiture of the Bell System, went to Bellcore (now Telcordia). In 1997 he returned to AT&T Labs (Research) where he is now Executive Director of Network Evolution Research. Dr. Doverspike has made extensive contributions to the field of optimization of multi-layered transmission and switching networks and pioneered the concept of packet transport in metro and long distance networks. He also pioneered work in spearheading the deployment of new architectures for transport and IP networks, network restoration, and integrated network management of IP-over-optical-layer networks. He has over 1000 citations to his books and articles (Google scholar, as of March 2010) over diverse areas such as Telecommunications, Optical Networking, Mathematical Programming, IEEE Communications Society, Operations Research, Applied Probability, and Network Management. Dr. Doverspike holds many professional leadership positions and awards, such as INFORMS Fellow, IEEE Fellow, member of Optical Society of America (OSA), co-founder of the INFORMS Technical Section on Telecommunications, member of OFC technical subcommittee, steering committee of Design of Reliable Communications Networks (DRCN), and associate editor of the Journal of Heuristics.


Network restoration is a common approach telecommunications carriers use to provide a desired level of network reliability. Restoration is defined as the process of rerouting connections (or traffic) around components that experience outages. An outage can include a wide variety of causes, including network component failure, maintenance, reconfiguration, upgrading, and software/middleware upgrades. Restoration occurs at many different segments and layers of the network. The decision of which segment, which layer, and which restoration method is the result of historical, economic, and technological realities. This talk will give a broad overview of the existing network segments, layers, and restoration methods in today's large telecommunications carrier, including the motivation behind the present architectures. Finally, we will discuss likely future trends and needs.