| To achieve a scalable Open Shortest Path First (OSPF) routing domain, an
OSPF autonomous system is partitioned into a number of non-backbone
areas interconnected by a backbone area. The Dynamic Domain
Optimization Agent (DDOA) is a novel network design agent that has been
proposed in the PILSNER program to interact with a link topology manager
to automate assignment of links to OSPF areas and the selection of area
border routers (ABRs). Prior to the mission, DDOA computes OSPF area
designs that simultaneously satisfy multiple routing domain goals and
constraints, selecting the best area design for deployment. This paper
describes DDOA functionalities during a mission execution, where a
distributed community of DDOA agents uses the area design computed prior
to the mission as a guideline to pursue several goals: (1) network
optimizationkeep performance metrics and design constraints within
acceptable bounds, and (2) network maintenancepreserve or increase level
of connectivity by avoiding islands of disconnected nodes. To support
the above objectives, DDOA on each node monitors the network by
collecting network data and disseminating it to agents at selected
destinations. The lead DDOA also recommends a corrective action
whenever design constraints are no longer met such as initial
partitioning of a flat network topology, OSPF area split or merge,
network-wide replan, link reassignment between areas, and merging newly
formed or previously disconnected fragments. Finally, if a recommended
action is approved by the network planner, DDOA agents collaboratively
transition the network to a new area design by selectively reassigning
links/nodes to different areas in order to improve/optimize routing
efficiency within the OSPF domains.
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| Sunil Samtani is currently a Director managing a research group in the
area of Wireless Networking and Network Management. Sunil received
B.E. in Computer Engineering from University of Bombay; and M.S. in
Computer Science from the University of Missouri. He also has an MBA in
Finance from the Stern School of Business. Sunil currently serves as
the Principal Investigator for the CERDEC PILSNER Program where he leads
a team from Telcordia, GDC4S, Harris, and BAE to provide optimal network
design for WIN-T. He is also the lead technical architect for the
CERDEC MOSAIC program, and has been the Chief Engineer on the FCS
Network Management System effort.
Mariusz A. Fecko is curently a senior scientist at Applied Research,
Telcordia Technologies, Inc. Mariusz received M.S. degrees in both
Electronics and Computer Science from AGH University of Science and
Technology, Poland; and M.S. and Ph.D. in Computer and Information
Sciences from the University of Delaware. He serves as Principal
Investigator in ARL Collaborative Technology Alliance in wireless
networks, and has been a key member of the MOSAIC and PILSNER teams.
His resarch interests are communications technologies for wireless
on-the-move networks.
Dr. John Sucec is a research scientist in the Applied Research division
of Telcordia Technologies. He has worked in the field of network
engineering in industry or academia since 1996. His areas of research
expertise include routing and QoS in mobile ad hoc wireless networks.
Aristides Staikos is an Electronics Engineer for the US Army CERDEC
Space and Terrestrial Communications Directorate (S&TCD), Fort Monmouth,
NJ. He is currently the Government Team Leader of the Proactive
Integrated Link Selection for Network Robustness Program. Mr. Staikos
obtained B.E. in Computer Engineering from Stevens Institute of
Technology in 1999 and M.S. in Electrical Engineering from the New
Jersey Institute of Technology in 2002.
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