Bulletin
100, August 97
Communication Networks Cost and
Performance Optimization by constrained Engineering and Routing
Harro L. HARTMANN, Technical
University of Braunschweig, Braunschweig, Germany
Monday, September
21, 14.30 - 16.00
Abstract
This contribution integrates
advanced nonhierarchical least-cost multi-link-routing, and modular capacity
assignments, for private arbitrary-interconnected ISDNs, into a unique
procedure. An extended-sequential-office-controlled routing, and the available
facility modules, are modelled and converted to a fast recursive algorithm
with linear flow and nonlinear integer capacity assignments. This is carried
out under the constraints of a given initial topology, traffic demand,
and Grade-of-Service for each demand-pair. The algorithm became the basis
of a Network Engineering and Routing Tool for Private-Networks (NERT-PN).
An ISDN network example of 36 switches with various modular capacity assignments,
demonstrates near-minimum-cost outputs, and end-to-end-node-pair-blockings
(EEBs) within the prescribed Grade of Service (GOS) constraints. The constrained
minimum costs are then verified by a comparison of the link capacities
and demand-pair performance expressed by the EEB-values for both the module
1, and the selected module 30 sample cases. Extensive supplements and conclusions
cover limitations, advantages and OR-oriented recommendations for further
work.
Biographical Sketch
Harro L. Hartmann
received the 'Dipl-Ing.' degree in Electrical Engineering from the Technical
University of Berlin in 1962, and the 'Dr.-Ing.' degree from the Department
of Electrical Engineering at the Technical University of Munich in 1966.
He was with the Central Laboratory of Siemens AG in Munich, where he performed
research work on PCM-Transmission, -Switching, and Integrated Digital Networks,
especially with regard to problems of Network Synchronization.
In 1972 Hartmann accepted
a full professorship at the newly founded Institute for Communication Systems
(ICS) at the Technical University of Braunschweig, Germany. He is the author
of a number of papers on Digital Transmission, Stochastic Processes in
Communication Systems, Network Synchronization and Broadband ISDN, and
he holds several patents on network equipments and routing. The ICS technical
staff and Hartmann are now engaged in complementary ATM Dynamic Traffic
and Transport Routing, and Object Oriented Network Planning Tools. Dr.
Hartmann is a member of the IEEE (M'77), 'Informationstechnische Gesellschaft'
(ITG), and 'Gesellschaft für Informatik' (GI).
Prof. Dr.-Ing. Harro
L. Hartmann
Institute for Communication
Systems (ICS)
Technical University Braunschweig,
Germany
Hans Sommer Str. 66
D 38106 Braunschweig
Phone: ++ 531 391 5285
Fax.: ++ 531 391 5296
E-mail: hartmann@ins.tu-bs.de
ICS Homepage: http://www.tu.-bs.de/institute/ins
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