Dynamic Call Routing Circuit-Switched Networks under Various Circuit Layout Policies
D. Medhi
Computer Science Telecommunications
University of Missouri -- Kansas City
5100 Rockhill Road
Kansas City, Missouri 64110 US
Email: dmedhi_AT_cstp.umkc.edu
S. Sankarappan
cisco Systems, California
(*work done while at UMKC)
ssankara_AT_cisco.com
Abstract
A major transmission facility failure such as a fiber cut can
significantly deteriorate the performance of a network by affecting
multiple trunk groups in the network. To improve network performance
various restoration options (pre-planned or real-time) in the traffic
and/or the transmission facility network can be addressed. In this
paper, we address the implication of various pre-planned circuit
layout policies (based on trunk group diversity) on dynamic routing
circuit-switched networks in the event of a failure.
Using a network based on realistic data, we give results on
comparative network performance under different circuit layout
policies and on the effect of a failure depending on the
time of the day it occurs.
We observe that in the event of a failure, a network with trunk group
diversity provides load balancing in terms of pairwise blocking and
avoids isolation of traffic pairs compared to a network without trunk
group diversity. However, in some instances, the overall network
blocking may not be lower in a network with trunk group diversity
compared to a network without trunk group diversity.
Keywords: circuit-switched networks; dynamic call routing; circuit layout; trunk group diversity; network failure
JNSM: Vol. 1, No. 2, 1993
Dynamic Call Routing Circuit-Switched Networks under Various Circuit Layout Policies [Vol. 1, No. 2, 1993]
NOTE: only abstract of paper available on-line
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