# PROVIDING WORLD-CLASS NETWORK

# OPTIMIZATION DESIGN TOOLS & RELATED

# PROFESSIONAL SERVICES

Our scientists are leaders with international reputations in the development and application
of new methods for the design of complex network facilities, including backhaul networks for
wireless traffic, local access networks, SONET ring networks, optical networks, international
transit networks, and interconnection networks between local and interexchange carriers.
We have unique capability to solve detailed traffic routing and scheduling problems
simultaneously with the overall network architecture and capacity planning problems, so
that we can specify how best to use the facilities we design. Many of these problems are
known to be theoretically unsolvable in practical amounts of time. We have pioneered the
successful practical applications of heuristic techniques such as genetic algorithms to obtain
optimal or near-optimal results. To learn more about the techniques we use, see our
Mathematical Optimization page or read our paper on a specific example of Backhaul
Network Optimization and Minimizing the Cost of Wireless Switch Capacity Expansion.
In the network pictured
in Figure 1, the nodes
that generate traffic are
shown as triangles, those
that are candidates to be
digital hubs, capable of
consolidating traffic, are
shown as boxes with the
letter "H" inside, and
the switch is shown as a
box with an "M" inside.
The thin lines are DS1
circuits and the heavy
lines are DS3s.
For each node, the type
of node and the demand
can be indicated. The
cost data, for link choices,
is also provided. Given the demand and the potential network design, our optimization
program calculates the best routing of traffic and establishment of hubs to serve the demand.
Figure 1 represents the original network, before optimization for increasing demand. Figure
2 illustrates a network which has been optimized to serve increased demand cost effectively.
Note that in Figure 2 demand has been rerouted to better utilize hubs, more completely
filling DS3 circuits. In many cases the routing of traffic may be somewhat counter-intuitive.
The power of mathematical modeling can spot the solution that is most cost effective and may
otherwise have been missed!
The important fact to understand is that the least costly solution may not always be obvious.
We at Cox Associates would be delighted to demonstrate our technology to you and prove
that we can, as we
consistently have, save
you from 10% to 40%
on your network costs.
We can not only
optimize your network
as it is now, but we can
also provide you tools
and techniques to
ensure that your
network remains as
cost effective over time
as demand patterns
grow and shift.
COX ASSOCIATES CONSULTING | DENVER | Tel: 303.388.1778

Superior Business Decisions Through Better Data Analysis

NETWORK OPTIMIZATION & DESIGN
Given the choice of traffic routing, link capacities
and technologies which can potentially be used, it
is no trivial task to determine the best way to
configure a network to reliably handle offered load
while keeping costs at a minimum.

# White Papers

# Network operating costs often dominate both

# capital and operating expenses for a

# telecommunications provider. Given a choice

# of traffic routing, link capacities and

# technologies which can potentially be used, it

# is no trivial task to determine the best way to

# configure a network to reliably handle offered

# load while keeping costs at a minimum.

# Rigorous mathematical techniques can help

# achieve the least costly network design to

# meet demand and provide high quality

# service. Practical network optimization

# software and heuristics are specialties of Cox

# Associates. Some examples of network

# optimization software tools developed by Cox

# Associates since 1996 include:

# 1.Leased LEC-facilities backhaul network

# design for Cellular and PCS networks;

# 2.Merging existing and newly acquired

# network facilities;

# 3.PCS switch capacity optimization and

# capacity expansion planning;

# 4.Switch load growth forecasting;

# 5.Optimal equipment deployment for legacy

# and next-generation transport networks.

# Benefits of Optimization:

# •

# Minimize the cost of your network

# now and over time.

# •

# Provide the level of reliability and

# survivability you choose.

# •

# Serve a growing customer base

# through a higher quality of service.

# REDUCING COSTS