LTE
LTE
LTE
LTE
LTE
LTE
……
LTE
LTE
LTE
LTE
LTE
LTE
……
TE
TE
TE
TE
TE
TE
……
R
R
R
R
R
R
……
R
R
R
R
R
R
……
R
R
R
R
R
R
……
A
A
A
A
……
A
A
A
A
……
A
A
A
A
……
A
A
A
A
……
A
A
A
A
……
A
A
A
A
……
LTE
LTE
LTE
LTE
LTE
LTE
……
LTE
LTE
LTE
LTE
LTE
LTE
……
TE
TE
TE
TE
TE
TE
……
R
R
R
R
R
R
……
R
R
R
R
R
R
……
R
R
R
R
R
R
……
A
A
A
A
……
A
A
A
A
……
A
A
A
A
……
A
A
A
A
……
Figure 1.Basic Building Block for the WDM Network
Optical Amplifier
Regenerator
Unmet demand
Satisfied demand
Excess capacity
Underprovisioned
Case
DallasAtlanta
Perfect Match
Case
LAPhoenix
Overprovisioned
Case
BostonNYC
Figure 2. The Possible Cases
0
50
100
150
200
250
300
350
400
450
-12.5-10-7.5-5-2.502.557.51012.5
Overprovisioned
Case
Underprovisioned
Case
Perfect Match
Case
UnderprovisioningOverprovisioning
Regret
Figure 3. The Regret Function
7
4
3
1
2
5
6
Atlanta
San Francisco
Los Angeles
Dallas
Chicago
Boston
New York
Figure 4. An Example Problem
Scenario 2
Scenario 1
Scenario 3
Robust Solution
Figure 5. Solutions
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