
Dynamic Routing and Wavelength Assignment in Optical WDM Networks
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597
0.30 0.40 0.50 0.60 0.70
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
ARPA-2
W
=8
Blocking probability
Load (Erlang)
(a)
SP
ASP
ABR
0.30 0.40 0.50 0.60 0.70 0.80
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
ARPA-2
W
=16
Blocking probability
Load (Erlang)
(b)
SP
ASP
ABR
Figure 24.11 Comparisons between ABR and other routing algorithms on ARPA-2. (a) The
number of wavelengths W =8. (b) The number of wavelengths W = 16.
for the small network with a small average node degree of 2.7, there are only a few alternate routes
between any two nodes.
The results in Figure 24.10 indicate clearly that for a larger network with ...