Information Technology Reference
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Figure 3) and this uniform channel allocation is not well suited for non-uniform traffic. Figure
5(a) and (b) show two examples in which the multi-passive-combiner hubs realize non-
uniform channel allocation. In these examples, the multi-passive-combiner hubs use the same
number of channels as the AWG hub shown in Figure 3 but they can better utilize these
channels for non-uniform traffic.
Figure 3. Example of an AWG hub [3, 18-22]. The AWG hub can provide more channels than the
passive-star-coupler hub shown in Figure 2.
Figure 4. Multi-passive-combiner hub proposed by the author in [1-2]. In this example, the hub
provides the same communication function as the AWG hub shown in Figure 3 (i.e., provides one
wavelength channel to each input-output pair).
