Abstract
Single-hop wavelength division multiplexing (WDM) networks based on a central arrayed
waveguide grating (AWG) have attracted a great deal of attention as a solution for metropolitan
area network applications because they can achieve high throughput with reduced cost due to the
periodic wavelength-routing property of the AWG. Unfortunately, scalability is a significant
problem in an AWG-based single-hop WDM network because the number of transceivers required at each
node is equal to the total number of nodes. This problem can be solved by providing optical
couplers between the AWG and the nodes and by aggregating multiple nodes before connecting to the
AWG. In this case, however, packet collisions at the couplers will seriously increase the packet
network delay. Therefore, we propose a novel AWG-based single-hop WDM network in which an
autonomic collision avoidance mechanism is introduced in the couplers. We derive the optimum
number of couplers for this architecture. Through numerical study, we clarify that the proposed
network architecture can reduce the total network cost dramatically.
© 2005 IEEE
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