Abstract
This paper proposes a novel IP routing schemes over coherent optical
code-division multiple-access (OCDMA) network. As spreading code, flexible
in length double-padded modified prime code (DPMPC) has been deployed. The
performance has been analyzed in terms of the users' channel utilization factor
in the network. The results are comparable with previous schemes and indicate
that the architecture is power efficient and capable of accommodating greater
number of active users with advantage of shorter code length (i.e., higher
bit rate). It is shown that for a maximum bit rate the network performance
can be improved by reducing the channel utilization. However, when each user
in the network has a fixed bit rate, optimal channel utilization can be set
for the overall network performance. Additionally, each IP packet is buffered
only at the edge of this network, thus the buffer delay is significantly reduced
compared with traditional routing schemes. Since the optical encoder is adjusted
for number of packets rather than individually, the encoder adjusting time
is also significantly reduced. Analytical results clearly indicate that coherent
OCDMA technique can be a fine candidate for the future ultra fast optical
IP networks.
© 2009 IEEE
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