Abstract
A novel Internet protocol (IP) transmission and routing is proposed
over coherent multiple array (M-ary)
frequency shift keying optical code-division multiple-access (FSK-OCDMA) network
with incoherent demodulation. The architecture also benefits from the use
of the co-channel interference canceller. In contrast to wavelength-division
multiple-access (WDMA), a fewer set of wavelengths are needed as a result
of M-ary source coding. As the
spreading codes, double-padded modified prime codes (DPMPC) have been employed.
The performance has been analyzed in terms of the users' channel utilization
in the network and compared with common incoherent pulse-position modulation
technique. The results indicate that this architecture is very power efficient
and enhances the network capacity. With the advantage of shorter code length,
DPMPC also improves the throughput. It is shown that for a maximum bit-rate,
the network performance can be improved by reducing the channel utilization.
Since each IP packet is buffered only at the edge of this network, the buffer
delay is considerably reduced. The novel encoder adjusting time management
reduces the switching time notably rather than traditional routing. Our analytical
investigation clearly indicates that this OCDMA technique can be an excellent
candidate for the future ultra-fast high bit-rate optical IP networks.
© 2009 IEEE
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