Abstract
A hybrid optical switch (HOS) with physical layer of wavelength division
multiplexing and optical code division multiplexing (WDM/OCDM) scheme is proposed.
An additional feature to the HOS than optical cross connect (OXC) is that the
controller can process requests for both circuit establishment and burst scheduling.
In our study, the measurement criteria of HOS are the blocking probability,
probability of error, and probability of outage. To simplify the analysis, no
distinction is made between a circuit in progress and a burst in progress. Moreover,
a minimum fit (MinF) resource allocation strategy is applied in order to increase
the bandwidth efficiency and control the multiplexing interference of the OCDM. A 2D
Markov model for the HOS is presented using the MinF strategy. Numerical results
reveal that the code parameters and the resource allocation strategy greatly affect
the performance. Certain periority can be achieved by assigning shorter codes to
high periority users and longer codes to low periority users. Also, the probability
of error and outage are reduced by appling the MinF strategy.
© 2014 Chinese Optics Letters
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