Abstract
This paper presents a theoretical and experimental evaluation of the subcarrier-multiplexing label and payload
alignment in an optical label-swapping router; optical packets, which are composed of label and payload, are
transmitted from the edge router to the core router, where the labels are processed, and the new labels are
reassembled to the payload in a synchronized operation. True delays of the signals in the core router are precisely
evaluated, and synchronization aspects are studied in detail. For the first time, to our knowledge, the experimental
verification allows the evaluation of the delay-tolerance range in the process of coding the baseband label onto the
optical packet without affecting the normal operation of the router. Key issues found in the core-router
implementation are thoroughly described throughout this paper.
© 2007 IEEE
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