Abstract
Bandwidth-variable (BV) optical networks have been proposed as a novel technology to provide spectrum-efficient transportation. In order to study the performance of the BV optical networks, we propose a BV extension to RSVP-TE signaling protocol and implement it with different routing schemes on our large-scale ASON test-bed. Results show that the adaptive routing (AR) combined with forward reservation RSVP-TE signaling (AR+RSVP-fBV) scheme has lower routing blocking probability; however, since its signaling blocking probability is higher than the fixed routing (FR) combined with backward reservation RSVP-TE signaling (FR+RSVP-bBV) scheme, it has no significant advantage in the overall blocking performance, especially in a highly dynamic network scenario. The introduction of spectrum conversion cannot improve the overall blocking performance significantly due to its higher signaling blocking probability, and worse yet, it increases setup delay.
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