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Proceedings Paper

The impact of stale information on the blocking performance of dynamic routing, wavelength and timeslot assignment schemes for bandwidth on demand in metro agile all-optical ring networks
Author(s): Wei Yang; Sofia A. Paredes; Trevor J. Hall
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Paper Abstract

In emerging agile all-optical networks, where time division multiplexing (TDM) in the optical domain is implemented on top of wavelength-division multiplexing (WDM) to improve the network utilization and to support dynamic bandwidth demands, a control mechanism is required to handle the setup and tear down of fast flexible all-optical connections. In this paper, we propose two control protocols for WDM-TDM all-optical ring networks based on whether or not global network information is available. For the global information based protocol, we choose a periodic state-updating mechanism to confine the control message overhead within a reasonable range. For the local information based protocol, we select a backward reservation scheme for dynamic routing, wavelength and timeslot assignment (DRWTA) algorithms to prevent bandwidth overbooking. By conducting extensive numerical simulations, we investigate the impact of imprecise information on the blocking probability of the DRWTA algorithms for the two protocols. Our simulation results show that the local information based protocol outperforms the global information based protocol for metro all-optical networks where propagation delay is small compared to the service time of requests.

Paper Details

Date Published: 26 October 2007
PDF: 9 pages
Proc. SPIE 6796, Photonics North 2007, 67962U (26 October 2007); doi: 10.1117/12.778931
Show Author Affiliations
Wei Yang, Univ. of Ottawa (Canada)
Sofia A. Paredes, Univ. of Ottawa (Canada)
Trevor J. Hall, Univ. of Ottawa (Canada)


Published in SPIE Proceedings Vol. 6796:
Photonics North 2007

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