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Proceedings Paper

Novel packet-loss free reconfiguration scheme for GMPLS optical networks
Author(s): Aihua Guo; Wenlu Chen; Wei Chen; Zhonghua Zhu; Yung Jui Chen
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Paper Abstract

Reconfigurable optical network, the way of the future, can encounter serious packet loss problem during optical level reconfiguration. This paper presents a novel buffering scheme for GMPLS optical networks that minimizes packet loss during reconfiguration of optical nodes, consisting of both a reconfigurable optical cross-connects (OXCs), or an optical add-drop multiplexers (OADMs), and a packet-capable layer-two switch [1]. In this scheme, buffering takes place whenever an optical path is altered due to either a node reconfiguration or protection/restoration. Packets are buffered in a distributed manner starting from the first O/E/O-capable node before the reconfigured optical node all the way to the ingress node, if needed. In the worst-case scenario, where the path is all-optical or buffers are full along the path, all incoming packets are buffered at the ingress node, or the edge router. Buffering is carried out at layer two so that the interruption of service is kept at a minimum (less than 50ms, if possible). Furthermore, if buffers are overflowed, packets dropping will be carried out in accordance with the QoS levels, which further ensure that QoS of the network is maintained. It is shown by both analysis and simulation methods that this scheme performs quite well on either a general local area network, such as the UMBC WDM optical testbed, or the MCI backbone network. It is also cost-effective in that, even at the worst-case scenario, the required buffer is quite small.

Paper Details

Date Published: 29 August 2002
PDF: 9 pages
Proc. SPIE 4909, Network Design and Management, (29 August 2002); doi: 10.1117/12.481075
Show Author Affiliations
Aihua Guo, Univ. of Maryland/Baltimore County (United States)
Wenlu Chen, Univ. of Maryland/Baltimore County (United States)
Wei Chen, Univ. of Maryland/Baltimore County (United States)
Zhonghua Zhu, Univ. of Maryland/Baltimore County (United States)
Yung Jui Chen, Univ. of Maryland/Baltimore County (United States)

Published in SPIE Proceedings Vol. 4909:
Network Design and Management
Qian Mao; Shoa-Kai Liu; Kwok-wai Cheung, Editor(s)

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