Title: Performance analysis of a packet prioritisation algorithm for optical-packet-switching networks

Authors: Kuan-Hung Chou, Woei Lin

Addresses: Department of Computer Science and Engineering, National Chung Hsing University, No. 250, Guoguang Rd., South District, Taichung City 402, Taiwan. ' Department of Computer Science and Engineering, National Chung Hsing University, No. 250, Guoguang Rd., South District, Taichung City 402, Taiwan

Abstract: Because of the explosive growth of network traffic, backbone networks move towards all-optical-packet-switching networks. However, optical buffers implemented by Fibre Delay Lines (FDLs) have a volatile nature because of signal loss and noise accumulation problems from optical components of the FDL buffer. Because of this, scheduling packets becomes more difficult in the FDL buffer than in the RAM buffer, and requires additional design considerations for reducing packet loss. Therefore, we propose a packet prioritisation algorithm for all-optical-packet-switching networks with FDL buffers. The point of the packet prioritisation algorithm is to rank packets in optimal balance between latency and residual distance. We optimise a relative-distance factor to minimise packet loss probability. Our simulation results show how various network parameters affect the optimal relative-latency factor.

Keywords: multi-hop packet scheduling; buffer management; optical packet switching networks; fibre delay lines; optical buffers; packet prioritisation; FDL buffers; packet loss reduction; latency; residual distance; simulation.

DOI: 10.1504/IJAHUC.2010.034969

International Journal of Ad Hoc and Ubiquitous Computing, 2010 Vol.6 No.3, pp.164 - 171

Published online: 31 Aug 2010 *

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