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ThinkMind // International Journal On Advances in Telecommunications, volume 5, numbers 3 and 4, 2012 // View article tele_v5_n34_2012_2


Blocking Performance of Multi-rate OCDMA PONs with QoS Guarantee

Authors:
John S. Vardakas
Ioannis D. Moscholios
Michael D. Logothetis
Vassilios G. Stylianakis

Keywords: Passive Optical Network; Optical Code Division Multiple Access; Multiple Access Interference; Blocking Probability; Quality of Service; Parallel Mapping.

Abstract:
In this paper, we propose a new teletraffic model for the calculation of blocking probabilities in an Optical Code Division Multiple Access (OCDMA) Passive Optical Network (PON) supporting multiple service-classes of Poisson traffic. OCDMA is a promising candidate of PON configuration for the provision of moderate security communications with large dedicated bandwidth to each end user. The PON accommodates multiple service-classes that are differentiated by either different data-rates or different Quality of Service levels. Parameters related to the additive noise, multiple access interference and user activity are incorporated into our analysis. Based on a two-dimensional Markov chain, we propose a recursive formula for the calculation of the number of in-service codewords, when the OCDMA PON guarantees Quality of Service (QoS), or not. To evaluate the proposed model, the analytical results are compared with simulation results to reveal that the model's accuracy is quite satisfactory.

Pages: 120 to 130

Copyright: Copyright (c) to authors, 2012. Used with permission.

Publication date: December 31, 2012

Published in: journal

ISSN: 1942-2601

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