Bandwidth allocation based on priority and excess-bandwidth-utilized algorithm in WDM/TDM PON

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• 作者：Cuiping Ni ; Chaoqin Gan ; ^{cqgan@shu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Wei Li ; Haibin Chen
• 关键词：Excess bandwidth allocation ; Load ; Priority ; Wavelength domain ; WDM/TDM PON
• 刊名：AEU - International Journal of Electronics and Communications
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：69
• 期：11
• 页码：1659-1666
• 全文大小：1526 K

文摘

WDM/TDM passive optical network (PON) is being viewed as a promising solution for delivering multiple services and applications, such as high-definition video, video conference and data traffic. This paper introduces a novel bandwidth allocation scheme to efficiently utilize the bandwidth and support QoS (Quality of Service) guarantees in WDM/TDM PON. We develop the priority-based transmission windows and investigate the fair bandwidth allocation by using linearly proportional algorithm. Specially, the proposed scheme can increase the bandwidth-utilized rate (BUR) by collecting and allocating the excess bandwidths from both light-loaded ONUs (time domain) and wavelength domain. Besides, the performance of delay-sensitive services is greatly improved without degrading QoS guarantees for other services due to our priority-based scheme. Finally, we conduct detailed simulation experiments to research the performance and demonstrate the effectiveness of the proposed scheme.