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Proceedings Paper

ACK filling void first algorithm and performance for asynchronous OPS
Author(s): Huanlin Liu; Yonghe Shi; Qianbin Chen; Yingjun Pan
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Paper Abstract

OPS with feedback shared FDL buffer produce large voids due to FDL buffers only supplying discrete step delay and causing FDL queue virtually occupation. By analyzing the TCP traffic and ACK packets feature, the ACK packet void filling first scheduling is presented to decrease packet loss rate and to reduce the FDL voids. When the FDL buffer void size is fit for the ACK packet, the ACK packet is scheduled to FDL immediately. An ACK and non-ACK packets difference and process flow is designed according the TCP packet frame structure. Compared with the conventional FIFO scheduling and smallest FDL void first scheduling, the algorithm reduces greatly the number of ACK occupying the FDL buffer and eliminates large numbers of ACK's bad influence on efficiency of IP data transmission under different FDL buffer depth and traffic load. The results of simulation show that the proposed scheduling makes use of ACK packets first void filling scheduling mechanism to reduce FDL excess load, increases output utilization and reduce packet loss ratio for asynchronous optical network. This approach is shown to minimize the FDL numbers with the feature of high stabilization and photonic integration and to improve real time TCP traffic performance for Internet network.

Paper Details

Date Published: 19 November 2007
PDF: 8 pages
Proc. SPIE 6783, Optical Transmission, Switching, and Subsystems V, 67833F (19 November 2007); doi: 10.1117/12.741755
Show Author Affiliations
Huanlin Liu, Chongqing Univ. of Posts and Telecommunications (China)
Chongqing Univ. (China)
Yonghe Shi, Chongqing Univ. of Posts and Telecommunications (China)
Qianbin Chen, Chongqing Univ. of Posts and Telecommunications (China)
Yingjun Pan, Chongqing Univ. (China)


Published in SPIE Proceedings Vol. 6783:
Optical Transmission, Switching, and Subsystems V
Dominique Chiaroni; Wanyi Gu; Ken-ichi Kitayama; Chang-Soo Park, Editor(s)

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