Drop policies and multiple edge thresholds to enhance the performance of TCP over OBS networks with retransmission

Drop policies and multiple edge thresholds to enhance the performance of TCP over OBS networks... Due to the bufferless nature of OBS networks, contention will unavoidably occur in core nodes. When the retransmission scheme is introduced into OBS networks, the bursts in the contention will be dropped selectively according to the drop policy adopted in core nodes, and retransmitted by edge nodes. In this paper, we proposed a drop policy based on Hop Number, in which the bursts with the larger total hop number will be given the higher priority in the contention. Taking the retransmission cost into account, we proposed another novel drop policy based on Hop Number Factor. Meanwhile, in edge nodes, multiple thresholds are also proposed to limit the unnecessary retransmission, and ease the deteriorated network performance. Both theoretical analyses and simulation results show that the proposed mechanisms can reduce the burst loss rate and the round trip time effectively, and improve the throughput significantly in TCP over OBS networks with retransmission. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Photonic Network Communications Springer Journals

Drop policies and multiple edge thresholds to enhance the performance of TCP over OBS networks with retransmission

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Publisher
Springer US
Copyright
Copyright © 2008 by Springer Science+Business Media, LLC
Subject
Computer Science; Characterization and Evaluation of Materials; Electrical Engineering; Computer Communication Networks
ISSN
1387-974X
eISSN
1572-8188
D.O.I.
10.1007/s11107-008-0152-z
Publisher site
See Article on Publisher Site

Abstract

Due to the bufferless nature of OBS networks, contention will unavoidably occur in core nodes. When the retransmission scheme is introduced into OBS networks, the bursts in the contention will be dropped selectively according to the drop policy adopted in core nodes, and retransmitted by edge nodes. In this paper, we proposed a drop policy based on Hop Number, in which the bursts with the larger total hop number will be given the higher priority in the contention. Taking the retransmission cost into account, we proposed another novel drop policy based on Hop Number Factor. Meanwhile, in edge nodes, multiple thresholds are also proposed to limit the unnecessary retransmission, and ease the deteriorated network performance. Both theoretical analyses and simulation results show that the proposed mechanisms can reduce the burst loss rate and the round trip time effectively, and improve the throughput significantly in TCP over OBS networks with retransmission.

Journal

Photonic Network CommunicationsSpringer Journals

Published: Aug 20, 2008

References

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