Performance Improving Techniques for WDM Optical Packet Switching Architecture
Article Sidebar
Main Article Content
Abstract
At present, WDM optical packet switching has been introduced into the all-optical network for enhancement the efficiency of various modern services in the near future. Many technical articles suggested the capability improvement of the switching architecture. And most of these suggestions pinpointed to solve the packet contention problem or the instantaneous conveying of data packet to the same output, which caused the losing of packets and effect to the modern efficiency. Optical buffer, which is cluster of fiber delay lines, is used to collect the discarded packet during contention occurrence in WDM optical packet switching architecture. There are 2 types of optical buffer, which are
- Output buffer, which located at the output end of the switch, assigned to temporarily collect losing packet during contention occurrences and send out to the output in the next time slot.
- Shared buffer, which is common with other output buffers and feedback to the input of the switch, assigned to temporarily collect the losing packet and the occupied output buffer during contention. These packets will be sent back to the input of the switch for switching out to the proper output of the next time slot.
The consequential effect of this technique is the delaying of the temporary collected packet in the buffer, especially the re-circulating packet between shared buffer and switch or the “Worst Delay Packet”, and finally affect upon the switching capability.
This content will by then propose the way to solve packet contention on course of WDM optical packet switching architecture. It will also introduce technique on minimization the delay of “Worst Delay Packet” by queuing prioritization. By the sake of simply internal structure of bypassing queues with fiber delay lines as main function, this will effectively minimize the delay in “Worst Delay Packet” with less side effect to overall system performance.
Keywords: optical communication, WDM
Corresponding author: E-mail: [email protected]
Article Details
Copyright Transfer Statement
The copyright of this article is transferred to Current Applied Science and Technology journal with effect if and when the article is accepted for publication. The copyright transfer covers the exclusive right to reproduce and distribute the article, including reprints, translations, photographic reproductions, electronic form (offline, online) or any other reproductions of similar nature.
The author warrants that this contribution is original and that he/she has full power to make this grant. The author signs for and accepts responsibility for releasing this material on behalf of any and all co-authors.
Here is the link for download: Copyright transfer form.pdf
References
[2] Myungsik Yoo, Chunming and Sudhir Dixit, “Qos Performance of Optical Burst Switching in IP-Over-WDM Networks”, IEEE Journal on Selected Areas in Communications, Vol. 18, No. 10, October 2000, pp.2062-2071.
[3] Michael G. Hluchyj and Mark J. Karol, “Queueing in High-Performance Packet Switching”, IEEE Journal on Selected Areas in Communications, Vol.6, No.9, December 1988, pp.1587-1597.
[4] Mischa Schwartz, “Telecommunication Networks: Protocois, Modeling and Analysis”, Addison-Wesley Publishing Company, November 1988.