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Optimization of Disjoints Using WDM-PON in an optical network

Circuits and Systems 2016年第9期7卷 2207-2216页

作者： K. Sasi Kala Rani A. Renuga Devi J. Suganthi Hindusthan Institute of Technology Coimbatore India Hindusthan College of Engineering and Technology Coimbatore India

An optical network is a type of data communication network built with optical fibre technology. It utilizes optical fibre cables as the primary communication medium for converting data and passing data as light pulses between sender and receiver nodes. The major issue in optical networking is disjoints that occur in the network. A polynomial time algorithm Wavelength Division Multiplexing-Passive optical networking (WDM-PON) computes disjoints of an optical network and reduces the count of disjoints that occur in the network by separating optical network units (ONU) into several virtual point-to-point connections. The Arrayed Waveguide Grating (AWG) filter is included in WDM-PON to avoid the traffic in the network thereby increasing the bandwidth capacity. In case of a failure or disjoint Ant Colony Optimization (ACO) algorithm is used to find the optimized shortest path for re-routing. For enhanced security, modified Rivert Shamir Adleman (RSA) algorithm encrypts the message during communication between the nodes. The efficiency is found to be improved in terms of delay in packet delivery, longer optical reach, optimized shortest path, packet error rate.

关键词： optical network Disjoints Wavelength Division Multiplexing Passive optical networking optical network units Arrayed Waveguide Grating Ant Colony Optimization

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A Burst Assembly Method for Decreasing End-to-end Packet Delays in optical Burst Switching networks

A Burst Assembly Method for Decreasing End-to-end Packet Del...

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2006 10th International Conference on Communication Technology（ICCT 2006）

作者： Yukinobu Fukushima Tokumi Yokohira Yasuhiro Noine Kazuteru Nagahara The Graduate School of Natural Science and Technology Okayama University3-1-1 Tsushimanaka Okayama-shi 700-8530 Japan

Although the offset-time-based scheme can differentiate packet/burst loss rate according to their QoS levels in optical burst switching networks, it increases end-to-end packet delays of packets in a burst with higher QoS level. This is because it increases offset time of bursts in proportional to their QoS levels. In this paper, we propose a burst assembly method that decreases end-to-end packet delays. Our proposed method includes packets that arrive during the offset time into the currently assembled bursts while the conventional method includes them into the burst assembled next time. Simulation results show that our method offers more than 21% delay reduction for bursts with the highest QoS level.

关键词： Assembly optical burst switching Delay optical packet switching optical buffering optical network units Size control Telecommunications optical losses Next generation networking

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