一种基于QoS策略的光突发交换网络LSP共享算法

J4 ›› 2013, Vol. 30 ›› Issue (4): 501-506.

一种基于QoS策略的光突发交换网络LSP共享算法

沈建华杨帆陈健糜正琨

南京邮电大学通信与信息工程学院，江苏南京 210003

收稿日期:2012-09-10 修回日期:2012-12-05 出版日期:2013-07-28 发布日期:2013-07-06
通讯作者: 沈建华（1972-）江苏人，博士，副教授，从事光通信与网络的研究。 E-mail:shenjh@njupt.edu.cn

An QoS based LSP shared algorithm for optical burst switching networks

SHEN Jianhua，YANG Fan，CHEN Jian，MI Zhengkun

College of Communication and Information Engineering, Nanjing University of Posts & Telecommunications, Nanjing 210003, China

Received:2012-09-10 Revised:2012-12-05 Published:2013-07-28 Online:2013-07-06

摘要/Abstract

摘要： 针对光突发交换（OBS）网络中已有的包括抢占和波长分离等服务质量（QoS）保证机制的不足，提出了一种改进的基于QoS的标签交换路径共享（QLS）算法。算法通过链路波长资源的统计复用，在保证高优先级业务传送的可靠性和有效性的同时，提升低优先级业务的QoS性能。使用开源离散事件仿真软件OMNeT++搭建了OBS/GMPLS仿真平台，对4×4对称型MESH网络和NSFNET网络分别采用WP算法和QLS算法进行了仿真。结果表明，QLS算法对于高QoS等级业务性能影响极小，MESH和NSFNET网络中class3业务的丢包率分别减少了近0.2和0.3，平均丢包率分别减少了约0.05和0.1。

关键词: 光通信, 光突发交换, 基于服务质量的共享标签交换路径算法, 网络性能

Abstract: To eliminate the shortcomings of existing Quality of Service (QoS) mechanisms such as Preemption and Wavelength Partition (WP) in Optical Burst Switch (OBS) networks, an improved QoS based LSP sharing (QLS) algorithm is proposed. QLS algorithm supports statistical multiplexing of wavelength resource by improving the performance of low priority service while ensuring transmission reliability and validity of the high priority service simultaneously. An Open source discrete event simulation software OMNeT + + based OBS / GMPLS simulation platform is created for WP and QLS algorithm in 4 × 4 symmetric MESH network and NSFNET network topology. Simulation results shows that for Class3 service, QLS algorithm can improve packet loss ratio by 0.2 and 0.3 for MESH and NSFNET, while average packet loss ratio performance improved 0.05 and 0.1 respectively.

Key words: optical communication, optical burst switch, quality of service based label switching path shared algorithm, network performance

中图分类号:

TN913.7

沈建华杨帆陈健糜正琨. 一种基于QoS策略的光突发交换网络LSP共享算法[J]. J4, 2013, 30(4): 501-506.

SHEN Jianhua，YANG Fan，CHEN Jian，MI Zhengkun. An QoS based LSP shared algorithm for optical burst switching networks[J]. J4, 2013, 30(4): 501-506.

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