A Limited Deflection Routing Algorithm Based on Burst Loss Threshold in OBS Networks  

作　　者：WANG Ru- yan LONG Ke-ping WU Wei YANG Xiao-long ZHU Wei-le 

机构地区：[1]The College of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 610054, P. R, China [2]Special Research Centre for Optical Internet & Wireless Information Networks, Chongqing Univ of Posts and Telecom, Chongqing 400065, P.R. China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2005年第3期44-48,共5页中国邮电高校学报（英文版）

基　　金：This workis supported by project of National Science Foundation of China (No.90304004) , National"863"Project Plan (No.2005AA122310) , Keyproject of Science and Technology of National Education Department (No.204125) , project of Science Foundation of Chongqing Science and Technology Commission(No.2005BB2062) , Youth Science and Technology Grant of CQUPT(No.A2005-28) .

摘　　要：The deflection routing protocol is an effective contention resolution in Optical Burst Switching network, However, it can worsen loss performance of non-deflected burst on the deflection route. To improve the burst loss performance, a limited deflection routing scheme based on burst loss threshold is proposed to prevent injudicious deflection routing. By using threshold check function, it restrainedly allows the deflected burst to preemptive network resource, consequently, improve the QoS performance of non-deflected burst. Simulation results show that the scheme can efficiently prevent deflected burst contending with non-deflected burst on deflection route, and effectively improve the burst loss performance of entire networks.The deflection routing protocol is an effective contention resolution in Optical Burst Switching network, However, it can worsen loss performance of non-deflected burst on the deflection route. To improve the burst loss performance, a limited deflection routing scheme based on burst loss threshold is proposed to prevent injudicious deflection routing. By using threshold check function, it restrainedly allows the deflected burst to preemptive network resource, consequently, improve the QoS performance of non-deflected burst. Simulation results show that the scheme can efficiently prevent deflected burst contending with non-deflected burst on deflection route, and effectively improve the burst loss performance of entire networks.

关 键 词：optical burst switching deflection routing algorithm burst loss threshold threshold check function 

分 类 号：TN91[电子电信—通信与信息系统]