Performance analysis of optical multicast in a new switching structure  

作　　者：JIA Peng ZHANG Jie GU Wan-yi 

机构地区：[1]Key Laboratory of Optical Communication and Lightwave Technologies,Ministry of Education, Beijing University of Posts and Telecommunications,Beijing 100876, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2007年第3期43-47,共5页中国邮电高校学报（英文版）

基　　金：This work is supported by the Hi-Tech Research and Development Program of China （2006AA01Z244）；The National Natural Science Foundation of China （60772022）；Program for New Century Excellent Talents in University （NCET-05-0112）.

摘　　要：The emergence of new services demands multicast function in optical network. Because of the high cost and complex architecture of multicast capable （MC） node, splitter- sharing switch structure is introduced in which the light splitters are shared by all input signals. To accommodate to this situation, by extending resource ReSerVation protocol-traffic engineering （RSVP-TE） and open shortest path first-traffic engineering （OSPF-TE）, a new optical multicast mechanism is provided and the signaling flow and its finite state machine model are given. At the same time, a multicast routing algorithm in splitter-sharing optical network and a changing link weight policy to balance network traffic are proposed. Simulations in NSFNET show no matter with or without wavelength converters, when the number of splitters is 25% of that demanded by traditional MC nodes, the multicast performance has been close to the ideal circumstance. Wavelength converters and changing link weight help much in improving the traffic performance when the number of splitters is adequate.The emergence of new services demands multicast function in optical network. Because of the high cost and complex architecture of multicast capable （MC） node, splitter- sharing switch structure is introduced in which the light splitters are shared by all input signals. To accommodate to this situation, by extending resource ReSerVation protocol-traffic engineering （RSVP-TE） and open shortest path first-traffic engineering （OSPF-TE）, a new optical multicast mechanism is provided and the signaling flow and its finite state machine model are given. At the same time, a multicast routing algorithm in splitter-sharing optical network and a changing link weight policy to balance network traffic are proposed. Simulations in NSFNET show no matter with or without wavelength converters, when the number of splitters is 25% of that demanded by traditional MC nodes, the multicast performance has been close to the ideal circumstance. Wavelength converters and changing link weight help much in improving the traffic performance when the number of splitters is adequate.

关 键 词：splitter-sharing optical multicast optical network wavelength converter 

分 类 号：TN929.11[电子电信—通信与信息系统]