中国邮电高校学报(英文) ›› 2007, Vol. 14 ›› Issue (3): 43-47.doi: 1005-8885 (2007) 03-0043-05

• Network • 上一篇    下一篇

Performance analysis of optical multicast in a new switching structure

贾鹏; 张杰; 顾畹仪   

  1. Key Laboratory of Optical Communication and Lightwave Technologies, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:2006-11-02 修回日期:1900-01-01 出版日期:2007-09-30

Performance analysis of optical multicast in a new switching structure

JIA Peng;ZHANG Jie;GU Wan-yi   

  1. Key Laboratory of Optical Communication and Lightwave Technologies, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2006-11-02 Revised:1900-01-01 Online:2007-09-30

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.

关键词:

splitter-sharing; optical multicast; optical network; wavelength converter

Abstract:

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.

Key words:

splitter-sharing; optical multicast; optical network; wavelength converter

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