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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 27, Iss. 17 — Sep. 1, 2009
  • pp: 3923–3932

Nonblocking Four-Stage Multicast Network for Multicast-Capable Optical Cross Connects

Fangfang Yan, Weisheng Hu, Weiqiang Sun, Wei Guo, Yaohui Jin, Hao He, Yi Dong, and Shilin Xiao

Journal of Lightwave Technology, Vol. 27, Issue 17, pp. 3923-3932 (2009)


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Abstract

In this paper, we investigate the four-stage multicast network with only two multicast stages (the second and output stages) being multicast-capable, which is called 4(2 m)-stage multicast network. We first derive the sufficient wide-sense nonblocking (WSNB) and rearrangeable nonblocking (RNB) conditions for the 4(2 m)-stage multicast network. The WSNB and RNB conditions are also presented for multicast request with limited multicast degree. The 4(2 m)-stage multicast network needs at least O$(N^{3 / 2})$ crosspoints to be WSNB and RNB, which is a lower bound than the three-stage Clos network with two multicast stages and the same bound with the four-stage network with three multicast stages. Then we design full and partial multicast-capable optical cross connects (MC-OXCs) applying the 4(2m)-stage multicast network. The proposed WSNB full MC-OXC with two multicast stages is power efficient in reducing splitting loss and has lower multicast cost, compared with the one having three multicast stages. Partial MC-OXC with only one multicast stage is proposed to further reduce the multicast cost and splitting loss. The RNB MC-OXCs with one or two multicast stages provide better performance at the respects of crosspoints, multicast cost, and splitting loss than their WSNB counterparts.

© 2009 IEEE

Citation
Fangfang Yan, Weisheng Hu, Weiqiang Sun, Wei Guo, Yaohui Jin, Hao He, Yi Dong, and Shilin Xiao, "Nonblocking Four-Stage Multicast Network for Multicast-Capable Optical Cross Connects," J. Lightwave Technol. 27, 3923-3932 (2009)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-27-17-3923

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