1-Persistent Collision-Free CSMA Protocols for Opportunistic Optical Hyperchannels

  • Jing Chen
  • Jianping Wang
  • Hui Yu
  • Ashwin Gumaste
  • S. Q. Zheng
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5022)


Recently, a new WDM optical network infrastructure named SMART [1], which is capable of dynamically setting up, modifying, and tearing down optical connections, was proposed. The performance of SMART is determined by the performance of its hyperchannels, which are essentially optical buses or light-trails. Previously proposed CSMA protocols for unidirectional optical buses can be used as distributed medium access control protocols for hyperchannels. However, these protocols are either unfair, or not work-conserving. In this paper, we propose a class of work-conserving, collision-free, and fair CSMA protocols for opportunistic hyperchannels which are tailored hyperchannels for SMART. We show that the performances of our proposed protocols are much better than that of p i -persistent CSMA and that of priority-based CSMA protocol in terms of throughput and fairness.


Optical network WDM CSMA SMART network Light-Trail opportunistic hyperchannel 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Jing Chen
    • 1
  • Jianping Wang
    • 2
  • Hui Yu
    • 3
  • Ashwin Gumaste
    • 4
  • S. Q. Zheng
    • 5
  1. 1.Telecommunications Engineering ProgramUniversity of Texas at DallasRichardson 
  2. 2.Department of Computer ScienceCity University of Hong KongHong Kong 
  3. 3.Computer Engineering ProgramUniversity of Texas at DallasRichardson 
  4. 4.School of Information TechnologyIndian Institute of Technology, PowaiMumbaiIndia
  5. 5.Department of Computer ScienceUniversity of Texas at DallasRichardson 

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