Design and Performance Evaluation of Offset Time Decision Algorithm for Guaranteeing the QoS in Optical Burst Switching Networks 


Vol. 27,  No. 1, pp. 1-10, Jan.  2002


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  Abstract

With the explosive growth of the number of Internet users and Internet-related services, the research on construction of broadband Optical Internet by using WDM technologies is actively progressed. In this paper, we design the offset time decision (OTD) algorithm for supporting the QoS in optical networks based on optical burst switching (OBS), which is the new switching paradigm, and evaluate the performance of it. The proposed algorithm determines a reasonable offset time considering traffic load of network and the number of wavelengths to guarantee the burst loss rate (BLR) of high priority Internet traffic as a QoS parameter. In order to design the proposed OTD algorithm, firstly we make the new burst loss formula, which includes the effect of offset time. The decision of offset time corresponding to the requested BLR, however, should use the reverse formula of proposed one, thus we are not able to use it without any changes. In this paper, we define the heuristic loss formula (HLF) that can be changed into reversed formula by using the proposed formula and proportional equation considering its characteristics. Finally we show the OTD algorithm to decide the offset time by using HLF. We show that the requested BLR is guarauteed under various traffic load with the determinded offset time by using the proposed OTD algorithm.

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  Cite this article

[IEEE Style]

W. So, Y. Cha, S. Roh, Y. Kim, "Design and Performance Evaluation of Offset Time Decision Algorithm for Guaranteeing the QoS in Optical Burst Switching Networks," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 1, pp. 1-10, 2002. DOI: .

[ACM Style]

Won-ho So, Yun-ho Cha, Sun-sik Roh, and Young-chon Kim. 2002. Design and Performance Evaluation of Offset Time Decision Algorithm for Guaranteeing the QoS in Optical Burst Switching Networks. The Journal of Korean Institute of Communications and Information Sciences, 27, 1, (2002), 1-10. DOI: .

[KICS Style]

Won-ho So, Yun-ho Cha, Sun-sik Roh, Young-chon Kim, "Design and Performance Evaluation of Offset Time Decision Algorithm for Guaranteeing the QoS in Optical Burst Switching Networks," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 1, pp. 1-10, 1. 2002.

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pISSN : 1226 - 4717
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