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

So, Won-Ho (전북대학교 전자정보공학부 영상정보기술연구소 차세대통신망연구실)
Cha, Yun-Ho (전북대학교 전자정보공학부 영상정보기술연구소 차세대통신망연구실)
Roh, Sun-Sik (전북대학교 전자정보공학부 영상정보기술연구소 차세대통신망연구실)
Kim, Young-Chon (전북대학교 전자정보공학부 영상정보기술연구소 차세대통신망연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.27, no.1C, 2002 , pp. 1-10 More about this Journal
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 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 guaranteed under various traffic load with the determinded offset time by using the proposed OTD algorithm.
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Times Cited By KSCI : 3  (Citation Analysis)
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