caa a22 4500 445870699 CHVBK 20180317145510.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11107-011-0305-3 doi (NATIONALLICENCE)springer-10.1007/s11107-011-0305-3 Comparison of routing methods in optical multicast WDM ring networks [Elektronische Daten] [Taehan Lee, Kyungchul Park, Janghyun Baek] Multicast routing and wavelength assignment (MC-RWA) is an important issue when designing multicast WDM ring networks. Two heuristic multicast routing methods, minimum spanning tree (MST) and shortest path routing (SPT), have been studied extensively. However, the comparison of those two heuristics in terms of the number of required wavelengths is still an open issue because of the lack of efficient optimization methods for MC-RWA. In this paper, using a recently developed optimization algorithm, we compare the two multicast routing methods and optimal MC-RWA. The results show that SPT requires about 1-12% more wavelengths than MST. Moreover, the number of required wavelengths under MST routing is shown to be very close to that of the optimal solution. Springer Science+Business Media, LLC, 2011 Multicast WDM nationallicence RWA nationallicence Integer programming nationallicence Lee Taehan Department of Industrial and Information Systems Engineering, Chonbuk National University, 664-14 Deokjin-dong, Deokjin-Gu, 561-756, Jeonju, Korea aut Park Kyungchul School of Business Administration, Myongji University, 50-3 Namgajwa-dong, Seodaemun-gu, 120-728, Seoul, Korea aut Baek Janghyun Department of Industrial and Information Systems Engineering, Chonbuk National University, 664-14 Deokjin-dong, Deokjin-Gu, 561-756, Jeonju, Korea aut Photonic Network Communications Springer US; http://www.springer-ny.com 22/1(2011-08-01), 46-50 1387-974X 22:1<46 2011 22 11107 https://doi.org/10.1007/s11107-011-0305-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11107-011-0305-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lee Taehan Department of Industrial and Information Systems Engineering, Chonbuk National University, 664-14 Deokjin-dong, Deokjin-Gu, 561-756, Jeonju, Korea aut NATIONALLICENCE 700 1- Park Kyungchul School of Business Administration, Myongji University, 50-3 Namgajwa-dong, Seodaemun-gu, 120-728, Seoul, Korea aut NATIONALLICENCE 700 1- Baek Janghyun Department of Industrial and Information Systems Engineering, Chonbuk National University, 664-14 Deokjin-dong, Deokjin-Gu, 561-756, Jeonju, Korea aut NATIONALLICENCE 773 0- Photonic Network Communications Springer US; http://www.springer-ny.com 22/1(2011-08-01), 46-50 1387-974X 22:1<46 2011 22 11107 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer