Wide-Sense Nonblocking Multicast in WDM Optical Linear Array and Ring Networks with 3-Length Extension Under Longest Link First Routing

8135e524-c87a-43cc-a679-970c80611fd420220705073622408wseas:wseasmdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON COMPUTERS2224-28721109-275010.37394/23205http://wseas.org/wseas/cms.action?id=40261520221520222110.37394/23205.2022.21https://wseas.com/journals/computers/2022.phpWide-Sense Nonblocking Multicast in WDM Optical Linear Array and Ring Networks with 3-Length Extension Under Longest Link First RoutingM.SabrigirirajDepartment of ECE, SVS College of Engineering, Coimbatore, 642 109, Tamilnadu, INDIAK.ManoharanDepartment of ECE, SNS College of Technology, Coimbatore, 641 035, Tamilnadu, INDIAR.KarthikDepartment of ECE, Sri Krishna College of Technology, Coimbatore, 641042, Tamilnadu, INDIAThe modern scientific growths in optical networks based on wavelength division multiplexing (WDM) are more attractive to satisfy the high bandwidth requirements of the modern internet infrastructure. Moreover, they potential to satisfy the future bandwidth requirements.WDM optical networks act as the backbone for telecommunication and high-performance communication networks. Multicast communication is the simultaneous transmission of data from one source node to many destination nodes available in the network over wavelength division multiplexing. It is extensively deployed in high performance computing and communication networks. In this article, a linear array and ring networks are extended by directly linking all nodes which are separated by two intermediate nodes with additional fibers which is referred as linear array and ring network with 3-length extension. The wavelength allotment methods are proposed to realize one-to-many communication over wavelength division multiplexing optical linear array and ring with 2-length extension under longest link first routing and the minimum wavelength number needed is determined. The minimum wavelength number needed to support for the extended linear array is reduced approximately by 20% when compared with that of a linear array network and for the extended unidirectional ring is reduced approximately by 25% when compared with that of a unidirectional ring network. And also, for the extended bidirectional ring the minimum wavelength number is reduced approximately by 33% when compared with that of bidirectional ring network.75202275202226326932https://wseas.com/journals/computers/2022/a645105-029(2022).pdf10.37394/23205.2022.21.32https://wseas.com/journals/computers/2022/a645105-029(2022).pdf10.1109/26.975778Zhou, C., Yang, Y.:Wide-sense nonblocking multicast in a class of regular optical WDM networks. IEEE Trans. Comm. 50, 126–134 (2002) 10.1109/tc.2010.125Zheng, S.Q.: An optimal wide-sense nonblocking distributor. IEEE Trans. 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