caa a22 4500 445871067 CHVBK 20180317145511.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s11107-010-0298-3 doi (NATIONALLICENCE)springer-10.1007/s11107-010-0298-3 On the design of node architectures and MAC protocols for optical burst-switched ring networks [Elektronische Daten] [Li-Mei Peng, Won-Hyuk Yang, Young-Chon Kim] Efficient multiple-token-based MAC protocols have been proposed for optical burst-switched (OBS) unidirectional ring networks using a TT-TR-based node architecture in our previous research. However, the unidirectional OBS ring network is difficult to scale to larger networks. As wavelengths accessibilities are dominated by tokens, network performance is restricted by the frequency of capturing a token. If the network is too large, it takes a long time for tokens to rotate. Thus, a destination queue may wait for a long time to be served, which results in large queuing delays and inefficiency of network resource utilization. In order to improve network efficiency and scalability for OBS ring networks using multiple tokens, this work is extended to a bidirectional ring system that uses the tunable transmitter and tunable receiver (TT-TR)-based node architecture with two pairs of transceivers, so that each queue can be served by tokens from both directions. Furthermore, two kinds of node architectures differing in sharing the two pairs of transceivers, either shared or not, are proposed. Then, two MAC protocols considering different queue scheduling algorithms are proposed for the ring network using the proposed node architectures, in order to use the network resources more efficiently. They are improved from general round-robin (GRR) and termed as half-ring round-robin (HfRR) and co-work round-robin (CoRR), respectively. The network performance of the two proposed node architectures and the two proposed MAC protocols for the networks using them as well as the network scalability are evaluated with the OPNET simulator. Springer Science+Business Media, LLC, 2010 MAC nationallicence OBS nationallicence Ring nationallicence TT-TR nationallicence Peng Li-Mei Center for Advanced Image and Information Technology, Chonbuk National University, 561-756, Jeonju, Korea aut Yang Won-Hyuk Center for Advanced Image and Information Technology, Chonbuk National University, 561-756, Jeonju, Korea aut Kim Young-Chon Center for Advanced Image and Information Technology, Chonbuk National University, 561-756, Jeonju, Korea aut Photonic Network Communications Springer US; http://www.springer-ny.com 21/3(2011-06-01), 267-277 1387-974X 21:3<267 2011 21 11107 https://doi.org/10.1007/s11107-010-0298-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11107-010-0298-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Peng Li-Mei Center for Advanced Image and Information Technology, Chonbuk National University, 561-756, Jeonju, Korea aut NATIONALLICENCE 700 1- Yang Won-Hyuk Center for Advanced Image and Information Technology, Chonbuk National University, 561-756, Jeonju, Korea aut NATIONALLICENCE 700 1- Kim Young-Chon Center for Advanced Image and Information Technology, Chonbuk National University, 561-756, Jeonju, Korea aut NATIONALLICENCE 773 0- Photonic Network Communications Springer US; http://www.springer-ny.com 21/3(2011-06-01), 267-277 1387-974X 21:3<267 2011 21 11107 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer