caa a22 4500 445871105 CHVBK 20180317145511.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s11107-010-0299-2 doi (NATIONALLICENCE)springer-10.1007/s11107-010-0299-2 Analysis of delay mean and variance of collision-free WDM rings with segment recirculation of blocked traffic [Elektronische Daten] [Isaac Seoane, Gerson de los Santos, José Hernández, Manuel Urueña, Ricardo Romeral, Ángel Cuevas, David Larrabeiti] In Tunable-Transmitter Fixed-Receiver (TT-FR)-based Wavelength Division Multiplexed (WDM) ring topologies, each node is provided with a dedicated wavelength (home channel) for reception, which must be shared by the upstream nodes willing to communicate with it. Thus, to avoid channel collisions, it is necessary to define a Medium Access Control (MAC) mechanism that arbitrates access to a given destination wavelength. This work proposes and analyses a simple MAC mechanism that avoids channel collisions by recirculating traffic on the upstream ring segment where congestion was detected. Essentially, whenever a given node has got any traffic to transmit, it must first block access to in-transit traffic, which is reflected back to the upstream node over a second optical fibre. Such blocked traffic is given a second chance to pass through the congested node after a round segment delay, thus making use of the ring topology as buffering units. This work analyses the performance operation of such a MAC protocol under two policies applied to recirculated traffic: (1) recirculation bypass and (2) recirculation store-and-forward. Springer Science+Business Media, LLC, 2010 Optical WDM Rings nationallicence Tunable-Transmitter Fixed-Receiver nationallicence Collision-free WDM metro rings nationallicence Teletraffic analysis nationallicence Delay mean and variance nationallicence Seoane Isaac Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut de los Santos Gerson Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut Hernández José Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut Urueña Manuel Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut Romeral Ricardo Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut Cuevas Ángel Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut Larrabeiti David Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut Photonic Network Communications Springer US; http://www.springer-ny.com 21/3(2011-06-01), 278-287 1387-974X 21:3<278 2011 21 11107 https://doi.org/10.1007/s11107-010-0299-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11107-010-0299-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Seoane Isaac Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut NATIONALLICENCE 700 1- de los Santos Gerson Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut NATIONALLICENCE 700 1- Hernández José Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut NATIONALLICENCE 700 1- Urueña Manuel Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut NATIONALLICENCE 700 1- Romeral Ricardo Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut NATIONALLICENCE 700 1- Cuevas Ángel Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut NATIONALLICENCE 700 1- Larrabeiti David Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain aut NATIONALLICENCE 773 0- Photonic Network Communications Springer US; http://www.springer-ny.com 21/3(2011-06-01), 278-287 1387-974X 21:3<278 2011 21 11107 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer