eprintid: 1431930 rev_number: 28 eprint_status: archive userid: 608 dir: disk0/01/43/19/30 datestamp: 2014-06-11 18:39:04 lastmod: 2021-10-04 02:01:52 status_changed: 2014-06-11 18:39:04 type: article metadata_visibility: show item_issues_count: 0 creators_name: Savory, SJ title: Congestion Aware Routing in Nonlinear Elastic Optical Networks ispublished: pub divisions: UCL divisions: B04 divisions: C05 keywords: Optical fiber communication, networks, routing, adaptive modulation, extreme value distributions note: © 2014 IEEE. This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/ abstract: In elastic optical networks, digital coherent transceivers modify their symbol rate, modulation format, and forward error correction to best serve the network demands. In a nonlinear elastic optical network, these parameters are inherently coupled with the routing algorithm. We propose to use congestion aware routing in a nonlinear elastic optical network and demonstrate its efficacy for the NSFNET reference network (14 nodes, 22 links). The network is sequentially loaded with 100 GbE demands until a demand becomes blocked, this procedure being repeated 10000 times to estimate the network blocking probability (NBP). Three routing algorithms are considered: 1) shortest path routing; 2) simple congestion aware algorithm; and 3) weighted congestion aware routing algorithm with 50, 25, 12.5, and 6.25 GHz resolution flexgrids. For NBP = 1% using a 50 GHz grid, congestion aware routing doubles the network capacity compared with the shortest path routing. When congestion aware routing is combined with a 6.25 GHz resolution flexgrid, a fivefold increase in network capacity is afforded. date: 2014-05-15 official_url: http://dx.doi.org/10.1109/LPT.2014.2314438 vfaculties: VENG oa_status: green full_text_type: pub primo: open primo_central: open_green verified: verified_manual elements_source: WoS-Lite elements_id: 950274 doi: 10.1109/LPT.2014.2314438 lyricists_name: Savory, Sebastian lyricists_id: SSAVO08 full_text_status: public publication: IEEE PHOTONICS TECHNOLOGY LETTERS volume: 26 number: 10 pagerange: 1057 - 1060 issn: 1041-1135 citation: Savory, SJ; (2014) Congestion Aware Routing in Nonlinear Elastic Optical Networks. IEEE PHOTONICS TECHNOLOGY LETTERS , 26 (10) 1057 - 1060. 10.1109/LPT.2014.2314438 <https://doi.org/10.1109/LPT.2014.2314438>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/1431930/1/06781032.pdf