Monday, 19 September, 2011
16:45 -- 18:30
Room K

Mo.2.K • Flexible And Elastic Optical Networks

Chair: Idelfonso Tafur Monroy; DTU Space, Denmark
Mo.2.K.1 • 16:45 (Invited)
Ken-ichi Sato1; 1EECS, Nagoya University, Japan.
 Elastic optical path network has the potential to advance networks, however, the requirements and benefits differ among the users (carriers/service providers and leased line users), network segment (core or metro), and level of operations (static or dynamic).
Mo.2.K.2 • 17:15
IP Traffic Offloading to Elastic Optical Layer Using Multi-flow Optical Transponder
Masahiko Jinno1, Yoshiaki Sone1, Hidehiko Takara1, Akira Hirano1, Kazushige Yonenaga1, Shingo Kawai1; 1NTT Network Innovation Labs, Japan.
We propose introducing a multi-flow optical transponder combined with elastic optical networking to achieve efficient router-bypass at the optical layer. Numerical evaluation shows considerable savings in the required IP router port count and spectral usage.
Mo.2.K.3 • 17:30
Disruption Minimized Spectrum Defragmentation in Elastic Optical Path Networks that Adopt Distance Adaptive Modulation
Tatsumi Takagi1, Hiroshi Hasegawa1, Ken-ichi Sato1, Yoshiaki Sone2, Akira Hirano2, Masahiko Jinno2; 1Nagoya University, Japan; 2NTT Network Innovation Laboratories, Japan.
 We evaluate disruption-minimized spectrum defragmentation in dynamic elastic optical path networks that adopt distance adaptive modulation. Numerical experiments elucidate that the number of accommodated paths is improved by 10% by the introduction of make-before-break rerouting.
Mo.2.K.4 • 17:45
Dynamic On-demand Lightpath Provisioning Using Spectral Defragmentation in Flexible Bandwidth Networks
Ke Wen1, Yawei Yin1, David J. Geisler1, Shuo Chang1, S. J. Ben Yoo1; 1Electrical and Computer Engineering, University of California, Davis, USA.
 We propose a spectral defragmentation algorithm and corresponding node architectures with wavelength conversion to support on-demand lightpath provisioning in flexible bandwidth optical networks. Simulation results demonstrate six-fold reductions in blocking rates with defragmentation.
Mo.2.K.5 • 18:00
Wavelength Path Reconfiguration to Reduce Fragmentation and Number of Operations in WDM Mesh Networks
Akihiro Kadohata1, Akira Hirano1, Yoshiaki Sone1, Osamu Ishida1; 1Network Innovation Laboratories, NTT Corporation, Japan.
This paper proposes a novel wavelength path reconfiguration scheme that reduces the number of operations while retaining the effectiveness of defragmentation. Numerical evaluation shows that the number of operations is reduced by approximately 50%.
Mo.2.K.6 • 18:15
Blocking Performance in Dynamic Flexible Grid Optical Networks - What is the Ideal Spectrum Granularity?
Xi Wang1, Qiong Zhang1, Inwoong Kim1, Paparao Palacharla1, Motoyoshi Sekiya1; 1Fujitsu Labs of America, USA.
We show that the ideal spectrum granularity in dynamic flexible grid networks to achieve best blocking performance is determined by the greatest common factor of spectrum widths of all mixed-rate signals.